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답안 #459651

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
459651 2021-08-08T21:52:26 Z nickmet2004 Aesthetic (NOI20_aesthetic) C++11
100 / 100
 840 ms 83732 KB 
#include<bits/stdc++.h>
#define ll long long
using namespace std;
ll n , m ,A, au[300002] , av[300002] , aw[300002];
vector<pair<ll, pair<ll , ll> > >  adj[300002];
ll d1[300002] , dn[300002] , f[300002] , par[300002] , path[300002] , son[300002];
multiset<pair<ll , ll>> S;
vector<ll> B[300002] , T[300002];
void q(ll x){
    f[x] = 1;
    for(auto j : adj[x]){
        //cout << "h";
        ll y = j.first , l = j.second.first;
        auto it = S.find({dn[y] + l + d1[x] , j.second.second});
        if(f[y]==1) S.erase(it);
        if(f[y] == 0) S.insert({dn[x] + l + d1[y] , j.second.second});
    }
}
void dfs(int u , int p){
    if(path[u]) son[u] = u;
    else son[u] = son[p];
    T[son[u]].emplace_back(u);
    for(int v : B[u]) dfs(v , u);
}
main (){
    ios_base::sync_with_stdio(0); cin.tie(0);
    cin >> n >> m;
    for(int i  =0; i <m; ++i) cin >> au[i] >> av[i] >> aw[i];
    for(int i = m - 1; ~i; --i){
        ll u = au[i] , v = av[i] , w= aw[i];
        if(u != v){
        adj[u].push_back({v , {w , A}});
        adj[v].push_back({u , {w , A}});
        }
        A = max(A , w);
        //cout << "j";
    }

    for(int i = 1; i <= n; ++i) d1[i] = dn[i] = 1e18;
    d1[1] = 0;
    dn[n] = 0;
    priority_queue<pair<ll , ll> > pq;
    pq.push({0 , 1});
    while(pq.size()){
        ll u = pq.top().second;
        pq.pop();
        if(f[u])continue;
        f[u] = 1;
        for(auto e : adj[u]){
            ll v = e.first , l = e.second.first;
            if(!f[v] && d1[v] > d1[u] + l){
                par[v] = u;
                d1[v] = d1[u] + l;
                pq.push({-d1[v] , v});
            }
        }
        //cout << "k";
    }
    for(int i = 1; i <= n; ++i)f[i] = 0;
    //memset(f , 0 ,sizeof(f));
    pq.push({0, n});
    while(pq.size()){
        ll u = pq.top().second;
        pq.pop();
        if(f[u])continue;
        f[u] = 1;
        for(auto e : adj[u]){
            ll v = e.first , l = e.second.first;
            if(!f[v] && dn[v] > dn[u] + l){
                dn[v]= dn[u] + l;
                pq.push({-dn[v] , v});
            }
        }
        //cout << "l";
    }

    ll X = n;
    while(1){
        path[X] = 1;
        if(X == 1) break;
        X = par[X];
        //cout << "n";
    }

    for(int i = 1; i <= n; ++i)B[par[i]].emplace_back(i);
    dfs(1 , 0);

    for(int i = 1; i <= n; ++i) f[i] =0;
    ll s = n;
    ll ans = d1[n];
    //cout << "ka";
    while(1){
        //cout << "ha";
        if(s == 1)break;
        for(ll v : T[s]) q(v);
        s = par[s];
        ll k = S.begin()->first + S.begin()->second;
        auto i = S.begin();
        ++i;
        if(i != S.end()) k =min(k , i->first);
        ans = max(ans , k);
    }
    cout << ans<<endl;

}

Compilation message

Aesthetic.cpp:25:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   25 | main (){
      | ^~~~

Subtask #1
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 12 ms 21452 KB Output is correct
2 Correct 12 ms 21484 KB Output is correct
3 Correct 12 ms 21452 KB Output is correct
4 Correct 12 ms 21452 KB Output is correct
5 Correct 11 ms 21452 KB Output is correct
6 Correct 12 ms 21452 KB Output is correct
7 Correct 12 ms 21528 KB Output is correct
8 Correct 13 ms 21516 KB Output is correct

Subtask #2
8.0 / 8.0

# 결과 실행 시간 메모리 Grader output
1 Correct 12 ms 21452 KB Output is correct
2 Correct 12 ms 21484 KB Output is correct
3 Correct 12 ms 21452 KB Output is correct
4 Correct 12 ms 21452 KB Output is correct
5 Correct 11 ms 21452 KB Output is correct
6 Correct 12 ms 21452 KB Output is correct
7 Correct 12 ms 21528 KB Output is correct
8 Correct 13 ms 21516 KB Output is correct
9 Correct 14 ms 21836 KB Output is correct
10 Correct 16 ms 21776 KB Output is correct
11 Correct 14 ms 21708 KB Output is correct
12 Correct 14 ms 21808 KB Output is correct
13 Correct 13 ms 21708 KB Output is correct
14 Correct 13 ms 21716 KB Output is correct
15 Correct 13 ms 21780 KB Output is correct
16 Correct 14 ms 21800 KB Output is correct

Subtask #3
7.0 / 7.0

# 결과 실행 시간 메모리 Grader output
1 Correct 752 ms 70104 KB Output is correct
2 Correct 794 ms 69660 KB Output is correct
3 Correct 710 ms 69848 KB Output is correct
4 Correct 706 ms 69912 KB Output is correct
5 Correct 723 ms 70188 KB Output is correct
6 Correct 728 ms 71396 KB Output is correct
7 Correct 742 ms 70812 KB Output is correct
8 Correct 727 ms 71444 KB Output is correct

Subtask #4
15.0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 733 ms 71672 KB Output is correct
2 Correct 728 ms 70556 KB Output is correct
3 Correct 718 ms 68860 KB Output is correct
4 Correct 733 ms 70876 KB Output is correct
5 Correct 763 ms 70676 KB Output is correct
6 Correct 802 ms 71476 KB Output is correct
7 Correct 709 ms 70644 KB Output is correct
8 Correct 733 ms 70864 KB Output is correct

Subtask #5
16.0 / 16.0

# 결과 실행 시간 메모리 Grader output
1 Correct 567 ms 64916 KB Output is correct
2 Correct 304 ms 68948 KB Output is correct
3 Correct 296 ms 59848 KB Output is correct
4 Correct 271 ms 58712 KB Output is correct
5 Correct 261 ms 58348 KB Output is correct
6 Correct 290 ms 59716 KB Output is correct
7 Correct 273 ms 58120 KB Output is correct
8 Correct 271 ms 58588 KB Output is correct
9 Correct 248 ms 57512 KB Output is correct
10 Correct 303 ms 60596 KB Output is correct
11 Correct 257 ms 58200 KB Output is correct
12 Correct 636 ms 65560 KB Output is correct
13 Correct 259 ms 58428 KB Output is correct
14 Correct 247 ms 80952 KB Output is correct
15 Correct 178 ms 70696 KB Output is correct
16 Correct 492 ms 64724 KB Output is correct
17 Correct 560 ms 64824 KB Output is correct
18 Correct 465 ms 63092 KB Output is correct
19 Correct 304 ms 69076 KB Output is correct
20 Correct 300 ms 68976 KB Output is correct
21 Correct 327 ms 69084 KB Output is correct
22 Correct 300 ms 68908 KB Output is correct

Subtask #6
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 567 ms 64916 KB Output is correct
2 Correct 304 ms 68948 KB Output is correct
3 Correct 296 ms 59848 KB Output is correct
4 Correct 271 ms 58712 KB Output is correct
5 Correct 261 ms 58348 KB Output is correct
6 Correct 290 ms 59716 KB Output is correct
7 Correct 273 ms 58120 KB Output is correct
8 Correct 271 ms 58588 KB Output is correct
9 Correct 248 ms 57512 KB Output is correct
10 Correct 303 ms 60596 KB Output is correct
11 Correct 257 ms 58200 KB Output is correct
12 Correct 636 ms 65560 KB Output is correct
13 Correct 259 ms 58428 KB Output is correct
14 Correct 247 ms 80952 KB Output is correct
15 Correct 178 ms 70696 KB Output is correct
16 Correct 492 ms 64724 KB Output is correct
17 Correct 560 ms 64824 KB Output is correct
18 Correct 465 ms 63092 KB Output is correct
19 Correct 304 ms 69076 KB Output is correct
20 Correct 300 ms 68976 KB Output is correct
21 Correct 327 ms 69084 KB Output is correct
22 Correct 300 ms 68908 KB Output is correct
23 Correct 687 ms 66284 KB Output is correct
24 Correct 358 ms 69220 KB Output is correct
25 Correct 384 ms 58916 KB Output is correct
26 Correct 360 ms 58488 KB Output is correct
27 Correct 344 ms 58252 KB Output is correct
28 Correct 452 ms 60036 KB Output is correct
29 Correct 391 ms 58796 KB Output is correct
30 Correct 391 ms 59136 KB Output is correct
31 Correct 425 ms 59896 KB Output is correct
32 Correct 388 ms 57720 KB Output is correct
33 Correct 419 ms 59328 KB Output is correct
34 Correct 700 ms 65944 KB Output is correct
35 Correct 413 ms 58480 KB Output is correct
36 Correct 297 ms 83732 KB Output is correct
37 Correct 303 ms 83656 KB Output is correct
38 Correct 681 ms 65504 KB Output is correct
39 Correct 716 ms 65292 KB Output is correct
40 Correct 814 ms 66268 KB Output is correct
41 Correct 365 ms 69184 KB Output is correct
42 Correct 365 ms 69228 KB Output is correct
43 Correct 364 ms 69096 KB Output is correct
44 Correct 362 ms 69204 KB Output is correct

Subtask #7
27.0 / 27.0

# 결과 실행 시간 메모리 Grader output
1 Correct 12 ms 21452 KB Output is correct
2 Correct 12 ms 21484 KB Output is correct
3 Correct 12 ms 21452 KB Output is correct
4 Correct 12 ms 21452 KB Output is correct
5 Correct 11 ms 21452 KB Output is correct
6 Correct 12 ms 21452 KB Output is correct
7 Correct 12 ms 21528 KB Output is correct
8 Correct 13 ms 21516 KB Output is correct
9 Correct 14 ms 21836 KB Output is correct
10 Correct 16 ms 21776 KB Output is correct
11 Correct 14 ms 21708 KB Output is correct
12 Correct 14 ms 21808 KB Output is correct
13 Correct 13 ms 21708 KB Output is correct
14 Correct 13 ms 21716 KB Output is correct
15 Correct 13 ms 21780 KB Output is correct
16 Correct 14 ms 21800 KB Output is correct
17 Correct 752 ms 70104 KB Output is correct
18 Correct 794 ms 69660 KB Output is correct
19 Correct 710 ms 69848 KB Output is correct
20 Correct 706 ms 69912 KB Output is correct
21 Correct 723 ms 70188 KB Output is correct
22 Correct 728 ms 71396 KB Output is correct
23 Correct 742 ms 70812 KB Output is correct
24 Correct 727 ms 71444 KB Output is correct
25 Correct 733 ms 71672 KB Output is correct
26 Correct 728 ms 70556 KB Output is correct
27 Correct 718 ms 68860 KB Output is correct
28 Correct 733 ms 70876 KB Output is correct
29 Correct 763 ms 70676 KB Output is correct
30 Correct 802 ms 71476 KB Output is correct
31 Correct 709 ms 70644 KB Output is correct
32 Correct 733 ms 70864 KB Output is correct
33 Correct 567 ms 64916 KB Output is correct
34 Correct 304 ms 68948 KB Output is correct
35 Correct 296 ms 59848 KB Output is correct
36 Correct 271 ms 58712 KB Output is correct
37 Correct 261 ms 58348 KB Output is correct
38 Correct 290 ms 59716 KB Output is correct
39 Correct 273 ms 58120 KB Output is correct
40 Correct 271 ms 58588 KB Output is correct
41 Correct 248 ms 57512 KB Output is correct
42 Correct 303 ms 60596 KB Output is correct
43 Correct 257 ms 58200 KB Output is correct
44 Correct 636 ms 65560 KB Output is correct
45 Correct 259 ms 58428 KB Output is correct
46 Correct 247 ms 80952 KB Output is correct
47 Correct 178 ms 70696 KB Output is correct
48 Correct 492 ms 64724 KB Output is correct
49 Correct 560 ms 64824 KB Output is correct
50 Correct 465 ms 63092 KB Output is correct
51 Correct 304 ms 69076 KB Output is correct
52 Correct 300 ms 68976 KB Output is correct
53 Correct 327 ms 69084 KB Output is correct
54 Correct 300 ms 68908 KB Output is correct
55 Correct 687 ms 66284 KB Output is correct
56 Correct 358 ms 69220 KB Output is correct
57 Correct 384 ms 58916 KB Output is correct
58 Correct 360 ms 58488 KB Output is correct
59 Correct 344 ms 58252 KB Output is correct
60 Correct 452 ms 60036 KB Output is correct
61 Correct 391 ms 58796 KB Output is correct
62 Correct 391 ms 59136 KB Output is correct
63 Correct 425 ms 59896 KB Output is correct
64 Correct 388 ms 57720 KB Output is correct
65 Correct 419 ms 59328 KB Output is correct
66 Correct 700 ms 65944 KB Output is correct
67 Correct 413 ms 58480 KB Output is correct
68 Correct 297 ms 83732 KB Output is correct
69 Correct 303 ms 83656 KB Output is correct
70 Correct 681 ms 65504 KB Output is correct
71 Correct 716 ms 65292 KB Output is correct
72 Correct 814 ms 66268 KB Output is correct
73 Correct 365 ms 69184 KB Output is correct
74 Correct 365 ms 69228 KB Output is correct
75 Correct 364 ms 69096 KB Output is correct
76 Correct 362 ms 69204 KB Output is correct
77 Correct 840 ms 66720 KB Output is correct
78 Correct 364 ms 69104 KB Output is correct
79 Correct 447 ms 59232 KB Output is correct
80 Correct 446 ms 57908 KB Output is correct
81 Correct 432 ms 59184 KB Output is correct
82 Correct 484 ms 58956 KB Output is correct
83 Correct 465 ms 58316 KB Output is correct
84 Correct 474 ms 58452 KB Output is correct
85 Correct 438 ms 59672 KB Output is correct
86 Correct 451 ms 59196 KB Output is correct
87 Correct 435 ms 58312 KB Output is correct
88 Correct 628 ms 65752 KB Output is correct
89 Correct 433 ms 58944 KB Output is correct
90 Correct 310 ms 83636 KB Output is correct
91 Correct 357 ms 83712 KB Output is correct
92 Correct 839 ms 66408 KB Output is correct
93 Correct 555 ms 64688 KB Output is correct
94 Correct 580 ms 64192 KB Output is correct
95 Correct 395 ms 69248 KB Output is correct
96 Correct 380 ms 69380 KB Output is correct
97 Correct 370 ms 69060 KB Output is correct
98 Correct 373 ms 69148 KB Output is correct