/in/foo.cc: In function 'bool dfs(int)':
/in/foo.cc:24:9: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
         if (vis[v]) continue; vis[v]=1;
         ^~
/in/foo.cc:24:31: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'if'
         if (vis[v]) continue; vis[v]=1;
                               ^~~
/in/foo.cc: In function 'int main()':
/in/foo.cc:34:28: warning: format '%f' expects argument of type 'float*', but argument 4 has type 'double*' [-Wformat=]
     scanf("%d%d%f",&n,&m,&t);
                          ~~^