Compilare: user.cpp: In function ‘int main()’: user.cpp:12:41: warning: variable ‘lm’ set but not used [-Wunused-but-set-variable] int ar = n * m / 2, a2 = 0, NR = 0, lm, cm; ^ user.cpp:12:45: warning: variable ‘cm’ set but not used [-Wunused-but-set-variable] int ar = n * m / 2, a2 = 0, NR = 0, lm, cm; ^ 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:8:40: 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); ^ user.cpp:9:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &n, &m); ^