Compilare: user.cpp: In function ‘void dfs(int, int)’: user.cpp:54:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < vecini[x].size(); i++) ^ user.cpp: In function ‘void afisare()’: user.cpp:85:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < sol.size(); i++) ^ user.cpp:87:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < sol[i].size(); j++) ^ user.cpp: In function ‘void citire()’: user.cpp:18:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &n, &m); ^ user.cpp:24:37: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &tmp1, &tmp2); ^ user.cpp: In function ‘int main()’: user.cpp:97:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("biconex.in", "r", stdin); ^ user.cpp:98:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("biconex.out", "w", stdout); ^