Compilare: main.cpp: In function 'void DFS(int)': main.cpp:24:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int i = 0; i < Ad[nod].size(); ++i ) ~~^~~~~~~~~~~~~~~~ main.cpp: In function 'void DFSr(int)': main.cpp:54:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int i = 0; i < Ad_r[nod].size(); ++i ) ~~^~~~~~~~~~~~~~~~~~ main.cpp: In function 'void Solve()': main.cpp:74:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int j = 0; j < C[i].size(); ++j ) ~~^~~~~~~~~~~~~ main.cpp:74:9: warning: this 'for' clause does not guard... [-Wmisleading-indentation] for( int j = 0; j < C[i].size(); ++j ) ^~~ main.cpp:75:37: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for' fout << C[i][j] << ' '; fout << '\n';} ^~~~