Submission #34945

#	Time	Username	Problem	Language	Result	Execution time	Memory
34945		wan2000	스파이 (JOI13_spy)	C++14	10 / 100	346 ms	246768 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, ra, rb;
bitset<M> Da[N], Db[N], cur;
vector<int> Ga[N], Gb[N];

void DFSa(int u){
    for(int i = 0; i < (int)Ga[u].size(); i++){
        int v = Ga[u][i];
        Da[v] |= Da[u];
        DFSa(v);
    }
}

void DFSb(int u){
    for(int i = 0; i < (int)Gb[u].size(); i++){
        int v = Gb[u][i];
        Db[v] |= Db[u];
        DFSb(v);
    }
}

int main()
{
    ios_base::sync_with_stdio(0); cin.tie(0);
    read(n); read(m);
    for(int i = 1; i <= n; i++){
        int x;
        read(x);
        if(x==0) ra = i;
        else Ga[x].push_back(i);
        read(x);
        if(x==0) rb = i;
        else Gb[x].push_back(i);
    }
    for(int i = 0; i < m; i++){
        int x;
        read(x);
        Da[x].set(i);
        read(x);
        Db[x].set(i);
    }
    DFSa(ra);
    DFSb(rb);
    for(int i = 1; i <= n; i++){
        cur = Da[i]&Db[i];
        cout<<cur.count()<<'\n';
    }
    return 0;
}

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