oj.uz

Submission #205605

# Submission time Handle Problem Language Result Execution time Memory
205605 2020-02-29T09:51:06 Z mayhoubsaleh Trol (COCI19_trol) C++14
50 / 50
 6 ms 376 KB 
#include <bits/stdc++.h>
#define pb push_back
#define ll long long
#define mid (l+r)/2
#define left 2*i+1
#define righ 2*i+2

using namespace std;
ll q;
ll l,r;

ll sum(ll x){
    ll ret=(x/9)*45;
    x%=9;
    ret+=x*(x+1)/2;
    return ret;
}
int main()
{
    cin>>q;
    while(q--){
        cin>>l>>r;
        cout<<sum(r)-sum(l-1)<<endl;
    }
    return 0;
}

Subtask #1
50.0 / 50.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 256 KB Output is correct
2 Correct 5 ms 256 KB Output is correct
3 Correct 5 ms 376 KB Output is correct
4 Correct 5 ms 256 KB Output is correct
5 Correct 6 ms 256 KB Output is correct