PROGRAMMING:ACM-ICPC
International Collegiate Programming Contest (ICPC) is an annual competition sponsored by ACM, which aims to show college students' innovative ability, team spirit and ability to write programs, analyze and solve problems under pressure. After nearly 40 years of development, ACM International Undergraduate programming competition has developed into the most influential undergraduate programming competition in the world.
The history of ACM International Undergraduate programming competition can be traced back to 1970, when the first competition was held in Texas A & M University. At that time, the organization was the alpha chapter of the UPE computer science honor society. As a new way to discover and cultivate top computer science students, the competition soon received positive responses from universities in the United States and Canada. In 1977, during the ACM computer science conference, the first finals were held, and it has evolved into an international competition participated by many countries once a year.
In the first few competitions, the teams mainly came from the United States and Canada, and then gradually developed into a worldwide competition. Especially since IBM began to sponsor events in 1997, the scale of events has grown rapidly. In 1997, 840 teams from 560 universities participated in the competition. In 2004, the number increased rapidly to 4109 teams in 840 universities, with an annual growth rate of 10-20%.
In the 1980s, ACM headquartered the competition at Baylor University in Texas.
In the early days of the event, the champions were mostly won by universities in the United States and Canada. Since the late 1990s, universities in Russia and other Eastern European countries have won several Championships in succession. The Shanghai Jiao Tong University delegation from Chinese mainland was elected three in the thirty-fourth global Finals held in Hawaii in 2002 in the twenty-sixth and 2005 in Shanghai and in 2005 in Harbin. Zhejiang University's team won the global championship in the 35th ACM International Undergraduate Program Design Competition, which ended at 2:00 p.m. local time on May 30, 2011 * *, becoming the only Asian University to win the global championship of ACM International Undergraduate Program Design Competition except Shanghai Jiaotong University. This is also the best result of Asian universities in the competition so far. The competition pattern of the event has evolved from the original North American universities to the current situation of Asia Europe confrontation.
In April 2018, ACM-ICPC worldfinal was held in Beijing, China. It was hosted by Peking University. Finally, Peking University won the gold medal by completing question G.
The competition lasts for 5 hours, and generally has 7 or more questions, which are completed by three players of the same team using the same computer. When a question is solved, it is submitted to the judges, who will judge whether it is correct or not. If the submitted program does not work correctly, the program will be returned to the participating team, and the participating team can modify it and submit the problem again. There are seven kinds of results
1. Accepted（ AC)
2. Wrong answer（ WA)
3. Runtime error -- program running error, unexpected termination, etc（ RE)
4. Time limit exceeded. The program didn't give an answer within the specified time（ TLE)
5. Presentation error. The program did not output the answer in the specified format（ PE)
6. Memory limit exceeded. The program didn't give an answer in the prescribed space（ MLE)
7. Compile error. The program does not compile well（ CE)
At the end of the competition, each team will be ranked according to the number of problems solved. If the number of problems solved is the same, it will be ranked according to the total time. Total time is the sum of time spent on each problem solved. The time taken for a solved problem is from the start of the competition to the time when the submission is accepted, plus the penalty time for the problem (no more than 20 minutes for each traffic mention). Problems that have not been solved are not timed. For example: team a and team B both completed two questions correctly. Team a submitted the two questions at 1:00 and 2:45 after the start of the competition, and team B submitted the two questions at 1:20 and 2:00, but team B submitted one question twice. In this way, the total time of team a is 1:00 + 2:45 = 3:45, while team B is 1:20 + 2:00 + 0:20 = 3:40, so team B wins with less total time. American English is the working language of the competition. All written materials (including test questions) of the competition will be written in American English. Other languages can be used in regional competitions. The programming languages that can be used in the finals include Pascal, C, C + + and Java, as well as other languages. The specific operating system and language versions vary from year to year.
$$\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \From Baidu Encyclopedia
Now, how many times has China won the championship by 2019.
###Input format:
No input
###Output format:
Output a positive integer in a line, representing the number of times China has won the championship
###Input example:
There is no input for this question
```in
```
###Output example:
If China has won a total of five championships, output 5 (incorrect answer). For example:
```out
five
```
answer：If there is no answer, please comment
The history of ACM International Undergraduate programming competition can be traced back to 1970, when the first competition was held in Texas A & M University. At that time, the organization was the alpha chapter of the UPE computer science honor society. As a new way to discover and cultivate top computer science students, the competition soon received positive responses from universities in the United States and Canada. In 1977, during the ACM computer science conference, the first finals were held, and it has evolved into an international competition participated by many countries once a year.
In the first few competitions, the teams mainly came from the United States and Canada, and then gradually developed into a worldwide competition. Especially since IBM began to sponsor events in 1997, the scale of events has grown rapidly. In 1997, 840 teams from 560 universities participated in the competition. In 2004, the number increased rapidly to 4109 teams in 840 universities, with an annual growth rate of 10-20%.
In the 1980s, ACM headquartered the competition at Baylor University in Texas.
In the early days of the event, the champions were mostly won by universities in the United States and Canada. Since the late 1990s, universities in Russia and other Eastern European countries have won several Championships in succession. The Shanghai Jiao Tong University delegation from Chinese mainland was elected three in the thirty-fourth global Finals held in Hawaii in 2002 in the twenty-sixth and 2005 in Shanghai and in 2005 in Harbin. Zhejiang University's team won the global championship in the 35th ACM International Undergraduate Program Design Competition, which ended at 2:00 p.m. local time on May 30, 2011 * *, becoming the only Asian University to win the global championship of ACM International Undergraduate Program Design Competition except Shanghai Jiaotong University. This is also the best result of Asian universities in the competition so far. The competition pattern of the event has evolved from the original North American universities to the current situation of Asia Europe confrontation.
In April 2018, ACM-ICPC worldfinal was held in Beijing, China. It was hosted by Peking University. Finally, Peking University won the gold medal by completing question G.
The competition lasts for 5 hours, and generally has 7 or more questions, which are completed by three players of the same team using the same computer. When a question is solved, it is submitted to the judges, who will judge whether it is correct or not. If the submitted program does not work correctly, the program will be returned to the participating team, and the participating team can modify it and submit the problem again. There are seven kinds of results
1. Accepted（ AC)
2. Wrong answer（ WA)
3. Runtime error -- program running error, unexpected termination, etc（ RE)
4. Time limit exceeded. The program didn't give an answer within the specified time（ TLE)
5. Presentation error. The program did not output the answer in the specified format（ PE)
6. Memory limit exceeded. The program didn't give an answer in the prescribed space（ MLE)
7. Compile error. The program does not compile well（ CE)
At the end of the competition, each team will be ranked according to the number of problems solved. If the number of problems solved is the same, it will be ranked according to the total time. Total time is the sum of time spent on each problem solved. The time taken for a solved problem is from the start of the competition to the time when the submission is accepted, plus the penalty time for the problem (no more than 20 minutes for each traffic mention). Problems that have not been solved are not timed. For example: team a and team B both completed two questions correctly. Team a submitted the two questions at 1:00 and 2:45 after the start of the competition, and team B submitted the two questions at 1:20 and 2:00, but team B submitted one question twice. In this way, the total time of team a is 1:00 + 2:45 = 3:45, while team B is 1:20 + 2:00 + 0:20 = 3:40, so team B wins with less total time. American English is the working language of the competition. All written materials (including test questions) of the competition will be written in American English. Other languages can be used in regional competitions. The programming languages that can be used in the finals include Pascal, C, C + + and Java, as well as other languages. The specific operating system and language versions vary from year to year.
$$\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \From Baidu Encyclopedia
Now, how many times has China won the championship by 2019.
###Input format:
No input
###Output format:
Output a positive integer in a line, representing the number of times China has won the championship
###Input example:
There is no input for this question
```in
```
###Output example:
If China has won a total of five championships, output 5 (incorrect answer). For example:
```out
five
```
answer：If there is no answer, please comment