foo.cc: In function 'int main()':
foo.cc:27:7: warning: suggest explicit braces to avoid ambiguous 'else' [-Wdangling-else]
   27 |     if(j==n-1)
      |       ^
foo.cc:40:7: warning: suggest explicit braces to avoid ambiguous 'else' [-Wdangling-else]
   40 |     if(j==n-1)
      |       ^
foo.cc:5:14: warning: unused variable 'max' [-Wunused-variable]
    5 |  int m,n,i,j,max,min,s;
      |              ^~~
foo.cc:5:18: warning: unused variable 'min' [-Wunused-variable]
    5 |  int m,n,i,j,max,min,s;
      |                  ^~~
foo.cc:5:22: warning: unused variable 's' [-Wunused-variable]
    5 |  int m,n,i,j,max,min,s;
      |                      ^

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