oj.uz

Submission #816403

# Submission time Handle Problem Language Result Execution time Memory
816403 2023-08-09T05:00:16 Z Jarif_Rahman Highway Tolls (IOI18_highway) C++17
12 / 100
 203 ms 262144 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;
vector<int> depth, p, pe;

void dfs(int nd, int dad, int dad_edge, int d){
    p[nd] = dad;
    depth[nd] = d;
    pe[nd] = dad_edge;
    for(auto [x, i]: graph[nd]) if(x != dad) dfs(x, nd, i, d+1);
}

void find_pair(int _n, vector<int> U, vector<int> V, int _A, int _B){
    swap(n, _n);
    int m = U.size();
    A = _A, B = _B;
    graph.resize(n);
    depth.resize(n);
    p.resize(n);
    pe.resize(n, -1);

    for(int i = 0; i < m; i++){
        graph[U[i]].pb({V[i], i});
        graph[V[i]].pb({U[i], i});
    }

    dfs(0, -1, -1, 0);
    vector<int> o(n);
    for(int i = 0; i < n; i++) o[i] = i;
    sort(o.begin(), o.end(), [&](int a, int b){
        return depth[a] > depth[b];
    });

    ll def = ask(vector<int>(m, 0));

    bool subtask3 = 1;
    for(int i = 0; i < n-1; i++) if(U[i] != i || V[i] != i+1) subtask3 = 0;

    if(subtask3){
        int s, t;
        {
            int a = 0, b = m-1;
            while(a < b){
                int md = (a+b+1)/2;
                vector<int> w(m, 0);
                for(int i = 0; i <= md; i++) w[i] = 1;
                ll x = ask(w);
                if(x > def) a = md;
                else b = md-1;
            }
            t = a+1;
        }
        {
            int a = 0, b = m-1;
            while(a < b){
                int md = (a+b+1)/2;
                vector<int> w(m, 0);
                for(int i = m-1; i >= md; i--) w[i] = 1;
                ll x = ask(w);
                if(x > def) b = md-1;
                else a = md;
            }
            s = a;
        }
        answer(s, t);
        return;
    }

    int a = 0, b = n-1;
    while(a < b){
        int md = (a+b)/2;
        vector<int> w(m, 0);
        for(int i = 0; i <= md; i++) if(pe[o[i]] != -1) w[pe[o[i]]] = 1;
        ll x = ask(w);
        if(x > def) b = md;
        else a = md+1;
    }

    answer(0, o[a]);
}

Subtask #1
5.0 / 5.0

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

Subtask #2
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 336 KB Output is correct
2 Correct 12 ms 1228 KB Output is correct
3 Correct 124 ms 8952 KB Output is correct
4 Correct 84 ms 8960 KB Output is correct
5 Correct 104 ms 8956 KB Output is correct
6 Correct 98 ms 8956 KB Output is correct
7 Correct 67 ms 9072 KB Output is correct
8 Correct 73 ms 8952 KB Output is correct
9 Correct 73 ms 8964 KB Output is correct
10 Correct 72 ms 8960 KB Output is correct
11 Correct 101 ms 9440 KB Output is correct
12 Correct 83 ms 9868 KB Output is correct
13 Correct 89 ms 9508 KB Output is correct
14 Correct 86 ms 9100 KB Output is correct

Subtask #3
0 / 6.0

# Verdict Execution time Memory Grader output
1 Incorrect 10 ms 1644 KB Output is incorrect: {s, t} is wrong.
2 Halted 0 ms 0 KB -

Subtask #4
0 / 33.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 336 KB Output is incorrect: {s, t} is wrong.
2 Halted 0 ms 0 KB -

Subtask #5
0 / 18.0

# Verdict Execution time Memory Grader output
1 Runtime error 187 ms 262144 KB Execution killed with signal 9
2 Halted 0 ms 0 KB -

Subtask #6
0 / 31.0

# Verdict Execution time Memory Grader output
1 Runtime error 203 ms 262144 KB Execution killed with signal 9
2 Halted 0 ms 0 KB -