Submission #974648

#	Time	Username	Problem	Language	Result	Execution time	Memory
974648		12345678	Trol (COCI19_trol)	C++17	50 / 50	1 ms	348 KiB

trol

#include <bits/stdc++.h>

using namespace std;

#define ll long long

ll q, l, r, qs[10];

ll solve(ll x)
{
    return (x/9)*45+qs[x%9];
}

int main()
{
    cin.tie(NULL)->sync_with_stdio(false);
    cin>>q;
    for (int i=1; i<=9; i++) qs[i]=qs[i-1]+i;
    while (q--) cin>>l>>r, cout<<solve(r)-solve(l-1)<<'\n';
}

• Subtask 1: 50 / 50