Submission #976492

#	Time	Username	Problem	Language	Result	Execution time	Memory
976492		vjudge1	Trol (COCI19_trol)	C++17	50 / 50	1 ms	600 KiB

trol

#include<bits/stdc++.h>
#define suhu ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
#define fi first
#define se second
#define pb push_back
using namespace std;
typedef long long ll;
const ll MAXN=2505;
const ll mod=1e9+7;
ll n;
int main(){
	suhu
	cin>>n;
	while(n--){
		ll ans=0;
		ll l,r;cin>>l>>r;
		
		ll a1=r/9*45;
		for(int i=1;i<=r%9;i++){
			a1+=i;
		}
		
		ll a2=(l-1)/9*45;
		for(int i=1;i<=(l-1)%9;i++){
			a2+=i;
		}	
		cout<<a1-a2<<"\n";
	}
	return 0;
}

Compilation message (stderr)

trol.cpp: In function 'int main()':
trol.cpp:15:6: warning: unused variable 'ans' [-Wunused-variable]
   15 |   ll ans=0;
      |      ^~~

• Subtask 1: 50 / 50