Compilare: main.cpp: In function 'int main()': main.cpp:78:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (cycle.size() != m + 1) ~~~~~~~~~~~~~^~~~~~~~ main.cpp:86:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < cycleEdges.size(); i++) ~~^~~~~~~~~~~~~~~~~~~ main.cpp:54:36: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("fotbal2.in", "r", stdin); ^ main.cpp:55:38: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("fotbal2.out", "w", stdout); ^ main.cpp:58:24: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &n, &m); ^ main.cpp:62:26: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &u, &v); ^