题目描述

blablabla

样例

#include<iostream>
using namespace std;
int main() {
    int x, y;
    int sum = 0;
    cin >> x >> y;
    if(x > y)
    {
        int t=y;
        y=x;
        x=t;
    }
    for(int i=x+1;i<y;i++) 
    {
        if(i%2==1 || i%2==-1 ) 
            sum+=i;
    }
    cout<<sum<<endl;
    return 0;
}