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Submission #978712

# Submission time Handle Problem Language Result Execution time Memory
978712 2024-05-09T14:25:42 Z bachhoangxuan Highway Tolls (IOI18_highway) C++17
100 / 100
 209 ms 11820 KB 
#include "highway.h"
#include<bits/stdc++.h>
using namespace std;
const int maxn = 1e5+5;
#define ll long long
#define pii pair<int,int>
#define fi first
#define se second

int dd[2][maxn];
vector<pii> edge[maxn];

void find_pair(int N, std::vector<int> U, std::vector<int> V, int A, int B) {
    vector<int> S(2,0),T(2,0);
    int M=(int)U.size();
    for(int i=0;i<M;i++){
        edge[U[i]].push_back({V[i],i});
        edge[V[i]].push_back({U[i],i});
    }

    vector<int> w(M,0);
    ll dist=ask(w);
    int l=1,r=M;
    while(l<r){
        int mid=(l+r)>>1;
        w.assign(M,0);
        for(int i=0;i<mid;i++) w[i]=1;
        if(ask(w)!=dist) r=mid;
        else l=mid+1;
    }
    S[0]=U[l-1],S[1]=V[l-1];
    //cout << S[0] << ' ' << S[1] << '\n';
    for(int i=0;i<=1;i++){
        queue<int> qq;
        for(int u=0;u<N;u++) dd[i][u]=-1;
        dd[i][S[i]]=0;qq.push(S[i]);
        while(!qq.empty()){
            int u=qq.front();qq.pop();
            for(auto [v,id]:edge[u]) if(dd[i][v]==-1){
                dd[i][v]=dd[i][u]+1;
                qq.push(v);
            }
        }
    }
    vector<vector<int>> cc(2);
    for(int u=0;u<N;u++){
        if(dd[0][u]<dd[1][u]) cc[0].push_back(u);
        else if(dd[0][u]>dd[1][u]) cc[1].push_back(u);
    }

    for(int i=0;i<=1;i++){
        sort(cc[i].begin(),cc[i].end(),[&](int x,int y){
            return dd[i][x]>dd[i][y];
        });
        //for(int x:cc[i]) cout << x << ' ';
        //cout << '\n';
        T[i]=cc[i].back();
        l=0,r=(int)cc[i].size()-2;
        while(l<=r){
            int mid=(l+r)>>1;
            w.assign(M,0);
            for(int j=0;j<=mid;j++) for(auto [v,id]:edge[cc[i][j]]) w[id]=1;
            if(ask(w)!=dist) T[i]=cc[i][mid],r=mid-1;
            else l=mid+1;
        }
    }
    answer(T[0],T[1]);
}

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2796 KB Output is correct
2 Correct 1 ms 2804 KB Output is correct
3 Correct 1 ms 2796 KB Output is correct
4 Correct 2 ms 2796 KB Output is correct
5 Correct 1 ms 2800 KB Output is correct
6 Correct 1 ms 2800 KB Output is correct
7 Correct 2 ms 2800 KB Output is correct
8 Correct 1 ms 2800 KB Output is correct
9 Correct 1 ms 2796 KB Output is correct
10 Correct 1 ms 2804 KB Output is correct
11 Correct 1 ms 2648 KB Output is correct
12 Correct 1 ms 2792 KB Output is correct

Subtask #2
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2856 KB Output is correct
2 Correct 11 ms 3556 KB Output is correct
3 Correct 116 ms 9624 KB Output is correct
4 Correct 112 ms 9396 KB Output is correct
5 Correct 105 ms 9380 KB Output is correct
6 Correct 135 ms 9376 KB Output is correct
7 Correct 132 ms 9868 KB Output is correct
8 Correct 151 ms 9368 KB Output is correct
9 Correct 124 ms 9624 KB Output is correct
10 Correct 109 ms 9636 KB Output is correct
11 Correct 119 ms 9592 KB Output is correct
12 Correct 126 ms 9040 KB Output is correct
13 Correct 150 ms 9256 KB Output is correct
14 Correct 118 ms 8768 KB Output is correct

Subtask #3
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 12 ms 3496 KB Output is correct
2 Correct 23 ms 4096 KB Output is correct
3 Correct 29 ms 4944 KB Output is correct
4 Correct 73 ms 8564 KB Output is correct
5 Correct 88 ms 8560 KB Output is correct
6 Correct 114 ms 8904 KB Output is correct
7 Correct 79 ms 8756 KB Output is correct
8 Correct 76 ms 9048 KB Output is correct
9 Correct 115 ms 8648 KB Output is correct

Subtask #4
33.0 / 33.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2852 KB Output is correct
2 Correct 17 ms 3532 KB Output is correct
3 Correct 120 ms 8244 KB Output is correct
4 Correct 110 ms 9364 KB Output is correct
5 Correct 104 ms 9140 KB Output is correct
6 Correct 133 ms 9384 KB Output is correct
7 Correct 118 ms 9140 KB Output is correct
8 Correct 104 ms 9360 KB Output is correct
9 Correct 157 ms 9376 KB Output is correct
10 Correct 124 ms 9608 KB Output is correct
11 Correct 127 ms 9028 KB Output is correct
12 Correct 151 ms 8988 KB Output is correct
13 Correct 114 ms 8812 KB Output is correct
14 Correct 140 ms 9236 KB Output is correct
15 Correct 106 ms 9388 KB Output is correct
16 Correct 100 ms 9152 KB Output is correct
17 Correct 120 ms 8748 KB Output is correct
18 Correct 109 ms 8800 KB Output is correct
19 Correct 150 ms 9524 KB Output is correct
20 Correct 144 ms 8992 KB Output is correct
21 Correct 80 ms 9892 KB Output is correct
22 Correct 84 ms 9892 KB Output is correct
23 Correct 124 ms 10596 KB Output is correct
24 Correct 87 ms 9884 KB Output is correct
25 Correct 118 ms 8836 KB Output is correct

Subtask #5
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 11 ms 3436 KB Output is correct
2 Correct 13 ms 3660 KB Output is correct
3 Correct 132 ms 9968 KB Output is correct
4 Correct 185 ms 10412 KB Output is correct
5 Correct 157 ms 11032 KB Output is correct
6 Correct 166 ms 11192 KB Output is correct
7 Correct 171 ms 11668 KB Output is correct
8 Correct 145 ms 11324 KB Output is correct
9 Correct 115 ms 9368 KB Output is correct
10 Correct 134 ms 9400 KB Output is correct
11 Correct 101 ms 10156 KB Output is correct
12 Correct 199 ms 11088 KB Output is correct
13 Correct 202 ms 11092 KB Output is correct
14 Correct 177 ms 11508 KB Output is correct
15 Correct 192 ms 11012 KB Output is correct
16 Correct 136 ms 9896 KB Output is correct
17 Correct 102 ms 9596 KB Output is correct
18 Correct 128 ms 10060 KB Output is correct
19 Correct 111 ms 9504 KB Output is correct
20 Correct 115 ms 9788 KB Output is correct
21 Correct 200 ms 11084 KB Output is correct

Subtask #6
31.0 / 31.0

# Verdict Execution time Memory Grader output
1 Correct 13 ms 3416 KB Output is correct
2 Correct 13 ms 3616 KB Output is correct
3 Correct 149 ms 10000 KB Output is correct
4 Correct 166 ms 10624 KB Output is correct
5 Correct 148 ms 10336 KB Output is correct
6 Correct 159 ms 11520 KB Output is correct
7 Correct 169 ms 9992 KB Output is correct
8 Correct 174 ms 9908 KB Output is correct
9 Correct 163 ms 10296 KB Output is correct
10 Correct 176 ms 11536 KB Output is correct
11 Correct 202 ms 11156 KB Output is correct
12 Correct 175 ms 11308 KB Output is correct
13 Correct 124 ms 9952 KB Output is correct
14 Correct 119 ms 9388 KB Output is correct
15 Correct 134 ms 9932 KB Output is correct
16 Correct 118 ms 9600 KB Output is correct
17 Correct 126 ms 9956 KB Output is correct
18 Correct 129 ms 9908 KB Output is correct
19 Correct 209 ms 11284 KB Output is correct
20 Correct 176 ms 11260 KB Output is correct
21 Correct 200 ms 11300 KB Output is correct
22 Correct 180 ms 11768 KB Output is correct
23 Correct 191 ms 11744 KB Output is correct
24 Correct 169 ms 11708 KB Output is correct
25 Correct 174 ms 11748 KB Output is correct
26 Correct 207 ms 11328 KB Output is correct
27 Correct 103 ms 9716 KB Output is correct
28 Correct 124 ms 10340 KB Output is correct
29 Correct 132 ms 10020 KB Output is correct
30 Correct 78 ms 9496 KB Output is correct
31 Correct 138 ms 9896 KB Output is correct
32 Correct 94 ms 9600 KB Output is correct
33 Correct 106 ms 9844 KB Output is correct
34 Correct 98 ms 9724 KB Output is correct
35 Correct 120 ms 9672 KB Output is correct
36 Correct 87 ms 9804 KB Output is correct
37 Correct 125 ms 9828 KB Output is correct
38 Correct 122 ms 9996 KB Output is correct
39 Correct 188 ms 11608 KB Output is correct
40 Correct 199 ms 11316 KB Output is correct
41 Correct 147 ms 11372 KB Output is correct
42 Correct 166 ms 11820 KB Output is correct