用%符号就能完全通过但是用&竟然只过了2个，8个过不去

#include<bits/stdc++.h>
using namespace std;
int main(){
	int m,n,sum = 0;
	cin >> m >> n;
	if(m&1 == 0){
		m++;
	}
	for(int i=m;i<=n;i+=2){
		sum += i;
	}
	cout<<sum<<endl;

	return 0;
}