foo.cc: In function 'int main()':
foo.cc:10:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
 {   scanf("%d%d",&n,&m);if (m>13) {printf("0");return 0;}x=0;for (o=1;o<=m;o++) x+=o*o*o;if (x>n){printf("0");return 0;}
     ~~~~~^~~~~~~~~~~~~~