Submission #1569557


Source Code Expand

#include <iostream>
#include <algorithm>
#include <vector>
#include <queue>
#include <map>
#include <unordered_map>
#include <set>
using namespace std;
#define MOD 1000000007

int main(){
    cin.tie(0);
    ios::sync_with_stdio(false);
    int N;
    long long A, B;
    cin >> N >> A >> B;
    vector<long long> S(N+1);
    S[0] = -(1LL << 60);
    for(int i=1; i<=N; i++) cin >> S[i];
    if(A > B) swap(A, B);
    for(int i=2; i<=N; i++)
        if(S[i] - S[i-2] < A){
            cout << 0 << endl;
            return 0;
        }

    vector<long long> dp1(N+1, 0), dp2(N+1, 0);
    dp1[0] = 1;
    dp2[0] = 1;
    int cur = 0;
    int tail = 0;
    for(int i=1; i<=N; i++){
        for(int j=cur; j<i; j++){
            if(S[i] - S[j] >= B){
                cur = j;
            }else break;
        }

        if(S[i] - S[i-1] < A){
            dp2[i-1] = dp1[i-1];
            int id = min(i-2, cur);
            if(tail <= id) dp1[i] = dp2[id];
            tail = i-1;
        }else if(tail <= cur){
            dp1[i] = dp2[cur];
        }
        dp2[i] = (dp2[i-1] + dp1[i]) % MOD;
    }

    long long ans = 0;
    for(int i=tail; i<=N; i++){
        ans += dp1[i] % MOD;
        ans %= MOD;
    }
    cout << ans << endl;
    return 0;
}

Submission Info

Submission Time
Task C - Division into Two
User suzume
Language C++14 (GCC 5.4.1)
Score 1100
Code Size 1308 Byte
Status AC
Exec Time 18 ms
Memory 2688 KB

Judge Result

Set Name Sample All
Score / Max Score 0 / 0 1100 / 1100
Status
AC × 4
AC × 68
Set Name Test Cases
Sample s1.txt, s2.txt, s3.txt, s4.txt
All 01.txt, 02.txt, 03.txt, 04.txt, 05.txt, 06.txt, 07.txt, 08.txt, 09.txt, 10.txt, 11.txt, 12.txt, 13.txt, 14.txt, 15.txt, 16.txt, 17.txt, 18.txt, 19.txt, 20.txt, 21.txt, 22.txt, 23.txt, 24.txt, 25.txt, 26.txt, 27.txt, 28.txt, 29.txt, 30.txt, 31.txt, 32.txt, 33.txt, 34.txt, 35.txt, 36.txt, 37.txt, 38.txt, 39.txt, 40.txt, 41.txt, 42.txt, 43.txt, 44.txt, 45.txt, 46.txt, 47.txt, 48.txt, 49.txt, 50.txt, 51.txt, 52.txt, 53.txt, 54.txt, 55.txt, 56.txt, 57.txt, 58.txt, 59.txt, 60.txt, 61.txt, 62.txt, 63.txt, 64.txt, s1.txt, s2.txt, s3.txt, s4.txt
Case Name Status Exec Time Memory
01.txt AC 18 ms 2560 KB
02.txt AC 16 ms 2560 KB
03.txt AC 17 ms 2560 KB
04.txt AC 16 ms 2560 KB
05.txt AC 16 ms 2560 KB
06.txt AC 16 ms 2560 KB
07.txt AC 17 ms 2560 KB
08.txt AC 17 ms 2560 KB
09.txt AC 17 ms 2560 KB
10.txt AC 17 ms 2560 KB
11.txt AC 16 ms 2560 KB
12.txt AC 17 ms 2560 KB
13.txt AC 17 ms 2560 KB
14.txt AC 17 ms 2560 KB
15.txt AC 16 ms 2560 KB
16.txt AC 10 ms 2560 KB
17.txt AC 12 ms 2560 KB
18.txt AC 14 ms 2560 KB
19.txt AC 12 ms 2560 KB
20.txt AC 13 ms 2688 KB
21.txt AC 12 ms 2560 KB
22.txt AC 13 ms 2560 KB
23.txt AC 11 ms 2560 KB
24.txt AC 12 ms 2560 KB
25.txt AC 15 ms 2560 KB
26.txt AC 14 ms 2560 KB
27.txt AC 15 ms 2560 KB
28.txt AC 15 ms 2560 KB
29.txt AC 14 ms 2560 KB
30.txt AC 14 ms 2560 KB
31.txt AC 13 ms 2560 KB
32.txt AC 14 ms 2560 KB
33.txt AC 15 ms 2560 KB
34.txt AC 12 ms 2560 KB
35.txt AC 15 ms 2560 KB
36.txt AC 10 ms 2560 KB
37.txt AC 11 ms 2560 KB
38.txt AC 11 ms 2560 KB
39.txt AC 17 ms 2560 KB
40.txt AC 10 ms 2560 KB
41.txt AC 11 ms 2560 KB
42.txt AC 9 ms 1024 KB
43.txt AC 17 ms 2560 KB
44.txt AC 17 ms 2560 KB
45.txt AC 17 ms 2560 KB
46.txt AC 17 ms 2560 KB
47.txt AC 15 ms 1024 KB
48.txt AC 15 ms 1024 KB
49.txt AC 1 ms 256 KB
50.txt AC 1 ms 256 KB
51.txt AC 1 ms 256 KB
52.txt AC 1 ms 256 KB
53.txt AC 1 ms 256 KB
54.txt AC 1 ms 256 KB
55.txt AC 1 ms 256 KB
56.txt AC 1 ms 256 KB
57.txt AC 1 ms 256 KB
58.txt AC 1 ms 256 KB
59.txt AC 1 ms 256 KB
60.txt AC 1 ms 256 KB
61.txt AC 1 ms 256 KB
62.txt AC 1 ms 256 KB
63.txt AC 1 ms 256 KB
64.txt AC 1 ms 256 KB
s1.txt AC 1 ms 256 KB
s2.txt AC 1 ms 256 KB
s3.txt AC 1 ms 256 KB
s4.txt AC 1 ms 256 KB