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Submission #988161

# Submission time Handle Problem Language Result Execution time Memory
988161 2024-05-24T07:32:27 Z 0pt1mus23 Logičari (COCI21_logicari) C++14
110 / 110
 216 ms 170128 KB 
#pragma GCC optimize("O3", "inline")
#include <bits/stdc++.h>
using namespace std;
#define all(v) v.begin(), v.end()
#define ins insert
#define pb push_back
#define int unsigned long long int
#define pii pair<int, int>
#define endl '\n'
#define drop(x) cout<<(x)<<endl;return;
#define reach cerr << "reached >.<!" << endl;
/*
    m : 11059739 -> l ~23
    p : 4567896467
*/
// mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count());
const int mod = 1e9 + 7, sze = 1e6 + 50, inf = 1e6, prime = 2333;

//\\
dp / binary search / greedy / sprase table / segment tree 
//

int root,specialnode,n;
int dp[sze][2][2][2][2];
int p[sze];
int dsu[sze];
vector<int> graph[sze];

int f(int node){
    if(dsu[node]==node){
        return node;
    }
    return dsu[node]=f(dsu[node]);
}


void dfs(int node,int par=0){
    p[node]=par;
    for(auto v:graph[node]){
        if(v!=par){
            dfs(v,node);
        }
    }
}

int kafkef(int node,int me,int pc,int rt,int sp){
    if(dp[node][me][pc][rt][sp]!=-1){
        return dp[node][me][pc][rt][sp];
    }
    if( (node==root && me!=rt) | (node==specialnode&& me!=sp) | (node==specialnode && pc && rt) ){
        return dp[node][me][pc][rt][sp] = inf;
    }
    int ans=inf;

    bool mustwhite = ( pc | (node == root && sp) | (node == specialnode && rt));

    int sum=me;
    for(auto v:graph[node]){
        if(v!=p[node]){
            sum+=kafkef(v,0,me,rt,sp);
        }
    }

    if(mustwhite){
        ans=min(ans,sum);
    }
    else{
        for(auto v:graph[node]){
            if(v!=p[node]){
                ans=min(ans, sum - kafkef(v,0,me,rt,sp)  + kafkef(v,1,me,rt,sp));
            }
        }
    }


    return dp[node][me][pc][rt][sp]=ans;

}

void gkd(){
    memset(dp, -1, sizeof dp);
    int n;
    cin>>n;
    for(int i=1;i<=n;i++){
        dsu[i]=i;
    }
    for(int i=0;i<n;i++){
        int u,v;
        cin>>u>>v;
        int x = f(u);
        int y = f(v);
        if(x==y){
            root=u;
            specialnode=v;
        }
        else{
            dsu[x]=y;
            graph[u].pb(v);
            graph[v].pb(u);
        }
    }
    dfs(root);
    
    int ans=inf;

    for(int i =0 ;i<=1;i++){
        for(int j=0;j<=1;j++){
            ans=min(ans,kafkef(root,i,0,i,j));
        }
    }

    if(ans>=inf){
        drop(-1);
    }
    drop(ans);

}


signed main() {
    cin.tie(0)->sync_with_stdio(0);
    int tt = 1; //cin>>tt;
    while (tt--)gkd();
}

Compilation message

Main.cpp:19:1: warning: multi-line comment [-Wcomment]
   19 | //\\
      | ^
Main.cpp: In function 'long long unsigned int kafkef(long long unsigned int, long long unsigned int, long long unsigned int, long long unsigned int, long long unsigned int)':
Main.cpp:47:32: warning: comparison of integer expressions of different signedness: 'long long unsigned int' and 'int' [-Wsign-compare]
   47 |     if(dp[node][me][pc][rt][sp]!=-1){
      |        ~~~~~~~~~~~~~~~~~~~~~~~~^~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 67 ms 152404 KB Output is correct
2 Correct 54 ms 152404 KB Output is correct
3 Correct 51 ms 152404 KB Output is correct
4 Correct 50 ms 152400 KB Output is correct
5 Correct 207 ms 170068 KB Output is correct
6 Correct 216 ms 170128 KB Output is correct
7 Correct 208 ms 170112 KB Output is correct
8 Correct 211 ms 170108 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 51 ms 152404 KB Output is correct
2 Correct 52 ms 152404 KB Output is correct
3 Correct 54 ms 152524 KB Output is correct
4 Correct 52 ms 152404 KB Output is correct
5 Correct 51 ms 152400 KB Output is correct
6 Correct 52 ms 152400 KB Output is correct
7 Correct 52 ms 152404 KB Output is correct
8 Correct 51 ms 152400 KB Output is correct
9 Correct 53 ms 152400 KB Output is correct
10 Correct 51 ms 152400 KB Output is correct
11 Correct 52 ms 152412 KB Output is correct
12 Correct 52 ms 152352 KB Output is correct

Subtask #3
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 51 ms 152404 KB Output is correct
2 Correct 52 ms 152404 KB Output is correct
3 Correct 54 ms 152524 KB Output is correct
4 Correct 52 ms 152404 KB Output is correct
5 Correct 51 ms 152400 KB Output is correct
6 Correct 52 ms 152400 KB Output is correct
7 Correct 52 ms 152404 KB Output is correct
8 Correct 51 ms 152400 KB Output is correct
9 Correct 53 ms 152400 KB Output is correct
10 Correct 51 ms 152400 KB Output is correct
11 Correct 52 ms 152412 KB Output is correct
12 Correct 52 ms 152352 KB Output is correct
13 Correct 53 ms 152524 KB Output is correct
14 Correct 53 ms 152400 KB Output is correct
15 Correct 53 ms 152456 KB Output is correct
16 Correct 51 ms 152404 KB Output is correct
17 Correct 49 ms 152404 KB Output is correct
18 Correct 53 ms 152368 KB Output is correct
19 Correct 49 ms 152404 KB Output is correct
20 Correct 52 ms 152340 KB Output is correct
21 Correct 51 ms 152480 KB Output is correct
22 Correct 52 ms 152336 KB Output is correct
23 Correct 50 ms 152556 KB Output is correct
24 Correct 49 ms 152400 KB Output is correct

Subtask #4
50.0 / 50.0

# Verdict Execution time Memory Grader output
1 Correct 67 ms 152404 KB Output is correct
2 Correct 54 ms 152404 KB Output is correct
3 Correct 51 ms 152404 KB Output is correct
4 Correct 50 ms 152400 KB Output is correct
5 Correct 207 ms 170068 KB Output is correct
6 Correct 216 ms 170128 KB Output is correct
7 Correct 208 ms 170112 KB Output is correct
8 Correct 211 ms 170108 KB Output is correct
9 Correct 51 ms 152404 KB Output is correct
10 Correct 52 ms 152404 KB Output is correct
11 Correct 54 ms 152524 KB Output is correct
12 Correct 52 ms 152404 KB Output is correct
13 Correct 51 ms 152400 KB Output is correct
14 Correct 52 ms 152400 KB Output is correct
15 Correct 52 ms 152404 KB Output is correct
16 Correct 51 ms 152400 KB Output is correct
17 Correct 53 ms 152400 KB Output is correct
18 Correct 51 ms 152400 KB Output is correct
19 Correct 52 ms 152412 KB Output is correct
20 Correct 52 ms 152352 KB Output is correct
21 Correct 53 ms 152524 KB Output is correct
22 Correct 53 ms 152400 KB Output is correct
23 Correct 53 ms 152456 KB Output is correct
24 Correct 51 ms 152404 KB Output is correct
25 Correct 49 ms 152404 KB Output is correct
26 Correct 53 ms 152368 KB Output is correct
27 Correct 49 ms 152404 KB Output is correct
28 Correct 52 ms 152340 KB Output is correct
29 Correct 51 ms 152480 KB Output is correct
30 Correct 52 ms 152336 KB Output is correct
31 Correct 50 ms 152556 KB Output is correct
32 Correct 49 ms 152400 KB Output is correct
33 Correct 135 ms 157304 KB Output is correct
34 Correct 134 ms 157268 KB Output is correct
35 Correct 136 ms 157392 KB Output is correct
36 Correct 129 ms 157268 KB Output is correct
37 Correct 69 ms 153684 KB Output is correct
38 Correct 153 ms 157484 KB Output is correct
39 Correct 56 ms 152912 KB Output is correct
40 Correct 138 ms 157484 KB Output is correct
41 Correct 135 ms 158404 KB Output is correct
42 Correct 136 ms 158272 KB Output is correct
43 Correct 183 ms 170108 KB Output is correct
44 Correct 176 ms 163996 KB Output is correct