Compilare: user.cpp: In function ‘int main()’: user.cpp:27:9: warning: unused variable ‘i’ [-Wunused-variable] int i, j; ^ user.cpp:27:12: warning: unused variable ‘j’ [-Wunused-variable] int i, j; ^ user.cpp:28:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("ikebana.in", "r", stdin); ^ user.cpp:29:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("ikebana.out", "w", stdout); ^ user.cpp:30:32: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d", &n, &p, &t); ^