Submission #2151810


Source Code Expand

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

const int N = 100005;
const int mod = 1e9 + 7;

int n, x[N];
int cnt[N];

int main() {
    ios_base::sync_with_stdio(false); cin.tie(0);
    cin >> n;
    for (int i = 1; i <= n; ++i) cin >> x[i];

    int cannot = 0;
    for (int i = 1; i <= n; ++i) {
        cnt[cannot]++;
        // update cannot
        if (x[i] < 2 * (i - cannot) - 1) ++cannot;
    }

    int cur = 0;
    int res = 1;
    for (int i = 0; i < n; ++i) {
        cur += cnt[i];
        res = 1LL * res * (cur - i) % mod;
    }

    cout << res << endl;
}

Submission Info

Submission Time
Task A - Robot Racing
User cheater2k
Language C++14 (GCC 5.4.1)
Score 900
Code Size 602 Byte
Status AC
Exec Time 12 ms
Memory 896 KB

Judge Result

Set Name Sample Subtask All
Score / Max Score 0 / 0 500 / 500 400 / 400
Status
AC × 4
AC × 14
AC × 28
Set Name Test Cases
Sample 0_00.txt, 0_01.txt, 0_02.txt, 0_03.txt
Subtask 0_00.txt, 0_01.txt, 0_02.txt, 1_00.txt, 1_01.txt, 1_02.txt, 1_03.txt, 1_04.txt, 1_05.txt, 1_06.txt, 1_07.txt, 1_08.txt, 1_09.txt, 1_10.txt
All 0_00.txt, 0_01.txt, 0_02.txt, 0_03.txt, 1_00.txt, 1_01.txt, 1_02.txt, 1_03.txt, 1_04.txt, 1_05.txt, 1_06.txt, 1_07.txt, 1_08.txt, 1_09.txt, 1_10.txt, 2_00.txt, 2_01.txt, 2_02.txt, 2_03.txt, 2_04.txt, 2_05.txt, 2_06.txt, 2_07.txt, 2_08.txt, 2_09.txt, 2_10.txt, 2_11.txt, 2_12.txt
Case Name Status Exec Time Memory
0_00.txt AC 1 ms 256 KB
0_01.txt AC 1 ms 256 KB
0_02.txt AC 1 ms 256 KB
0_03.txt AC 1 ms 256 KB
1_00.txt AC 1 ms 256 KB
1_01.txt AC 1 ms 256 KB
1_02.txt AC 1 ms 256 KB
1_03.txt AC 1 ms 256 KB
1_04.txt AC 1 ms 256 KB
1_05.txt AC 1 ms 256 KB
1_06.txt AC 1 ms 256 KB
1_07.txt AC 1 ms 256 KB
1_08.txt AC 1 ms 256 KB
1_09.txt AC 1 ms 256 KB
1_10.txt AC 1 ms 256 KB
2_00.txt AC 10 ms 896 KB
2_01.txt AC 10 ms 640 KB
2_02.txt AC 12 ms 640 KB
2_03.txt AC 10 ms 768 KB
2_04.txt AC 10 ms 768 KB
2_05.txt AC 10 ms 640 KB
2_06.txt AC 10 ms 640 KB
2_07.txt AC 10 ms 640 KB
2_08.txt AC 10 ms 640 KB
2_09.txt AC 10 ms 640 KB
2_10.txt AC 10 ms 640 KB
2_11.txt AC 12 ms 640 KB
2_12.txt AC 12 ms 640 KB