Compilare: user.cpp: In function ‘int main()’: user.cpp:31:10: warning: unused variable ‘finishedL’ [-Wunused-variable] bool finishedL = (L == 0); ^ user.cpp:32:10: warning: unused variable ‘finishedR’ [-Wunused-variable] bool finishedR = (R == 0); ^ user.cpp:33:10: warning: unused variable ‘finishedU’ [-Wunused-variable] bool finishedU = (U == 0); ^ user.cpp:12:32: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("lru.in", "r", stdin); ^ user.cpp:13:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("lru.out", "w", stdout); ^ user.cpp:15:18: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &T); ^ user.cpp:18:38: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%s%s", &N, A + 1, B + 1); ^