Submission #34940

#	Time	Username	Problem	Language	Result	Execution time	Memory
34940		wan2000	스파이 (JOI13_spy)	C++14	0 / 100	0 ms	1840 KiB

spy

#include <bits/stdc++.h>

using namespace std;

template<typename T> inline void read(T &x){
    x = 0; char ch;
    while(!isdigit(ch=getchar()));
    do{x=10*x+ch-'0';}while(isdigit(ch=getchar()));
}

const int N = 2001;
const int M = 5e5+1;

int n, m, mx;
bitset<M> D[2][N], F[N];
vector<int> Adj[2][N];

void DFS(int u, int tp){
    F[u] &= D[tp][u];
    for(int i = 0; i < (int)Adj[tp][u].size(); i++){
        int v = Adj[tp][u][i];
        D[tp][v] |= D[tp][u];
        DFS(v,tp);
    }
}

int main()
{
    ios_base::sync_with_stdio(0); cin.tie(0);
    read(n); read(m);
    for(int i = 1; i <= n; i++){
        int x, y;
        read(x); read(y);
        Adj[0][x].push_back(i);
        Adj[1][y].push_back(i);
    }
    for(int i = 0; i < m; i++){
        int x, y;
        read(x); read(y);
        D[0][x].set(i);
        D[1][y].set(i);
    }
    for(int i = 1; i <= n; i++){
        F[i].flip();
    }
    DFS(0,0);
    DFS(0,1);
    for(int i = 1; i <= n; i++){
        cout<<F[i].count()<<'\n';
    }
    return 0;
}

• Subtask 1: 0 / 10
• Subtask 2: 0 / 20
• Subtask 3: 0 / 70