oj.uz

답안 #870097

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
870097 2023-11-06T23:51:28 Z Ahmed_Solyman Stranded Far From Home (BOI22_island) C++14
0 / 100
 3 ms 5464 KB 
/*
In the name of Allah
made by: Ahmed_Solyman
*/
#include <bits/stdc++.h>
#include <ext/rope>
 
using namespace std;
using namespace __gnu_cxx;
#pragma GCC optimize("-Ofast")
#pragma GCC optimize("-O1")
//-------------------------------------------------------------//
typedef long long ll;
typedef unsigned long long ull;
#define fast ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
#define PI acos(-1)
#define lb lower_bound
#define ub upper_bound
#define endl '\n'
#define all(v) v.begin(),v.end()
#define allr(v) v.rbegin(),v.rend()
#define sum_to(n) (n*(n+1))/2
#define pb push_back
#define pf push_front
#define fil(arr,x) memset(arr,x,sizeof(arr))
const ll mod=1e9+7;
int dx[8]={0,1,0,-1,1,1,-1,-1};
int dy[8]={1,0,-1,0,1,-1,-1,1};
//-------------------------------------------------------------//
ll lcm(ll a,ll b)
{
    return (max(a,b)/__gcd(a,b))*min(a,b);
}
void person_bool(bool x)
{
    cout<<(x?"YES":"NO")<<endl;
}
const int N=2e5+5;
int ans[N],arr[N],n,m;
vector<int>adj[N];
struct DSU{
    vector<int>P,sz,sum;
    vector<vector<int>>ok;
    void init(int n){
        P.resize(n+5);
        ok.resize(n+5);
        sum.resize(n+5);
        for(int i=0;i<n+5;i++)sum[i]=arr[i],P[i]=i,ok[i].push_back(i);
    }
    int find(int node){
        if(P[node]==node)return node;
        return P[node]=find(P[node]);
    }
    bool unite(int a,int b){
        int p1=find(a);
        int p2=find(b);
        if(p1==p2){
            return 0;
        }
        if(sum[p2]<arr[a]){
            for(auto i:ok[p2])ans[i]=0;
            ok[p2].clear();
        }
        for(auto i:ok[p1])ok[p2].push_back(i);
        ok[p1].clear();
        P[p1]=p2;
        sum[p2]+=sum[p1];
        return 1;
    }
}d;
int main()
{
    //freopen("input.txt","r",stdin);
    //freopen("output.txt","w",stdout);
    #ifndef ONLINE_JUDGE
    freopen("input.in", "r", stdin);
    freopen("output.out", "w", stdout);
    #endif
    fast
    cin>>n>>m;
    vector<pair<int,int>>v;
    for(int i=1;i<=n;i++){
        cin>>arr[i];
        v.push_back({arr[i],i});
    }
    while(m--){
        int u,v;cin>>u>>v;
        adj[u].push_back(v);
        adj[v].push_back(u);
    }
    d.init(n);
    sort(all(v));
    for(int i=0;i<n;i++){
        int node=v[i].second,x=v[i].first;
        for(auto ch:adj[node]){
            if(arr[ch]>arr[node] || (arr[ch]==arr[node] && ch>node))continue;
            d.unite(node,ch);
        }
    }
    for(auto i:d.ok[d.find(1)])ans[i]=1;
    for(int i=1;i<=n;i++)cout<<ans[i];
    cout<<endl;
    return 0;
}

Compilation message

island.cpp: In function 'int main()':
island.cpp:94:30: warning: unused variable 'x' [-Wunused-variable]
   94 |         int node=v[i].second,x=v[i].first;
      |                              ^
island.cpp:76:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   76 |     freopen("input.in", "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
island.cpp:77:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   77 |     freopen("output.out", "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 3 ms 5208 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 2 ms 5464 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 2 ms 5212 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 3 ms 5236 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 35.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 3 ms 5208 KB Output isn't correct
2 Halted 0 ms 0 KB -