Submission #1257858

#	Time	Username	Problem	Language	Result	Execution time	Memory
1257858		arnaa	Trol (COCI19_trol)	C++20	50 / 50	0 ms	328 KiB

trol

#include<bits/stdc++.h>
using namespace std;
long long digit(long long x){
	if(x<=0) return 0;
	long long jum = x / 9;
	long long ans = x % 9;
	return jum * 45 + ( ans * ( ans + 1 )) /2;
}
int main(){
	int q;
	long long l,r;
	cin>>q;
	for(int i=1;i<=q;i++){
		cin>>l>>r;
		long long ans= digit(r) - digit(l-1);
		cout<<ans<<endl;
	}
	
}

• Subtask 1: 50 / 50