oj.uz

Submission #1102409

# Submission time Handle Problem Language Result Execution time Memory
1102409 2024-10-18T04:34:38 Z LTTrungCHL Airplane (NOI23_airplane) C++17
100 / 100
 410 ms 23228 KB 
///***LTT***///
/// ->NHAT QUOC GIA<- ///
#include<bits/stdc++.h>
//#pragma GCC optimize ("O3")
//#pragma GCC optimize ("unroll-loops")
//#pragma GCC target("popcnt")
//#define int long long
#define endl "\n"
#define F first
#define S second
#define pb push_back
using namespace std;
vector <int> lg2;
//void MAKE_LOG_ARR(int n){
//    lg2.resize(n + 3);
//    for (int i = 1;i <= n;++i){
//        lg2[i] = __lg(i);
//    }
//}
const long long oo = 1e9+7;
const int N = 2 * 1e5 + 10;
int n, a[N], m;
vector <int> adj[N];

    priority_queue <pair <long long, int>> pq;
namespace sub2{
    long long dis[N];
    void solve(){
        long long ans = oo * oo;
        for (int i = 1;i <= n;++i){
            for (int j = 1;j <= n;++j){
                dis[j] = oo * oo;
            }
            dis[1] = 0;
            pq.push({0,1});
            while (!pq.empty()){
                int u = pq.top().S;
                long long d = -pq.top().F;
                pq.pop();
                for (int v : adj[u]){
                    if (a[v] > a[i]) continue;
                    int nxt = (d < a[v] ? a[v] : d + 1);
                    if (nxt < dis[v]){
                        dis[v] = nxt;
                        pq.push({-dis[v], v});
                    }
                }
            }
            long long res = dis[i];
            for (int j = 1;j <= n;++j){
                dis[j] = oo * oo;
            }
            dis[n] = 0;
            pq.push({0,n});
            while (!pq.empty()){
                int u = pq.top().S;
                long long d = -pq.top().F;
                pq.pop();
                for (int v : adj[u]){
                    if (a[v] > a[i]) continue;
                    int nxt = (d < a[v] ? a[v] : d + 1);
                    if (nxt < dis[v]){
                        dis[v] = nxt;
                        pq.push({-dis[v], v});
                    }
                }
            }
            res += dis[i];
            ans = min(ans, res);
        }
        cout << ans;
    }
};
namespace sub1{
    long long dis[N], dis2[N];
    void solve(){
        int mx = 1;
        for (int i = 2;i <= n;++i){
            if (a[mx] < a[i]){
                mx = i;
            }
        }
        for (int i = 2;i <= n;++i){
            int nxt = (dis[i - 1] < a[i] ? a[i] : dis[i - 1] + 1);
            dis[i] = nxt;
        }
        for (int i = n - 1;i >= 1;--i){
            int nxt = (dis2[i + 1] < a[i] ? a[i] : dis2[i + 1] + 1);
            dis2[i] = nxt;
        }
        long long ans = oo * oo;
        ans = min(ans, dis[mx] + dis2[mx]);
        cout << ans;
        return;
    }
};
namespace ac{
    long long d1[N], d2[N];
    void solve(){
        for (int i = 1;i <= n;++i){
            d1[i] = oo * oo;
        }
        for (int i = 1;i <= n;++i){
            d2[i] = oo * oo;
        }
        d1[1] = 0;
        d2[n] = 0;
        pq.push({0,1});
        while (!pq.empty()){
            int u = pq.top().S;
            long long d = -pq.top().F;
            pq.pop();
            if (d > d1[u]) continue;
            for (int v : adj[u]){
                int nxt = (d < a[v] ? a[v] : d + 1);
                if (nxt < d1[v]){
                    d1[v] = nxt;
                    pq.push({-d1[v], v});
                }
            }
        }
        pq.push({0,n});
        while (!pq.empty()){
            int u = pq.top().S;
            long long d = -pq.top().F;
            pq.pop();
            if (d > d2[u]) continue;
            for (int v : adj[u]){
                int nxt = (d < a[v] ? a[v] : d + 1);
                if (nxt < d2[v]){
                    d2[v] = nxt;
                    pq.push({-d2[v], v});
                }
            }
        }
        long long ans = oo * oo;
        for (int i = 1;i <= n;++i){
            ans = min(ans, max(d1[i], d2[i]) * 2);
            for (int v : adj[i]){
                ans = min(ans, max(d1[i], d2[v]) * 2 + 1);
            }
        }
        cout << ans;
        return;
    }
};
void solve(){
    cin >> n >> m;
    for (int i = 1;i <= n;++i){
        cin >> a[i];
    }
    bool cksub1 = true;
    for (int i = 1;i <= m;++i){
        int u, v;
        cin >> u >> v;
        adj[u].pb(v);
        adj[v].pb(u);
        if (v != u + 1){
            cksub1 = false;
        }
    }
    if (m == n - 1 and cksub1){
        sub1::solve();
        return;
    }
    if (n <= 2000 and m <= 4000){
        sub2::solve();
        return;
    }
    ac::solve();
    return;
}
int main(){
    ios_base::sync_with_stdio(NULL);
    cin.tie(NULL);
    cout.tie(NULL);
    if (fopen("ltt.inp", "r")){
        freopen("ltt.inp", "r", stdin);
        freopen("ltt.out", "w", stdout);
    }
//    int t;
//    cin >> t;
//    while(t--){
    solve();
//    }
    return 0;
}

Compilation message

Main.cpp: In function 'int main()':
Main.cpp:178:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  178 |         freopen("ltt.inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~
Main.cpp:179:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  179 |         freopen("ltt.out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
22.0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 6480 KB Output is correct
2 Correct 45 ms 17668 KB Output is correct
3 Correct 47 ms 17480 KB Output is correct
4 Correct 48 ms 17628 KB Output is correct
5 Correct 46 ms 17736 KB Output is correct
6 Correct 54 ms 17664 KB Output is correct
7 Correct 49 ms 17536 KB Output is correct
8 Correct 2 ms 6480 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 6480 KB Output is correct
2 Correct 2 ms 8540 KB Output is correct
3 Correct 2 ms 8528 KB Output is correct
4 Correct 2 ms 8528 KB Output is correct
5 Correct 2 ms 8528 KB Output is correct
6 Correct 12 ms 8788 KB Output is correct
7 Correct 78 ms 8784 KB Output is correct
8 Correct 31 ms 8784 KB Output is correct
9 Correct 197 ms 8784 KB Output is correct
10 Correct 47 ms 8784 KB Output is correct
11 Correct 213 ms 8784 KB Output is correct
12 Correct 69 ms 8784 KB Output is correct
13 Correct 250 ms 8792 KB Output is correct
14 Correct 312 ms 8800 KB Output is correct
15 Correct 410 ms 8784 KB Output is correct
16 Correct 389 ms 8784 KB Output is correct
17 Correct 388 ms 8784 KB Output is correct
18 Correct 2 ms 6480 KB Output is correct

Subtask #3
31.0 / 31.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 6480 KB Output is correct
2 Correct 2 ms 8540 KB Output is correct
3 Correct 2 ms 8528 KB Output is correct
4 Correct 2 ms 8528 KB Output is correct
5 Correct 2 ms 8528 KB Output is correct
6 Correct 12 ms 8788 KB Output is correct
7 Correct 78 ms 8784 KB Output is correct
8 Correct 31 ms 8784 KB Output is correct
9 Correct 197 ms 8784 KB Output is correct
10 Correct 47 ms 8784 KB Output is correct
11 Correct 213 ms 8784 KB Output is correct
12 Correct 69 ms 8784 KB Output is correct
13 Correct 250 ms 8792 KB Output is correct
14 Correct 312 ms 8800 KB Output is correct
15 Correct 410 ms 8784 KB Output is correct
16 Correct 389 ms 8784 KB Output is correct
17 Correct 388 ms 8784 KB Output is correct
18 Correct 2 ms 6480 KB Output is correct
19 Correct 58 ms 8784 KB Output is correct
20 Correct 21 ms 8784 KB Output is correct
21 Correct 79 ms 8784 KB Output is correct
22 Correct 144 ms 8784 KB Output is correct
23 Correct 25 ms 8952 KB Output is correct
24 Correct 98 ms 8784 KB Output is correct
25 Correct 179 ms 8784 KB Output is correct
26 Correct 277 ms 8784 KB Output is correct
27 Correct 312 ms 8784 KB Output is correct
28 Correct 255 ms 8832 KB Output is correct
29 Correct 345 ms 8784 KB Output is correct
30 Correct 336 ms 8784 KB Output is correct

Subtask #4
37.0 / 37.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 6480 KB Output is correct
2 Correct 45 ms 17668 KB Output is correct
3 Correct 47 ms 17480 KB Output is correct
4 Correct 48 ms 17628 KB Output is correct
5 Correct 46 ms 17736 KB Output is correct
6 Correct 54 ms 17664 KB Output is correct
7 Correct 49 ms 17536 KB Output is correct
8 Correct 2 ms 6480 KB Output is correct
9 Correct 2 ms 6480 KB Output is correct
10 Correct 2 ms 8540 KB Output is correct
11 Correct 2 ms 8528 KB Output is correct
12 Correct 2 ms 8528 KB Output is correct
13 Correct 2 ms 8528 KB Output is correct
14 Correct 12 ms 8788 KB Output is correct
15 Correct 78 ms 8784 KB Output is correct
16 Correct 31 ms 8784 KB Output is correct
17 Correct 197 ms 8784 KB Output is correct
18 Correct 47 ms 8784 KB Output is correct
19 Correct 213 ms 8784 KB Output is correct
20 Correct 69 ms 8784 KB Output is correct
21 Correct 250 ms 8792 KB Output is correct
22 Correct 312 ms 8800 KB Output is correct
23 Correct 410 ms 8784 KB Output is correct
24 Correct 389 ms 8784 KB Output is correct
25 Correct 388 ms 8784 KB Output is correct
26 Correct 2 ms 6480 KB Output is correct
27 Correct 58 ms 8784 KB Output is correct
28 Correct 21 ms 8784 KB Output is correct
29 Correct 79 ms 8784 KB Output is correct
30 Correct 144 ms 8784 KB Output is correct
31 Correct 25 ms 8952 KB Output is correct
32 Correct 98 ms 8784 KB Output is correct
33 Correct 179 ms 8784 KB Output is correct
34 Correct 277 ms 8784 KB Output is correct
35 Correct 312 ms 8784 KB Output is correct
36 Correct 255 ms 8832 KB Output is correct
37 Correct 345 ms 8784 KB Output is correct
38 Correct 336 ms 8784 KB Output is correct
39 Correct 96 ms 17896 KB Output is correct
40 Correct 79 ms 18000 KB Output is correct
41 Correct 77 ms 17992 KB Output is correct
42 Correct 92 ms 17992 KB Output is correct
43 Correct 77 ms 17996 KB Output is correct
44 Correct 77 ms 17892 KB Output is correct
45 Correct 87 ms 18000 KB Output is correct
46 Correct 83 ms 17992 KB Output is correct
47 Correct 85 ms 18024 KB Output is correct
48 Correct 94 ms 17992 KB Output is correct
49 Correct 120 ms 18004 KB Output is correct
50 Correct 108 ms 17860 KB Output is correct
51 Correct 96 ms 18024 KB Output is correct
52 Correct 154 ms 19664 KB Output is correct
53 Correct 137 ms 19648 KB Output is correct
54 Correct 154 ms 19700 KB Output is correct
55 Correct 148 ms 19648 KB Output is correct
56 Correct 176 ms 23108 KB Output is correct
57 Correct 194 ms 23188 KB Output is correct
58 Correct 181 ms 23152 KB Output is correct
59 Correct 181 ms 23228 KB Output is correct
60 Correct 170 ms 23228 KB Output is correct
61 Correct 201 ms 23144 KB Output is correct
62 Correct 169 ms 23228 KB Output is correct
63 Correct 159 ms 23080 KB Output is correct
64 Correct 177 ms 23228 KB Output is correct
65 Correct 163 ms 23228 KB Output is correct
66 Correct 181 ms 23228 KB Output is correct
67 Correct 174 ms 23228 KB Output is correct