Submission #976352

#	Time	Username	Problem	Language	Result	Execution time	Memory
976352		vjudge1	Trol (COCI19_trol)	C++17	50 / 50	1 ms	348 KiB

trol

#include<bits/stdc++.h>
#define int long long
using namespace std;

void solve() {
	int l,r; cin >> l >> r;
	int ans=0;
	//dua kasus karena aku tolol
	//kasus 1;
	if(r<=l+(9-l%9)) {
		int begin=l%9;
		if (begin==0) ans+=9;
		for(int i=l;i<=r;i++){
			ans+=begin;
			begin++;
		}
	}
	else {
		int fir=l+10-l%9;
		int las=r-r%9;
		ans+=(las-fir+1)*5;
		for(int i=fir-1;i>=l;i--) {
			ans+=i%9;
			if(i%9==0) ans+=9;
		}
		for(int i=las+1;i<=r;i++) {
			ans+=i%9;
			if(i%9==0) ans+=9;
		}
	}
	cout<<ans<<endl;
}

signed main () {
	int tc; cin>>tc;
	while(tc--) solve();
}

• Subtask 1: 50 / 50