foo.cc: In function 'int main()':
foo.cc:10:15: warning: unused variable 'x' [-Wunused-variable]
   10 |     int n,i,j,x;
      |               ^
foo.cc:11:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   11 |     scanf("%d",&n);
      |     ~~~~~^~~~~~~~~
foo.cc:13:11: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   13 |      scanf("%d",&c[i]);
      |      ~~~~~^~~~~~~~~~~~
foo.cc:16:12: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   16 |       scanf("%d",&map[i][j]);
      |       ~~~~~^~~~~~~~~~~~~~~~~

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