Compilare: main.cpp: In function 'int main()': main.cpp:159:29: warning: format '%d' expects argument of type 'int', but argument 2 has type 'std::vector<long long int>::size_type {aka long unsigned int}' [-Wformat=] printf("%d\n",rez.size()/2); ^ main.cpp:160:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<rez.size();i++) ~^~~~~~~~~~~ main.cpp:56:35: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("armonica.in","r",stdin); ^ main.cpp:57:37: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("armonica.out","w",stdout); ^ main.cpp:58:19: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%lld",&b); ^