Compilare: user.cpp: In function ‘int main()’: user.cpp:35:30: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("bila.in","r",stdin); ^ user.cpp:36:32: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("bila.out","w",stdout); ^ user.cpp:40:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&n,&m); ^ user.cpp:43:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&a[i][j]); ^ user.cpp: In function ‘int dp(int, int)’: user.cpp:28:16: warning: ‘ny’ may be used uninitialized in this function [-Wmaybe-uninitialized] res=dp(nx,ny); ^ user.cpp:28:16: warning: ‘nx’ may be used uninitialized in this function [-Wmaybe-uninitialized]