Submission #35017

#	Time	Username	Problem	Language	Result	Execution time	Memory
35017		nad312	스파이 (JOI13_spy)	C++14	100 / 100	356 ms	10512 KiB

spy

#include<bits/stdc++.h>
using namespace std;
typedef long long int lli;
lli a, b, c, d, e, f, g, h, parx[2009], pary[2009], root, ans[2009]={}, cnt[2009]={};
vector<lli> D[2009], x[2009];
void DSF(lli u)
{
	for(auto v: x[u])
	{
		cnt[v]++;
	}
	lli m=u;
	while(m!=0)
	{
		ans[u]+=cnt[m];
		m=pary[m];
	}
	for(auto v: D[u])
	{
		DSF(v);
	}
	for(auto v: x[u])
	{
		cnt[v]--;
	}
}
int main()
{
	//freopen("test.inp","r",stdin);
	cin>>a>>b;
	for(int i=1;i<=a;i++)
	{
		cin>>parx[i]>>pary[i];
		if(parx[i]==0)
		{
			root==i;
		}
		D[parx[i]].push_back(i);
	}
	for(int i=1;i<=b;i++)
	{
		cin>>c>>d;
		x[c].push_back(d);
	}
	DSF(root);
	for(int i=1;i<=a;i++)
	{
		cout<<ans[i]<<endl;
	}
}

Compilation message (stderr)

spy.cpp: In function 'int main()':
spy.cpp:36:8: warning: statement has no effect [-Wunused-value]
    root==i;
        ^

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