Compilare: user.cpp: In function ‘void df(int)’: user.cpp:91:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0; i < v[n].size(); i++) ^ user.cpp:80:32: warning: unused variable ‘en’ [-Wunused-variable] int i, x, y, f, l, pn, pf, en, ef, nf = 0, a ,c; ^ user.cpp:80:36: warning: unused variable ‘ef’ [-Wunused-variable] int i, x, y, f, l, pn, pf, en, ef, nf = 0, a ,c; ^ user.cpp: In function ‘int main()’: user.cpp:155:21: warning: variable ‘pok’ set but not used [-Wunused-but-set-variable] int i, j, k, l, pok, dok; ^ user.cpp:157:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("camion.in", "r", stdin); ^ user.cpp:159:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &N, &P); ^ user.cpp:163:31: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d", &i, &j, &l); ^ user.cpp:171:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("camion.out", "w", stdout); ^