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Submission #1005846

# Submission time Handle Problem Language Result Execution time Memory
1005846 2024-06-23T07:01:49 Z irmuun Highway Tolls (IOI18_highway) C++17
12 / 100
 260 ms 262144 KB 
#include<bits/stdc++.h>
#include "highway.h"
 
using namespace std;
 
#define ll long long
#define pb push_back
#define ff first
#define ss second
#define all(s) s.begin(),s.end()
#define rall(s) s.rbegin(),s.rend()

const int maxn=9e4+5;

int n,m,a,b;
vector<int>u,v;

vector<pair<int,int>>adj[maxn];
vector<int>par(maxn,0),dep(maxn,0),edge(maxn,0),w;
vector<bool>used(maxn);

void dfs(int x,int p){
    par[x]=p;
    for(auto [y,e]:adj[x]){
        if(y!=p){
            dep[y]=dep[x]+1;
            edge[y]=e;
            dfs(y,x);
        }
    }
}


void find_pair(int N,vector<int>U,vector<int>V,int A, int B){
    n=N,u=U,v=V,a=A,b=B;
    m=u.size();
    w.resize(m);
    fill(all(w),0);
    for(int i=0;i<m;i++){
        adj[u[i]].pb({v[i],i});
        adj[v[i]].pb({u[i],i});
    }
    ll C=ask(w);
    dep[0]=0;
    dfs(0,-1);
    vector<int>ver;
    for(int i=1;i<n;i++){
        if((ll)dep[i]*(ll)a==C){
            ver.pb(i);
        }
    }
    int l=0,r=ver.size()-1;
    while(l<r){
        int mid=(l+r)/2;
        fill(all(w),0);
        for(int i=0;i<=mid;i++){
            w[edge[ver[i]]]=1;
        }
        ll cost=ask(w);
        if(cost>C){
            r=mid;
        }
        else{
            l=mid+1;
        }
    }
    answer(0,ver[l]);
    return;
}

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 3416 KB Output is correct
2 Correct 1 ms 3416 KB Output is correct
3 Correct 1 ms 3416 KB Output is correct
4 Correct 1 ms 3416 KB Output is correct
5 Correct 1 ms 3416 KB Output is correct
6 Correct 2 ms 3416 KB Output is correct
7 Correct 1 ms 3424 KB Output is correct
8 Correct 2 ms 3416 KB Output is correct
9 Correct 2 ms 3416 KB Output is correct
10 Correct 1 ms 3420 KB Output is correct
11 Correct 2 ms 3416 KB Output is correct
12 Correct 2 ms 3416 KB Output is correct

Subtask #2
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 3672 KB Output is correct
2 Correct 7 ms 4184 KB Output is correct
3 Correct 69 ms 9560 KB Output is correct
4 Correct 67 ms 9444 KB Output is correct
5 Correct 67 ms 9552 KB Output is correct
6 Correct 68 ms 9476 KB Output is correct
7 Correct 73 ms 9508 KB Output is correct
8 Correct 69 ms 9800 KB Output is correct
9 Correct 62 ms 9424 KB Output is correct
10 Correct 72 ms 9552 KB Output is correct
11 Correct 65 ms 9700 KB Output is correct
12 Correct 66 ms 10208 KB Output is correct
13 Correct 67 ms 9804 KB Output is correct
14 Correct 66 ms 9552 KB Output is correct

Subtask #3
0 / 6.0

# Verdict Execution time Memory Grader output
1 Incorrect 7 ms 4440 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 2 ms 3672 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 260 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 217 ms 262144 KB Execution killed with signal 9
2 Halted 0 ms 0 KB -