Compilare: user.cpp: In function ‘void dfsJos(int)’: user.cpp:57:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < gf[node].size(); ++i) { ^ user.cpp:72:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < gf[node].size(); ++i) { ^ user.cpp: In function ‘void dfsSus(int)’: user.cpp:145:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < gf[node].size(); ++i) { ^ user.cpp: In function ‘void dfs(int)’: user.cpp:203:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<gf[node].size(); ++i){ ^ user.cpp: In function ‘int main()’: user.cpp:215:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("revolta.in", "r", stdin); ^ user.cpp:216:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("revolta.out", "w", stdout); ^