Submission #400959

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
400959	2021-05-08 22:21:33	Hegdahl	The Xana coup (BOI21_xanadu)	C++17	100 / 100	90 ms	32560 KiB

xanadu

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#include <bits/stdc++.h>
#define ar array
using namespace std;
using ll = long long;
const ll INF = 1e9;
const int mxN = 1e5;
vector<int> g[mxN];
int a[mxN];
// 0b(pressed)(state)
ar<ll, 4> solve(int cur, int prv) {
  int kid_cnt = 0;
  for (int nxt : g[cur]) {
    if (nxt == prv) continue;
    ++kid_cnt;
  }
  if (!kid_cnt) {
    ar<ll, 4> ret {INF, INF, INF, INF};
    if (a[cur]) {
      ret[0b01] = 0;
      ret[0b10] = 1;
    } else {
      ret[0b00] = 0;
      ret[0b11] = 1;
    }
    /*
 
 
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• Subtask 1: 5 / 5
• Subtask 2: 15 / 15
• Subtask 3: 10 / 10
• Subtask 4: 40 / 40
• Subtask 5: 30 / 30