Submission #908586

#	Time	Username	Problem	Language	Result	Execution time	Memory
908586		andro	Savrsen (COCI17_savrsen)	C++14	120 / 120	1234 ms	78932 KiB

savrsen

#include <bits/stdc++.h>

#define int long long

using namespace std;

const int N = 1e7 + 5;

vector<int> divs(N);

signed main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    for(int i = 1; i < N; i++) {
        for(int j = i + i; j < N; j+=i) {
            divs[j] += i;
        }
    }
    int l, r;
    cin >> l >> r;
    int ans = 0;
    for(int i = l; i <= r; i++) {
        ans += abs(i - divs[i]);
    }
    cout << ans << "\n";
}

• Subtask 1: 120 / 120