Compilare: main.cpp: In function 'void dfs(int)': main.cpp:69:12: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<g[k].size();i++) ~^~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:22:37: 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:23:38: 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: In function 'void citire()': main.cpp:37:26: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d ", &n, &m); ^ main.cpp:43:28: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d ", &x, &y); ^