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답안 #856109

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
856109 2023-10-02T16:45:48 Z vjudge1 Savrsen (COCI17_savrsen) C++17
120 / 120
 812 ms 78696 KB 
//author: Ahmet Alp Orakci
#include <bits/stdc++.h>
using namespace std;
using i64 = long long int;

const int MAXN = 1E7 + 5;

i64 res[MAXN];

void precalc() {
    for(int i = 1; i < MAXN; i++) {
        for(int j = i; j < MAXN; j += i) {
            res[j] += i;
        }
    }
}

#define ONLINE_JUDGE
void solve() {
    int a, b;
    cin >> a >> b;

    i64 ans = 0;
    for(int i = a; i <= b; i++)
        ans += abs(res[i] - 2 * i);

    cout << ans;
    
    return;
}

signed main() {
    #ifndef ONLINE_JUDGE
        freopen(".in", "r", stdin);
        freopen(".out", "w", stdout);
    #endif

    precalc();

    ios_base::sync_with_stdio(false);
    cin.tie(NULL); cout.tie(NULL);

    int t = 1; //cin >> t;
    for(int i = 1; i <= t; i++) {
        solve();
    }

    return 0;
}

Subtask #1
120.0 / 120.0

# 결과 실행 시간 메모리 Grader output
1 Correct 793 ms 78684 KB Output is correct
2 Correct 777 ms 78688 KB Output is correct
3 Correct 805 ms 78680 KB Output is correct
4 Correct 812 ms 78680 KB Output is correct
5 Correct 805 ms 78684 KB Output is correct
6 Correct 803 ms 78684 KB Output is correct
7 Correct 773 ms 78696 KB Output is correct
8 Correct 779 ms 78684 KB Output is correct