제출 #129500

#제출 시각아이디문제언어결과실행 시간메모리
129500antimirage친구 (IOI14_friend)C++14
0 / 100
3 ms632 KiB
#include "friend.h" //#include "grader.cpp" #include <bits/stdc++.h> #define fr first #define sc second #define mk make_pair #define pb push_back #define all(s) s.begin(), s.end() using namespace std; const int N = 1005; vector <int> g[N]; int u[N], dp[N][2], ans; void dfs (int v) { u[v] = 1; dp[v][1] = 1; for (auto to : g[v]) { if (u[to] == 0) dfs(to); dp[v][1] += dp[to][0]; dp[v][0] += max(dp[to][0], dp[to][1]); } } int findSample(int n, int val[], int batya[], int type[]) { assert(val[0] == 1); for (int i = 1; i < n; i++) { assert(val[i] == 1); if (type[i] == 0) { g[batya[i]].pb(i); g[i].pb(batya[i]); } else if (type[i] == 1) { for (auto it: g[batya[i]]) { g[i].pb(it); g[it].pb(i); } } else assert(0); } for (int i = 0; i < n; i++) { if (u[i]) continue; dfs(i); ans += max(dp[i][0], dp[i][1]); } return ans; }
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