제출 #418179

#제출 시각아이디문제언어결과실행 시간메모리
418179ja_kingy친구 (IOI14_friend)C++14
100 / 100
50 ms7420 KiB
#include "friend.h" #include <bits/stdc++.h> using namespace std; int findSample(int n,int confidence[],int host[],int protocol[]){ vector<vector<int>> t(n); vector<int[2]> dp(n); for (int i = 1; i < n; ++i) { t[host[i]].push_back(i); } for (int i = n; i--;) { for (int f = 0; f < 2; ++f) { int sm = 0; for (int v: t[i]) { if (protocol[v] == 0) sm += dp[v][1]; else sm += dp[v][0]; } dp[i][f] = max(dp[i][f], sm); for (int v: t[i]) { if (protocol[v] == 0) sm += dp[v][0] - dp[v][1]; else if (f) sm += dp[v][1] - dp[v][0]; dp[i][f] = max(dp[i][f], sm); if (f && protocol[v] == 2) sm += dp[v][0] - dp[v][1]; } if (f) sm += confidence[i]; dp[i][f] = max(dp[i][f], sm); } } return dp[0][1]; }
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