範例程式碼 uva10327

//uva10327
#include<iostream>
#include<vector>
using namespace std;
int main(){
  int n;
  while(cin>>n){
  	vector<int>a(n);for(auto&v:a)cin>>v;
  	int ans=0;
    for(int i=0;i<n;i++){
      for(int j=i;j<n;j++){
      	ans+=(a[i]>a[j]);
      }
  	}
		cout<<"Minimum exchange operations : "<<ans<<endl;
	}
  return 0;
}