oj.uz

Submission #820019

# Submission time Handle Problem Language Result Execution time Memory
820019 2023-08-10T17:44:04 Z Jarif_Rahman Highway Tolls (IOI18_highway) C++17
100 / 100
 178 ms 12484 KB 
#include "highway.h"
#include <bits/stdc++.h>
#define pb push_back
#define f first
#define sc second
using namespace std;
typedef long long int ll;
typedef string str;
 
int n, m;
ll A, B;
vector<vector<pair<int, int>>> graph;
 
void find_pair(int _n, vector<int> U, vector<int> V, int _A, int _B){
    swap(n, _n);
    m = U.size();
    A = _A, B = _B;
    graph.resize(n);
 
    for(int i = 0; i < m; i++){
        graph[U[i]].pb({V[i], i});
        graph[V[i]].pb({U[i], i});
    }
 
    ll def = ask(vector<int>(m, 0));
 
    int a = 0, b = m-1;
    while(a < b){
        int md = (a+b)/2;
        vector<int> w(m, 0);
        for(int i = 0; i <= md; i++) w[i] = 1;
        ll x = ask(w);
        if(x > def) b = md;
        else a = md+1;
    }

    int e = a;
    int u = U[e], v = V[e];

    vector<int> disu(n, -1);
    vector<int> pu(n, -1), wu(m, 1);
    queue<int> Q;
    disu[u] = 0;
    Q.push(u);
    disu[v] = 1;
    pu[v] = e;
    wu[e] = 0;
    Q.push(v);
    while(!Q.empty()){
        int nd = Q.front(); Q.pop();
        for(auto [x, i]: graph[nd]) if(disu[x] == -1){
            disu[x] = disu[nd]+1;
            pu[x] = i;
            wu[i] = 0;
            Q.push(x);
        }
    }

    vector<int> disv(n, -1);
    vector<int> pv(n, -1), wv(m, 1);
    disv[v] = 0;
    Q.push(v);
    disv[u] = 1;
    pv[u] = e;
    wv[e] = 0;
    Q.push(u);
    while(!Q.empty()){
        int nd = Q.front(); Q.pop();
        for(auto [x, i]: graph[nd]) if(disv[x] == -1){
            disv[x] = disv[nd]+1;
            pv[x] = i;
            wv[i] = 0;
            Q.push(x);
        }
    }

    vector<int> unodes, vnodes;
    for(int i = 0; i < n; i++){
        if(disu[i] == disv[i]) continue;
        if(disu[i] < disv[i]) unodes.pb(i);
        else vnodes.pb(i);
    }

    sort(unodes.begin(), unodes.end(), [&](int x, int y){
        return disu[x] > disu[y];
    });
    sort(vnodes.begin(), vnodes.end(), [&](int x, int y){
        return disv[x] > disv[y];
    });

    int s, t;

    a = 0, b = int(unodes.size())-1;
    while(a < b){
        int md = (a+b)/2;
        vector<int> w = wu;
        for(int i = 0; i <= md; i++) if(pu[unodes[i]] != -1) w[pu[unodes[i]]] = 1;
        ll x = ask(w);
        if(x > def) b = md;
        else a = md+1;
    }
    s = unodes[a];

    a = 0, b = int(vnodes.size())-1;
    while(a < b){
        int md = (a+b)/2;
        vector<int> w = wv;
        for(int i = 0; i <= md; i++) if(pv[vnodes[i]] != -1) w[pv[vnodes[i]]] = 1;
        ll x = ask(w);
        if(x > def) b = md;
        else a = md+1;
    }
    t = vnodes[a];

    answer(s, t);
}

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 208 KB Output is correct
2 Correct 1 ms 208 KB Output is correct
3 Correct 1 ms 208 KB Output is correct
4 Correct 1 ms 208 KB Output is correct
5 Correct 1 ms 208 KB Output is correct
6 Correct 1 ms 300 KB Output is correct
7 Correct 1 ms 208 KB Output is correct
8 Correct 0 ms 208 KB Output is correct
9 Correct 0 ms 208 KB Output is correct
10 Correct 0 ms 208 KB Output is correct
11 Correct 1 ms 208 KB Output is correct
12 Correct 0 ms 208 KB Output is correct

Subtask #2
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 380 KB Output is correct
2 Correct 8 ms 1360 KB Output is correct
3 Correct 80 ms 10212 KB Output is correct
4 Correct 102 ms 10208 KB Output is correct
5 Correct 118 ms 10212 KB Output is correct
6 Correct 86 ms 10200 KB Output is correct
7 Correct 82 ms 10204 KB Output is correct
8 Correct 78 ms 10212 KB Output is correct
9 Correct 75 ms 10212 KB Output is correct
10 Correct 81 ms 10204 KB Output is correct
11 Correct 126 ms 9812 KB Output is correct
12 Correct 112 ms 9648 KB Output is correct
13 Correct 102 ms 9692 KB Output is correct
14 Correct 86 ms 9596 KB Output is correct

Subtask #3
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 1272 KB Output is correct
2 Correct 14 ms 2396 KB Output is correct
3 Correct 26 ms 3364 KB Output is correct
4 Correct 84 ms 9724 KB Output is correct
5 Correct 65 ms 9724 KB Output is correct
6 Correct 62 ms 9624 KB Output is correct
7 Correct 72 ms 9616 KB Output is correct
8 Correct 101 ms 9720 KB Output is correct
9 Correct 63 ms 9632 KB Output is correct

Subtask #4
33.0 / 33.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 336 KB Output is correct
2 Correct 11 ms 1360 KB Output is correct
3 Correct 55 ms 8108 KB Output is correct
4 Correct 96 ms 10208 KB Output is correct
5 Correct 119 ms 10208 KB Output is correct
6 Correct 99 ms 10228 KB Output is correct
7 Correct 99 ms 10208 KB Output is correct
8 Correct 104 ms 10184 KB Output is correct
9 Correct 82 ms 10180 KB Output is correct
10 Correct 106 ms 10204 KB Output is correct
11 Correct 104 ms 9616 KB Output is correct
12 Correct 104 ms 9564 KB Output is correct
13 Correct 107 ms 9796 KB Output is correct
14 Correct 88 ms 9692 KB Output is correct
15 Correct 71 ms 10200 KB Output is correct
16 Correct 90 ms 10220 KB Output is correct
17 Correct 95 ms 9608 KB Output is correct
18 Correct 119 ms 9760 KB Output is correct
19 Correct 92 ms 10212 KB Output is correct
20 Correct 114 ms 9592 KB Output is correct
21 Correct 99 ms 10908 KB Output is correct
22 Correct 98 ms 10808 KB Output is correct
23 Correct 110 ms 10692 KB Output is correct
24 Correct 75 ms 10484 KB Output is correct
25 Correct 110 ms 9700 KB Output is correct

Subtask #5
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 14 ms 1392 KB Output is correct
2 Correct 26 ms 1492 KB Output is correct
3 Correct 127 ms 10572 KB Output is correct
4 Correct 100 ms 11252 KB Output is correct
5 Correct 176 ms 12180 KB Output is correct
6 Correct 124 ms 12288 KB Output is correct
7 Correct 147 ms 12248 KB Output is correct
8 Correct 140 ms 12280 KB Output is correct
9 Correct 147 ms 8320 KB Output is correct
10 Correct 127 ms 8540 KB Output is correct
11 Correct 100 ms 9632 KB Output is correct
12 Correct 116 ms 11144 KB Output is correct
13 Correct 121 ms 11844 KB Output is correct
14 Correct 126 ms 12328 KB Output is correct
15 Correct 132 ms 12296 KB Output is correct
16 Correct 160 ms 9440 KB Output is correct
17 Correct 71 ms 10576 KB Output is correct
18 Correct 82 ms 10776 KB Output is correct
19 Correct 100 ms 10684 KB Output is correct
20 Correct 103 ms 10792 KB Output is correct
21 Correct 172 ms 12224 KB Output is correct

Subtask #6
31.0 / 31.0

# Verdict Execution time Memory Grader output
1 Correct 14 ms 1408 KB Output is correct
2 Correct 10 ms 1492 KB Output is correct
3 Correct 158 ms 10740 KB Output is correct
4 Correct 115 ms 10864 KB Output is correct
5 Correct 104 ms 11184 KB Output is correct
6 Correct 121 ms 12464 KB Output is correct
7 Correct 126 ms 10620 KB Output is correct
8 Correct 104 ms 10784 KB Output is correct
9 Correct 151 ms 11280 KB Output is correct
10 Correct 178 ms 12484 KB Output is correct
11 Correct 119 ms 12428 KB Output is correct
12 Correct 122 ms 12280 KB Output is correct
13 Correct 124 ms 9440 KB Output is correct
14 Correct 84 ms 8540 KB Output is correct
15 Correct 142 ms 9444 KB Output is correct
16 Correct 125 ms 8560 KB Output is correct
17 Correct 108 ms 9436 KB Output is correct
18 Correct 87 ms 8628 KB Output is correct
19 Correct 176 ms 11236 KB Output is correct
20 Correct 115 ms 11792 KB Output is correct
21 Correct 172 ms 12352 KB Output is correct
22 Correct 160 ms 12304 KB Output is correct
23 Correct 130 ms 12432 KB Output is correct
24 Correct 124 ms 12316 KB Output is correct
25 Correct 136 ms 12252 KB Output is correct
26 Correct 157 ms 12320 KB Output is correct
27 Correct 78 ms 10732 KB Output is correct
28 Correct 114 ms 10620 KB Output is correct
29 Correct 82 ms 11008 KB Output is correct
30 Correct 79 ms 10752 KB Output is correct
31 Correct 85 ms 10676 KB Output is correct
32 Correct 99 ms 10604 KB Output is correct
33 Correct 93 ms 10856 KB Output is correct
34 Correct 98 ms 10716 KB Output is correct
35 Correct 84 ms 10668 KB Output is correct
36 Correct 102 ms 10580 KB Output is correct
37 Correct 93 ms 10796 KB Output is correct
38 Correct 106 ms 10772 KB Output is correct
39 Correct 165 ms 12384 KB Output is correct
40 Correct 175 ms 12276 KB Output is correct
41 Correct 118 ms 12136 KB Output is correct
42 Correct 144 ms 12364 KB Output is correct