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Submission #469578

# Submission time Handle Problem Language Result Execution time Memory
469578 2021-09-01T11:27:16 Z spike1236 Arranging Shoes (IOI19_shoes) C++14
100 / 100
 97 ms 13620 KB 
#include <bits/stdc++.h>
using namespace std;
#define pb push_back
#define mp make_pair
#define f first
#define s second
#define ll long long
#define ld long double
#define all(_v) _v.begin(), _v.end()
#define sz(_v) (int)_v.size()
#define pii pair <int, int>
#define pll pair <ll, ll>
#define veci vector <int>
#define vecll vector <ll>

const int dx[4] = {1, -1, 0, 0};
const int dy[4] = {0, 0, -1, 1};
const double PI = 3.1415926535897932384626433832795;
const double eps = 1e-9;
const int MOD1 = 1e9 + 7;
const int MOD2 = 998244353;

const int MAXN = 2e5 + 10;
int t[MAXN], n;
vector <pii> pos[MAXN];

void upd(int r, int val) {
    for(; r < MAXN; r += r & -r) t[r] += val;
}

int get(int r) {
    int res = 0;
    for(; r > 0; r -= r & -r) res += t[r];
    return res;
}

ll count_swaps(veci b) {
    n = sz(b) / 2;
    b.insert(b.begin(), 0);
    for(int i = 1; i <= 2 * n; ++i) {
        upd(i, 1);
        int x = b[i];
        pos[abs(x)].pb(mp(x, i));
    }
    ll ans = 0;
    vector <pii> seg;
    for(int i = 1; i <= n; ++i) {
        sort(all(pos[i]));
        for(int j = 0; j < sz(pos[i]) / 2; ++j) {
            int l = pos[i][j].s, r = pos[i][j + sz(pos[i]) / 2].s;
            if(l > r) ++ans, swap(l, r);
            seg.pb(mp(l, r));
        }
    }
    sort(all(seg));
    for(auto p : seg) {
        int l = p.f, r = p.s;
        ans += get(r - 1) - get(l);
        upd(l, -1);
        upd(r, -1);
    }
    return ans;
}

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4940 KB Output is correct
2 Correct 3 ms 4940 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4940 KB Output is correct
2 Correct 3 ms 4940 KB Output is correct
3 Correct 3 ms 4940 KB Output is correct
4 Correct 3 ms 4940 KB Output is correct
5 Correct 3 ms 4940 KB Output is correct
6 Correct 3 ms 4940 KB Output is correct
7 Correct 3 ms 4940 KB Output is correct
8 Correct 3 ms 4940 KB Output is correct
9 Correct 3 ms 4940 KB Output is correct
10 Correct 3 ms 4940 KB Output is correct
11 Correct 4 ms 4940 KB Output is correct
12 Correct 3 ms 4940 KB Output is correct
13 Correct 3 ms 4940 KB Output is correct
14 Correct 5 ms 4940 KB Output is correct
15 Correct 3 ms 5000 KB Output is correct
16 Correct 3 ms 4940 KB Output is correct
17 Correct 3 ms 4940 KB Output is correct
18 Correct 3 ms 4988 KB Output is correct
19 Correct 3 ms 4940 KB Output is correct
20 Correct 4 ms 4992 KB Output is correct
21 Correct 3 ms 4940 KB Output is correct
22 Correct 3 ms 5000 KB Output is correct
23 Correct 3 ms 4940 KB Output is correct
24 Correct 3 ms 4940 KB Output is correct
25 Correct 4 ms 5016 KB Output is correct
26 Correct 3 ms 5028 KB Output is correct
27 Correct 3 ms 4940 KB Output is correct
28 Correct 3 ms 4940 KB Output is correct
29 Correct 4 ms 4940 KB Output is correct
30 Correct 3 ms 4992 KB Output is correct
31 Correct 3 ms 4940 KB Output is correct
32 Correct 3 ms 4992 KB Output is correct
33 Correct 3 ms 4940 KB Output is correct
34 Correct 3 ms 4940 KB Output is correct
35 Correct 3 ms 4940 KB Output is correct
36 Correct 3 ms 4996 KB Output is correct

Subtask #3
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4940 KB Output is correct
2 Correct 3 ms 4940 KB Output is correct
3 Correct 4 ms 4940 KB Output is correct
4 Correct 4 ms 4940 KB Output is correct
5 Correct 3 ms 4940 KB Output is correct
6 Correct 4 ms 4940 KB Output is correct
7 Correct 3 ms 4940 KB Output is correct
8 Correct 3 ms 4940 KB Output is correct
9 Correct 4 ms 4992 KB Output is correct
10 Correct 3 ms 4940 KB Output is correct
11 Correct 3 ms 4992 KB Output is correct
12 Correct 3 ms 4940 KB Output is correct
13 Correct 4 ms 4940 KB Output is correct
14 Correct 3 ms 4940 KB Output is correct
15 Correct 3 ms 4940 KB Output is correct
16 Correct 3 ms 4940 KB Output is correct
17 Correct 3 ms 4940 KB Output is correct
18 Correct 6 ms 5068 KB Output is correct
19 Correct 4 ms 5008 KB Output is correct
20 Correct 9 ms 5648 KB Output is correct
21 Correct 10 ms 5696 KB Output is correct
22 Correct 75 ms 11892 KB Output is correct
23 Correct 52 ms 11952 KB Output is correct
24 Correct 63 ms 11868 KB Output is correct
25 Correct 46 ms 11784 KB Output is correct
26 Correct 74 ms 11952 KB Output is correct
27 Correct 54 ms 11696 KB Output is correct
28 Correct 49 ms 11868 KB Output is correct
29 Correct 50 ms 11884 KB Output is correct
30 Correct 47 ms 11896 KB Output is correct
31 Correct 62 ms 11988 KB Output is correct
32 Correct 52 ms 11888 KB Output is correct
33 Correct 50 ms 11704 KB Output is correct
34 Correct 65 ms 11892 KB Output is correct
35 Correct 4 ms 5068 KB Output is correct
36 Correct 5 ms 4940 KB Output is correct
37 Correct 53 ms 11892 KB Output is correct
38 Correct 50 ms 11904 KB Output is correct
39 Correct 58 ms 11884 KB Output is correct

Subtask #4
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 4940 KB Output is correct
2 Correct 3 ms 4940 KB Output is correct
3 Correct 4 ms 4940 KB Output is correct
4 Correct 3 ms 4940 KB Output is correct
5 Correct 70 ms 13432 KB Output is correct
6 Correct 61 ms 12908 KB Output is correct
7 Correct 70 ms 13412 KB Output is correct
8 Correct 52 ms 12276 KB Output is correct
9 Correct 97 ms 13432 KB Output is correct
10 Correct 71 ms 13308 KB Output is correct

Subtask #5
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4940 KB Output is correct
2 Correct 3 ms 4940 KB Output is correct
3 Correct 3 ms 4940 KB Output is correct
4 Correct 3 ms 4940 KB Output is correct
5 Correct 3 ms 4940 KB Output is correct
6 Correct 3 ms 4940 KB Output is correct
7 Correct 3 ms 4940 KB Output is correct
8 Correct 3 ms 4940 KB Output is correct
9 Correct 3 ms 4940 KB Output is correct
10 Correct 3 ms 4940 KB Output is correct
11 Correct 4 ms 4940 KB Output is correct
12 Correct 3 ms 4940 KB Output is correct
13 Correct 3 ms 4940 KB Output is correct
14 Correct 5 ms 4940 KB Output is correct
15 Correct 3 ms 5000 KB Output is correct
16 Correct 3 ms 4940 KB Output is correct
17 Correct 3 ms 4940 KB Output is correct
18 Correct 3 ms 4988 KB Output is correct
19 Correct 3 ms 4940 KB Output is correct
20 Correct 4 ms 4992 KB Output is correct
21 Correct 3 ms 4940 KB Output is correct
22 Correct 3 ms 5000 KB Output is correct
23 Correct 3 ms 4940 KB Output is correct
24 Correct 3 ms 4940 KB Output is correct
25 Correct 4 ms 5016 KB Output is correct
26 Correct 3 ms 5028 KB Output is correct
27 Correct 3 ms 4940 KB Output is correct
28 Correct 3 ms 4940 KB Output is correct
29 Correct 4 ms 4940 KB Output is correct
30 Correct 3 ms 4992 KB Output is correct
31 Correct 3 ms 4940 KB Output is correct
32 Correct 3 ms 4992 KB Output is correct
33 Correct 3 ms 4940 KB Output is correct
34 Correct 3 ms 4940 KB Output is correct
35 Correct 3 ms 4940 KB Output is correct
36 Correct 3 ms 4996 KB Output is correct
37 Correct 3 ms 4940 KB Output is correct
38 Correct 3 ms 4940 KB Output is correct
39 Correct 4 ms 4992 KB Output is correct
40 Correct 4 ms 4940 KB Output is correct
41 Correct 4 ms 5000 KB Output is correct
42 Correct 4 ms 5068 KB Output is correct
43 Correct 4 ms 5068 KB Output is correct
44 Correct 4 ms 5004 KB Output is correct
45 Correct 4 ms 5068 KB Output is correct
46 Correct 4 ms 5004 KB Output is correct
47 Correct 4 ms 5068 KB Output is correct
48 Correct 4 ms 5004 KB Output is correct
49 Correct 5 ms 5068 KB Output is correct
50 Correct 4 ms 5068 KB Output is correct
51 Correct 4 ms 5068 KB Output is correct
52 Correct 4 ms 5068 KB Output is correct

Subtask #6
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4940 KB Output is correct
2 Correct 3 ms 4940 KB Output is correct
3 Correct 3 ms 4940 KB Output is correct
4 Correct 3 ms 4940 KB Output is correct
5 Correct 3 ms 4940 KB Output is correct
6 Correct 3 ms 4940 KB Output is correct
7 Correct 3 ms 4940 KB Output is correct
8 Correct 3 ms 4940 KB Output is correct
9 Correct 3 ms 4940 KB Output is correct
10 Correct 3 ms 4940 KB Output is correct
11 Correct 4 ms 4940 KB Output is correct
12 Correct 3 ms 4940 KB Output is correct
13 Correct 3 ms 4940 KB Output is correct
14 Correct 5 ms 4940 KB Output is correct
15 Correct 3 ms 5000 KB Output is correct
16 Correct 3 ms 4940 KB Output is correct
17 Correct 3 ms 4940 KB Output is correct
18 Correct 3 ms 4988 KB Output is correct
19 Correct 3 ms 4940 KB Output is correct
20 Correct 4 ms 4992 KB Output is correct
21 Correct 3 ms 4940 KB Output is correct
22 Correct 3 ms 5000 KB Output is correct
23 Correct 3 ms 4940 KB Output is correct
24 Correct 3 ms 4940 KB Output is correct
25 Correct 4 ms 5016 KB Output is correct
26 Correct 3 ms 5028 KB Output is correct
27 Correct 3 ms 4940 KB Output is correct
28 Correct 3 ms 4940 KB Output is correct
29 Correct 4 ms 4940 KB Output is correct
30 Correct 3 ms 4992 KB Output is correct
31 Correct 3 ms 4940 KB Output is correct
32 Correct 3 ms 4992 KB Output is correct
33 Correct 3 ms 4940 KB Output is correct
34 Correct 3 ms 4940 KB Output is correct
35 Correct 3 ms 4940 KB Output is correct
36 Correct 3 ms 4996 KB Output is correct
37 Correct 4 ms 4940 KB Output is correct
38 Correct 4 ms 4940 KB Output is correct
39 Correct 3 ms 4940 KB Output is correct
40 Correct 4 ms 4940 KB Output is correct
41 Correct 3 ms 4940 KB Output is correct
42 Correct 3 ms 4940 KB Output is correct
43 Correct 4 ms 4992 KB Output is correct
44 Correct 3 ms 4940 KB Output is correct
45 Correct 3 ms 4992 KB Output is correct
46 Correct 3 ms 4940 KB Output is correct
47 Correct 4 ms 4940 KB Output is correct
48 Correct 3 ms 4940 KB Output is correct
49 Correct 3 ms 4940 KB Output is correct
50 Correct 3 ms 4940 KB Output is correct
51 Correct 3 ms 4940 KB Output is correct
52 Correct 6 ms 5068 KB Output is correct
53 Correct 4 ms 5008 KB Output is correct
54 Correct 9 ms 5648 KB Output is correct
55 Correct 10 ms 5696 KB Output is correct
56 Correct 75 ms 11892 KB Output is correct
57 Correct 52 ms 11952 KB Output is correct
58 Correct 63 ms 11868 KB Output is correct
59 Correct 46 ms 11784 KB Output is correct
60 Correct 74 ms 11952 KB Output is correct
61 Correct 54 ms 11696 KB Output is correct
62 Correct 49 ms 11868 KB Output is correct
63 Correct 50 ms 11884 KB Output is correct
64 Correct 47 ms 11896 KB Output is correct
65 Correct 62 ms 11988 KB Output is correct
66 Correct 52 ms 11888 KB Output is correct
67 Correct 50 ms 11704 KB Output is correct
68 Correct 65 ms 11892 KB Output is correct
69 Correct 4 ms 5068 KB Output is correct
70 Correct 5 ms 4940 KB Output is correct
71 Correct 53 ms 11892 KB Output is correct
72 Correct 50 ms 11904 KB Output is correct
73 Correct 58 ms 11884 KB Output is correct
74 Correct 4 ms 4940 KB Output is correct
75 Correct 3 ms 4940 KB Output is correct
76 Correct 4 ms 4940 KB Output is correct
77 Correct 3 ms 4940 KB Output is correct
78 Correct 70 ms 13432 KB Output is correct
79 Correct 61 ms 12908 KB Output is correct
80 Correct 70 ms 13412 KB Output is correct
81 Correct 52 ms 12276 KB Output is correct
82 Correct 97 ms 13432 KB Output is correct
83 Correct 71 ms 13308 KB Output is correct
84 Correct 3 ms 4940 KB Output is correct
85 Correct 3 ms 4940 KB Output is correct
86 Correct 4 ms 4992 KB Output is correct
87 Correct 4 ms 4940 KB Output is correct
88 Correct 4 ms 5000 KB Output is correct
89 Correct 4 ms 5068 KB Output is correct
90 Correct 4 ms 5068 KB Output is correct
91 Correct 4 ms 5004 KB Output is correct
92 Correct 4 ms 5068 KB Output is correct
93 Correct 4 ms 5004 KB Output is correct
94 Correct 4 ms 5068 KB Output is correct
95 Correct 4 ms 5004 KB Output is correct
96 Correct 5 ms 5068 KB Output is correct
97 Correct 4 ms 5068 KB Output is correct
98 Correct 4 ms 5068 KB Output is correct
99 Correct 4 ms 5068 KB Output is correct
100 Correct 5 ms 5004 KB Output is correct
101 Correct 9 ms 5868 KB Output is correct
102 Correct 11 ms 5772 KB Output is correct
103 Correct 88 ms 13512 KB Output is correct
104 Correct 88 ms 13428 KB Output is correct
105 Correct 75 ms 13040 KB Output is correct
106 Correct 75 ms 13508 KB Output is correct
107 Correct 64 ms 12840 KB Output is correct
108 Correct 65 ms 12852 KB Output is correct
109 Correct 56 ms 12144 KB Output is correct
110 Correct 49 ms 11968 KB Output is correct
111 Correct 81 ms 13620 KB Output is correct
112 Correct 85 ms 13564 KB Output is correct
113 Correct 63 ms 12932 KB Output is correct
114 Correct 73 ms 13524 KB Output is correct
115 Correct 70 ms 13424 KB Output is correct