Submission #493313

#	Time	Username	Problem	Language	Result	Execution time	Memory
493313		inksamurai	Trol (COCI19_trol)	C++17	50 / 50	1 ms	308 KiB

trol

#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 / 50