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);x=0;for (i=1;i<=m;i++) x+=i*i*i;if (x>n){printf("0");return 0;}
     ~~~~~^~~~~~~~~~~~~~