Compilare: user.cpp: In function ‘void adauga(int, int)’: user.cpp:12:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < vt[x].size(); i ++) ^ user.cpp:19:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < v[y].size(); i ++) ^ user.cpp: In function ‘void sterge(int, int)’: user.cpp:32:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < vt[x].size(); i ++) ^ user.cpp:41:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < v[y].size(); i ++) ^ user.cpp: In function ‘int main()’: user.cpp:62:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("prietene.in","r",stdin); ^ user.cpp:63:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("prietene.out","w",stdout); ^ user.cpp:64:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&Q1); ^ user.cpp:76:33: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d\n", &n, &m); ^ user.cpp:79:37: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d\n", &x, &y); ^ user.cpp:86:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d\n",&Q); ^ user.cpp:89:43: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%c %d %d\n",&c, &x, &y); ^