oj.uz

답안 #459622

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
459622 2021-08-08T20:53:24 Z nickmet2004 Aesthetic (NOI20_aesthetic) C++11
73 / 100
 815 ms 134588 KB 
#include<bits/stdc++.h>
#define ll long long
using namespace std;
const int N = 3e5 + 5;
ll n , m , au[N] , av[N] , aw[N];
ll u , v , w , A;
vector<pair<ll, pair<ll , ll> > >  adj[N];
ll d1[N] , dn[N] , f[N] , par[N] , path[N] , son[N];
priority_queue<pair<ll , ll> > pq;
multiset<pair<ll , ll>> S;
vector<ll> B[N] , T[N];
void q(int x){
    f[x] = 1;
    for(auto y : adj[x]){
        //cout << "h";
        auto it = S.find({dn[y.first] + y.second.first + d1[x] , y.second.second});
        if(f[y.first]) S.erase(it);
        else S.insert({dn[x] + y.second.first + d1[y.first] , y.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);
    scanf("%lld%lld" , &n , &m);
    for(int i  =0; i <m; ++i) scanf("%lld%lld%lld" , &au[i] , &av[i], &aw[i]);
    for(int i = m - 1; ~i; --i){
        u = au[i] , v = av[i] , w= aw[i];
        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;
    pq.push({0 , 1});
    while(pq.size()){
        auto T = pq.top(); pq.pop();
        u = T.second , w = -T.first;
        if(f[u])continue;
        f[u] = 1;
        for(auto e : adj[u]){
            v = e.first;
            if(!f[v] && d1[v] > w + e.second.first){
                par[v] = u;
                d1[v] = w + e.second.first;
                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()){
        auto T = pq.top(); pq.pop();
        u = T.second , w = -T.first;
        if(f[u])continue;
        f[u] = 1;
        for(auto e : adj[u]){
            v = e.first;
            if(!f[v] && dn[v] > w + e.second.first){
                dn[v]= w + e.second.first;
                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;
    u = n;
    ll ans = d1[n];
    //cout << "ka";
    ll k;
    while(1){
        //cout << "ha";
        if(u == 1)break;
        for(ll v : T[u]) q(v);
        u = par[u];
        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;
    printf("%lld" ,ans);
}

Compilation message

Aesthetic.cpp:27:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   27 | main (){
      | ^~~~
Aesthetic.cpp: In function 'int main()':
Aesthetic.cpp:29:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   29 |     scanf("%lld%lld" , &n , &m);
      |     ~~~~~^~~~~~~~~~~~~~~~~~~~~~
Aesthetic.cpp:30:36: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   30 |     for(int i  =0; i <m; ++i) scanf("%lld%lld%lld" , &au[i] , &av[i], &aw[i]);
      |                               ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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 21444 KB Output is correct
3 Correct 12 ms 21536 KB Output is correct
4 Correct 12 ms 21548 KB Output is correct
5 Correct 12 ms 21452 KB Output is correct
6 Correct 12 ms 21452 KB Output is correct
7 Correct 13 ms 21452 KB Output is correct
8 Correct 12 ms 21452 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 21444 KB Output is correct
3 Correct 12 ms 21536 KB Output is correct
4 Correct 12 ms 21548 KB Output is correct
5 Correct 12 ms 21452 KB Output is correct
6 Correct 12 ms 21452 KB Output is correct
7 Correct 13 ms 21452 KB Output is correct
8 Correct 12 ms 21452 KB Output is correct
9 Correct 13 ms 21844 KB Output is correct
10 Correct 13 ms 21836 KB Output is correct
11 Correct 13 ms 21708 KB Output is correct
12 Correct 13 ms 21708 KB Output is correct
13 Correct 15 ms 21708 KB Output is correct
14 Correct 15 ms 21708 KB Output is correct
15 Correct 13 ms 21708 KB Output is correct
16 Correct 14 ms 21780 KB Output is correct

Subtask #3
7.0 / 7.0

# 결과 실행 시간 메모리 Grader output
1 Correct 699 ms 70068 KB Output is correct
2 Correct 709 ms 69512 KB Output is correct
3 Correct 686 ms 69712 KB Output is correct
4 Correct 714 ms 69972 KB Output is correct
5 Correct 692 ms 70196 KB Output is correct
6 Correct 703 ms 71316 KB Output is correct
7 Correct 753 ms 70772 KB Output is correct
8 Correct 713 ms 71416 KB Output is correct

Subtask #4
15.0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 709 ms 71716 KB Output is correct
2 Correct 695 ms 70532 KB Output is correct
3 Correct 709 ms 68872 KB Output is correct
4 Correct 761 ms 71072 KB Output is correct
5 Correct 720 ms 70664 KB Output is correct
6 Correct 723 ms 71412 KB Output is correct
7 Correct 696 ms 70628 KB Output is correct
8 Correct 719 ms 70900 KB Output is correct

Subtask #5
16.0 / 16.0

# 결과 실행 시간 메모리 Grader output
1 Correct 543 ms 64888 KB Output is correct
2 Correct 294 ms 68764 KB Output is correct
3 Correct 267 ms 59848 KB Output is correct
4 Correct 256 ms 58752 KB Output is correct
5 Correct 249 ms 58340 KB Output is correct
6 Correct 289 ms 59724 KB Output is correct
7 Correct 245 ms 57988 KB Output is correct
8 Correct 249 ms 58556 KB Output is correct
9 Correct 260 ms 57500 KB Output is correct
10 Correct 268 ms 60592 KB Output is correct
11 Correct 254 ms 58172 KB Output is correct
12 Correct 599 ms 65600 KB Output is correct
13 Correct 254 ms 58532 KB Output is correct
14 Correct 249 ms 80900 KB Output is correct
15 Correct 184 ms 70728 KB Output is correct
16 Correct 479 ms 64852 KB Output is correct
17 Correct 578 ms 64756 KB Output is correct
18 Correct 444 ms 63152 KB Output is correct
19 Correct 294 ms 69060 KB Output is correct
20 Correct 312 ms 69180 KB Output is correct
21 Correct 291 ms 69060 KB Output is correct
22 Correct 289 ms 69004 KB Output is correct

Subtask #6
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 543 ms 64888 KB Output is correct
2 Correct 294 ms 68764 KB Output is correct
3 Correct 267 ms 59848 KB Output is correct
4 Correct 256 ms 58752 KB Output is correct
5 Correct 249 ms 58340 KB Output is correct
6 Correct 289 ms 59724 KB Output is correct
7 Correct 245 ms 57988 KB Output is correct
8 Correct 249 ms 58556 KB Output is correct
9 Correct 260 ms 57500 KB Output is correct
10 Correct 268 ms 60592 KB Output is correct
11 Correct 254 ms 58172 KB Output is correct
12 Correct 599 ms 65600 KB Output is correct
13 Correct 254 ms 58532 KB Output is correct
14 Correct 249 ms 80900 KB Output is correct
15 Correct 184 ms 70728 KB Output is correct
16 Correct 479 ms 64852 KB Output is correct
17 Correct 578 ms 64756 KB Output is correct
18 Correct 444 ms 63152 KB Output is correct
19 Correct 294 ms 69060 KB Output is correct
20 Correct 312 ms 69180 KB Output is correct
21 Correct 291 ms 69060 KB Output is correct
22 Correct 289 ms 69004 KB Output is correct
23 Correct 709 ms 66112 KB Output is correct
24 Correct 352 ms 69188 KB Output is correct
25 Correct 387 ms 58976 KB Output is correct
26 Correct 358 ms 58472 KB Output is correct
27 Correct 344 ms 58252 KB Output is correct
28 Correct 430 ms 59964 KB Output is correct
29 Correct 422 ms 58632 KB Output is correct
30 Correct 379 ms 59332 KB Output is correct
31 Correct 404 ms 59820 KB Output is correct
32 Correct 379 ms 57980 KB Output is correct
33 Correct 408 ms 59336 KB Output is correct
34 Correct 677 ms 65876 KB Output is correct
35 Correct 395 ms 58500 KB Output is correct
36 Correct 279 ms 83744 KB Output is correct
37 Correct 295 ms 83668 KB Output is correct
38 Correct 662 ms 65576 KB Output is correct
39 Correct 710 ms 65456 KB Output is correct
40 Correct 799 ms 66384 KB Output is correct
41 Correct 385 ms 69080 KB Output is correct
42 Correct 360 ms 69132 KB Output is correct
43 Correct 365 ms 69060 KB Output is correct
44 Correct 362 ms 69492 KB Output is correct

Subtask #7
0 / 27.0

# 결과 실행 시간 메모리 Grader output
1 Correct 12 ms 21452 KB Output is correct
2 Correct 12 ms 21444 KB Output is correct
3 Correct 12 ms 21536 KB Output is correct
4 Correct 12 ms 21548 KB Output is correct
5 Correct 12 ms 21452 KB Output is correct
6 Correct 12 ms 21452 KB Output is correct
7 Correct 13 ms 21452 KB Output is correct
8 Correct 12 ms 21452 KB Output is correct
9 Correct 13 ms 21844 KB Output is correct
10 Correct 13 ms 21836 KB Output is correct
11 Correct 13 ms 21708 KB Output is correct
12 Correct 13 ms 21708 KB Output is correct
13 Correct 15 ms 21708 KB Output is correct
14 Correct 15 ms 21708 KB Output is correct
15 Correct 13 ms 21708 KB Output is correct
16 Correct 14 ms 21780 KB Output is correct
17 Correct 699 ms 70068 KB Output is correct
18 Correct 709 ms 69512 KB Output is correct
19 Correct 686 ms 69712 KB Output is correct
20 Correct 714 ms 69972 KB Output is correct
21 Correct 692 ms 70196 KB Output is correct
22 Correct 703 ms 71316 KB Output is correct
23 Correct 753 ms 70772 KB Output is correct
24 Correct 713 ms 71416 KB Output is correct
25 Correct 709 ms 71716 KB Output is correct
26 Correct 695 ms 70532 KB Output is correct
27 Correct 709 ms 68872 KB Output is correct
28 Correct 761 ms 71072 KB Output is correct
29 Correct 720 ms 70664 KB Output is correct
30 Correct 723 ms 71412 KB Output is correct
31 Correct 696 ms 70628 KB Output is correct
32 Correct 719 ms 70900 KB Output is correct
33 Correct 543 ms 64888 KB Output is correct
34 Correct 294 ms 68764 KB Output is correct
35 Correct 267 ms 59848 KB Output is correct
36 Correct 256 ms 58752 KB Output is correct
37 Correct 249 ms 58340 KB Output is correct
38 Correct 289 ms 59724 KB Output is correct
39 Correct 245 ms 57988 KB Output is correct
40 Correct 249 ms 58556 KB Output is correct
41 Correct 260 ms 57500 KB Output is correct
42 Correct 268 ms 60592 KB Output is correct
43 Correct 254 ms 58172 KB Output is correct
44 Correct 599 ms 65600 KB Output is correct
45 Correct 254 ms 58532 KB Output is correct
46 Correct 249 ms 80900 KB Output is correct
47 Correct 184 ms 70728 KB Output is correct
48 Correct 479 ms 64852 KB Output is correct
49 Correct 578 ms 64756 KB Output is correct
50 Correct 444 ms 63152 KB Output is correct
51 Correct 294 ms 69060 KB Output is correct
52 Correct 312 ms 69180 KB Output is correct
53 Correct 291 ms 69060 KB Output is correct
54 Correct 289 ms 69004 KB Output is correct
55 Correct 709 ms 66112 KB Output is correct
56 Correct 352 ms 69188 KB Output is correct
57 Correct 387 ms 58976 KB Output is correct
58 Correct 358 ms 58472 KB Output is correct
59 Correct 344 ms 58252 KB Output is correct
60 Correct 430 ms 59964 KB Output is correct
61 Correct 422 ms 58632 KB Output is correct
62 Correct 379 ms 59332 KB Output is correct
63 Correct 404 ms 59820 KB Output is correct
64 Correct 379 ms 57980 KB Output is correct
65 Correct 408 ms 59336 KB Output is correct
66 Correct 677 ms 65876 KB Output is correct
67 Correct 395 ms 58500 KB Output is correct
68 Correct 279 ms 83744 KB Output is correct
69 Correct 295 ms 83668 KB Output is correct
70 Correct 662 ms 65576 KB Output is correct
71 Correct 710 ms 65456 KB Output is correct
72 Correct 799 ms 66384 KB Output is correct
73 Correct 385 ms 69080 KB Output is correct
74 Correct 360 ms 69132 KB Output is correct
75 Correct 365 ms 69060 KB Output is correct
76 Correct 362 ms 69492 KB Output is correct
77 Correct 815 ms 66792 KB Output is correct
78 Correct 357 ms 69312 KB Output is correct
79 Correct 463 ms 59232 KB Output is correct
80 Correct 448 ms 57832 KB Output is correct
81 Correct 457 ms 59244 KB Output is correct
82 Correct 466 ms 58928 KB Output is correct
83 Correct 436 ms 58304 KB Output is correct
84 Correct 459 ms 58444 KB Output is correct
85 Correct 413 ms 59452 KB Output is correct
86 Correct 491 ms 59088 KB Output is correct
87 Correct 440 ms 58356 KB Output is correct
88 Correct 610 ms 65680 KB Output is correct
89 Correct 438 ms 58856 KB Output is correct
90 Correct 298 ms 83712 KB Output is correct
91 Correct 352 ms 83708 KB Output is correct
92 Runtime error 799 ms 134588 KB Execution killed with signal 6
93 Halted 0 ms 0 KB -