PROGRAMMING:Number of triangles
It is said that mathematicians of the Pythagorean School in ancient Greece (about 570-500 BC) often studied mathematical problems on the beach. They drew dots or used small stones to express numbers on the beach. For example, they have studied 1, 3, 6, 10, 15, 21, 28, 36, 45, 55, 66, 78, 91... These numbers are called triangle numbers.
Program the first 50 triangles into the array, and then output. Every 10 lines.
###Input example:
```in
```
###Output example:
```out
1 3 6 10 15 21 28 36 45 55
66 78 91 105 120 136 153 171 190 210
231 253 276 300 325 351 378 406 435 465
496 528 561 595 630 666 703 741 780 820
861 903 946 990 1035 1081 1128 1176 1225 1275
```
answer：If there is no answer, please comment
Program the first 50 triangles into the array, and then output. Every 10 lines.
###Input example:
```in
```
###Output example:
```out
1 3 6 10 15 21 28 36 45 55
66 78 91 105 120 136 153 171 190 210
231 253 276 300 325 351 378 406 435 465
496 528 561 595 630 666 703 741 780 820
861 903 946 990 1035 1081 1128 1176 1225 1275
```
answer：If there is no answer, please comment