Compilare: main.cpp: In function 'int main()': main.cpp:39:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0 ; i < prime.size() ; i++) ~~^~~~~~~~~~~~~~ main.cpp:49:32: warning: format '%d' expects argument of type 'int', but argument 2 has type 'std::size_t {aka long unsigned int}' [-Wformat=] printf("%d",b-a+1-d.count()); ^ main.cpp:38:9: warning: unused variable 'sum' [-Wunused-variable] int sum = 0; ^~~ main.cpp:33:33: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("nasa.in","r",stdin); ^ main.cpp:34:35: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("nasa.out","w",stdout); ^ main.cpp:36:24: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&a,&b); ^