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답안 #1110131

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
1110131 2024-11-08T19:38:46 Z vladilius Bulldozer (JOI17_bulldozer) C++17
80 / 100
 822 ms 35936 KB 
#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using ld = long double;
using pii = pair<int, int>;
#define pb push_back
#define ff first
#define ss second
 
struct ST{
    struct node{
        ll pr, sf, mx, s;
    };
    vector<node> t;
    int n;
    ST(int ns){
        n = ns;
        t.resize(4 * n);
    }
    void upd(int v, int tl, int tr, int& p, int& x){
        if (tl == tr){
            t[v].s = x;
            t[v].pr = t[v].sf = t[v].mx = max(0, x);
            return;
        }
        int tm = (tl + tr) / 2, vv = 2 * v;
        if (p <= tm){
            upd(vv, tl, tm, p, x);
        }
        else {
            upd(vv + 1, tm + 1, tr, p, x);
        }
        t[v].s = t[vv].s + t[vv + 1].s;
        t[v].mx = max({t[vv].mx, t[vv + 1].mx, t[vv].sf + t[vv + 1].pr});
        t[v].pr = max(t[vv].pr, t[vv].s + t[vv + 1].pr);
        t[v].sf = max(t[vv + 1].sf, t[vv + 1].s + t[vv].sf);
    }
    void upd(int p, int x){
        upd(1, 1, n, p, x);
    }
    ll get(){
        return t[1].mx;
    }
};
 
int main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    
    int n; cin>>n;
    vector<int> x(n + 1), y(n + 1), a(n + 1), f = {0};
    for (int i = 1; i <= n; i++){
        cin>>x[i]>>y[i]>>a[i];
        f.pb(i);
    }
    
    auto cmp = [&](int i, int j){
        if (x[i] == x[j]){
            return y[i] < y[j];
        }
        return x[i] < x[j];
    };
    sort(f.begin() + 1, f.end(), cmp);
    vector<int> p(n + 1);
    for (int i = 1; i <= n; i++){
        p[f[i]] = i;
    }
    ST T(n);
    for (int i = 1; i <= n; i++){
        T.upd(p[i], a[i]);
    }
    ll out = T.get();
    
    vector<pair<pii, pii>> all;
    for (int i = 1; i <= n; i++){
        for (int j = i + 1; j <= n; j++){
            if (x[f[i]] != x[f[j]]){
                all.pb({{y[f[j]] - y[f[i]], x[f[j]] - x[f[i]]}, {f[i], f[j]}});
            }
        }
    }
    
    auto cmp1 = [&](pair<pii, pii> a, pair<pii, pii> b){
        auto [u1, v1] = a.ff;
        auto [u2, v2] = b.ff;
        return 1LL * u1 * v2 < 1LL * u2 * v1;
    };
    
    sort(all.begin(), all.end(), cmp1);
    vector<bool> used(n + 1);
    vector<pair<ld, int>> ff;
    vector<int> pp;
    int i = 0;
    while (i < all.size()){
        int j = i;
        while (j < all.size() && (1LL * all[i].ff.ff * all[j].ff.ss) == (1LL * all[i].ff.ss * all[j].ff.ff)){
            j++;
        }
        
        ld d = 1.0 * all[i].ff.ff / all[i].ff.ss + 1e-8;
        ff.clear(); pp.clear();
        for (int k = i; k < j; k++){
            auto [u, v] = all[k].ss;
            if (!used[u]){
                used[u] = 1;
                ff.pb({1.0 * y[u] - d * x[u], u});
                pp.pb(p[u]);
            }
            if (!used[v]){
                used[v] = 1;
                ff.pb({1.0 * y[v] - d * x[v], v});
                pp.pb(p[v]);
            }
        }
        sort(ff.begin(), ff.end());
        sort(pp.begin(), pp.end());
        for (int i = 0; i < pp.size(); i++){
            p[ff[i].ss] = pp[i];
            T.upd(pp[i], a[ff[i].ss]);
        }
        for (int k = i; k < j; k++){
            auto [u, v] = all[k].ss;
            used[u] = used[v] = 0;
        }
        
        out = max(out, T.get());
        i = j;
    }
    
    cout<<out<<"\n";
}

Compilation message

bulldozer.cpp: In function 'int main()':
bulldozer.cpp:95:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<std::pair<int, int>, std::pair<int, int> > >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   95 |     while (i < all.size()){
      |            ~~^~~~~~~~~~~~
bulldozer.cpp:97:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<std::pair<int, int>, std::pair<int, int> > >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   97 |         while (j < all.size() && (1LL * all[i].ff.ff * all[j].ff.ss) == (1LL * all[i].ff.ss * all[j].ff.ff)){
      |                ~~^~~~~~~~~~~~
bulldozer.cpp:118:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  118 |         for (int i = 0; i < pp.size(); i++){
      |                         ~~^~~~~~~~~~~

Subtask #1
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 592 KB Output is correct
2 Correct 1 ms 592 KB Output is correct
3 Correct 1 ms 592 KB Output is correct
4 Correct 1 ms 592 KB Output is correct
5 Correct 1 ms 592 KB Output is correct
6 Correct 1 ms 764 KB Output is correct
7 Correct 1 ms 592 KB Output is correct
8 Correct 1 ms 820 KB Output is correct
9 Correct 1 ms 760 KB Output is correct
10 Correct 1 ms 592 KB Output is correct
11 Correct 1 ms 336 KB Output is correct
12 Correct 1 ms 336 KB Output is correct
13 Correct 1 ms 336 KB Output is correct
14 Correct 1 ms 336 KB Output is correct
15 Correct 1 ms 336 KB Output is correct

Subtask #2
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 592 KB Output is correct
2 Correct 2 ms 592 KB Output is correct
3 Correct 3 ms 592 KB Output is correct
4 Correct 3 ms 592 KB Output is correct
5 Correct 3 ms 592 KB Output is correct
6 Correct 2 ms 592 KB Output is correct
7 Correct 2 ms 592 KB Output is correct
8 Correct 2 ms 592 KB Output is correct
9 Correct 2 ms 592 KB Output is correct
10 Correct 2 ms 592 KB Output is correct
11 Correct 1 ms 336 KB Output is correct
12 Correct 1 ms 336 KB Output is correct
13 Correct 1 ms 508 KB Output is correct
14 Correct 1 ms 336 KB Output is correct
15 Correct 1 ms 336 KB Output is correct
16 Correct 1 ms 336 KB Output is correct
17 Correct 1 ms 336 KB Output is correct
18 Correct 1 ms 336 KB Output is correct
19 Correct 1 ms 336 KB Output is correct
20 Correct 1 ms 336 KB Output is correct
21 Correct 2 ms 592 KB Output is correct
22 Correct 2 ms 592 KB Output is correct
23 Correct 2 ms 688 KB Output is correct
24 Correct 2 ms 592 KB Output is correct
25 Correct 2 ms 592 KB Output is correct
26 Correct 2 ms 592 KB Output is correct
27 Correct 2 ms 592 KB Output is correct
28 Correct 2 ms 592 KB Output is correct
29 Correct 2 ms 592 KB Output is correct
30 Correct 2 ms 592 KB Output is correct
31 Correct 2 ms 592 KB Output is correct
32 Correct 3 ms 592 KB Output is correct

Subtask #3
35.0 / 35.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 592 KB Output is correct
2 Correct 2 ms 592 KB Output is correct
3 Correct 3 ms 592 KB Output is correct
4 Correct 3 ms 592 KB Output is correct
5 Correct 3 ms 592 KB Output is correct
6 Correct 2 ms 592 KB Output is correct
7 Correct 2 ms 592 KB Output is correct
8 Correct 2 ms 592 KB Output is correct
9 Correct 2 ms 592 KB Output is correct
10 Correct 2 ms 592 KB Output is correct
11 Correct 1 ms 336 KB Output is correct
12 Correct 1 ms 336 KB Output is correct
13 Correct 1 ms 508 KB Output is correct
14 Correct 1 ms 336 KB Output is correct
15 Correct 1 ms 336 KB Output is correct
16 Correct 1 ms 336 KB Output is correct
17 Correct 1 ms 336 KB Output is correct
18 Correct 1 ms 336 KB Output is correct
19 Correct 1 ms 336 KB Output is correct
20 Correct 1 ms 336 KB Output is correct
21 Correct 2 ms 592 KB Output is correct
22 Correct 2 ms 592 KB Output is correct
23 Correct 2 ms 688 KB Output is correct
24 Correct 2 ms 592 KB Output is correct
25 Correct 2 ms 592 KB Output is correct
26 Correct 2 ms 592 KB Output is correct
27 Correct 2 ms 592 KB Output is correct
28 Correct 2 ms 592 KB Output is correct
29 Correct 2 ms 592 KB Output is correct
30 Correct 2 ms 592 KB Output is correct
31 Correct 2 ms 592 KB Output is correct
32 Correct 3 ms 592 KB Output is correct
33 Correct 791 ms 35764 KB Output is correct
34 Correct 799 ms 35764 KB Output is correct
35 Correct 801 ms 35764 KB Output is correct
36 Correct 806 ms 35764 KB Output is correct
37 Correct 822 ms 35564 KB Output is correct
38 Correct 807 ms 35764 KB Output is correct
39 Correct 805 ms 35764 KB Output is correct
40 Correct 779 ms 35764 KB Output is correct
41 Correct 788 ms 35764 KB Output is correct
42 Correct 778 ms 35936 KB Output is correct
43 Correct 792 ms 35764 KB Output is correct
44 Correct 815 ms 35728 KB Output is correct
45 Correct 773 ms 35724 KB Output is correct
46 Correct 778 ms 35764 KB Output is correct
47 Correct 792 ms 35764 KB Output is correct
48 Correct 772 ms 35764 KB Output is correct
49 Correct 767 ms 35732 KB Output is correct
50 Correct 763 ms 35764 KB Output is correct
51 Correct 777 ms 35764 KB Output is correct
52 Correct 784 ms 35764 KB Output is correct
53 Correct 779 ms 35764 KB Output is correct
54 Correct 784 ms 35764 KB Output is correct

Subtask #4
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 592 KB Output is correct
2 Correct 2 ms 592 KB Output is correct
3 Correct 3 ms 592 KB Output is correct
4 Correct 3 ms 592 KB Output is correct
5 Correct 3 ms 592 KB Output is correct
6 Correct 2 ms 592 KB Output is correct
7 Correct 2 ms 592 KB Output is correct
8 Correct 2 ms 592 KB Output is correct
9 Correct 2 ms 592 KB Output is correct
10 Correct 2 ms 592 KB Output is correct
11 Correct 1 ms 336 KB Output is correct
12 Correct 1 ms 336 KB Output is correct
13 Correct 1 ms 508 KB Output is correct
14 Correct 1 ms 336 KB Output is correct
15 Correct 1 ms 336 KB Output is correct
16 Correct 1 ms 336 KB Output is correct
17 Correct 1 ms 336 KB Output is correct
18 Correct 1 ms 336 KB Output is correct
19 Correct 1 ms 336 KB Output is correct
20 Correct 1 ms 336 KB Output is correct
21 Correct 2 ms 592 KB Output is correct
22 Correct 2 ms 592 KB Output is correct
23 Correct 2 ms 688 KB Output is correct
24 Correct 2 ms 592 KB Output is correct
25 Correct 2 ms 592 KB Output is correct
26 Correct 2 ms 592 KB Output is correct
27 Correct 2 ms 592 KB Output is correct
28 Correct 2 ms 592 KB Output is correct
29 Correct 2 ms 592 KB Output is correct
30 Correct 2 ms 592 KB Output is correct
31 Correct 2 ms 592 KB Output is correct
32 Correct 3 ms 592 KB Output is correct
33 Correct 791 ms 35764 KB Output is correct
34 Correct 799 ms 35764 KB Output is correct
35 Correct 801 ms 35764 KB Output is correct
36 Correct 806 ms 35764 KB Output is correct
37 Correct 822 ms 35564 KB Output is correct
38 Correct 807 ms 35764 KB Output is correct
39 Correct 805 ms 35764 KB Output is correct
40 Correct 779 ms 35764 KB Output is correct
41 Correct 788 ms 35764 KB Output is correct
42 Correct 778 ms 35936 KB Output is correct
43 Correct 792 ms 35764 KB Output is correct
44 Correct 815 ms 35728 KB Output is correct
45 Correct 773 ms 35724 KB Output is correct
46 Correct 778 ms 35764 KB Output is correct
47 Correct 792 ms 35764 KB Output is correct
48 Correct 772 ms 35764 KB Output is correct
49 Correct 767 ms 35732 KB Output is correct
50 Correct 763 ms 35764 KB Output is correct
51 Correct 777 ms 35764 KB Output is correct
52 Correct 784 ms 35764 KB Output is correct
53 Correct 779 ms 35764 KB Output is correct
54 Correct 784 ms 35764 KB Output is correct
55 Correct 804 ms 35764 KB Output is correct
56 Correct 788 ms 35764 KB Output is correct
57 Correct 807 ms 35764 KB Output is correct
58 Correct 795 ms 35764 KB Output is correct
59 Correct 798 ms 35776 KB Output is correct
60 Correct 773 ms 35764 KB Output is correct
61 Correct 776 ms 35764 KB Output is correct
62 Correct 784 ms 35764 KB Output is correct
63 Correct 796 ms 35764 KB Output is correct
64 Correct 769 ms 35756 KB Output is correct
65 Correct 780 ms 35764 KB Output is correct
66 Correct 767 ms 35764 KB Output is correct
67 Correct 791 ms 35756 KB Output is correct
68 Correct 772 ms 35764 KB Output is correct
69 Correct 759 ms 35764 KB Output is correct
70 Correct 774 ms 35764 KB Output is correct
71 Correct 773 ms 35764 KB Output is correct
72 Correct 770 ms 35764 KB Output is correct
73 Correct 805 ms 35764 KB Output is correct
74 Correct 804 ms 35764 KB Output is correct

Subtask #5
0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 592 KB Output is correct
2 Correct 1 ms 592 KB Output is correct
3 Correct 1 ms 592 KB Output is correct
4 Correct 1 ms 592 KB Output is correct
5 Correct 1 ms 592 KB Output is correct
6 Correct 1 ms 764 KB Output is correct
7 Correct 1 ms 592 KB Output is correct
8 Correct 1 ms 820 KB Output is correct
9 Correct 1 ms 760 KB Output is correct
10 Correct 1 ms 592 KB Output is correct
11 Correct 1 ms 336 KB Output is correct
12 Correct 1 ms 336 KB Output is correct
13 Correct 1 ms 336 KB Output is correct
14 Correct 1 ms 336 KB Output is correct
15 Correct 1 ms 336 KB Output is correct
16 Correct 2 ms 592 KB Output is correct
17 Correct 2 ms 592 KB Output is correct
18 Correct 3 ms 592 KB Output is correct
19 Correct 3 ms 592 KB Output is correct
20 Correct 3 ms 592 KB Output is correct
21 Correct 2 ms 592 KB Output is correct
22 Correct 2 ms 592 KB Output is correct
23 Correct 2 ms 592 KB Output is correct
24 Correct 2 ms 592 KB Output is correct
25 Correct 2 ms 592 KB Output is correct
26 Correct 1 ms 336 KB Output is correct
27 Correct 1 ms 336 KB Output is correct
28 Correct 1 ms 508 KB Output is correct
29 Correct 1 ms 336 KB Output is correct
30 Correct 1 ms 336 KB Output is correct
31 Correct 1 ms 336 KB Output is correct
32 Correct 1 ms 336 KB Output is correct
33 Correct 1 ms 336 KB Output is correct
34 Correct 1 ms 336 KB Output is correct
35 Correct 1 ms 336 KB Output is correct
36 Correct 2 ms 592 KB Output is correct
37 Correct 2 ms 592 KB Output is correct
38 Correct 2 ms 688 KB Output is correct
39 Correct 2 ms 592 KB Output is correct
40 Correct 2 ms 592 KB Output is correct
41 Correct 2 ms 592 KB Output is correct
42 Correct 2 ms 592 KB Output is correct
43 Correct 2 ms 592 KB Output is correct
44 Correct 2 ms 592 KB Output is correct
45 Correct 2 ms 592 KB Output is correct
46 Correct 2 ms 592 KB Output is correct
47 Correct 3 ms 592 KB Output is correct
48 Correct 791 ms 35764 KB Output is correct
49 Correct 799 ms 35764 KB Output is correct
50 Correct 801 ms 35764 KB Output is correct
51 Correct 806 ms 35764 KB Output is correct
52 Correct 822 ms 35564 KB Output is correct
53 Correct 807 ms 35764 KB Output is correct
54 Correct 805 ms 35764 KB Output is correct
55 Correct 779 ms 35764 KB Output is correct
56 Correct 788 ms 35764 KB Output is correct
57 Correct 778 ms 35936 KB Output is correct
58 Correct 792 ms 35764 KB Output is correct
59 Correct 815 ms 35728 KB Output is correct
60 Correct 773 ms 35724 KB Output is correct
61 Correct 778 ms 35764 KB Output is correct
62 Correct 792 ms 35764 KB Output is correct
63 Correct 772 ms 35764 KB Output is correct
64 Correct 767 ms 35732 KB Output is correct
65 Correct 763 ms 35764 KB Output is correct
66 Correct 777 ms 35764 KB Output is correct
67 Correct 784 ms 35764 KB Output is correct
68 Correct 779 ms 35764 KB Output is correct
69 Correct 784 ms 35764 KB Output is correct
70 Correct 804 ms 35764 KB Output is correct
71 Correct 788 ms 35764 KB Output is correct
72 Correct 807 ms 35764 KB Output is correct
73 Correct 795 ms 35764 KB Output is correct
74 Correct 798 ms 35776 KB Output is correct
75 Correct 773 ms 35764 KB Output is correct
76 Correct 776 ms 35764 KB Output is correct
77 Correct 784 ms 35764 KB Output is correct
78 Correct 796 ms 35764 KB Output is correct
79 Correct 769 ms 35756 KB Output is correct
80 Correct 780 ms 35764 KB Output is correct
81 Correct 767 ms 35764 KB Output is correct
82 Correct 791 ms 35756 KB Output is correct
83 Correct 772 ms 35764 KB Output is correct
84 Correct 759 ms 35764 KB Output is correct
85 Correct 774 ms 35764 KB Output is correct
86 Correct 773 ms 35764 KB Output is correct
87 Correct 770 ms 35764 KB Output is correct
88 Correct 805 ms 35764 KB Output is correct
89 Correct 804 ms 35764 KB Output is correct
90 Correct 778 ms 35764 KB Output is correct
91 Correct 778 ms 35764 KB Output is correct
92 Correct 791 ms 35764 KB Output is correct
93 Correct 774 ms 35764 KB Output is correct
94 Correct 795 ms 35764 KB Output is correct
95 Correct 780 ms 35764 KB Output is correct
96 Correct 811 ms 35764 KB Output is correct
97 Correct 791 ms 35764 KB Output is correct
98 Correct 782 ms 35764 KB Output is correct
99 Correct 782 ms 35764 KB Output is correct
100 Incorrect 406 ms 19128 KB Output isn't correct
101 Halted 0 ms 0 KB -