foo.cc: In function 'void pre()':
foo.cc:11:10: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
   11 |          for(int j=1;j<=sqrt(i);j++)
      |          ^~~
foo.cc:17:11: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for'
   17 |           ys[i]-=i;
      |           ^~
foo.cc: In function 'int main()':
foo.cc:25:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   25 |     scanf("%d",&s);
      |     ~~~~~^~~~~~~~~

Found 10 testcases.
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