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  1. #include <stdio.h>
  2.  
  3. int main() {
  4. int n;
  5. int i,j;
  6. scanf("%d",&n);
  7. int arr[100];
  8. for(i=0;i<100;i++) {
  9. arr[i]=n%2;
  10. n=n/2;
  11. if(n==0) break;
  12. }
  13. for(j=i;j>=0;j--) {
  14. printf("%d",arr[i]);
  15. }
  16. }
  17.  
Success #stdin #stdout 0s 4552KB
stdin
7
stdout
111