Compilare: user.cpp: In function ‘bool FLUX(int)’: user.cpp:61:42: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < v[nod].size (); ++i) { ^ user.cpp: In function ‘void solve()’: user.cpp:107:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < v[i].size (); ++j) ^ user.cpp: In function ‘void read()’: user.cpp:31:33: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%d%d%d", &n, &m, &k); ^ user.cpp:33:37: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%d%d%d", &x, &y, &c); ^ user.cpp: In function ‘int main()’: user.cpp:113:42: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("terenuri3d.in", "r", stdin); ^ user.cpp:114:44: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("terenuri3d.out", "w", stdout); ^