Submission #1106000

#	Time	Username	Problem	Language	Result	Execution time	Memory
1106000		dzhoz0	Savrsen (COCI17_savrsen)	C++17	120 / 120	201 ms	39676 KiB

savrsen

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

const int MAXN = 1e7;

int sumFactor[MAXN + 5];

void init() {
    memset(sumFactor, 0, sizeof(sumFactor));
    for (long long p = 1; p * p <= MAXN; p++) {
        sumFactor[p * p] += p;
        for (long long q = p + 1; p * q <= MAXN; q++) sumFactor[p * q] += p + q;
    }
}
signed main()
{
    init();
    int l, r; cin >> l >> r;
    long long res = 0;
    for(int x = l; x <= r; x++) {
        res += abs(2 * x - sumFactor[x]);
    }
    cout << res << '\n';
    return 0;
}

• Subtask 1: 120 / 120