Compilare: user.cpp: In function ‘int dfs(int)’: user.cpp:17:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < v[nod].v.size(); i++) ^ user.cpp: In function ‘void setvmax(int, int, int)’: user.cpp:25:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < v[nod].v.size(); i++) ^ user.cpp: In function ‘void dfs2(int)’: user.cpp:38:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < v[nod].v.size(); i++) ^ user.cpp: In function ‘int main()’: user.cpp:67:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < v[i].v.size(); j++) ^ user.cpp:78:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < nrez.size(); i++) ^ user.cpp:48:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("sediu.in", "r", stdin); ^ user.cpp:49:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("sediu.out", "w", stdout); ^ user.cpp:50:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^ user.cpp:54:30: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &a, &b); ^