Submission #50279498

Source Code Expand

// LUOGU_RID: 146908211
#include <bits/stdc++.h>
using namespace std; 
const int N = 2e5 + 5; 

int n, V, x[N], v[20], h; 
int L[20][N], R[20][N];
int f[1 << 20], g[1 << 20]; // f 为前缀 g 为 后缀
bitset<N> ans;
bool chk(int x, int y) { return x & (1 << y); }
int chg(int x, int y) { return x ^ (1 << y); }

int main(void) {
    cin >> n >> V;
    for (int i = 1; i <= n; ++i) cin >> x[i]; 
    for (int i = V; i; v[h++] = (i >>= 1)); 
    v[h] = V; 
    for (int i = 0; i <= h; ++i) {
        for (int j = 1; j <= n; ++j)
            if (j == 1 || x[j] - x[j - 1] > v[i]) L[i][j] = j; 
            else L[i][j] = L[i][j - 1]; 
        for (int j = n; j >= 1; --j)
            if (j == n || x[j + 1] - x[j] > v[i]) R[i][j] = j; 
            else R[i][j] = R[i][j + 1]; 
    }

    for (int s = 0; s < 1 << h; ++s) {
        f[s] = 0, g[s] = n + 1; 
        for (int i = 0; i < h; ++i) if (s >> i & 1)
            f[s] = max(f[s], R[i][f[s ^ (1 << i)] + 1]), 
            g[s] = min(g[s], L[i][g[s ^ (1 << i)] - 1]); 
    }

    vector<pair<int, int>> segs;
    for (int i = 1; i <= n; ++i)
        if (L[h][i] == i) segs.emplace_back(i, R[h][i]); 

    if (segs.size() <= h + 1) {
        for (auto p : segs) {
            for (int s = 0; s < 1 << h; ++s) {
                int t = (1 << h) - 1 - s;
                if (f[s] >= p.first - 1 && g[t] <= p.second + 1) {
                    for (int i = p.first; i <= p.second; ++i) ans[i] = 1; 
                    break; 
                }
            }
        }
    }
    for (int i = 1; i <= n; ++i) cout << (ans[i] ? "Possible\n" : "Impossible\n"); 
    return 0; 
}

Submission Info

Submission Time
Task E - Camel and Oases
User james1BadCreeper
Language C++ 17 (gcc 12.2)
Score 1000
Code Size 1624 Byte
Status AC
Exec Time 101 ms
Memory 36140 KiB

Compile Error

Main.cpp: In function ‘int main()’:
Main.cpp:38:21: warning: comparison of integer expressions of different signedness: ‘std::vector<std::pair<int, int> >::size_type’ {aka ‘long unsigned int’} and ‘int’ [-Wsign-compare]
   38 |     if (segs.size() <= h + 1) {
      |         ~~~~~~~~~~~~^~~~~~~~

Judge Result

Set Name Sample All
Score / Max Score 0 / 0 1000 / 1000
Status
AC × 3
AC × 70
Set Name Test Cases
Sample 00_example_01.txt, 00_example_02.txt, 00_example_03.txt
All 00_example_01.txt, 00_example_02.txt, 00_example_03.txt, 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, 65.txt, 66.txt, 67.txt
Case Name Status Exec Time Memory
00_example_01.txt AC 1 ms 3580 KiB
00_example_02.txt AC 1 ms 3516 KiB
00_example_03.txt AC 1 ms 3544 KiB
01.txt AC 21 ms 5896 KiB
02.txt AC 6 ms 4248 KiB
03.txt AC 21 ms 5716 KiB
04.txt AC 6 ms 4192 KiB
05.txt AC 19 ms 5716 KiB
06.txt AC 33 ms 10324 KiB
07.txt AC 12 ms 6712 KiB
08.txt AC 28 ms 8684 KiB
09.txt AC 14 ms 7100 KiB
10.txt AC 23 ms 7236 KiB
11.txt AC 20 ms 8144 KiB
12.txt AC 25 ms 7588 KiB
13.txt AC 97 ms 36084 KiB
14.txt AC 21 ms 5704 KiB
15.txt AC 6 ms 4268 KiB
16.txt AC 21 ms 5716 KiB
17.txt AC 5 ms 4216 KiB
18.txt AC 19 ms 5744 KiB
19.txt AC 11 ms 4592 KiB
20.txt AC 31 ms 9744 KiB
21.txt AC 13 ms 6916 KiB
22.txt AC 30 ms 9236 KiB
23.txt AC 16 ms 7592 KiB
24.txt AC 23 ms 7652 KiB
25.txt AC 19 ms 7684 KiB
26.txt AC 29 ms 9252 KiB
27.txt AC 97 ms 36140 KiB
28.txt AC 32 ms 9516 KiB
29.txt AC 12 ms 6476 KiB
30.txt AC 31 ms 9368 KiB
31.txt AC 17 ms 7004 KiB
32.txt AC 25 ms 7572 KiB
33.txt AC 18 ms 7528 KiB
34.txt AC 28 ms 8456 KiB
35.txt AC 101 ms 36020 KiB
36.txt AC 22 ms 5760 KiB
37.txt AC 6 ms 4264 KiB
38.txt AC 21 ms 5760 KiB
39.txt AC 6 ms 4268 KiB
40.txt AC 19 ms 5708 KiB
41.txt AC 11 ms 4592 KiB
42.txt AC 19 ms 5884 KiB
43.txt AC 11 ms 4652 KiB
44.txt AC 21 ms 5708 KiB
45.txt AC 10 ms 4788 KiB
46.txt AC 11 ms 6388 KiB
47.txt AC 28 ms 8368 KiB
48.txt AC 17 ms 7092 KiB
49.txt AC 25 ms 8348 KiB
50.txt AC 16 ms 6756 KiB
51.txt AC 26 ms 7840 KiB
52.txt AC 16 ms 6812 KiB
53.txt AC 28 ms 8104 KiB
54.txt AC 16 ms 6912 KiB
55.txt AC 28 ms 8656 KiB
56.txt AC 10 ms 6000 KiB
57.txt AC 25 ms 8412 KiB
58.txt AC 17 ms 7088 KiB
59.txt AC 23 ms 7536 KiB
60.txt AC 18 ms 7336 KiB
61.txt AC 27 ms 8372 KiB
62.txt AC 17 ms 7144 KiB
63.txt AC 27 ms 8192 KiB
64.txt AC 17 ms 7240 KiB
65.txt AC 28 ms 8444 KiB
66.txt AC 1 ms 3644 KiB
67.txt AC 1 ms 3560 KiB