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  1. #include <stdio.h>
  2. int sumofsquare(int x)
  3. {
  4. if(x==1)
  5. return 1;
  6. else
  7. return x+sumofsquare(x-1);
  8. }
  9. int main(void) {
  10. int n;
  11. scanf("&d",&n);
  12. printf("%d\n",sumofsquare(n));
  13. return 0;
  14. }
  15.  
Success #stdin #stdout 0s 5320KB
stdin
1
stdout
536854528