Submission #305039

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
305039	2020-09-22 12:44:16	vipghn2003	Race (IOI11_race)	C++14	100 / 100	567 ms	83192 KiB

race

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#include<bits/stdc++.h>
#define fi first
#define se second
#define pii pair<int,int>
using namespace std;
const int N=2e5+5;
int res,k;
map<int,int>mp[N];
vector<pii>adj[N];
void dfs(int u,int p=-1,int h=0,int w=0)
{
    mp[u][w]=h;
    int tmp=u;
    for(auto&to:adj[u])
    {
        int v=to.fi;
        if(v==p) continue;
        dfs(v,tmp,h+1,w+to.se);
        if(mp[u].size()<mp[v].size()) swap(mp[u],mp[v]);
        for(auto&x:mp[v])
        {
            if(mp[u].count(k+2*w-x.fi))
            {
                res=min(res,x.se+mp[u][k+2*w-x.fi]-2*h);
            }
        }
        for(auto&x:mp[v])
        {
 
 
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• Subtask 1: 9 / 9
• Subtask 2: 12 / 12
• Subtask 3: 22 / 22
• Subtask 4: 57 / 57