标签:family int out return tmp tco soft include code
#include<bits/stdc++.h>
using namespace std;
int main(){
long long a,b;
cin>>a>>b;
a--;
long long tmp=a;
if(tmp&1)
tmp=0;
long long tot=a;
if(tot%4==1||tot%4==2)
tot=1;
else
tot=0;
long long tt=tmp+tot;
long long ttmp=b;
if(ttmp&1)
ttmp=0;
long long ttot=b;
if(ttot%4==1||ttot%4==2)
ttot=1;
else
ttot=0;
long long ttt=ttmp+ttot;
long long ans=tt^ttt;
cout<<ans;
return 0;
}
/* f(1, n) = f(0, n) =
n n % 4 == 0
1 n % 4 == 1
n +1 n % 4 == 2
0 n % 4 == 3
f(a,b)=f(1,b)^f(1,a-1)*/
Atcoder Beginner Contest 121D(异或公式)
标签:family int out return tmp tco soft include code
原文地址:https://www.cnblogs.com/ldudxy/p/10508087.html