Submission #1100355

#	Time	Username	Problem	Language	Result	Execution time	Memory
1100355		vjudge1	Regions (IOI09_regions)	C++17	0 / 100	1154 ms	72520 KiB

regions

#include<bits/stdc++.h>
using namespace std;
int n,r,q,ly[200005],h[200005],dp[2505][2505];
vector<int>v[200005],c[200005];
void dfs(int x)
{
    for(auto i:v[x])
    {
        if(ly[x]>ly[i])continue;
        dfs(i);
        if(h[x]!=h[i])dp[h[x]][h[i]]++;
        for(int y=1;y<=r;y++)
        {
            if(h[i]==y||h[x]==y)continue;
            dp[h[x]][y]+=dp[h[i]][y];
        }
    }
}
int main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cin>>n>>r>>q;
    int hm,sp;
    cin>>hm;
    h[1]=hm;
    c[hm].push_back(1);
    for(int x=2;x<=n;x++)
    {
        cin>>sp>>hm;
        v[sp].push_back(x);
        v[x].push_back(sp);
        h[x]=hm;
        ly[x]=ly[sp]+1;
        c[hm].push_back(x);
    }
    dfs(1);
    while(q--)
    {
        int l,r;
        cin>>l>>r;
        cout<<dp[l][r]<<'\n'<<flush;
    }
}

• Subtask 1: 0 / 15
• Subtask 2: 0 / 85