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답안 #761010

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
761010 2023-06-19T02:37:34 Z drdilyor 메기 농장 (IOI22_fish) C++17
100 / 100
 354 ms 92040 KB 
#include <bits/stdc++.h>
#include "fish.h"
using namespace std;
using ll = long long;
constexpr ll infl = 2e18;
#define int ll

ll max_weights(
    int32_t n, int32_t m, vector<int32_t> x, vector<int32_t> y, vector<int32_t> w) {
    vector pref(n+1, vector<pair<int,ll>>());
    for (int i = 0; i < m; i++) {
        pref[x[i]+1].emplace_back(y[i], w[i]);
    }
    for (int i = 0; i <= n; i++) {
        sort(pref[i].begin(), pref[i].end());
        for (int j = 1; j < (int)pref[i].size(); j++) {
            pref[i][j].second += pref[i][j-1].second;
            assert(pref[i][j].first != pref[i][j-1].first);
        }
    }

    auto sum_right = [&](int c, int right)->ll{
        int l = -1, r = pref[c].size();
        ll ans = 0;
        while (l < r-1) {
            int mid = (l+r) / 2;
            if (pref[c][mid].first<= right) {
                l = mid, ans = pref[c][mid].second;
            } else r = mid;
        }
        return ans;
    };

    auto sum = [&](int c, int l, int r) { // [l, r]
        if (l <= r) return sum_right(c, r) - sum_right(c, l-1);
        else return 0ll;
    };

    vector<vector<int>> byx(n+2), used(n+1);
    for (int i = 0; i < m; i++)
        byx[x[i]+1].push_back(y[i]);
    for (int i = 0; i <= n; i++) {
        if (i) for (int j : byx[i-1])
            used[i].push_back(j+1);
        if (n-i) for (int j : byx[i+1])
            used[i].push_back(j+1);
        used[i].push_back(0);
        sort(used[i].begin(), used[i].end());
    }


    vector memo(2, vector(n+1, vector<ll>()));
    for (int i = 1; i <= n; i++) {
        memo[0][i].assign(used[i-1].size(), -1);
        memo[1][i].assign(used[i-1].size(), -1);
    }
    
    vector memp(2, vector(n+1, vector<ll>{}));

    auto dp = [&](auto& dp, bool inc, int c, int h2_key)->ll{
        if (c == n+1) return 0;
        int h2 = used[c-1][h2_key];
        ll& res = memo[inc][c][h2_key];
        if (res!=-1) return res;
        res = 0;
        if (inc) {
            if (memp[inc][c].empty()) {
                memp[inc][c].resize(used[c].size());
                ll mx = -infl;
                for (int j = (int)used[c].size()-1; j >= 0; j--) {
                    int h3 = used[c][j];
                    ll val = sum(c-1, 0, h3-1);
                    mx = max(mx, val + max(
                                dp(dp, true, c+1, j),
                                dp(dp, false, c+1, j)));
                    memp[inc][c][j] = mx;
                }
            }
            int start = lower_bound(used[c].begin(), used[c].end(), h2) - used[c].begin();
            ll off = -sum(c-1, 0, h2-1);
            for (int j = start; j < (int)used[c].size(); j++) {
                res = max(res, memp[inc][c][j] + off);
                break;
            }
        } else {
            if (memp[inc][c].empty()) {
                memp[inc][c].resize(used[c].size());
                ll mx = -infl;
                for (int j = 0; j < (int)used[c].size(); j++) {
                    int h3 = used[c][j];
                    ll val = -sum(c, 0, h3-1);
                    mx = max(mx, val + dp(dp, false, c+1, j));
                    memp[inc][c][j] = mx;
                }
            }
            int finish = upper_bound(used[c].begin(), used[c].end(), h2) - used[c].begin();
            ll off = sum(c, 0, h2-1);
            for (int j = finish-1; j >= 0; j--) {
                res = max(res, memp[inc][c][j] + off);
                break;
            }
        }
        res = max(res, dp(dp, true, c+1, 0));
        res = max(res, 0ll);
        return res;
    };
    ll res = dp(dp, true, 1, 0);
    return res;

}

Subtask #1
3.0 / 3.0

# 결과 실행 시간 메모리 Grader output
1 Correct 91 ms 52028 KB Output is correct
2 Correct 105 ms 59172 KB Output is correct
3 Correct 47 ms 46364 KB Output is correct
4 Correct 45 ms 46372 KB Output is correct
5 Correct 268 ms 89036 KB Output is correct
6 Correct 251 ms 92040 KB Output is correct

Subtask #2
6.0 / 6.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 183 ms 63468 KB Output is correct
3 Correct 232 ms 72620 KB Output is correct
4 Correct 89 ms 52100 KB Output is correct
5 Correct 108 ms 59120 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 0 ms 224 KB Output is correct
10 Correct 46 ms 46376 KB Output is correct
11 Correct 46 ms 46372 KB Output is correct
12 Correct 100 ms 52732 KB Output is correct
13 Correct 116 ms 59884 KB Output is correct
14 Correct 100 ms 52448 KB Output is correct
15 Correct 123 ms 58380 KB Output is correct
16 Correct 98 ms 52608 KB Output is correct
17 Correct 109 ms 58412 KB Output is correct

Subtask #3
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 47 ms 46368 KB Output is correct
2 Correct 47 ms 46380 KB Output is correct
3 Correct 86 ms 48180 KB Output is correct
4 Correct 71 ms 50628 KB Output is correct
5 Correct 112 ms 58288 KB Output is correct
6 Correct 109 ms 57620 KB Output is correct
7 Correct 114 ms 58120 KB Output is correct
8 Correct 122 ms 58416 KB Output is correct

Subtask #4
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 0 ms 284 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 2 ms 724 KB Output is correct
11 Correct 1 ms 468 KB Output is correct
12 Correct 1 ms 596 KB Output is correct
13 Correct 0 ms 340 KB Output is correct
14 Correct 1 ms 468 KB Output is correct

Subtask #5
21.0 / 21.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 0 ms 284 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 2 ms 724 KB Output is correct
11 Correct 1 ms 468 KB Output is correct
12 Correct 1 ms 596 KB Output is correct
13 Correct 0 ms 340 KB Output is correct
14 Correct 1 ms 468 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 2 ms 596 KB Output is correct
17 Correct 43 ms 6300 KB Output is correct
18 Correct 44 ms 7588 KB Output is correct
19 Correct 36 ms 7376 KB Output is correct
20 Correct 35 ms 7352 KB Output is correct
21 Correct 34 ms 7300 KB Output is correct
22 Correct 81 ms 14328 KB Output is correct
23 Correct 8 ms 1660 KB Output is correct
24 Correct 26 ms 4424 KB Output is correct
25 Correct 1 ms 468 KB Output is correct
26 Correct 7 ms 1492 KB Output is correct

Subtask #6
17.0 / 17.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 0 ms 284 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 2 ms 724 KB Output is correct
11 Correct 1 ms 468 KB Output is correct
12 Correct 1 ms 596 KB Output is correct
13 Correct 0 ms 340 KB Output is correct
14 Correct 1 ms 468 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 2 ms 596 KB Output is correct
17 Correct 43 ms 6300 KB Output is correct
18 Correct 44 ms 7588 KB Output is correct
19 Correct 36 ms 7376 KB Output is correct
20 Correct 35 ms 7352 KB Output is correct
21 Correct 34 ms 7300 KB Output is correct
22 Correct 81 ms 14328 KB Output is correct
23 Correct 8 ms 1660 KB Output is correct
24 Correct 26 ms 4424 KB Output is correct
25 Correct 1 ms 468 KB Output is correct
26 Correct 7 ms 1492 KB Output is correct
27 Correct 3 ms 1876 KB Output is correct
28 Correct 216 ms 32332 KB Output is correct
29 Correct 287 ms 43100 KB Output is correct
30 Correct 260 ms 42720 KB Output is correct
31 Correct 265 ms 42720 KB Output is correct
32 Correct 290 ms 45820 KB Output is correct
33 Correct 266 ms 43044 KB Output is correct
34 Correct 267 ms 42740 KB Output is correct
35 Correct 98 ms 18504 KB Output is correct
36 Correct 282 ms 46412 KB Output is correct

Subtask #7
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 47 ms 46368 KB Output is correct
2 Correct 47 ms 46380 KB Output is correct
3 Correct 86 ms 48180 KB Output is correct
4 Correct 71 ms 50628 KB Output is correct
5 Correct 112 ms 58288 KB Output is correct
6 Correct 109 ms 57620 KB Output is correct
7 Correct 114 ms 58120 KB Output is correct
8 Correct 122 ms 58416 KB Output is correct
9 Correct 111 ms 57980 KB Output is correct
10 Correct 83 ms 36836 KB Output is correct
11 Correct 171 ms 73608 KB Output is correct
12 Correct 1 ms 212 KB Output is correct
13 Correct 1 ms 212 KB Output is correct
14 Correct 1 ms 212 KB Output is correct
15 Correct 0 ms 212 KB Output is correct
16 Correct 1 ms 212 KB Output is correct
17 Correct 1 ms 212 KB Output is correct
18 Correct 45 ms 46464 KB Output is correct
19 Correct 47 ms 46460 KB Output is correct
20 Correct 46 ms 46396 KB Output is correct
21 Correct 46 ms 46348 KB Output is correct
22 Correct 125 ms 58964 KB Output is correct
23 Correct 184 ms 73740 KB Output is correct
24 Correct 178 ms 73592 KB Output is correct

Subtask #8
16.0 / 16.0

# 결과 실행 시간 메모리 Grader output
1 Correct 91 ms 52028 KB Output is correct
2 Correct 105 ms 59172 KB Output is correct
3 Correct 47 ms 46364 KB Output is correct
4 Correct 45 ms 46372 KB Output is correct
5 Correct 268 ms 89036 KB Output is correct
6 Correct 251 ms 92040 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 183 ms 63468 KB Output is correct
9 Correct 232 ms 72620 KB Output is correct
10 Correct 89 ms 52100 KB Output is correct
11 Correct 108 ms 59120 KB Output is correct
12 Correct 1 ms 212 KB Output is correct
13 Correct 1 ms 212 KB Output is correct
14 Correct 1 ms 212 KB Output is correct
15 Correct 0 ms 224 KB Output is correct
16 Correct 46 ms 46376 KB Output is correct
17 Correct 46 ms 46372 KB Output is correct
18 Correct 100 ms 52732 KB Output is correct
19 Correct 116 ms 59884 KB Output is correct
20 Correct 100 ms 52448 KB Output is correct
21 Correct 123 ms 58380 KB Output is correct
22 Correct 98 ms 52608 KB Output is correct
23 Correct 109 ms 58412 KB Output is correct
24 Correct 47 ms 46368 KB Output is correct
25 Correct 47 ms 46380 KB Output is correct
26 Correct 86 ms 48180 KB Output is correct
27 Correct 71 ms 50628 KB Output is correct
28 Correct 112 ms 58288 KB Output is correct
29 Correct 109 ms 57620 KB Output is correct
30 Correct 114 ms 58120 KB Output is correct
31 Correct 122 ms 58416 KB Output is correct
32 Correct 1 ms 212 KB Output is correct
33 Correct 0 ms 212 KB Output is correct
34 Correct 0 ms 212 KB Output is correct
35 Correct 0 ms 212 KB Output is correct
36 Correct 0 ms 284 KB Output is correct
37 Correct 0 ms 212 KB Output is correct
38 Correct 0 ms 212 KB Output is correct
39 Correct 0 ms 212 KB Output is correct
40 Correct 1 ms 340 KB Output is correct
41 Correct 2 ms 724 KB Output is correct
42 Correct 1 ms 468 KB Output is correct
43 Correct 1 ms 596 KB Output is correct
44 Correct 0 ms 340 KB Output is correct
45 Correct 1 ms 468 KB Output is correct
46 Correct 1 ms 340 KB Output is correct
47 Correct 2 ms 596 KB Output is correct
48 Correct 43 ms 6300 KB Output is correct
49 Correct 44 ms 7588 KB Output is correct
50 Correct 36 ms 7376 KB Output is correct
51 Correct 35 ms 7352 KB Output is correct
52 Correct 34 ms 7300 KB Output is correct
53 Correct 81 ms 14328 KB Output is correct
54 Correct 8 ms 1660 KB Output is correct
55 Correct 26 ms 4424 KB Output is correct
56 Correct 1 ms 468 KB Output is correct
57 Correct 7 ms 1492 KB Output is correct
58 Correct 3 ms 1876 KB Output is correct
59 Correct 216 ms 32332 KB Output is correct
60 Correct 287 ms 43100 KB Output is correct
61 Correct 260 ms 42720 KB Output is correct
62 Correct 265 ms 42720 KB Output is correct
63 Correct 290 ms 45820 KB Output is correct
64 Correct 266 ms 43044 KB Output is correct
65 Correct 267 ms 42740 KB Output is correct
66 Correct 98 ms 18504 KB Output is correct
67 Correct 282 ms 46412 KB Output is correct
68 Correct 111 ms 57980 KB Output is correct
69 Correct 83 ms 36836 KB Output is correct
70 Correct 171 ms 73608 KB Output is correct
71 Correct 1 ms 212 KB Output is correct
72 Correct 1 ms 212 KB Output is correct
73 Correct 1 ms 212 KB Output is correct
74 Correct 0 ms 212 KB Output is correct
75 Correct 1 ms 212 KB Output is correct
76 Correct 1 ms 212 KB Output is correct
77 Correct 45 ms 46464 KB Output is correct
78 Correct 47 ms 46460 KB Output is correct
79 Correct 46 ms 46396 KB Output is correct
80 Correct 46 ms 46348 KB Output is correct
81 Correct 125 ms 58964 KB Output is correct
82 Correct 184 ms 73740 KB Output is correct
83 Correct 178 ms 73592 KB Output is correct
84 Correct 341 ms 81176 KB Output is correct
85 Correct 354 ms 85344 KB Output is correct
86 Correct 298 ms 80652 KB Output is correct
87 Correct 312 ms 85176 KB Output is correct
88 Correct 0 ms 212 KB Output is correct
89 Correct 303 ms 85184 KB Output is correct
90 Correct 295 ms 87236 KB Output is correct
91 Correct 327 ms 88124 KB Output is correct