Compilare: main.cpp: In function 'int main()': main.cpp:7:35: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("ratphu.in","r",stdin); ^ main.cpp:8:37: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("ratphu.out","w",stdout); ^ main.cpp:11:34: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(stdin,"%lld %d",&n,&p); ^ main.cpp:18:16: warning: iteration 19 invokes undefined behavior [-Waggressive-loop-optimizations] rest[i]=i%p; ~~~~~~~^~~~ main.cpp:17:18: note: within this loop for(int i=1;i<=300;++i) { ~^~~~~