PROGRAMMING:C programming experiment 3-2

Calculate 1 $$* $$2 $$* $$3 + 3 $$* $$4 $$* $$5 + $$... $+ 99 $$* 1 $$00 $$* $$101
###Input format:
No input is required.
###Output format:
Output the accumulated results in the form of output examples.
###Input example:
```in
```
###Output example:
```out
sum=13002450
```







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