제출 #280412

#제출 시각아이디문제언어결과실행 시간메모리
280412ajpiano친구 (IOI14_friend)C++14
35 / 100
52 ms7424 KiB
#include <bits/stdc++.h> #include <friend.h> #pragma GCC optimize("O3") #pragma GCC target("sse4") using namespace std; #define FOR(a,b) for(int a=0;a<b;a++) #define F0R(a,b,c) for(int a = b; a<=c; a++) #define f first #define s second #define m0(x) memset(x,0,sizeof(x)) typedef pair<int,int> pi; typedef long long ll; typedef vector<int> vi; typedef vector<pi> vpi; int findSample(int n, int conf[], int host[], int pr[]){ vi edges[n]; F0R(i,1,n-1) edges[host[i]].push_back(i); vpi dp(n); for(int i = n-1; i >= 0; i--){ int tc = 0, cc = 0; int given = 0; for(auto &a: edges[i]){ if(pr[a] == 0){ tc += dp[a].f; given += dp[a].s; } else tc += dp[a].s; } dp[i].s = tc; dp[i].f = conf[i]; int upl = 0; for(auto &a: edges[i]){ if(pr[a] == 0){ cc += dp[a].f; }else if(pr[a] == 1){ cc += dp[a].s; upl += dp[a].f; dp[i].f = max(dp[i].f, upl + max(tc-cc,conf[i])); }else{ cc += dp[a].s; dp[i].f = max(dp[i].f, dp[a].f + upl + tc-cc); } } dp[i].f += given; dp[i].f = max(dp[i].f,dp[i].s); } return dp[0].f; } // //void grader(){ // int n; cin >> n; // int conf[n],host[n],pr[n]; // FOR(i,n) cin >> conf[i]; // F0R(i,1,n-1) cin >> host[i] >> pr[i]; // cout << "Answer: " << findSample(n,conf,host,pr); //} // //int main() //{ // ios_base::sync_with_stdio(0); cin.tie(0); // grader(); // return 0; //}
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