제출 #1184350

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1184350		pensive	친구 (IOI14_friend)	C++20	0 / 100	68 ms	131072 KiB

friend

#include "friend.h"
#include <iostream>
#include <algorithm>
#include <vector>
#include <algorithm>


using namespace std;
#define ll long long
#define REP(a,i,n) for (int i=a;i<n;i++)
#define f first
#define s second

void iayf(int n, int i, int host, vector<vector<int>> &adjList) {
    adjList[host].push_back(i);
    adjList[i].push_back(host);
}
void mfayf(int n, int i, int host, vector<vector<int>> &adjList) {
    for (auto j : adjList[host]) {
        adjList[j].push_back(i);
        adjList[i].push_back(j);
    }
}
void wayf(int n, int i, int host, vector<vector<int>> &adjList) {
    mfayf(n,i,host,adjList);
    iayf(n, i, host, adjList);
}

int memoing(int n, int node, int parent, vector<vector<int>> &adjList, vector<pair<int,int> > &memo, int confidence[]) {
    if (memo[node].f == -1) {
        if (adjList[node].size()==1 && adjList[node][0]==parent) { //leaf
            memo[node].f =0;
            memo[node].s = confidence[node];
        }
        else {
            int sm=0, sm2=0;
            for (auto j : adjList[node]) {
                sm += memoing(n, j, node, adjList, memo, confidence);
                sm2 += memo[j].f;
            }
            memo[node].f= sm; memo[node].s= sm2;
        }
    }
    return max(memo[node].f, memo[node].s);
}

int findSample(int n, int confidence[], int host[], int protocol[]) {
    vector<vector<int> > adjList(n);
    REP(1,i,n) {
        if (protocol[i]==0) iayf(n,i,host[i],adjList);
        else if (protocol[i]==1) mfayf(n,i,host[i],adjList);
        else if (protocol[i]==2) wayf(n,i,host[i],adjList);
    }
    vector<pair<int,int> > memo(n,{-1,-1});
    return memoing(n,0,-1,adjList,memo,confidence);
} 

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