Compilare: user.cpp: In function ‘void solveCTC(std::vector<int>)’: user.cpp:74:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < nodes.size(); ++ i) ^ user.cpp:81:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < nodes.size(); ++ i) ^ user.cpp:84:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < g[node].size(); ++ j) ^ user.cpp:109:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < nodes.size(); ++ i) ^ user.cpp:122:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < nodes.size(); ++ i) ^ user.cpp:131:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < nodes.size(); ++ i) ^ user.cpp: In function ‘void dfp(int)’: user.cpp:138:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < g[node].size(); ++ i) ^ user.cpp: In function ‘void dfm(int)’: user.cpp:153:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < gt[node].size(); ++ i) ^ user.cpp: In function ‘int main()’: user.cpp:163:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("network.in", "r", stdin); ^ user.cpp:164:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("network.out", "w", stdout); ^ user.cpp:166:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%i %i", &n, &m); ^ user.cpp:171:43: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %lf %lf", &x, &y, &p0, &p1); ^