oj.uz

Submission #993969

# Submission time Handle Problem Language Result Execution time Memory
993969 2024-06-06T22:40:41 Z MarwenElarbi Stranded Far From Home (BOI22_island) C++17
10 / 100
 212 ms 43600 KB 
#include <bits/stdc++.h>
using namespace std;
#define fi first
#define se second
#define ll long long
#define pb push_back
#define ii pair<int,int>
const int nax=2e5+5;
vector<int> adj[nax];
vector<int> newadj[nax];
int tab[nax];
int parent[nax];
long long sz[nax];
int ans[nax];
int find(int x){
    if(parent[x]==x) return x;
    return parent[x]=find(parent[x]);
}
bool sameset(int x,int y){
    return find(x)==find(y);
}
void joinset(int x,int y){
    x=find(x);
    y=find(y);
    parent[x]=y;
}
bool compare(int x,int y){
    if(tab[x]!=tab[y]) return tab[x]>tab[y];
    else return x>y;
}
void precompute(int x,int p){
    sz[x]=tab[x];
    for(auto u:newadj[x]){
        if(u==p) continue;
        precompute(u,x);
        sz[x]+=sz[u];
    }
}
void dfs(int x,int p){
    for(auto u:newadj[x]){
        if(u==p) continue;
        if(sz[u]<tab[x]) continue;
        ans[u]=1;
        dfs(u,x);
    }
}
int main(){
    int n,m;
    cin>>n>>m;
    vector<pair<int,int>> cur(n);
    for (int i = 0; i < n; ++i)
    {
        parent[i]=i;
        cin>>tab[i];
        cur[i]={tab[i],i};
    }
    for (int i = 0; i < m; ++i)
    {
        int x,y;
        cin>>x>>y;
        x--;y--;
        adj[x].pb(y);
        adj[y].pb(x);
    }
    sort(cur.begin(),cur.end());
    for (int i = 0; i < n; ++i)
    {
        sort(adj[i].begin(),adj[i].end(),compare);
    }
    for (int t = 1; t < n; ++t)
    {
        int i=cur[t].se;
        for(auto u:adj[i]){
            if(tab[u]<=tab[i]&&(!sameset(i,u))){
                joinset(i,u);
                newadj[i].pb(u);
                newadj[u].pb(i);
            }
        }
    }
    precompute(cur[n-1].se,-1);
    ans[cur[n-1].se]=true;
    dfs(cur[n-1].se,-1);
    for (int i = 0; i < n; ++i)
    {
        cout <<ans[i];
    }cout <<endl;
}

Subtask #1
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 13400 KB Output is correct
2 Correct 2 ms 13404 KB Output is correct
3 Correct 2 ms 13404 KB Output is correct
4 Incorrect 3 ms 13660 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 13404 KB Output is correct
2 Correct 2 ms 13572 KB Output is correct
3 Correct 180 ms 34336 KB Output is correct
4 Correct 146 ms 33360 KB Output is correct
5 Correct 185 ms 27632 KB Output is correct
6 Correct 188 ms 27984 KB Output is correct
7 Correct 204 ms 28244 KB Output is correct
8 Correct 195 ms 27988 KB Output is correct
9 Correct 160 ms 27932 KB Output is correct
10 Correct 166 ms 29384 KB Output is correct
11 Correct 168 ms 29584 KB Output is correct
12 Correct 156 ms 27940 KB Output is correct
13 Correct 157 ms 43356 KB Output is correct
14 Correct 148 ms 41812 KB Output is correct
15 Correct 174 ms 43600 KB Output is correct
16 Correct 151 ms 43344 KB Output is correct

Subtask #3
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 13404 KB Output is correct
2 Incorrect 199 ms 36376 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #4
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 13400 KB Output is correct
2 Incorrect 212 ms 27928 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #5
0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 13400 KB Output is correct
2 Correct 2 ms 13404 KB Output is correct
3 Correct 2 ms 13404 KB Output is correct
4 Incorrect 3 ms 13660 KB Output isn't correct
5 Halted 0 ms 0 KB -