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답안 #540364

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
540364 2022-03-20T06:46:49 Z BadPenalty Logičari (COCI21_logicari) C++14
110 / 110
 202 ms 33176 KB 
#include <bits/stdc++.h>

using namespace std;

typedef long long ll;
#define F first
#define S second
#define pb push_back
#define endl '\n'
#define all(x) x.begin(),x.end()
#define yes cout<<"Yes"<<endl
#define no cout<<"No"<<endl
const int N = 1e5+10,mod = 1e9+7;

vector<int>adj[N];
int head[N],par[N];
int root,special;
ll dp[N][2][2][2][2];
int st(int x)
{
    if(x==head[x])return x;
    return head[x] = st(head[x]);
}

void dfs(int x,int pr)
{
    par[x] = pr;
    for(auto u:adj[x])
    {
        if(u == pr)continue;
        dfs(u,x);
    }
}

int calc(int nd,int me,int up,int rt,int sp)
{
    if(dp[nd][me][up][rt][sp]!=-1)
        return dp[nd][me][up][rt][sp];

    bool tr = 1;
    if(nd==special && rt &&up)tr = 0;
    if(nd==root && me!=rt)tr = 0;
    if(nd==special && me!=sp)tr = 0;
    if(!tr)
        return dp[nd][me][up][rt][sp] = mod;

    bool cmp = 0;
    if(up)cmp = 1;
    if(nd==root&&sp)cmp = 1;
    if(nd==special&&rt)cmp = 1;

    ll sum = me;
    for(auto u:adj[nd])
    {
        if(u==par[nd])continue;
        sum+=calc(u,0,me,rt,sp);
    }

    ll res = mod;
    if(cmp)
    {
        res = min(res,sum);
    }
    else
    {
        for(auto u:adj[nd])
        {
            if(u==par[nd])continue;
            ll val = sum - calc(u,0,me,rt,sp) + calc(u,1,me,rt,sp);
            res = min(res,val);
        }
    }
    return dp[nd][me][up][rt][sp] = res;


}

void solve()
{
    int sol = mod;
    for (int rt = 0; rt <= 1; rt++) {
        for (int sp = 0; sp <= 1; sp++) {
            sol = min(sol, calc(root, rt, 0, rt, sp));
        }
    }
    if (sol == mod) cout << -1; else cout << sol;
}


int main()
{
    ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0);
    int n;
    cin>>n;

    for(int i = 0;i<=n;i++)
        head[i] = i;
    for(int i = 0;i<n;i++)
    {
        int a,b;
        cin>>a>>b;

        int pa = st(a);
        int pb = st(b);

        if(pa==pb)
        {
            root = a;
            special = b;
        }
        else
        {
            head[pa] = pb;
            adj[a].pb(b);
            adj[b].pb(a);
        }
    }
    dfs(root,0);
    ll ans = mod;

    memset(dp,-1,sizeof dp);
    solve();

    return 0;
}
/*

*/

Compilation message

Main.cpp: In function 'int main()':
Main.cpp:119:8: warning: unused variable 'ans' [-Wunused-variable]
  119 |     ll ans = mod;
      |        ^~~

Subtask #1
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 7 ms 15188 KB Output is correct
2 Correct 7 ms 15188 KB Output is correct
3 Correct 6 ms 15196 KB Output is correct
4 Correct 6 ms 15104 KB Output is correct
5 Correct 189 ms 33172 KB Output is correct
6 Correct 183 ms 33148 KB Output is correct
7 Correct 202 ms 33176 KB Output is correct
8 Correct 187 ms 33176 KB Output is correct

Subtask #2
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 7 ms 15188 KB Output is correct
2 Correct 7 ms 15192 KB Output is correct
3 Correct 7 ms 15188 KB Output is correct
4 Correct 7 ms 15188 KB Output is correct
5 Correct 7 ms 15188 KB Output is correct
6 Correct 7 ms 15180 KB Output is correct
7 Correct 7 ms 15188 KB Output is correct
8 Correct 6 ms 15188 KB Output is correct
9 Correct 7 ms 15188 KB Output is correct
10 Correct 7 ms 15188 KB Output is correct
11 Correct 6 ms 15188 KB Output is correct
12 Correct 7 ms 15188 KB Output is correct

Subtask #3
40.0 / 40.0

# 결과 실행 시간 메모리 Grader output
1 Correct 7 ms 15188 KB Output is correct
2 Correct 7 ms 15192 KB Output is correct
3 Correct 7 ms 15188 KB Output is correct
4 Correct 7 ms 15188 KB Output is correct
5 Correct 7 ms 15188 KB Output is correct
6 Correct 7 ms 15180 KB Output is correct
7 Correct 7 ms 15188 KB Output is correct
8 Correct 6 ms 15188 KB Output is correct
9 Correct 7 ms 15188 KB Output is correct
10 Correct 7 ms 15188 KB Output is correct
11 Correct 6 ms 15188 KB Output is correct
12 Correct 7 ms 15188 KB Output is correct
13 Correct 7 ms 15192 KB Output is correct
14 Correct 7 ms 15236 KB Output is correct
15 Correct 8 ms 15188 KB Output is correct
16 Correct 7 ms 15188 KB Output is correct
17 Correct 8 ms 15136 KB Output is correct
18 Correct 8 ms 15188 KB Output is correct
19 Correct 7 ms 15100 KB Output is correct
20 Correct 7 ms 15240 KB Output is correct
21 Correct 9 ms 15188 KB Output is correct
22 Correct 11 ms 15188 KB Output is correct
23 Correct 8 ms 15316 KB Output is correct
24 Correct 8 ms 15188 KB Output is correct

Subtask #4
50.0 / 50.0

# 결과 실행 시간 메모리 Grader output
1 Correct 7 ms 15188 KB Output is correct
2 Correct 7 ms 15188 KB Output is correct
3 Correct 6 ms 15196 KB Output is correct
4 Correct 6 ms 15104 KB Output is correct
5 Correct 189 ms 33172 KB Output is correct
6 Correct 183 ms 33148 KB Output is correct
7 Correct 202 ms 33176 KB Output is correct
8 Correct 187 ms 33176 KB Output is correct
9 Correct 7 ms 15188 KB Output is correct
10 Correct 7 ms 15192 KB Output is correct
11 Correct 7 ms 15188 KB Output is correct
12 Correct 7 ms 15188 KB Output is correct
13 Correct 7 ms 15188 KB Output is correct
14 Correct 7 ms 15180 KB Output is correct
15 Correct 7 ms 15188 KB Output is correct
16 Correct 6 ms 15188 KB Output is correct
17 Correct 7 ms 15188 KB Output is correct
18 Correct 7 ms 15188 KB Output is correct
19 Correct 6 ms 15188 KB Output is correct
20 Correct 7 ms 15188 KB Output is correct
21 Correct 7 ms 15192 KB Output is correct
22 Correct 7 ms 15236 KB Output is correct
23 Correct 8 ms 15188 KB Output is correct
24 Correct 7 ms 15188 KB Output is correct
25 Correct 8 ms 15136 KB Output is correct
26 Correct 8 ms 15188 KB Output is correct
27 Correct 7 ms 15100 KB Output is correct
28 Correct 7 ms 15240 KB Output is correct
29 Correct 9 ms 15188 KB Output is correct
30 Correct 11 ms 15188 KB Output is correct
31 Correct 8 ms 15316 KB Output is correct
32 Correct 8 ms 15188 KB Output is correct
33 Correct 110 ms 18712 KB Output is correct
34 Correct 122 ms 18716 KB Output is correct
35 Correct 115 ms 18636 KB Output is correct
36 Correct 110 ms 18588 KB Output is correct
37 Correct 27 ms 16084 KB Output is correct
38 Correct 120 ms 18788 KB Output is correct
39 Correct 14 ms 15520 KB Output is correct
40 Correct 112 ms 18700 KB Output is correct
41 Correct 72 ms 19788 KB Output is correct
42 Correct 85 ms 19404 KB Output is correct
43 Correct 146 ms 33080 KB Output is correct
44 Correct 129 ms 26304 KB Output is correct