Submission #1474242


Source Code Expand

#include <iostream>
#include <cstring>
#include <cmath>
#include <algorithm>
#include <cstdio>
#include <fstream>
#include <map>
#include <vector>
//#include <unordered_map>
//#include <unordered_set>
#include <stack>
#include <set>
#include <queue>
#include <list>

using namespace std;
long long mod=1e9+7;
long long k[100005];
int f[100005];
int main()
{
    int n,z;
    scanf("%d",&n);
    for(int i=1;i<=n;++i)
        scanf("%d",&f[i]);
    f[1]=1;
    if(f[2]>2) f[2]=3;
    k[1]=1;
    k[2]=2;
    for(int i=3;i<=n;++i)
    {
        if(f[i]>f[i-1]+1) f[i]=f[i-1]+2;
        k[i]=(k[i-1]*(i-(2*(i-1)-f[i-1])/2))%mod;
    }
    cout<<k[n]<<endl;
    return 0;
}

Submission Info

Submission Time
Task A - Robot Racing
User vjudge1
Language C++14 (Clang 3.8.0)
Score 900
Code Size 670 Byte
Status AC
Exec Time 15 ms
Memory 1536 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 13 ms 1408 KB
2_01.txt AC 13 ms 1408 KB
2_02.txt AC 15 ms 1408 KB
2_03.txt AC 13 ms 1408 KB
2_04.txt AC 13 ms 1408 KB
2_05.txt AC 13 ms 1536 KB
2_06.txt AC 13 ms 1408 KB
2_07.txt AC 13 ms 1408 KB
2_08.txt AC 13 ms 1408 KB
2_09.txt AC 13 ms 1408 KB
2_10.txt AC 13 ms 1408 KB
2_11.txt AC 14 ms 1408 KB
2_12.txt AC 14 ms 1408 KB