Submission #909136

#	Time	Username	Problem	Language	Result	Execution time	Memory
909136		adhityamv	Game (APIO22_game)	C++17	60 / 100	4057 ms	44764 KiB

game

#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define mp make_pair
#define pii pair<int,int>
#define fi first
#define se second
vector<vector<int>> edges;
vector<vector<int>> redges;
vector<int> minreach;
vector<int> maxreturn;
int n,k;
void init(int N,int K){
    n=N;
    k=K;
    for(int i=0;i<n;i++){
        edges.push_back({});
        redges.push_back({});
    }
    for(int i=0;i<k;i++){
        minreach.push_back(i);
        maxreturn.push_back(i);
    }
    for(int i=k;i<n;i++){
        minreach.push_back(k);
        maxreturn.push_back(-1);
    }
}
bool dfs(int u){
    bool ans=true;
    if((maxreturn[u]>minreach[u]) || (maxreturn[u]==minreach[u] && u>=k)) ans=false;
    for(int v:edges[u]){
        if(maxreturn[v]<maxreturn[u]){
            maxreturn[v]=maxreturn[u];
            
            if(!dfs(v)) ans=false;;
        }
    }
    return ans;
}
bool rdfs(int u){
    bool ans=true;
    if((maxreturn[u]>minreach[u]) || (maxreturn[u]==minreach[u] && u>=k)) ans=false;
    for(int v:redges[u]){
        if(minreach[v]>minreach[u]){
            minreach[v]=minreach[u];
            if(!dfs(v)) ans=false;;
        }
    }
    return ans;
}
int add_teleporter(int u,int v){
    if(u==v){
        if(u>=k) return 0;
        return 1;
    }
    edges[u].push_back(v);
    redges[v].push_back(u);
    if(maxreturn[v]<maxreturn[u]){
        maxreturn[v]=maxreturn[u];
        if(!dfs(v)) return 1;
    }
    if(minreach[u]>minreach[v]){
        minreach[u]=minreach[v];
        if(!rdfs(u)) return 1;
    }
    return 0;
}

• Subtask 1: 2 / 2
• Subtask 2: 10 / 10
• Subtask 3: 18 / 18
• Subtask 4: 30 / 30
• Subtask 5: 0 / 40