Submission #313609

#	Time	Username	Problem	Language	Result	Execution time	Memory
313609		YJU	Trol (COCI19_trol)	C++14	50 / 50	1 ms	384 KiB

trol

#include<bits/stdc++.h>
#pragma GCC optimize("unroll-loops,no-stack-protector")
using namespace std;
typedef long long ll;
typedef long double ld;
typedef pair<ll,ll> pll;
const ll MOD=1e9+7;
const ll MOD2=998244353;
const ll N=2e5+5;
const ld pi=3.14159265359;
const ll INF=(1LL<<60);
#define SQ(i) ((i)*(i))
#define REP(i,n) for(ll i=0;i<n;i++)
#define REP1(i,n) for(ll i=1;i<=n;i++)
#define pb push_back
#define mp make_pair
#define X first
#define Y second
#define setp setprecision
#define lwb lower_bound
#define SZ(_a) (ll)_a.size()

ll cal(ll k){
	ll tmp=0;
	REP1(i,9){
		tmp+=(k/9+(k%9>=i?1:0))*i;
	}
	return tmp;
}

ll Q,l,r;

int main(){
	ios_base::sync_with_stdio(0);cin.tie(0);
	cin>>Q;
	while(Q--){
		cin>>l>>r;
		cout<<cal(r)-cal(l-1)<<"\n";
	}
	return 0;
}

• Subtask 1: 50 / 50