oj.uz

답안 #586704

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
586704 2022-06-30T14:41:42 Z TheEvilBird Collecting Stamps 3 (JOI20_ho_t3) C++17
100 / 100
 143 ms 71300 KB 
#include <iostream>
#include <iomanip>
#include <cassert>
#include <vector>
#include <numeric>
#include <string>
#include <bitset>
#include <cmath>
#include <algorithm>
#include <stack>
#include <queue>
#include <deque>
#include <set>
#include <unordered_set>
#include <map>
#include <unordered_map>
#include <random>
#include <ctime>
#include <chrono>

using namespace std;

#define all(x) (x).begin(), (x).end()
#define rall(x) (x).rbegin(), (x).rend()
#define sz(x) (int)((x).size())

typedef unsigned int uint;
typedef long long ll;
typedef unsigned long long ull;
//typedef __int128_t int128;
typedef long double ld;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;

const char en = '\n';
const int INF = 1e9 + 7;
const ll INFLL = 1e18;

mt19937 rnd(chrono::high_resolution_clock::now().time_since_epoch().count());

void solve() {
    int n, L;
    cin >> n >> L;
    vector<ll> x(n + 1, 0), t(n + 1, -1);
    for (int i = 1; i <= n; ++i) {
        cin >> x[i];
    }
    for (int i = 1; i <= n; ++i) {
        cin >> t[i];
    }
    int ans = 0;
    vector<vector<vector<vector<int>>>> dp(n + 3,
                                           vector<vector<vector<int>>> (n + 3,
                                                                        vector<vector<int>> (2,
                                                                                             vector<int> (n + 3, INF))));

    auto get_time = [&](int i, int j) {
        i %= (n + 1);
        j %= (n + 1);
        ll dist = abs(x[i] - x[j]);
        return min(dist, L - dist);
    };

    dp[0][0][0][0] = dp[0][0][1][0] = 0;
    for (int len = 0; len <= n; ++len) {
        for (int pref = 0; pref <= len; ++pref) {
            int suf = len - pref;
            for (int k = 0; k <= n; ++k) {
                if (k == 1 && (dp[pref][suf][0][k] != INF || dp[pref][suf][1][k] != INF)) {
                    int kek = 0;
                }
                if (dp[pref][suf][0][k] != INF) {
                    int a = pref;
                    int go1 = a + 1, go2 = n + 1 - suf - 1;
                    if (1 <= go1 && go1 <= n && go1 != a) {
                        ll time = get_time(a, go1);
                        if (time + dp[pref][suf][0][k] <= t[go1] &&
                            time + dp[pref][suf][0][k] < dp[pref + 1][suf][0][k + 1]) {
                            dp[pref + 1][suf][0][k + 1] = time + dp[pref][suf][0][k];
                        } else if (time + dp[pref][suf][0][k] < dp[pref + 1][suf][0][k]) {
                            dp[pref + 1][suf][0][k] = time + dp[pref][suf][0][k];
                        }
                    }
                    if (1 <= go2 && go2 <= n && go2 != a) {
                        ll time = get_time(a, go2);
                        if (time + dp[pref][suf][0][k] <= t[go2] &&
                            time + dp[pref][suf][0][k] < dp[pref][suf + 1][1][k + 1]) {
                            dp[pref][suf + 1][1][k + 1] = time + dp[pref][suf][0][k];
                        } else if (time + dp[pref][suf][0][k] < dp[pref][suf + 1][1][k]) {
                            dp[pref][suf + 1][1][k] = time + dp[pref][suf][0][k];
                        }
                    }
                }
                if (dp[pref][suf][1][k] != INF) {
                    int a = (n + 1 - suf) % (n + 1);
                    int go1 = (a == 0 ? n : a - 1), go2 = pref + 1;
                    if (1 <= go1 && go1 <= n && go1 != a) {
                        ll time = get_time(a, go1);
                        if (time + dp[pref][suf][1][k] <= t[go1] &&
                            time + dp[pref][suf][1][k] < dp[pref][suf + 1][1][k + 1]) {
                            dp[pref][suf + 1][1][k + 1] = time + dp[pref][suf][1][k];
                        } else if (time + dp[pref][suf][1][k] < dp[pref][suf + 1][1][k]) {
                            dp[pref][suf + 1][1][k] = time + dp[pref][suf][1][k];
                        }
                    }
                    if (1 <= go2 && go2 <= n && go2 != a) {
                        ll time = get_time(a, go2);
                        if (time + dp[pref][suf][1][k] <= t[go2] &&
                            time + dp[pref][suf][1][k] < dp[pref + 1][suf][0][k + 1]) {
                            dp[pref + 1][suf][0][k + 1] = time + dp[pref][suf][1][k];
                        } else if (time + dp[pref][suf][1][k] < dp[pref + 1][suf][0][k]) {
                            dp[pref + 1][suf][0][k] = time + dp[pref][suf][1][k];
                        }
                    }
                }
            }
        }
    }
    for (int i = 0; i <= n; ++i) {
        for (int j = 0; j <= n; ++j) {
            for (int k = 0; k <= 1; ++k) {
                for (int cnt = 0; cnt <= n; ++cnt) {
                    if (i + j <= n && dp[i][j][k][cnt] != INF) {
//                        cerr << i << ' ' << j << ' ' << k << ' ' << cnt << endl;
                        ans = max(ans, cnt);
                    }
                }
            }
        }
    }
    cout << ans << en;
}

int main() {
#ifdef __APPLE__
    freopen("input.txt", "r", stdin);
#else
    ios_base::sync_with_stdio(0);
    cin.tie(0);
#endif
    solve();
    return 0;
}

Compilation message

ho_t3.cpp: In function 'void solve()':
ho_t3.cpp:70:25: warning: unused variable 'kek' [-Wunused-variable]
   70 |                     int kek = 0;
      |                         ^~~

Subtask #1
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 256 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 1 ms 340 KB Output is correct

Subtask #2
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 256 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 1 ms 340 KB Output is correct
18 Correct 1 ms 340 KB Output is correct
19 Correct 1 ms 324 KB Output is correct
20 Correct 1 ms 340 KB Output is correct
21 Correct 1 ms 340 KB Output is correct
22 Correct 1 ms 340 KB Output is correct
23 Correct 1 ms 340 KB Output is correct
24 Correct 1 ms 340 KB Output is correct
25 Correct 1 ms 340 KB Output is correct
26 Correct 1 ms 340 KB Output is correct
27 Correct 1 ms 340 KB Output is correct
28 Correct 1 ms 340 KB Output is correct
29 Correct 1 ms 324 KB Output is correct
30 Correct 1 ms 340 KB Output is correct
31 Correct 1 ms 340 KB Output is correct
32 Correct 1 ms 324 KB Output is correct
33 Correct 1 ms 340 KB Output is correct
34 Correct 1 ms 328 KB Output is correct
35 Correct 1 ms 340 KB Output is correct

Subtask #3
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 256 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 1 ms 340 KB Output is correct
18 Correct 101 ms 51152 KB Output is correct
19 Correct 46 ms 24952 KB Output is correct
20 Correct 18 ms 10452 KB Output is correct
21 Correct 48 ms 22956 KB Output is correct
22 Correct 63 ms 33516 KB Output is correct
23 Correct 15 ms 8404 KB Output is correct
24 Correct 8 ms 5880 KB Output is correct
25 Correct 16 ms 8148 KB Output is correct
26 Correct 3 ms 2372 KB Output is correct
27 Correct 17 ms 8584 KB Output is correct
28 Correct 7 ms 5332 KB Output is correct
29 Correct 15 ms 8660 KB Output is correct
30 Correct 8 ms 6484 KB Output is correct
31 Correct 15 ms 8160 KB Output is correct
32 Correct 6 ms 3412 KB Output is correct
33 Correct 16 ms 8148 KB Output is correct
34 Correct 3 ms 2132 KB Output is correct
35 Correct 10 ms 7764 KB Output is correct
36 Correct 5 ms 2900 KB Output is correct
37 Correct 15 ms 8584 KB Output is correct
38 Correct 7 ms 3796 KB Output is correct
39 Correct 11 ms 9244 KB Output is correct
40 Correct 6 ms 4436 KB Output is correct
41 Correct 130 ms 69328 KB Output is correct
42 Correct 44 ms 39080 KB Output is correct
43 Correct 131 ms 69324 KB Output is correct
44 Correct 39 ms 38604 KB Output is correct
45 Correct 138 ms 69328 KB Output is correct
46 Correct 39 ms 39124 KB Output is correct

Subtask #4
75.0 / 75.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 256 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 1 ms 340 KB Output is correct
18 Correct 1 ms 340 KB Output is correct
19 Correct 1 ms 324 KB Output is correct
20 Correct 1 ms 340 KB Output is correct
21 Correct 1 ms 340 KB Output is correct
22 Correct 1 ms 340 KB Output is correct
23 Correct 1 ms 340 KB Output is correct
24 Correct 1 ms 340 KB Output is correct
25 Correct 1 ms 340 KB Output is correct
26 Correct 1 ms 340 KB Output is correct
27 Correct 1 ms 340 KB Output is correct
28 Correct 1 ms 340 KB Output is correct
29 Correct 1 ms 324 KB Output is correct
30 Correct 1 ms 340 KB Output is correct
31 Correct 1 ms 340 KB Output is correct
32 Correct 1 ms 324 KB Output is correct
33 Correct 1 ms 340 KB Output is correct
34 Correct 1 ms 328 KB Output is correct
35 Correct 1 ms 340 KB Output is correct
36 Correct 101 ms 51152 KB Output is correct
37 Correct 46 ms 24952 KB Output is correct
38 Correct 18 ms 10452 KB Output is correct
39 Correct 48 ms 22956 KB Output is correct
40 Correct 63 ms 33516 KB Output is correct
41 Correct 15 ms 8404 KB Output is correct
42 Correct 8 ms 5880 KB Output is correct
43 Correct 16 ms 8148 KB Output is correct
44 Correct 3 ms 2372 KB Output is correct
45 Correct 17 ms 8584 KB Output is correct
46 Correct 7 ms 5332 KB Output is correct
47 Correct 15 ms 8660 KB Output is correct
48 Correct 8 ms 6484 KB Output is correct
49 Correct 15 ms 8160 KB Output is correct
50 Correct 6 ms 3412 KB Output is correct
51 Correct 16 ms 8148 KB Output is correct
52 Correct 3 ms 2132 KB Output is correct
53 Correct 10 ms 7764 KB Output is correct
54 Correct 5 ms 2900 KB Output is correct
55 Correct 15 ms 8584 KB Output is correct
56 Correct 7 ms 3796 KB Output is correct
57 Correct 11 ms 9244 KB Output is correct
58 Correct 6 ms 4436 KB Output is correct
59 Correct 130 ms 69328 KB Output is correct
60 Correct 44 ms 39080 KB Output is correct
61 Correct 131 ms 69324 KB Output is correct
62 Correct 39 ms 38604 KB Output is correct
63 Correct 138 ms 69328 KB Output is correct
64 Correct 39 ms 39124 KB Output is correct
65 Correct 59 ms 60360 KB Output is correct
66 Correct 57 ms 53340 KB Output is correct
67 Correct 50 ms 50012 KB Output is correct
68 Correct 46 ms 44348 KB Output is correct
69 Correct 68 ms 59740 KB Output is correct
70 Correct 74 ms 56184 KB Output is correct
71 Correct 55 ms 56784 KB Output is correct
72 Correct 72 ms 57384 KB Output is correct
73 Correct 56 ms 51140 KB Output is correct
74 Correct 61 ms 46796 KB Output is correct
75 Correct 49 ms 53836 KB Output is correct
76 Correct 143 ms 65392 KB Output is correct
77 Correct 61 ms 65396 KB Output is correct
78 Correct 82 ms 44900 KB Output is correct
79 Correct 46 ms 47324 KB Output is correct
80 Correct 116 ms 64092 KB Output is correct
81 Correct 46 ms 47952 KB Output is correct
82 Correct 73 ms 52772 KB Output is correct
83 Correct 65 ms 69336 KB Output is correct
84 Correct 84 ms 56184 KB Output is correct
85 Correct 82 ms 63444 KB Output is correct
86 Correct 89 ms 60992 KB Output is correct
87 Correct 56 ms 53920 KB Output is correct
88 Correct 89 ms 71252 KB Output is correct
89 Correct 68 ms 71300 KB Output is correct
90 Correct 49 ms 54484 KB Output is correct
91 Correct 88 ms 71292 KB Output is correct
92 Correct 69 ms 71260 KB Output is correct
93 Correct 61 ms 68580 KB Output is correct