foo.cc: In function 'void init()':
foo.cc:32:24: warning: format '%s' expects argument of type 'char*', but argument 2 has type 'char (*)[25]' [-Wformat=]
         scanf("%s", &ch);
                     ~~~^
foo.cc:44:24: warning: format '%s' expects argument of type 'char*', but argument 2 has type 'char (*)[25]' [-Wformat=]
         scanf("%s", &ch);
                     ~~~^
foo.cc:63:31: warning: suggest parentheses around arithmetic in operand of '|' [-Wparentheses]
                 addedge(i, (i & (~resf[j]) | rest[j]), tim[j]);
                             ~~^~~~~~~~~~~~
foo.cc:28:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d%d", &N, &M);
     ~~~~~^~~~~~~~~~~~~~~~
foo.cc:31:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d", &tim[i]);
         ~~~~~^~~~~~~~~~~~~~~
foo.cc:32:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%s", &ch);
         ~~~~~^~~~~~~~~~~
foo.cc:44:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%s", &ch);
         ~~~~~^~~~~~~~~~~

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