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Submission #1069268

# Submission time Handle Problem Language Result Execution time Memory
1069268 2024-08-21T18:34:53 Z Essa2006 Fire (BOI24_fire) C++14
31 / 100
 2000 ms 1648 KB 
#include<bits/stdc++.h>
using namespace std;
#define ll long long 
#define endl '\n'
#define FF first
#define SS second
#define all(a) a.begin(), a.end()
#define mod (ll)(1000000007)
   
 
int main() {
    ios_base::sync_with_stdio(0);cin.tie(0);
    
    int n, m;
    cin >> n >> m;
    
    vector<int> All;
    All.reserve(2 * n);
    
    vector<array<int, 2>> A(n);
    for (int i = 0; i < n; i++) {
        cin >> A[i][0] >> A[i][1];
        
        All.push_back(A[i][0]);
        All.push_back(A[i][1]);
    }
    
    sort(all(All));
    map<int, int> new_;
    int cnt = 0;
    for (int i = 0; i < All.size(); i++) {
        if (!i || All[i] != All[i - 1]) {
            new_[All[i]] = cnt++;
        }
    }
    int sz = cnt;
    
    for (int i = 0; i < n; i++) {
        A[i][0] = new_[A[i][0]], A[i][1] = new_[A[i][1]];
    }
    
    int ans = n + 1;
    for (int k = 0; k < All.size(); k++) {
        if (k && All[k] == All[k - 1]) {
            continue;
        }
        
        int cur = new_[All[k]];
        vector<array<int, 2>> B = A;
        
        vector<vector<int>> Events(sz + 1);
        for (int i = 0; i < n; i++) {
            if (A[i][0] >= cur) {
                A[i][0] -= cur;
            }   
            else {
                A[i][0] += sz - cur;
            }
            if (A[i][1] >= cur) {
                A[i][1] -= cur;
            }   
            else {
                A[i][1] += sz - cur;
            }
            
            if (A[i][0] > A[i][1]) {
                A[i][1] = sz;
            }
            
            Events[A[i][0]].push_back(i);
            Events[A[i][1]].push_back(i);
        }
        
        
        vector<int> Prf(sz + 1, n + 1), Suf(sz + 1, n + 1);
        vector<array<int, 2>> Stk;
        
        Prf[0] = 0;
        Stk.push_back({0, Prf[0]});  
        for (int i = 1; i <= sz; i++) {
            int mn = i;
            for (auto j : Events[i]) {
                if (i != A[j][1]) {
                    continue;
                }
                
                mn = min(mn, A[j][0]);
                
            }
            if (mn != i) {
                array<int, 2> kj = {mn, -1};
                array<int, 2> res = *lower_bound(all(Stk), kj);
                Prf[i] = min(Prf[i], res[1] + 1);
            }
            while (!Stk.empty() && Prf[i] <= Stk.back()[1]) {
                Stk.pop_back();
            }
            Stk.push_back({i, Prf[i]});
        }
        
        Stk.clear();
        Suf[sz] = 0;
        Stk.push_back({sz - sz, Suf[sz]});
        for (int i = sz; i >= 0; i--) {
            int mx = i;
            for (auto j : Events[i]) {
                if (i != A[j][0]) {
                    continue;
                }
                
                mx = max(mx, A[j][1]);
            }
            if (mx != i) {
                array<int, 2> kj = {sz - mx, -1};
                array<int, 2> res = *lower_bound(all(Stk), kj);
                Suf[i] = min(Suf[i], res[1] + 1);
            }
            while (!Stk.empty() && Suf[i] <= Stk.back()[1]) {
                Stk.pop_back();
            }
            Stk.push_back({sz - i, Suf[i]});
        }
        
        for (int i = 1; i <= sz; i++) {
            Suf[i] = min(Suf[i], Suf[i - 1]);
        }
        for (int i = sz - 1; i >= 0; i--) {
            Prf[i] = min(Prf[i], Prf[i + 1]);
        }
        
        for (int i = 0; i <= sz; i++) {
            ans = min(ans, Prf[i] + Suf[i]);
        }
        
        swap(A, B);
    }
    if (ans == n + 1) { 
        ans = -1;
    }
    cout << ans;
}

Compilation message

Main.cpp: In function 'int main()':
Main.cpp:31:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   31 |     for (int i = 0; i < All.size(); i++) {
      |                     ~~^~~~~~~~~~~~
Main.cpp:43:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   43 |     for (int k = 0; k < All.size(); k++) {
      |                     ~~^~~~~~~~~~~~

Subtask #1
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 1 ms 344 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 1 ms 344 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 1 ms 348 KB Output is correct
20 Correct 1 ms 348 KB Output is correct
21 Correct 0 ms 348 KB Output is correct
22 Correct 0 ms 348 KB Output is correct
23 Correct 1 ms 348 KB Output is correct

Subtask #2
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 1 ms 344 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 1 ms 344 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 1 ms 348 KB Output is correct
20 Correct 1 ms 348 KB Output is correct
21 Correct 0 ms 348 KB Output is correct
22 Correct 0 ms 348 KB Output is correct
23 Correct 1 ms 348 KB Output is correct
24 Correct 2 ms 348 KB Output is correct
25 Correct 25 ms 348 KB Output is correct
26 Correct 24 ms 516 KB Output is correct
27 Correct 10 ms 348 KB Output is correct
28 Correct 24 ms 536 KB Output is correct
29 Correct 22 ms 528 KB Output is correct
30 Correct 9 ms 344 KB Output is correct
31 Correct 6 ms 348 KB Output is correct
32 Correct 10 ms 348 KB Output is correct
33 Correct 10 ms 344 KB Output is correct
34 Correct 10 ms 508 KB Output is correct
35 Correct 23 ms 532 KB Output is correct
36 Correct 23 ms 348 KB Output is correct
37 Correct 26 ms 508 KB Output is correct
38 Correct 9 ms 348 KB Output is correct

Subtask #3
0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 1 ms 344 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 1 ms 344 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 1 ms 348 KB Output is correct
20 Correct 1 ms 348 KB Output is correct
21 Correct 0 ms 348 KB Output is correct
22 Correct 0 ms 348 KB Output is correct
23 Correct 1 ms 348 KB Output is correct
24 Correct 2 ms 348 KB Output is correct
25 Correct 25 ms 348 KB Output is correct
26 Correct 24 ms 516 KB Output is correct
27 Correct 10 ms 348 KB Output is correct
28 Correct 24 ms 536 KB Output is correct
29 Correct 22 ms 528 KB Output is correct
30 Correct 9 ms 344 KB Output is correct
31 Correct 6 ms 348 KB Output is correct
32 Correct 10 ms 348 KB Output is correct
33 Correct 10 ms 344 KB Output is correct
34 Correct 10 ms 508 KB Output is correct
35 Correct 23 ms 532 KB Output is correct
36 Correct 23 ms 348 KB Output is correct
37 Correct 26 ms 508 KB Output is correct
38 Correct 9 ms 348 KB Output is correct
39 Execution timed out 2070 ms 1648 KB Time limit exceeded
40 Halted 0 ms 0 KB -

Subtask #4
0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 1 ms 344 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 10 ms 504 KB Output is correct
10 Correct 21 ms 348 KB Output is correct
11 Correct 8 ms 344 KB Output is correct
12 Correct 7 ms 484 KB Output is correct
13 Correct 10 ms 504 KB Output is correct
14 Correct 24 ms 348 KB Output is correct
15 Execution timed out 2035 ms 1644 KB Time limit exceeded
16 Halted 0 ms 0 KB -

Subtask #5
0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 1 ms 344 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 23 ms 536 KB Output is correct
9 Correct 10 ms 500 KB Output is correct
10 Correct 22 ms 524 KB Output is correct
11 Correct 10 ms 348 KB Output is correct
12 Execution timed out 2093 ms 1648 KB Time limit exceeded
13 Halted 0 ms 0 KB -

Subtask #6
0 / 26.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 1 ms 344 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 1 ms 344 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 1 ms 348 KB Output is correct
20 Correct 1 ms 348 KB Output is correct
21 Correct 0 ms 348 KB Output is correct
22 Correct 0 ms 348 KB Output is correct
23 Correct 1 ms 348 KB Output is correct
24 Correct 2 ms 348 KB Output is correct
25 Correct 25 ms 348 KB Output is correct
26 Correct 24 ms 516 KB Output is correct
27 Correct 10 ms 348 KB Output is correct
28 Correct 24 ms 536 KB Output is correct
29 Correct 22 ms 528 KB Output is correct
30 Correct 9 ms 344 KB Output is correct
31 Correct 6 ms 348 KB Output is correct
32 Correct 10 ms 348 KB Output is correct
33 Correct 10 ms 344 KB Output is correct
34 Correct 10 ms 508 KB Output is correct
35 Correct 23 ms 532 KB Output is correct
36 Correct 23 ms 348 KB Output is correct
37 Correct 26 ms 508 KB Output is correct
38 Correct 9 ms 348 KB Output is correct
39 Execution timed out 2070 ms 1648 KB Time limit exceeded
40 Halted 0 ms 0 KB -