foo.cc: In function 'int main()':
foo.cc:47:8: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
    if(k=R*C) break;
       ~^~~~
foo.cc:33:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d %d",&R,&C);
  ~~~~~^~~~~~~~~~~~~~~
foo.cc:36:9: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
    scanf("%d",&D[i][j]);
    ~~~~~^~~~~~~~~~~~~~~
foo.cc:50:8: warning: ignoring return value of 'int system(const char*)', declared with attribute warn_unused_result [-Wunused-result]
  system("pause");
  ~~~~~~^~~~~~~~~

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