Compilare: user.cpp: In function ‘int main()’: user.cpp:39:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < d[i].size(); ++j) ^ user.cpp:18:12: warning: unused variable ‘x’ [-Wunused-variable] int n, x, nr, ok = 1, t; swaps p; ^ user.cpp:18:15: warning: unused variable ‘nr’ [-Wunused-variable] int n, x, nr, ok = 1, t; swaps p; ^ user.cpp:15:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("cinema.in", "r", stdin); ^ user.cpp:16:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("cinema.out", "w", stdout); ^ user.cpp:19:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^ user.cpp:21:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &v[i]); ^