Submission #1069521

#	Time	Username	Problem	Language	Result	Execution time	Memory
1069521		Muhammad_Aneeq	봉쇄 시간 (IOI23_closing)	C++17	0 / 100	1138 ms	1564172 KiB

closing

#include <vector>
#include <queue>
#include <algorithm>
using namespace std;
int const N=2e5+10;
vector<pair<int,int>>nei[N]={};
long long dis[2][N]={};
bool uni=0;
vector<pair<long long,int>>d[2];
void dfs(int u,int p=-1)
{
    d[uni].push_back({dis[uni][u],u});
    for (auto [i,w]:nei[u])
    {
        if (i==p)
            continue;
        dis[uni][i]=dis[uni][u]+w;
        dfs(i,u);
    }
}
int max_score(int N, int X, int Y, long long K, vector<int> U,vector<int> V, vector<int> W)
{
    for (int i=0;i<N-1;i++)
    {
        nei[U[i]].push_back({V[i],W[i]});
        nei[V[i]].push_back({U[i],W[i]});
    }
    dfs(X);
    uni=1;
    dfs(Y);
    for (int i=0;i<2;i++)
        sort(begin(d[i]),end(d[i]));
    int i=0,j=0;
    int cnt=0;
    while (i<N&&j<N)
    {
        long long z=1e15;
        if (i<N)
            z=d[0][i].first;
        if (j<N)
            z=min(z,d[0][i].first);
        if (z>K)
            break;
        else
            K-=z;
        if (i<N&&j<N)
        {
            if (d[0][i].first<d[1][j].first)
            {
                cnt++;i++;
            }
            else
            {
                cnt++;j++;
            }
        }
        else if (i==N)
        {
            cnt++;
            j++;
        }
        else
            cnt++,i++;
    }
    return cnt;
}

• Subtask 0: 0 / 0
• Subtask 1: 0 / 8
• Subtask 2: 0 / 9
• Subtask 3: 0 / 12
• Subtask 4: 0 / 14
• Subtask 5: 0 / 9
• Subtask 6: 0 / 11
• Subtask 7: 0 / 10
• Subtask 8: 0 / 10
• Subtask 9: 0 / 17