Compilare: user.cpp: In function ‘void solve()’: user.cpp:88:23: warning: unused variable ‘ok’ [-Wunused-variable] bool ok = 0; ^ user.cpp:85:15: warning: unused variable ‘ok’ [-Wunused-variable] bool ok = 0; ^ user.cpp: In function ‘void read()’: user.cpp:7:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("pavare3.in", "r", stdin); ^ user.cpp:8:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &n, &p); ^ user.cpp: In function ‘void write()’: user.cpp:98:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("pavare3.out", "w", stdout); ^