oj.uz

Submission #824735

# Submission time Handle Problem Language Result Execution time Memory
824735 2023-08-14T09:15:50 Z ALeonidou Highway Tolls (IOI18_highway) C++17
5 / 100
 72 ms 9784 KB 
#include <bits/stdc++.h>
#include "highway.h"

using namespace std;

#define ll int
typedef vector <ll> vi;
typedef pair <ll,ll > ii;
typedef vector <ii> vii;
#define sz(x) (ll)x.size()
#define pb push_back
#define F first
#define S second
#define MID ((l+r)/2)
#define dbg(x) cout<<#x<<": "<<x<<endl;
#define dbg2(x,y) cout<<#x<<": "<<x<<" "<<#y<<": "<<y<<endl;
#define dbg3(x,y,z) cout<<#x<<": "<<x<<" "<<#y<<": "<<y<<" "<<#z<<": "<<z<<endl;

void tabb(ll n){
    for (ll i= 0; i<n; i++) cout<<"\t";
}

void printVct(vi &v){
    for (ll i=0; i<sz(v); i++){
        cout<<v[i]<<" ";
    }
    cout<<endl;
}

void printVctPair(vii &v){
    for (ll i=0; i<sz(v); i++){
        cout<<"("<<v[i].F<<","<<v[i].S<<") ";
    }
    cout<<endl;
}

void printVctPair2D(vector<vii> &adj){
    for (ll i=0; i<sz(adj); i++){
        for (ll j =0; j<sz(adj[i]); j++){
            cout<<"("<<adj[i][j].F<<","<<adj[i][j].S<<"),";
        }
        cout<<endl;
    }
    cout<<endl;
}

vector <vii> adj;
vi vis;
void dfs(ll u, ll s, ll t, vii &canditates){
    vis[u] = 1;
    for (ll i=0; i<sz(adj[u]); i++){
        if (!vis[adj[u][i].F]){
            dfs(adj[u][i].F,s + 1, t, canditates);
            if (s == t-1){
                canditates.pb(adj[u][i]);
            }
        }
    }
}

void find_pair(int n, vi V, vi U, int a,int b) {
    //subtask 1+2
    ll m = sz(U);
    //dbg2(n,m);
    adj.assign(n, vii());
    for (ll i=0; i<m ;i++){
        //dbg2(U[i], V[i]);
        adj[U[i]].pb(ii(V[i], i));
        adj[V[i]].pb(ii(U[i], i));
    }
    //printVctPair2D(adj);
    
    vi v(m, 0);
    long long f = ask(v);
    ll dis = (long long)(f / ((long long)(a)));
    
    vii canditates;     //(node, edge)
    vis.assign(n, 0);
    dfs(0, 0, dis, canditates);

    //printVctPair(canditates);

    ll l = 0, r = sz(canditates)-1,mid;
    while (l < r){
        mid  = MID;
        //dbg3(l,r,mid);
        v.assign(m,0);
        for (ll i = 0; i<=mid; i++){    //select left part
            v[canditates[i].S] = 1;
        }

        //printVct(v);

        ll cur = ask(v);

        if (cur > f){
            r  = mid;
        }
        else{
           l = mid+1;
        }  
    }
    ll t = canditates[l].F;
    //dbg(t);
    answer(0, t);
}

/*
14 13 2 5 0 13
0 1
1 5
1 4
1 2
2 3
5 7
7 8
5 6
3 12
3 11
2 9
9 10
9 13

*/

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 0 ms 208 KB Output is correct

Subtask #2
0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 336 KB Output is correct
2 Correct 6 ms 1104 KB Output is correct
3 Correct 58 ms 8116 KB Output is correct
4 Correct 64 ms 8096 KB Output is correct
5 Correct 72 ms 8168 KB Output is correct
6 Correct 58 ms 7952 KB Output is correct
7 Correct 60 ms 8016 KB Output is correct
8 Correct 61 ms 8120 KB Output is correct
9 Correct 59 ms 7900 KB Output is correct
10 Correct 72 ms 8128 KB Output is correct
11 Correct 59 ms 8976 KB Output is correct
12 Correct 60 ms 9784 KB Output is correct
13 Correct 61 ms 9176 KB Output is correct
14 Incorrect 60 ms 8408 KB Output is incorrect: {s, t} is wrong.
15 Halted 0 ms 0 KB -

Subtask #3
0 / 6.0

# Verdict Execution time Memory Grader output
1 Incorrect 6 ms 1872 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 Incorrect 7 ms 1316 KB Output is incorrect: {s, t} is wrong.
2 Halted 0 ms 0 KB -

Subtask #6
0 / 31.0

# Verdict Execution time Memory Grader output
1 Incorrect 6 ms 1232 KB Output is incorrect: {s, t} is wrong.
2 Halted 0 ms 0 KB -