Compilare: user.cpp: In function ‘void task2()’: user.cpp:60:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0; i < St[t].size(); ++ i) ^ user.cpp: In function ‘void read()’: user.cpp:17:42: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("civilizatie.in", "r", stdin); ^ user.cpp:18:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &p); ^ user.cpp:19:41: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d %d", &x, &y, &t, &n); ^ user.cpp: In function ‘void task2()’: user.cpp:50:31: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &X, &Y); ^ user.cpp: In function ‘void write()’: user.cpp:90:44: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("civilizatie.out", "w", stdout); ^