Submission #415159

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
415159	2021-05-31 15:27:11	achibasadzishvili	The Xana coup (BOI21_xanadu)	C++17	100 / 100	135 ms	20400 KiB

xanadu

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
#include<bits/stdc++.h>
#define ll long long
#define f first
#define s second
#define pb push_back
using namespace std;
ll n,c[100005];
vector<ll>v[100005];
ll dp[100005][2][2];
void solve(ll x,ll par){
    ll keon = 1e9,luon = 0,keof = 1e9,luof = 0;
    bool ye = 0;
    for(auto to : v[x]){
        if(to == par)continue;
        solve(to , x);
        ye = 1;
        ll wk = keon,wl = luon;
        keon = min(wk + dp[to][0][1] , wl + dp[to][1][1]);
        luon = min(wl + dp[to][0][1] , wk + dp[to][1][1]);
        wk = keof , wl = luof;
        keof = min(wk + dp[to][0][0] , wl + dp[to][1][0]);
        luof = min(wl + dp[to][0][0] , wk + dp[to][1][0]);
    }
    for(int i=0; i<2; i++)
        for(int j=0; j<2; j++)
            dp[x][i][j] = 1e9;
    if(!ye){
        dp[x][0][c[x]] = 0;
        dp[x][1][c[x] ^ 1] = 1;
        return;
 
 
הההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההה
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

• Subtask 1: 5 / 5
• Subtask 2: 15 / 15
• Subtask 3: 10 / 10
• Subtask 4: 40 / 40
• Subtask 5: 30 / 30