oj.uz

답안 #143209

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
143209 2019-08-13T11:03:37 Z mlyean00 Arranging Shoes (IOI19_shoes) C++14
100 / 100
 291 ms 140196 KB 
#pragma GCC optimize("Ofast")
#include <bits/stdc++.h>

#include "shoes.h"

using namespace std;
using ll = long long;

int sgn(int x) {
    if (x == 0) return 0;
    return x > 0 ? 1 : -1;
}

ll count_inversions(vector<int>& v, int l, int r) {
    if (r - l == 1) return 0;
    int mid = (l + r) / 2;
    ll ans = count_inversions(v, l, mid) + count_inversions(v, mid, r);

    int l_ptr = l, r_ptr = mid;

    vector<int> m;
    m.reserve(r - l);

    while (l_ptr < mid || r_ptr < r) {
        if (l_ptr == mid) {
            m.push_back(v[r_ptr++]);
        } else if (r_ptr == r) {
            ans += r_ptr - mid;
            m.push_back(v[l_ptr++]);
        } else if (v[l_ptr] <= v[r_ptr]) {
            ans += r_ptr - mid;
            m.push_back(v[l_ptr++]);
        } else {
            m.push_back(v[r_ptr++]);
        }
    }

    copy(m.begin(), m.end(), v.begin() + l);

    return ans;
}

ll count_swaps(vector<int> s) {
    int n = s.size() / 2;

    vector<int> v {0};
    for (int x : s) {
        if (x > 0) v.push_back(x);
    }
    sort(v.begin(), v.end());
    v.erase(unique(v.begin(), v.end()), v.end());

    for (int i = 0; i < 2 * n; ++i) {
        int k = sgn(s[i]);
        s[i] = k * (lower_bound(v.begin(), v.end(), abs(s[i])) - v.begin());
    }

    vector<int> t;

    vector<int> cnt(v.size());
    for (int i = 0; i < 2 * n; ++i) {
        int sz = abs(s[i]);
        if (cnt[sz] == 0 || sgn(s[i]) == sgn(cnt[sz])) {
            t.push_back(-sz);
            t.push_back(sz);
        }
        cnt[sz] += sgn(s[i]);
    }

    int offset = v.size() - 1;
    vector<stack<int>> st(2 * v.size() - 1);
    for (int i = 2 * n - 1; i >= 0; --i) {
        st[s[i] + offset].push(i);
    }

    vector<int> perm(2 * n);
    for (int i = 0; i < 2 * n; ++i) {
        perm[i] = st[t[i] + offset].top();
        st[t[i] + offset].pop();
    }

    return count_inversions(perm, 0, 2 * n);
}

Subtask #1
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 256 KB Output is correct
2 Correct 2 ms 376 KB Output is correct

Subtask #2
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 256 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 256 KB Output is correct
4 Correct 2 ms 256 KB Output is correct
5 Correct 2 ms 376 KB Output is correct
6 Correct 2 ms 348 KB Output is correct
7 Correct 2 ms 376 KB Output is correct
8 Correct 2 ms 376 KB Output is correct
9 Correct 2 ms 256 KB Output is correct
10 Correct 2 ms 256 KB Output is correct
11 Correct 2 ms 376 KB Output is correct
12 Correct 2 ms 376 KB Output is correct
13 Correct 2 ms 256 KB Output is correct
14 Correct 2 ms 376 KB Output is correct
15 Correct 2 ms 376 KB Output is correct
16 Correct 2 ms 376 KB Output is correct
17 Correct 2 ms 256 KB Output is correct
18 Correct 2 ms 256 KB Output is correct
19 Correct 2 ms 376 KB Output is correct
20 Correct 3 ms 376 KB Output is correct
21 Correct 2 ms 376 KB Output is correct
22 Correct 2 ms 256 KB Output is correct
23 Correct 3 ms 256 KB Output is correct
24 Correct 2 ms 376 KB Output is correct
25 Correct 2 ms 376 KB Output is correct
26 Correct 2 ms 380 KB Output is correct
27 Correct 2 ms 252 KB Output is correct
28 Correct 2 ms 376 KB Output is correct
29 Correct 2 ms 376 KB Output is correct
30 Correct 2 ms 380 KB Output is correct
31 Correct 2 ms 372 KB Output is correct
32 Correct 2 ms 256 KB Output is correct
33 Correct 2 ms 376 KB Output is correct
34 Correct 2 ms 376 KB Output is correct
35 Correct 2 ms 256 KB Output is correct
36 Correct 2 ms 376 KB Output is correct

Subtask #3
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 256 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 376 KB Output is correct
4 Correct 2 ms 256 KB Output is correct
5 Correct 2 ms 376 KB Output is correct
6 Correct 2 ms 376 KB Output is correct
7 Correct 2 ms 376 KB Output is correct
8 Correct 2 ms 252 KB Output is correct
9 Correct 2 ms 380 KB Output is correct
10 Correct 2 ms 376 KB Output is correct
11 Correct 2 ms 376 KB Output is correct
12 Correct 2 ms 376 KB Output is correct
13 Correct 2 ms 256 KB Output is correct
14 Correct 2 ms 376 KB Output is correct
15 Correct 2 ms 256 KB Output is correct
16 Correct 2 ms 376 KB Output is correct
17 Correct 2 ms 300 KB Output is correct
18 Correct 3 ms 376 KB Output is correct
19 Correct 3 ms 376 KB Output is correct
20 Correct 8 ms 888 KB Output is correct
21 Correct 8 ms 888 KB Output is correct
22 Correct 66 ms 5524 KB Output is correct
23 Correct 60 ms 5496 KB Output is correct
24 Correct 65 ms 5484 KB Output is correct
25 Correct 61 ms 5536 KB Output is correct
26 Correct 66 ms 5484 KB Output is correct
27 Correct 60 ms 5516 KB Output is correct
28 Correct 63 ms 5484 KB Output is correct
29 Correct 60 ms 5524 KB Output is correct
30 Correct 60 ms 5612 KB Output is correct
31 Correct 65 ms 5484 KB Output is correct
32 Correct 60 ms 5484 KB Output is correct
33 Correct 59 ms 5484 KB Output is correct
34 Correct 62 ms 5484 KB Output is correct
35 Correct 2 ms 376 KB Output is correct
36 Correct 2 ms 376 KB Output is correct
37 Correct 61 ms 5484 KB Output is correct
38 Correct 60 ms 5456 KB Output is correct
39 Correct 59 ms 5404 KB Output is correct

Subtask #4
15.0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 256 KB Output is correct
2 Correct 2 ms 256 KB Output is correct
3 Correct 2 ms 376 KB Output is correct
4 Correct 2 ms 256 KB Output is correct
5 Correct 276 ms 140136 KB Output is correct
6 Correct 108 ms 16840 KB Output is correct
7 Correct 276 ms 140140 KB Output is correct
8 Correct 66 ms 5868 KB Output is correct
9 Correct 277 ms 140012 KB Output is correct
10 Correct 194 ms 72628 KB Output is correct

Subtask #5
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 256 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 256 KB Output is correct
4 Correct 2 ms 256 KB Output is correct
5 Correct 2 ms 376 KB Output is correct
6 Correct 2 ms 348 KB Output is correct
7 Correct 2 ms 376 KB Output is correct
8 Correct 2 ms 376 KB Output is correct
9 Correct 2 ms 256 KB Output is correct
10 Correct 2 ms 256 KB Output is correct
11 Correct 2 ms 376 KB Output is correct
12 Correct 2 ms 376 KB Output is correct
13 Correct 2 ms 256 KB Output is correct
14 Correct 2 ms 376 KB Output is correct
15 Correct 2 ms 376 KB Output is correct
16 Correct 2 ms 376 KB Output is correct
17 Correct 2 ms 256 KB Output is correct
18 Correct 2 ms 256 KB Output is correct
19 Correct 2 ms 376 KB Output is correct
20 Correct 3 ms 376 KB Output is correct
21 Correct 2 ms 376 KB Output is correct
22 Correct 2 ms 256 KB Output is correct
23 Correct 3 ms 256 KB Output is correct
24 Correct 2 ms 376 KB Output is correct
25 Correct 2 ms 376 KB Output is correct
26 Correct 2 ms 380 KB Output is correct
27 Correct 2 ms 252 KB Output is correct
28 Correct 2 ms 376 KB Output is correct
29 Correct 2 ms 376 KB Output is correct
30 Correct 2 ms 380 KB Output is correct
31 Correct 2 ms 372 KB Output is correct
32 Correct 2 ms 256 KB Output is correct
33 Correct 2 ms 376 KB Output is correct
34 Correct 2 ms 376 KB Output is correct
35 Correct 2 ms 256 KB Output is correct
36 Correct 2 ms 376 KB Output is correct
37 Correct 13 ms 380 KB Output is correct
38 Correct 2 ms 376 KB Output is correct
39 Correct 11 ms 504 KB Output is correct
40 Correct 3 ms 632 KB Output is correct
41 Correct 5 ms 1784 KB Output is correct
42 Correct 2 ms 1784 KB Output is correct
43 Correct 5 ms 1528 KB Output is correct
44 Correct 4 ms 1400 KB Output is correct
45 Correct 4 ms 1272 KB Output is correct
46 Correct 4 ms 1144 KB Output is correct
47 Correct 4 ms 888 KB Output is correct
48 Correct 3 ms 760 KB Output is correct
49 Correct 3 ms 632 KB Output is correct
50 Correct 3 ms 376 KB Output is correct
51 Correct 3 ms 376 KB Output is correct
52 Correct 4 ms 1656 KB Output is correct

Subtask #6
15.0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 256 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 256 KB Output is correct
4 Correct 2 ms 256 KB Output is correct
5 Correct 2 ms 376 KB Output is correct
6 Correct 2 ms 348 KB Output is correct
7 Correct 2 ms 376 KB Output is correct
8 Correct 2 ms 376 KB Output is correct
9 Correct 2 ms 256 KB Output is correct
10 Correct 2 ms 256 KB Output is correct
11 Correct 2 ms 376 KB Output is correct
12 Correct 2 ms 376 KB Output is correct
13 Correct 2 ms 256 KB Output is correct
14 Correct 2 ms 376 KB Output is correct
15 Correct 2 ms 376 KB Output is correct
16 Correct 2 ms 376 KB Output is correct
17 Correct 2 ms 256 KB Output is correct
18 Correct 2 ms 256 KB Output is correct
19 Correct 2 ms 376 KB Output is correct
20 Correct 3 ms 376 KB Output is correct
21 Correct 2 ms 376 KB Output is correct
22 Correct 2 ms 256 KB Output is correct
23 Correct 3 ms 256 KB Output is correct
24 Correct 2 ms 376 KB Output is correct
25 Correct 2 ms 376 KB Output is correct
26 Correct 2 ms 380 KB Output is correct
27 Correct 2 ms 252 KB Output is correct
28 Correct 2 ms 376 KB Output is correct
29 Correct 2 ms 376 KB Output is correct
30 Correct 2 ms 380 KB Output is correct
31 Correct 2 ms 372 KB Output is correct
32 Correct 2 ms 256 KB Output is correct
33 Correct 2 ms 376 KB Output is correct
34 Correct 2 ms 376 KB Output is correct
35 Correct 2 ms 256 KB Output is correct
36 Correct 2 ms 376 KB Output is correct
37 Correct 2 ms 376 KB Output is correct
38 Correct 2 ms 256 KB Output is correct
39 Correct 2 ms 376 KB Output is correct
40 Correct 2 ms 376 KB Output is correct
41 Correct 2 ms 376 KB Output is correct
42 Correct 2 ms 252 KB Output is correct
43 Correct 2 ms 380 KB Output is correct
44 Correct 2 ms 376 KB Output is correct
45 Correct 2 ms 376 KB Output is correct
46 Correct 2 ms 376 KB Output is correct
47 Correct 2 ms 256 KB Output is correct
48 Correct 2 ms 376 KB Output is correct
49 Correct 2 ms 256 KB Output is correct
50 Correct 2 ms 376 KB Output is correct
51 Correct 2 ms 300 KB Output is correct
52 Correct 3 ms 376 KB Output is correct
53 Correct 3 ms 376 KB Output is correct
54 Correct 8 ms 888 KB Output is correct
55 Correct 8 ms 888 KB Output is correct
56 Correct 66 ms 5524 KB Output is correct
57 Correct 60 ms 5496 KB Output is correct
58 Correct 65 ms 5484 KB Output is correct
59 Correct 61 ms 5536 KB Output is correct
60 Correct 66 ms 5484 KB Output is correct
61 Correct 60 ms 5516 KB Output is correct
62 Correct 63 ms 5484 KB Output is correct
63 Correct 60 ms 5524 KB Output is correct
64 Correct 60 ms 5612 KB Output is correct
65 Correct 65 ms 5484 KB Output is correct
66 Correct 60 ms 5484 KB Output is correct
67 Correct 59 ms 5484 KB Output is correct
68 Correct 62 ms 5484 KB Output is correct
69 Correct 2 ms 376 KB Output is correct
70 Correct 2 ms 376 KB Output is correct
71 Correct 61 ms 5484 KB Output is correct
72 Correct 60 ms 5456 KB Output is correct
73 Correct 59 ms 5404 KB Output is correct
74 Correct 2 ms 256 KB Output is correct
75 Correct 2 ms 256 KB Output is correct
76 Correct 2 ms 376 KB Output is correct
77 Correct 2 ms 256 KB Output is correct
78 Correct 276 ms 140136 KB Output is correct
79 Correct 108 ms 16840 KB Output is correct
80 Correct 276 ms 140140 KB Output is correct
81 Correct 66 ms 5868 KB Output is correct
82 Correct 277 ms 140012 KB Output is correct
83 Correct 194 ms 72628 KB Output is correct
84 Correct 13 ms 380 KB Output is correct
85 Correct 2 ms 376 KB Output is correct
86 Correct 11 ms 504 KB Output is correct
87 Correct 3 ms 632 KB Output is correct
88 Correct 5 ms 1784 KB Output is correct
89 Correct 2 ms 1784 KB Output is correct
90 Correct 5 ms 1528 KB Output is correct
91 Correct 4 ms 1400 KB Output is correct
92 Correct 4 ms 1272 KB Output is correct
93 Correct 4 ms 1144 KB Output is correct
94 Correct 4 ms 888 KB Output is correct
95 Correct 3 ms 760 KB Output is correct
96 Correct 3 ms 632 KB Output is correct
97 Correct 3 ms 376 KB Output is correct
98 Correct 3 ms 376 KB Output is correct
99 Correct 4 ms 1656 KB Output is correct
100 Correct 4 ms 1784 KB Output is correct
101 Correct 25 ms 12920 KB Output is correct
102 Correct 13 ms 3420 KB Output is correct
103 Correct 291 ms 140032 KB Output is correct
104 Correct 273 ms 140136 KB Output is correct
105 Correct 216 ms 81772 KB Output is correct
106 Correct 280 ms 140084 KB Output is correct
107 Correct 120 ms 20080 KB Output is correct
108 Correct 136 ms 35044 KB Output is correct
109 Correct 63 ms 5872 KB Output is correct
110 Correct 61 ms 5528 KB Output is correct
111 Correct 256 ms 125160 KB Output is correct
112 Correct 256 ms 110184 KB Output is correct
113 Correct 123 ms 21868 KB Output is correct
114 Correct 277 ms 140088 KB Output is correct
115 Correct 275 ms 140196 KB Output is correct