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답안 #1025281

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
1025281 2024-07-16T19:13:39 Z a_l_i_r_e_z_a LOSTIKS (INOI20_lostiks) C++17
59 / 100
 2000 ms 323664 KB 
#include<bits/stdc++.h>
using namespace std;

#pragma GCC optimize("O3,unroll-loops")
// #pragma GCC optimize("avx2")

typedef long long ll;
typedef long double ld;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;

#define pb push_back
#define int long long
#define S second
#define F first
#define mp make_pair
#define smax(xyxy, yxy) (xyxy) = max((xyxy), (yxy))
#define smin(xyxy, yxy) (xyxy) = min((xyxy), (yxy))
#define all(xyxy) (xyxy).begin(), (xyxy).end()
#define len(xyxy) ((int)(xyxy).size())

const int maxn = 2e6 + 5, lg = 22;
const ll inf = 1e15 + 7;
ll n, s, t, w[lg], dp[(1ll << lg)][lg + 1];
pll d[lg + 1][maxn];
vector<pll> adj[maxn];
pll a[lg];

void dfs(int v, int p, int id){
    for(auto [u, e]: adj[v]){
        if(u == p) continue;
        d[id][u].F = d[id][v].F + 1;
        d[id][u].S = d[id][v].S;
        if(e != -1) d[id][u].S += 1ll << e;
        dfs(u, v, id);
    }
}

int32_t main(){
    ios_base::sync_with_stdio(0); cin.tie(0);
    
    cin >> n >> s >> t;
    int m = 0;
    for(int i = 0; i < n - 1; i++){
        int u, v, we; cin >> u >> v >> we;
        if(we == 0){
            adj[u].pb(mp(v, -1));
            adj[v].pb(mp(u, -1));
        }
        else{
            a[m] = mp(u, v);
            adj[u].pb(mp(v, m));
            adj[v].pb(mp(u, m));
            w[m] = we;
            m++;
        }
    }
    dfs(s, 0, m);
    for(int i = 0; i < m; i++){
        int v = a[i].F;
        if(d[m][a[i].S].F < d[m][a[i].F].F) v = a[i].S;
        dfs(v, 0, i);
    }
    for(int mask = (1ll << m) - 1; mask >= 0; mask--){
        for(int i = 0; i <= m; i++){
            dp[mask][i] = inf;
            int m1 = d[i][t].S, h = d[i][t].F;
            if((m1 & mask) == m1){
                dp[mask][i] = d[i][t].F;
                continue;
            }
            for(int j = 0; j < m; j++){
                if(mask & (1ll << j)) continue;
                int res = d[i][w[j]].F;
                int m2 = d[i][w[j]].S;
                if((m2 & mask) == m2){
                    int m3 = d[j][w[j]].S;
                    res += d[j][w[j]].F + dp[mask + (1ll << j)][j];
                    if((m3 & (mask + (1ll << j))) == m3) smin(dp[mask][i], res);
                }
            }
        }
    }
    if(dp[0][m] >= inf) cout << -1 << '\n';
    else cout << dp[0][m] << '\n';

    return 0;
}

Compilation message

Main.cpp: In function 'int32_t main()':
Main.cpp:67:33: warning: unused variable 'h' [-Wunused-variable]
   67 |             int m1 = d[i][t].S, h = d[i][t].F;
      |                                 ^

Subtask #1
23.0 / 23.0

# 결과 실행 시간 메모리 Grader output
1 Correct 8 ms 49752 KB Output is correct
2 Correct 8 ms 49756 KB Output is correct
3 Correct 70 ms 75556 KB Output is correct
4 Correct 59 ms 76344 KB Output is correct
5 Correct 83 ms 76636 KB Output is correct
6 Correct 62 ms 76372 KB Output is correct
7 Correct 59 ms 76368 KB Output is correct
8 Correct 62 ms 76624 KB Output is correct
9 Correct 59 ms 76372 KB Output is correct
10 Correct 63 ms 76368 KB Output is correct
11 Correct 61 ms 76368 KB Output is correct
12 Correct 78 ms 75860 KB Output is correct
13 Correct 56 ms 77140 KB Output is correct
14 Correct 56 ms 77904 KB Output is correct
15 Correct 56 ms 76880 KB Output is correct
16 Correct 55 ms 77388 KB Output is correct
17 Correct 58 ms 78300 KB Output is correct
18 Correct 57 ms 77648 KB Output is correct
19 Correct 59 ms 79496 KB Output is correct
20 Correct 58 ms 78672 KB Output is correct
21 Correct 61 ms 80232 KB Output is correct
22 Correct 9 ms 49752 KB Output is correct
23 Correct 8 ms 49756 KB Output is correct
24 Correct 8 ms 49832 KB Output is correct
25 Correct 9 ms 49756 KB Output is correct
26 Correct 8 ms 49756 KB Output is correct

Subtask #2
36.0 / 36.0

# 결과 실행 시간 메모리 Grader output
1 Correct 8 ms 49756 KB Output is correct
2 Correct 8 ms 49844 KB Output is correct
3 Correct 9 ms 50008 KB Output is correct
4 Correct 10 ms 50012 KB Output is correct
5 Correct 480 ms 146776 KB Output is correct
6 Correct 512 ms 146892 KB Output is correct
7 Correct 466 ms 146768 KB Output is correct
8 Correct 496 ms 146812 KB Output is correct
9 Correct 433 ms 146772 KB Output is correct
10 Correct 476 ms 146768 KB Output is correct
11 Correct 490 ms 146772 KB Output is correct
12 Correct 435 ms 146776 KB Output is correct
13 Correct 467 ms 147076 KB Output is correct
14 Correct 426 ms 146768 KB Output is correct
15 Correct 441 ms 146768 KB Output is correct
16 Correct 386 ms 146776 KB Output is correct
17 Correct 419 ms 146768 KB Output is correct
18 Correct 406 ms 147024 KB Output is correct
19 Correct 414 ms 146768 KB Output is correct
20 Correct 420 ms 146768 KB Output is correct
21 Correct 457 ms 146772 KB Output is correct
22 Correct 429 ms 146984 KB Output is correct
23 Correct 428 ms 147028 KB Output is correct
24 Correct 469 ms 147084 KB Output is correct
25 Correct 518 ms 237140 KB Output is correct

Subtask #3
0 / 41.0

# 결과 실행 시간 메모리 Grader output
1 Correct 8 ms 49752 KB Output is correct
2 Correct 8 ms 49756 KB Output is correct
3 Correct 70 ms 75556 KB Output is correct
4 Correct 59 ms 76344 KB Output is correct
5 Correct 83 ms 76636 KB Output is correct
6 Correct 62 ms 76372 KB Output is correct
7 Correct 59 ms 76368 KB Output is correct
8 Correct 62 ms 76624 KB Output is correct
9 Correct 59 ms 76372 KB Output is correct
10 Correct 63 ms 76368 KB Output is correct
11 Correct 61 ms 76368 KB Output is correct
12 Correct 78 ms 75860 KB Output is correct
13 Correct 56 ms 77140 KB Output is correct
14 Correct 56 ms 77904 KB Output is correct
15 Correct 56 ms 76880 KB Output is correct
16 Correct 55 ms 77388 KB Output is correct
17 Correct 58 ms 78300 KB Output is correct
18 Correct 57 ms 77648 KB Output is correct
19 Correct 59 ms 79496 KB Output is correct
20 Correct 58 ms 78672 KB Output is correct
21 Correct 61 ms 80232 KB Output is correct
22 Correct 9 ms 49752 KB Output is correct
23 Correct 8 ms 49756 KB Output is correct
24 Correct 8 ms 49832 KB Output is correct
25 Correct 9 ms 49756 KB Output is correct
26 Correct 8 ms 49756 KB Output is correct
27 Correct 8 ms 49756 KB Output is correct
28 Correct 8 ms 49844 KB Output is correct
29 Correct 9 ms 50008 KB Output is correct
30 Correct 10 ms 50012 KB Output is correct
31 Correct 480 ms 146776 KB Output is correct
32 Correct 512 ms 146892 KB Output is correct
33 Correct 466 ms 146768 KB Output is correct
34 Correct 496 ms 146812 KB Output is correct
35 Correct 433 ms 146772 KB Output is correct
36 Correct 476 ms 146768 KB Output is correct
37 Correct 490 ms 146772 KB Output is correct
38 Correct 435 ms 146776 KB Output is correct
39 Correct 467 ms 147076 KB Output is correct
40 Correct 426 ms 146768 KB Output is correct
41 Correct 441 ms 146768 KB Output is correct
42 Correct 386 ms 146776 KB Output is correct
43 Correct 419 ms 146768 KB Output is correct
44 Correct 406 ms 147024 KB Output is correct
45 Correct 414 ms 146768 KB Output is correct
46 Correct 420 ms 146768 KB Output is correct
47 Correct 457 ms 146772 KB Output is correct
48 Correct 429 ms 146984 KB Output is correct
49 Correct 428 ms 147028 KB Output is correct
50 Correct 469 ms 147084 KB Output is correct
51 Correct 518 ms 237140 KB Output is correct
52 Correct 1684 ms 274660 KB Output is correct
53 Execution timed out 2045 ms 323664 KB Time limit exceeded
54 Halted 0 ms 0 KB -