Submission #1259851

#	Time	Username	Problem	Language	Result	Execution time	Memory
1259851		khaerulmamu	Trol (COCI19_trol)	C++20	50 / 50	0 ms	328 KiB

trol

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


int main (){
    int Q;
    cin >> Q;
    while (Q--){
        ll l ,r;
        cin >> l >> r;
        ll dif = r-l+1;
        int a;
        if(l%9==0)a=9;
        else a= l%9;
        ll ans=0;
        while(a<=9 && dif>0){
            ans+=a;
            a++;
            dif--;
        }

        if(dif/9 > 0){
            ans+=45*(dif/9);
        }
        int tambahan = dif - 9*(dif/9);
        for(int i=1; i<=tambahan; i++){
            ans +=i;
        }
        cout << ans << endl;
    }
}

• Subtask 1: 50 / 50