Compilare: user.cpp: In function ‘void dfs(int)’: user.cpp:30:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < list[node].size(); i++) { ^ user.cpp: In function ‘void solve(int)’: user.cpp:74:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0; i < who[node].size(); i++) { ^ user.cpp:88:50: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (pos1 = 0; pos1 < who[node].size() && !who[son].empty(); pos1++) { ^ user.cpp:89:49: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (pos2 + 1 < who[son].size()) { ^ user.cpp: In function ‘int main()’: user.cpp:119:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("mesaj3.in","r",stdin); ^ user.cpp:120:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("mesaj3.out","w",stdout); ^ user.cpp:122:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^ user.cpp:124:30: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &x, &y); ^ user.cpp:130:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &m); ^ user.cpp:132:41: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d", &x, &y, &pay[i]); ^