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  1. #include <stdio.h>
  2.  
  3. int main(void) {
  4. int n=1,sum=1;
  5. scanf("%d",&n);
  6. do{
  7. n=n+1;
  8. sum=sum+n;
  9. }while(sum<100);
  10. printf("%d",n);
  11. return 0;
  12. }
  13.  
Success #stdin #stdout 0s 5280KB
stdin
Standard input is empty
stdout
14