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Submission #289377

# Submission time Handle Problem Language Result Execution time Memory
289377 2020-09-02T15:43:44 Z dolphingarlic Highway Tolls (IOI18_highway) C++14
100 / 100
 300 ms 10836 KB 
#include "highway.h"

#include <bits/stdc++.h>
using namespace std;

vector<pair<int, int>> graph[90000], ord[2];
bool visited[90000];
int ans[2];

void find_pair(int N, vector<int> U, vector<int> V, int A, int B) {
    for (int i = 0; i < N; i++) {
        graph[i].clear();
        visited[i] = false;
    }
    ord[0].clear(); ord[1].clear();

    int M = int(U.size());
    for (int i = 0; i < M; i++) {
        graph[U[i]].push_back({V[i], i});
        graph[V[i]].push_back({U[i], i});
    }

    vector<int> W(M, 0);
    long long path_len = ask(W) / A;

    int l = 0, r = M - 1;
    while (l != r) {
        int mid = (l + r) / 2;
        fill(W.begin(), W.end(), 0);
        for (int i = 0; i <= mid; i++) W[i] = 1;
        long long res = ask(W);
        if (res == path_len * A) l = mid + 1;
        else r = mid;
    }
    int m_edge = l, uu = U[l], vv = V[l];

    visited[uu] = visited[vv] = true;
    queue<pair<int, int>> q;
    q.push({uu, 0}); q.push({vv, 1});
    ord[0].push_back({uu, -1}); ord[1].push_back({vv, -1});
    while (q.size()) {
        int curr, sub;
        tie(curr, sub) = q.front();
        q.pop();
        for (pair<int, int> i : graph[curr]) {
            if (!visited[i.first] && i.second > m_edge) {
                visited[i.first] = true;
                ord[sub].push_back(i);
                q.push({i.first, sub});
            }
        }
    }

    for (int s = 0; s < 2; s++) {
        l = 0, r = ord[s].size() - 1;
        while (l != r) {
            int mid = (l + r) / 2;
 
            fill(W.begin(), W.end(), 1);
            W[m_edge] = 0;
            for (pair<int, int> i : ord[1 - s]) if (i.second != -1) W[i.second] = 0;
            for (int i = 1; i <= mid; i++) W[ord[s][i].second] = 0;
 
            long long dist = ask(W);
            if (dist == path_len * A) r = mid;
            else l = mid + 1;
        }
        ans[s] = ord[s][l].first;
    }

    answer(ans[0], ans[1]);
}

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 2432 KB Output is correct
2 Correct 2 ms 2432 KB Output is correct
3 Correct 2 ms 2432 KB Output is correct
4 Correct 2 ms 2432 KB Output is correct
5 Correct 2 ms 2432 KB Output is correct
6 Correct 2 ms 2432 KB Output is correct
7 Correct 2 ms 2432 KB Output is correct
8 Correct 2 ms 2492 KB Output is correct
9 Correct 2 ms 2432 KB Output is correct
10 Correct 2 ms 2432 KB Output is correct
11 Correct 3 ms 2464 KB Output is correct
12 Correct 2 ms 2496 KB Output is correct

Subtask #2
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 2560 KB Output is correct
2 Correct 15 ms 3196 KB Output is correct
3 Correct 193 ms 8980 KB Output is correct
4 Correct 207 ms 8864 KB Output is correct
5 Correct 203 ms 8868 KB Output is correct
6 Correct 131 ms 8336 KB Output is correct
7 Correct 143 ms 8344 KB Output is correct
8 Correct 142 ms 8852 KB Output is correct
9 Correct 130 ms 8336 KB Output is correct
10 Correct 147 ms 8408 KB Output is correct
11 Correct 131 ms 7392 KB Output is correct
12 Correct 159 ms 7940 KB Output is correct
13 Correct 142 ms 8308 KB Output is correct
14 Correct 181 ms 8424 KB Output is correct

Subtask #3
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 13 ms 3276 KB Output is correct
2 Correct 27 ms 3788 KB Output is correct
3 Correct 37 ms 4040 KB Output is correct
4 Correct 110 ms 7800 KB Output is correct
5 Correct 112 ms 7796 KB Output is correct
6 Correct 134 ms 8296 KB Output is correct
7 Correct 110 ms 7280 KB Output is correct
8 Correct 112 ms 7784 KB Output is correct
9 Correct 110 ms 7560 KB Output is correct

Subtask #4
33.0 / 33.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 2560 KB Output is correct
2 Correct 16 ms 3072 KB Output is correct
3 Correct 107 ms 7688 KB Output is correct
4 Correct 141 ms 8968 KB Output is correct
5 Correct 117 ms 7740 KB Output is correct
6 Correct 132 ms 7728 KB Output is correct
7 Correct 137 ms 8340 KB Output is correct
8 Correct 125 ms 7844 KB Output is correct
9 Correct 203 ms 8868 KB Output is correct
10 Correct 158 ms 8360 KB Output is correct
11 Correct 173 ms 8328 KB Output is correct
12 Correct 161 ms 7900 KB Output is correct
13 Correct 141 ms 7920 KB Output is correct
14 Correct 134 ms 7436 KB Output is correct
15 Correct 145 ms 7776 KB Output is correct
16 Correct 120 ms 7780 KB Output is correct
17 Correct 200 ms 8312 KB Output is correct
18 Correct 150 ms 8340 KB Output is correct
19 Correct 129 ms 7900 KB Output is correct
20 Correct 158 ms 7224 KB Output is correct
21 Correct 181 ms 8840 KB Output is correct
22 Correct 112 ms 8340 KB Output is correct
23 Correct 133 ms 9184 KB Output is correct
24 Correct 139 ms 9156 KB Output is correct
25 Correct 159 ms 8516 KB Output is correct

Subtask #5
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 22 ms 3244 KB Output is correct
2 Correct 23 ms 3368 KB Output is correct
3 Correct 233 ms 9304 KB Output is correct
4 Correct 242 ms 9460 KB Output is correct
5 Correct 261 ms 10280 KB Output is correct
6 Correct 221 ms 10404 KB Output is correct
7 Correct 233 ms 10344 KB Output is correct
8 Correct 256 ms 10656 KB Output is correct
9 Correct 184 ms 7944 KB Output is correct
10 Correct 227 ms 8896 KB Output is correct
11 Correct 253 ms 9180 KB Output is correct
12 Correct 227 ms 10176 KB Output is correct
13 Correct 240 ms 10360 KB Output is correct
14 Correct 234 ms 10404 KB Output is correct
15 Correct 284 ms 10772 KB Output is correct
16 Correct 177 ms 9428 KB Output is correct
17 Correct 139 ms 8896 KB Output is correct
18 Correct 173 ms 8400 KB Output is correct
19 Correct 182 ms 9700 KB Output is correct
20 Correct 182 ms 8580 KB Output is correct
21 Correct 209 ms 10812 KB Output is correct

Subtask #6
31.0 / 31.0

# Verdict Execution time Memory Grader output
1 Correct 22 ms 3192 KB Output is correct
2 Correct 20 ms 3320 KB Output is correct
3 Correct 181 ms 9152 KB Output is correct
4 Correct 221 ms 9244 KB Output is correct
5 Correct 185 ms 9444 KB Output is correct
6 Correct 212 ms 10676 KB Output is correct
7 Correct 155 ms 9248 KB Output is correct
8 Correct 230 ms 9568 KB Output is correct
9 Correct 241 ms 9416 KB Output is correct
10 Correct 220 ms 10400 KB Output is correct
11 Correct 218 ms 10488 KB Output is correct
12 Correct 217 ms 10544 KB Output is correct
13 Correct 158 ms 8572 KB Output is correct
14 Correct 160 ms 8584 KB Output is correct
15 Correct 185 ms 9512 KB Output is correct
16 Correct 158 ms 8880 KB Output is correct
17 Correct 178 ms 9172 KB Output is correct
18 Correct 180 ms 8964 KB Output is correct
19 Correct 210 ms 10288 KB Output is correct
20 Correct 216 ms 10796 KB Output is correct
21 Correct 228 ms 10404 KB Output is correct
22 Correct 260 ms 10500 KB Output is correct
23 Correct 236 ms 10620 KB Output is correct
24 Correct 227 ms 10576 KB Output is correct
25 Correct 214 ms 10760 KB Output is correct
26 Correct 213 ms 10716 KB Output is correct
27 Correct 132 ms 8780 KB Output is correct
28 Correct 135 ms 9672 KB Output is correct
29 Correct 123 ms 9828 KB Output is correct
30 Correct 140 ms 9572 KB Output is correct
31 Correct 140 ms 9556 KB Output is correct
32 Correct 134 ms 9440 KB Output is correct
33 Correct 194 ms 9916 KB Output is correct
34 Correct 135 ms 8968 KB Output is correct
35 Correct 140 ms 9044 KB Output is correct
36 Correct 135 ms 9444 KB Output is correct
37 Correct 169 ms 9400 KB Output is correct
38 Correct 159 ms 9688 KB Output is correct
39 Correct 218 ms 10836 KB Output is correct
40 Correct 227 ms 10732 KB Output is correct
41 Correct 300 ms 10708 KB Output is correct
42 Correct 223 ms 10448 KB Output is correct