求助

#include<iostream>
using namespace std;
bool pd_long_long(long long max_a_b,long long min_a_b){
   if(max_a_b<=2147483647&&min_a_b>=−2147483648){
      return false;
   }else{
      return true;
   }
}
int main(){
   int x1,x2,y1,y2;
   cin>>x1>>x2>>y1>>y2;
   long long min_a_b=x1*y1,max_a_b=x2*y2;
   bool f1,f2;
   if(!pd_long_long(max_a_b,min_a_b)){
      cout<<"int";
   }else{
      cout<<"long long int";
   }
   return 0;
}