Compilare: user.cpp: In function ‘int nodComun(int, int, int)’: user.cpp:20:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < v[a].size(); ++i) ^ user.cpp:21:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < v[b].size(); ++j) ^ user.cpp: In function ‘void caz1(int)’: user.cpp:35:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < v[nod].size(); ++i) { ^ user.cpp: In function ‘void caz2(int, int)’: user.cpp:61:42: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < v[nod1].size(); ++i) { ^ user.cpp: In function ‘void primaLinie(int, int)’: user.cpp:97:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < v[nod].size(); ++i) { ^ user.cpp:89:10: warning: variable ‘bun’ set but not used [-Wunused-but-set-variable] bool bun = true; ^ user.cpp: In function ‘int main()’: user.cpp:196:49: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < v[nod].size(); ++i) ^ user.cpp:138:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("puzzle2.in", "r", stdin); ^ user.cpp:139:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("puzzle2.out", "w", stdout); ^ user.cpp:143:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &n, &m); ^ user.cpp:145:30: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &x, &y); ^