Submission #34988

#	Time	Username	Problem	Language	Result	Execution time	Memory
34988		itsjustwinds	스파이 (JOI13_spy)	C++14	10 / 100	199 ms	262100 KiB

spy

#include<bits/stdc++.h>
#define maxn 2005
using namespace std;
int n,r1,r2;
bitset<500005> a[maxn],b[maxn];
vector<int > e1[maxn],e2[maxn];
bitset<500005> c;
void read(int &a)
{
        a=0;
        char s=getchar();
        for(;s>='0'&&s<='9';s=getchar())
        {
                a=a*10+s-'0';
        }
}
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');
}
void dfs1(int u)
{
        for (int i=0;i<e1[u].size();++i)
        {
                int v=e1[u][i];
                a[v]=a[v]|a[u];
                dfs1(v);
        }
}
void dfs2(int u)
{
        for (int i=0;i<e2[u].size();++i)
        {
                int v=e2[u][i];
                b[v]=b[v]|b[u];
                dfs2(v);
        }
}
int p,q,u,v;
int main()
{
        //freopen("SPY.inp","r",stdin);
        int test;
        read(n);
        read(test);
        //cin>>n>>test;
        for (int i=1;i<=n;++i)
        {
                read(p);
                read(q);
                if (p) e1[p].push_back(i);
                else r1=i;
                if (q) e2[q].push_back(i);
                else r2=i;
        }
        while(test--)
        {
                read(u);
                read(v);
                a[u].set(test+1);
                b[v].set(test+1);
        }
        dfs1(r1);
        dfs2(r2);
        for (int i=1;i<=n;++i)
        {
                c=a[i]&b[i];
                writeln(c.count());
        }
        return 0;
}

Compilation message (stderr)

spy.cpp: In function 'void dfs1(int)':
spy.cpp:36:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for (int i=0;i<e1[u].size();++i)
                       ^
spy.cpp: In function 'void dfs2(int)':
spy.cpp:45:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for (int i=0;i<e2[u].size();++i)
                       ^

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