foo.cc: In function 'int getans(char*, int, int)':
foo.cc:6:17: warning: unused variable 'num' [-Wunused-variable]
    6 |         int x=0,num=0;
      |                 ^~~
foo.cc: In function 'int main()':
foo.cc:26:5: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
   26 |     for(int i=0;i<m;i++)
      |     ^~~
foo.cc:28:9: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for'
   28 |         return 0;
      |         ^~~~~~

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