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  1. #include <stdio.h>
  2. int sumofsquare(int n){
  3. if(n==1)
  4. return 1;
  5. else
  6. return n*n+sumofsquare(n-1);
  7. }
  8.  
  9. int main(void) {
  10. int n;
  11. scanf("%d",&n);
  12. printf("%d",sumofsquare(n));
  13. return 0;
  14. }
  15.  
Success #stdin #stdout 0s 5296KB
stdin
5
stdout
55