foo.cc: In function 'int main()':
foo.cc:97:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d",&m);
   ~~~~~^~~~~~~~~
foo.cc:100:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%s",map[k][i]+1);
     ~~~~~^~~~~~~~~~~~~~~~~~

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