Submission #976414

#	Time	Username	Problem	Language	Result	Execution time	Memory
976414		vjudge1	Star triangles (IZhO11_triangle)	C++17	0 / 100	1 ms	604 KiB

triangle

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;

int main()
{
    int q;
    cin >> q;
    
    while (q--) {
    	ll l, r;
    	cin >> l >> r;
    	int ans = 0;
    	
    	
    	ll selisih = (r-l)/9;
    	int sisa = (r-l)%9;
    	int hah = l%9;
    	
    	for (int i=hah;i<=8+hah;i++) {
    		ans += i*selisih;
		}
    	
		for (int i=hah;i<=(hah)+sisa;i++) {
			ans += i;
		}
			
    	cout << ans << endl;
	}
    
    
    
    
    return 0;
}

• Subtask 1: 0 / 100