Submission #35018

#	Time	Username	Problem	Language	Result	Execution time	Memory
35018		luongduydat	스파이 (JOI13_spy)	C++14	100 / 100	366 ms	247172 KiB

spy

#include <iostream>
#include <cmath>
#include <cstdio>
#include <vector>
#include <bitset>
using namespace std;
template<typename T> inline void read(T &x) {
    char c;
    bool neg = false;
    while (!isdigit(c = getchar()) && c != '-');
    x = 0;
    if (c == '-') {
        neg = true;
        c = getchar();
    }
    do {
        x = x * 10 + c - '0';
    } while (isdigit(c = getchar()));
    if (neg) x = -x;
}
template<typename T> inline void write(T x) {
    if (x < 0) {
        putchar('-');
        write(-x);return;
    }
    if (x < 10) {
        putchar(char(x + 48));
    }
    else {
        write(x/10);
        putchar(char(48 + x%10));
    }
}
template<typename T> inline void writeln(T x) {
    write(x);
    putchar('\n');
}
int n,m;
vector <int> aj[2005],ai[2005];
bitset<500005> p[2005],q[2005];
void Enter()
{
    read(n);read(m);
    for (int i=1;i<=n;i++)
    {
        int u,v;
        read(u);read(v);
        aj[u].push_back(i);
        ai[v].push_back(i);
    }
}
void DFS1(int u)
{
    for (int v:aj[u])
    {
        p[v]|=p[u];
        DFS1(v);
    }
}
void DFS2(int u)
{
    for (int v:ai[u])
    {
        q[v]|=q[u];
        DFS2(v);
    }
}
void Solve()
{
    for (int i=0;i<m;i++)
    {
        int u,v;read(u);read(v);
        p[u].set(i);
        q[v].set(i);
    }
    DFS1(aj[0][0]);
    DFS2(ai[0][0]);
    for (int i=1;i<=n;i++)
    {
        int kq=(p[i]&q[i]).count();
        writeln(kq);
    }
}
int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    Enter();
    Solve();
}

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