Compilare: user.cpp: In function ‘int main()’: user.cpp:19:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("diamant.in","r",stdin); ^ user.cpp:20:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("diamant.out","w",stdout); ^ user.cpp:21:29: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d",&n,&m,&x); ^ user.cpp:35:30: warning: iteration 87720u invokes undefined behavior [-Waggressive-loop-optimizations] ki[j+ob[i]]+=k1[j]; ^ user.cpp:34:9: note: containing loop for(int j=500;j<2*V+N+500;j++){ ^ user.cpp:33:24: warning: iteration 87720u invokes undefined behavior [-Waggressive-loop-optimizations] k1[j]=ki[j]; ^ user.cpp:32:9: note: containing loop for(int j=500;j<2*V+N+500;j++) ^