Compilare: user.cpp: In function ‘void solve()’: user.cpp:26:9: warning: unused variable ‘p’ [-Wunused-variable] int p = b[0], i = 1; ^ user.cpp: In function ‘void write()’: user.cpp:51:9: warning: unused variable ‘a0’ [-Wunused-variable] int a0, i; ^ user.cpp: In function ‘void read()’: user.cpp:17:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("numar4.in", "r", stdin); ^ user.cpp:18:33: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &a[0], &b[0]); ^ user.cpp:20:38: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &a[a[0] - i + 1]); ^ user.cpp:22:38: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &b[b[0] - i + 1]); ^ user.cpp: In function ‘void write()’: user.cpp:52:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("numar4.out", "w", stdout); ^