Compilare: user.cpp: In function ‘int main()’: user.cpp:18:3: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if(n >= 1 && m >= 1) ^ user.cpp:4:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("dreptunghi.in","r",stdin); ^ user.cpp:5:41: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("dreptunghi.out","w",stdout); ^ user.cpp:9:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d",&n,&m); ^