Submission #1236665

#	Time	Username	Problem	Language	Result	Execution time	Memory
1236665		overwatch9	Savrsen (COCI17_savrsen)	C++20	120 / 120	928 ms	78692 KiB

savrsen

#include <bits/stdc++.h>
using namespace std;
using ll = long long;
int main() {
    int a, b;
    cin >> a >> b;
    vector <ll> sum(b+1);
    for (int i = 2; i <= b; i++) {
        for (int j = i+i; j <= b; j += i)
            sum[j] += i;
        sum[i]++;
    }
    ll ans = 0;
    for (int i = a; i <= b; i++)
        ans += abs(i - sum[i]);
    cout << ans << '\n';
}

• Subtask 1: 120 / 120