Submission #73859

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
73859	2018-08-29 07:00:54	funcsr	Friend (IOI14_friend)	C++17	69 / 100	137 ms	17408 KiB

friend

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#include "friend.h"
#include <vector>
#include <cassert>
#include <tuple>
#define rep(i, n) for (int i=0; i<(n); i++)
#define pb push_back
using namespace std;
typedef pair<int, int> P;
vector<int> Gchildren[200000];
vector<int> Gclone[200000];
int repr[100000];
int W[200000];
bool both[200000];
P dfs(int x, int p) {
  int dp0 = 0, dp1 = W[x];
  for (int t : Gchildren[x]) if (t != p) {
    int dp0t, dp1t;
    tie(dp0t, dp1t) = dfs(t, x);
    dp0 += dp1t;
    dp1 += dp0t;
  }
  if (!Gclone[x].empty()) {
    assert(Gclone[x].size() == 2);
    int t1 = Gclone[x][0], t2 = Gclone[x][1];
    int dp0t1, dp1t1;
    tie(dp0t1, dp1t1) = dfs(t1, x);
    int dp0t2, dp1t2;
    tie(dp0t2, dp1t2) = dfs(t2, x);
 
 
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• Subtask 1: 11 / 11
• Subtask 2: 8 / 8
• Subtask 3: 8 / 8
• Subtask 4: 19 / 19
• Subtask 5: 23 / 23
• Subtask 6: 0 / 31