Submission #704814

#	Time	Username	Problem	Language	Result	Execution time	Memory
704814		chenyan	Trol (COCI19_trol)	C++17	50 / 50	1 ms	300 KiB

trol

#include<bits/stdc++.h>
using namespace std;
#define int long long
#define pii pair<int,int>
#define ff first
#define ss second
#define all(x) x.begin(),x.end()
#define pb emplace_back
#define N 2010
void solve(){
	int l,r;
	cin>>l>>r;
	int x=0,d=r-l+1;
	while(l>=10){
		while(l)x+=l%10,l/=10;
		swap(x,l);
	}
	int ans=d/9*45;
	for(int i=1;i<=9;i++){
		if(d%9>=i)ans+=(l+i-2)%9+1;
	}
	cout<<ans<<'\n';
}
signed main(){
	ios::sync_with_stdio(0);
	cin.tie(0);
	int q;
	cin>>q;
	while(q--)solve();
}

• Subtask 1: 50 / 50