foo.cc: In function 'int main()':
foo.cc:20:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   20 |     freopen("cost.in","r",stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~
foo.cc:21:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   21 |     freopen("cost.out","w",stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~
foo.cc:22:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   22 |     scanf("%d%d%d%d%d",&n,&rs,&cs,&rt,&ct);
      |     ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
foo.cc:23:32: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   23 |     for(int i=1;i<=n;++i) scanf("%s",mp[i]+1);
      |                           ~~~~~^~~~~~~~~~~~~~

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Found 10 testcases.
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