Advertisement
Not a member of Pastebin yet?
Sign Up,
it unlocks many cool features!
- #include <iostream>
- #include<bits/stdc++.h>
- #define ll long long
- #define ull unsigned long long
- using namespace std;
- ll sum(int n){
- return (n * (n + 1)) / 2;
- }
- ll summation(ll x, ll y ){
- return sum(y) - sum(x - 1);
- }
- ll sum_even(ll x , ll y){
- return (sum(y / 2) - sum((x - 1) / 2)) * 2;
- }
- ll sum_odd(ll x, ll y ){
- return summation(x,y) - sum_even(x,y);
- }
- int main() {
- ios_base::sync_with_stdio(false); cin.tie(nullptr); cout.tie(nullptr);
- ll a,b;
- cin>>a>>b;
- ll x= min(a,b);
- ll y= max(a,b);
- cout<<summation(x,y)<<"\n";
- cout<<sum_even(x,y)<<"\n";
- cout<<sum_odd(x,y)<<"\n";
- return 0;
- }
Advertisement
Add Comment
Please, Sign In to add comment
Advertisement
