Compilare: user.cpp: In function ‘int main()’: user.cpp:57:47: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j = 0; j < graph [nod].size (); ++ j) ^ user.cpp:60:59: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (k = j + 1; k < graph [nod].size (); ++ k) ^ user.cpp:64:71: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (l = k + 1; l < graph [nod].size (); ++ l) { ^ user.cpp:80:47: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j = 0; j < graph [nod].size (); ++ j) { ^ user.cpp:34:26: warning: variable ‘g’ set but not used [-Wunused-but-set-variable] int n, m, x, y, nod, g, i, j, k, l, num, A, B, C; ^ user.cpp:36:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("count.in", "r", stdin); ^ user.cpp:37:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("count.out", "w", stdout); ^ user.cpp:39:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%d%d", &n, &m); ^ user.cpp:41:31: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%d%d", &x, &y); ^