Submission #5849100

Source Code Expand

import java.util.*;

public class Main {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int m = sc.nextInt();

        List<Integer> holeList  = new ArrayList<>();

        for (int i = 0; i < m; i++){
            holeList.add(sc.nextInt());
        }

        long count = 0;
        long countOneBefore = 1;
        long countTwoBefore = 0;

        int holeIndex = 0;
        int holeStair = 0;
        if (holeList.size() != 0){
            holeStair = holeList.get(holeIndex);
        }

        for (int i = 0 ; i < n; i++){

            if (holeStair == (i + 1)){
                // 穴が開いている場合
                count = 0;
                countTwoBefore = countOneBefore;
                countOneBefore = count;

                holeIndex += 1;
                holeStair = holeList.get(Math.min(holeIndex, m - 1));
            }else {
                count = countOneBefore + countTwoBefore;
                if (count >= 1000000007L){
                    count = count % 1000000007L;
                }
                countTwoBefore = countOneBefore;
                countOneBefore = count;
            }
        }

        System.out.println(count);
    }

}

Submission Info

Submission Time
Task C - Typical Stairs
User alkwest
Language Java8 (OpenJDK 1.8.0)
Score 300
Code Size 1311 Byte
Status AC
Exec Time 436 ms
Memory 59400 KiB

Judge Result

Set Name Sample All
Score / Max Score 0 / 0 300 / 300
Status
AC × 3
AC × 36
Set Name Test Cases
Sample s1.txt, s2.txt, s3.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, s1.txt, s2.txt, s3.txt
Case Name Status Exec Time Memory
01.txt AC 95 ms 19028 KiB
02.txt AC 96 ms 19924 KiB
03.txt AC 95 ms 21716 KiB
04.txt AC 96 ms 22608 KiB
05.txt AC 97 ms 19540 KiB
06.txt AC 96 ms 18644 KiB
07.txt AC 96 ms 19796 KiB
08.txt AC 95 ms 18900 KiB
09.txt AC 96 ms 21844 KiB
10.txt AC 96 ms 19156 KiB
11.txt AC 95 ms 18644 KiB
12.txt AC 98 ms 19284 KiB
13.txt AC 94 ms 19796 KiB
14.txt AC 96 ms 21844 KiB
15.txt AC 96 ms 21716 KiB
16.txt AC 405 ms 46372 KiB
17.txt AC 162 ms 27852 KiB
18.txt AC 253 ms 38564 KiB
19.txt AC 243 ms 35732 KiB
20.txt AC 117 ms 21204 KiB
21.txt AC 250 ms 40088 KiB
22.txt AC 115 ms 21716 KiB
23.txt AC 257 ms 39264 KiB
24.txt AC 194 ms 30236 KiB
25.txt AC 192 ms 27448 KiB
26.txt AC 111 ms 20560 KiB
27.txt AC 139 ms 24020 KiB
28.txt AC 436 ms 59400 KiB
29.txt AC 347 ms 48836 KiB
30.txt AC 150 ms 25580 KiB
31.txt AC 253 ms 38576 KiB
32.txt AC 314 ms 42824 KiB
33.txt AC 351 ms 46176 KiB
s1.txt AC 95 ms 21844 KiB
s2.txt AC 96 ms 19796 KiB
s3.txt AC 96 ms 20948 KiB