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Submission #873350

# Submission time Handle Problem Language Result Execution time Memory
873350 2023-11-14T21:57:56 Z Yahia_Emara Logičari (COCI21_logicari) C++17
110 / 110
 156 ms 44052 KB 
#include <bits/stdc++.h>
#define pb push_back
#define ctoi(x) int(x-'0')
#define cdv(x,y) (((x)+(y)-1)/(y))
#define LOOP(n) for(int rp=0;rp<(n);rp++)
#define sz(x) int(x.size())
#define dbg(x) cout << (#x) << " : " << x << endl;
#define sq(x) ((x)*(x))
using namespace std;
typedef long long ll;
typedef long double dl;
const int SZ=2e5+7;
int n,dp[SZ][2][2][2][2],X,Y;
bool vs[SZ];
vector<int>G[SZ],g[SZ];
void dfs(int x,int pr=-1){
    vs[x]=1;
    for(auto&i:G[x]){
        if(i==pr)continue;
        if(vs[i])X=x,Y=i;
        else dfs(i,x),g[x].pb(i),g[i].pb(x);
    }
}
int solve(int nd,int pr,int b,int c,int u,int e){
    if(nd==Y){
        if(e+b!=1)return 1e9;
        if(c+u>1)return 1e9;
        c+=u;
    }
    if(pr!=-1&&sz(g[nd])==1){
        if(c==0)return 1e9;
        return b;
    }
    if(dp[nd][b][c][u][e]!=-1)return dp[nd][b][c][u][e];
    ll s=0,mn=2e9;
    for(auto&i:g[nd]){
        if(i==pr)continue;
        s+=ll(solve(i,nd,0,b,u,e));
        mn=min(mn,ll(solve(i,nd,1,b,u,e)-solve(i,nd,0,b,u,e)));
    }
    ll s2=1e9;
    if(nd==X){
        s2=0;
        for(auto&i:g[nd]){
            if(i==pr)continue;
            s2+=ll(solve(i,nd,0,b,u,0));
        }
    }
    return dp[nd][b][c][u][e]=min(ll(1e9),min(c?s:s+mn,s2)+b);
}
int main(){
    ios_base::sync_with_stdio(0);cin.tie(0);
    int tt=1;
    //cin >> tt;
    LOOP(tt){
        cin >> n;
        memset(dp,-1,sizeof(dp));
        for(int i=0;i<n;i++){
            int x,y;cin >> x >> y;
            G[x].pb(y),G[y].pb(x);
        }
        dfs(1);
        int ans=min(solve(X,-1,0,0,0,1),solve(X,-1,1,0,1,1));
        if(ans==1e9)ans=-1;
        cout << ans;
    }
    return 0;
}

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 22364 KB Output is correct
2 Correct 4 ms 22360 KB Output is correct
3 Correct 4 ms 22616 KB Output is correct
4 Correct 4 ms 22436 KB Output is correct
5 Correct 156 ms 44052 KB Output is correct
6 Correct 149 ms 43968 KB Output is correct
7 Correct 136 ms 44032 KB Output is correct
8 Correct 142 ms 44044 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 22420 KB Output is correct
2 Correct 4 ms 22360 KB Output is correct
3 Correct 5 ms 22360 KB Output is correct
4 Correct 5 ms 22364 KB Output is correct
5 Correct 5 ms 22452 KB Output is correct
6 Correct 5 ms 22424 KB Output is correct
7 Correct 4 ms 22364 KB Output is correct
8 Correct 5 ms 22364 KB Output is correct
9 Correct 4 ms 22328 KB Output is correct
10 Correct 4 ms 22364 KB Output is correct
11 Correct 5 ms 22540 KB Output is correct
12 Correct 5 ms 22364 KB Output is correct

Subtask #3
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 22420 KB Output is correct
2 Correct 4 ms 22360 KB Output is correct
3 Correct 5 ms 22360 KB Output is correct
4 Correct 5 ms 22364 KB Output is correct
5 Correct 5 ms 22452 KB Output is correct
6 Correct 5 ms 22424 KB Output is correct
7 Correct 4 ms 22364 KB Output is correct
8 Correct 5 ms 22364 KB Output is correct
9 Correct 4 ms 22328 KB Output is correct
10 Correct 4 ms 22364 KB Output is correct
11 Correct 5 ms 22540 KB Output is correct
12 Correct 5 ms 22364 KB Output is correct
13 Correct 6 ms 22620 KB Output is correct
14 Correct 5 ms 22616 KB Output is correct
15 Correct 5 ms 22456 KB Output is correct
16 Correct 5 ms 22620 KB Output is correct
17 Correct 5 ms 22364 KB Output is correct
18 Correct 6 ms 22620 KB Output is correct
19 Correct 5 ms 22616 KB Output is correct
20 Correct 5 ms 22620 KB Output is correct
21 Correct 6 ms 22424 KB Output is correct
22 Correct 5 ms 22424 KB Output is correct
23 Correct 5 ms 22620 KB Output is correct
24 Correct 5 ms 22632 KB Output is correct

Subtask #4
50.0 / 50.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 22364 KB Output is correct
2 Correct 4 ms 22360 KB Output is correct
3 Correct 4 ms 22616 KB Output is correct
4 Correct 4 ms 22436 KB Output is correct
5 Correct 156 ms 44052 KB Output is correct
6 Correct 149 ms 43968 KB Output is correct
7 Correct 136 ms 44032 KB Output is correct
8 Correct 142 ms 44044 KB Output is correct
9 Correct 5 ms 22420 KB Output is correct
10 Correct 4 ms 22360 KB Output is correct
11 Correct 5 ms 22360 KB Output is correct
12 Correct 5 ms 22364 KB Output is correct
13 Correct 5 ms 22452 KB Output is correct
14 Correct 5 ms 22424 KB Output is correct
15 Correct 4 ms 22364 KB Output is correct
16 Correct 5 ms 22364 KB Output is correct
17 Correct 4 ms 22328 KB Output is correct
18 Correct 4 ms 22364 KB Output is correct
19 Correct 5 ms 22540 KB Output is correct
20 Correct 5 ms 22364 KB Output is correct
21 Correct 6 ms 22620 KB Output is correct
22 Correct 5 ms 22616 KB Output is correct
23 Correct 5 ms 22456 KB Output is correct
24 Correct 5 ms 22620 KB Output is correct
25 Correct 5 ms 22364 KB Output is correct
26 Correct 6 ms 22620 KB Output is correct
27 Correct 5 ms 22616 KB Output is correct
28 Correct 5 ms 22620 KB Output is correct
29 Correct 6 ms 22424 KB Output is correct
30 Correct 5 ms 22424 KB Output is correct
31 Correct 5 ms 22620 KB Output is correct
32 Correct 5 ms 22632 KB Output is correct
33 Correct 95 ms 29160 KB Output is correct
34 Correct 84 ms 29016 KB Output is correct
35 Correct 73 ms 29236 KB Output is correct
36 Correct 74 ms 29236 KB Output is correct
37 Correct 21 ms 24256 KB Output is correct
38 Correct 72 ms 29260 KB Output is correct
39 Correct 12 ms 23224 KB Output is correct
40 Correct 83 ms 29216 KB Output is correct
41 Correct 56 ms 30668 KB Output is correct
42 Correct 45 ms 30552 KB Output is correct
43 Correct 145 ms 44004 KB Output is correct
44 Correct 114 ms 37216 KB Output is correct