oj.uz

답안 #493313

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
493313 2021-12-10T22:10:16 Z inksamurai Trol (COCI19_trol) C++17
50 / 50
 1 ms 308 KB 
#include <bits/stdc++.h>
#define fi first
#define se second
#define pb push_back
#define sz(a) (int)a.size()
#define all(a) a.begin(),a.end()
#define rep(i,n) for(int i=0;i<n;i++)
#define crep(i,x,n) for(int i=x;i<n;i++)
#define drep(i,n) for(int i=n-1;i>=0;i--)
#define vec(...) vector<__VA_ARGS__>
#define _3cSpNGp ios_base::sync_with_stdio(false),cin.tie(0),cout.tie(0)
using namespace std;
typedef long long ll;
typedef long double ld;
using pii=pair<int,int>;
using vi=vector<int>;

ll f(ll x){
	ll e=x/9;
	ll now=e*45ll;
	ll rem=x%9;
	now+=(rem*(rem+1))/2;
	return now;
}

int main(){
_3cSpNGp;
	int t;
	cin>>t;
	rep(_,t){
		ll l,r;
		cin>>l>>r;
		ll ans=f(r)-f(l-1);
		cout<<ans<<"\n";
	}
//	
	return 0;
}

Subtask #1
50.0 / 50.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 308 KB Output is correct