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Submission #950838

# Submission time Handle Problem Language Result Execution time Memory
950838 2024-03-20T19:13:07 Z efishel Arranging Shoes (IOI19_shoes) C++17
100 / 100
 82 ms 76112 KB 
#include "shoes.h"
#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using vll = vector <ll>;

struct Fenwick { // 0-indexed
    vll tree;
    ll n;

    Fenwick (ll n): tree(n, 0), n(n) {}

    ll query (ll ql, ll qr) { return query(qr) - query(ql-1); }
    ll query (ll at) { // 0-indexed
        ll ans = 0;
        for (; at >= 0; at &= at+1, at--) ans += tree[at];
        return ans;
    }

    void update (ll at, ll val) { // 0-indexed
        for (; at < n; at |= at+1) tree[at] += val;
    }
};

ll count_swaps (vector <int> vei) {
    vll ve(vei.size());
    ll n = ve.size()/2;
    for (ll i = 0; i < 2*n; i++) ve[i] = vei[i];
    Fenwick ft(2*n); // ft[i] means that there are now ft[i] shoes in position i
    ll ans = 0;
    for (ll i = 0; i < 2*n; i++) {
        ft.update(i, 1);
    }
    vll next(2*n, -15);
    {vector <queue <ll> > nextqs(n+1);
    for (ll i = 2*n-1; i >= 0; i--) {
        queue <ll> &q = nextqs[abs(ve[i])];
        if (!q.size() || ve[q.front()] == ve[i]) { // not complement
            q.push(i);
        } else { // complements
            next[i] = q.front();
            q.pop();
        }
    }}
    for (ll i = 0; i < 2*n; i++) {
        ll j = next[i];
        if (j < 0) continue;
        ans += ft.query(i+1, j-1) + (ve[i] > 0); // extra flip
        ft.update(j, -1); // makes it 0
        ft.update(i, 1); // irrelevant but, still, two shoes are now here
    }
    return ans;
}

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct

Subtask #2
20.0 / 20.0

# 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 1 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 1 ms 360 KB Output is correct
6 Correct 1 ms 344 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 344 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 0 ms 344 KB Output is correct
16 Correct 0 ms 600 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 1 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 1 ms 348 KB Output is correct
22 Correct 0 ms 348 KB Output is correct
23 Correct 0 ms 348 KB Output is correct
24 Correct 1 ms 604 KB Output is correct
25 Correct 0 ms 348 KB Output is correct
26 Correct 0 ms 348 KB Output is correct
27 Correct 0 ms 348 KB Output is correct
28 Correct 0 ms 436 KB Output is correct
29 Correct 0 ms 348 KB Output is correct
30 Correct 0 ms 348 KB Output is correct
31 Correct 1 ms 348 KB Output is correct
32 Correct 0 ms 348 KB Output is correct
33 Correct 0 ms 348 KB Output is correct
34 Correct 0 ms 348 KB Output is correct
35 Correct 0 ms 348 KB Output is correct
36 Correct 0 ms 348 KB Output is correct

Subtask #3
20.0 / 20.0

# 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 1 ms 800 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 1 ms 600 KB Output is correct
9 Correct 0 ms 436 KB Output is correct
10 Correct 0 ms 600 KB Output is correct
11 Correct 1 ms 344 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 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 344 KB Output is correct
17 Correct 1 ms 600 KB Output is correct
18 Correct 1 ms 1116 KB Output is correct
19 Correct 1 ms 1116 KB Output is correct
20 Correct 6 ms 7772 KB Output is correct
21 Correct 6 ms 7772 KB Output is correct
22 Correct 62 ms 75044 KB Output is correct
23 Correct 58 ms 75092 KB Output is correct
24 Correct 62 ms 75324 KB Output is correct
25 Correct 68 ms 75976 KB Output is correct
26 Correct 69 ms 75276 KB Output is correct
27 Correct 56 ms 75068 KB Output is correct
28 Correct 63 ms 75880 KB Output is correct
29 Correct 64 ms 75968 KB Output is correct
30 Correct 64 ms 75860 KB Output is correct
31 Correct 61 ms 75088 KB Output is correct
32 Correct 66 ms 75860 KB Output is correct
33 Correct 64 ms 75856 KB Output is correct
34 Correct 66 ms 75860 KB Output is correct
35 Correct 0 ms 348 KB Output is correct
36 Correct 0 ms 348 KB Output is correct
37 Correct 63 ms 75860 KB Output is correct
38 Correct 63 ms 75920 KB Output is correct
39 Correct 62 ms 75916 KB Output is correct

Subtask #4
15.0 / 15.0

# 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 1 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 82 ms 75348 KB Output is correct
6 Correct 64 ms 75268 KB Output is correct
7 Correct 73 ms 75160 KB Output is correct
8 Correct 62 ms 76112 KB Output is correct
9 Correct 69 ms 75264 KB Output is correct
10 Correct 73 ms 75252 KB Output is correct

Subtask #5
20.0 / 20.0

# 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 1 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 1 ms 360 KB Output is correct
6 Correct 1 ms 344 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 344 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 0 ms 344 KB Output is correct
16 Correct 0 ms 600 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 1 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 1 ms 348 KB Output is correct
22 Correct 0 ms 348 KB Output is correct
23 Correct 0 ms 348 KB Output is correct
24 Correct 1 ms 604 KB Output is correct
25 Correct 0 ms 348 KB Output is correct
26 Correct 0 ms 348 KB Output is correct
27 Correct 0 ms 348 KB Output is correct
28 Correct 0 ms 436 KB Output is correct
29 Correct 0 ms 348 KB Output is correct
30 Correct 0 ms 348 KB Output is correct
31 Correct 1 ms 348 KB Output is correct
32 Correct 0 ms 348 KB Output is correct
33 Correct 0 ms 348 KB Output is correct
34 Correct 0 ms 348 KB Output is correct
35 Correct 0 ms 348 KB Output is correct
36 Correct 0 ms 348 KB Output is correct
37 Correct 0 ms 348 KB Output is correct
38 Correct 0 ms 348 KB Output is correct
39 Correct 0 ms 348 KB Output is correct
40 Correct 1 ms 604 KB Output is correct
41 Correct 1 ms 1116 KB Output is correct
42 Correct 1 ms 1116 KB Output is correct
43 Correct 1 ms 1116 KB Output is correct
44 Correct 1 ms 1116 KB Output is correct
45 Correct 1 ms 1116 KB Output is correct
46 Correct 1 ms 1116 KB Output is correct
47 Correct 1 ms 960 KB Output is correct
48 Correct 1 ms 1112 KB Output is correct
49 Correct 1 ms 1116 KB Output is correct
50 Correct 1 ms 1116 KB Output is correct
51 Correct 1 ms 1116 KB Output is correct
52 Correct 1 ms 1116 KB Output is correct

Subtask #6
15.0 / 15.0

# 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 1 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 1 ms 360 KB Output is correct
6 Correct 1 ms 344 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 344 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 0 ms 344 KB Output is correct
16 Correct 0 ms 600 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 1 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 1 ms 348 KB Output is correct
22 Correct 0 ms 348 KB Output is correct
23 Correct 0 ms 348 KB Output is correct
24 Correct 1 ms 604 KB Output is correct
25 Correct 0 ms 348 KB Output is correct
26 Correct 0 ms 348 KB Output is correct
27 Correct 0 ms 348 KB Output is correct
28 Correct 0 ms 436 KB Output is correct
29 Correct 0 ms 348 KB Output is correct
30 Correct 0 ms 348 KB Output is correct
31 Correct 1 ms 348 KB Output is correct
32 Correct 0 ms 348 KB Output is correct
33 Correct 0 ms 348 KB Output is correct
34 Correct 0 ms 348 KB Output is correct
35 Correct 0 ms 348 KB Output is correct
36 Correct 0 ms 348 KB Output is correct
37 Correct 1 ms 800 KB Output is correct
38 Correct 0 ms 348 KB Output is correct
39 Correct 1 ms 348 KB Output is correct
40 Correct 0 ms 348 KB Output is correct
41 Correct 0 ms 348 KB Output is correct
42 Correct 1 ms 600 KB Output is correct
43 Correct 0 ms 436 KB Output is correct
44 Correct 0 ms 600 KB Output is correct
45 Correct 1 ms 344 KB Output is correct
46 Correct 0 ms 348 KB Output is correct
47 Correct 0 ms 344 KB Output is correct
48 Correct 0 ms 348 KB Output is correct
49 Correct 0 ms 348 KB Output is correct
50 Correct 0 ms 344 KB Output is correct
51 Correct 1 ms 600 KB Output is correct
52 Correct 1 ms 1116 KB Output is correct
53 Correct 1 ms 1116 KB Output is correct
54 Correct 6 ms 7772 KB Output is correct
55 Correct 6 ms 7772 KB Output is correct
56 Correct 62 ms 75044 KB Output is correct
57 Correct 58 ms 75092 KB Output is correct
58 Correct 62 ms 75324 KB Output is correct
59 Correct 68 ms 75976 KB Output is correct
60 Correct 69 ms 75276 KB Output is correct
61 Correct 56 ms 75068 KB Output is correct
62 Correct 63 ms 75880 KB Output is correct
63 Correct 64 ms 75968 KB Output is correct
64 Correct 64 ms 75860 KB Output is correct
65 Correct 61 ms 75088 KB Output is correct
66 Correct 66 ms 75860 KB Output is correct
67 Correct 64 ms 75856 KB Output is correct
68 Correct 66 ms 75860 KB Output is correct
69 Correct 0 ms 348 KB Output is correct
70 Correct 0 ms 348 KB Output is correct
71 Correct 63 ms 75860 KB Output is correct
72 Correct 63 ms 75920 KB Output is correct
73 Correct 62 ms 75916 KB Output is correct
74 Correct 0 ms 348 KB Output is correct
75 Correct 0 ms 348 KB Output is correct
76 Correct 1 ms 348 KB Output is correct
77 Correct 0 ms 348 KB Output is correct
78 Correct 82 ms 75348 KB Output is correct
79 Correct 64 ms 75268 KB Output is correct
80 Correct 73 ms 75160 KB Output is correct
81 Correct 62 ms 76112 KB Output is correct
82 Correct 69 ms 75264 KB Output is correct
83 Correct 73 ms 75252 KB Output is correct
84 Correct 0 ms 348 KB Output is correct
85 Correct 0 ms 348 KB Output is correct
86 Correct 0 ms 348 KB Output is correct
87 Correct 1 ms 604 KB Output is correct
88 Correct 1 ms 1116 KB Output is correct
89 Correct 1 ms 1116 KB Output is correct
90 Correct 1 ms 1116 KB Output is correct
91 Correct 1 ms 1116 KB Output is correct
92 Correct 1 ms 1116 KB Output is correct
93 Correct 1 ms 1116 KB Output is correct
94 Correct 1 ms 960 KB Output is correct
95 Correct 1 ms 1112 KB Output is correct
96 Correct 1 ms 1116 KB Output is correct
97 Correct 1 ms 1116 KB Output is correct
98 Correct 1 ms 1116 KB Output is correct
99 Correct 1 ms 1116 KB Output is correct
100 Correct 1 ms 1112 KB Output is correct
101 Correct 6 ms 7916 KB Output is correct
102 Correct 6 ms 7768 KB Output is correct
103 Correct 70 ms 75172 KB Output is correct
104 Correct 66 ms 75180 KB Output is correct
105 Correct 65 ms 75220 KB Output is correct
106 Correct 69 ms 75232 KB Output is correct
107 Correct 60 ms 75092 KB Output is correct
108 Correct 71 ms 75232 KB Output is correct
109 Correct 62 ms 75956 KB Output is correct
110 Correct 64 ms 76088 KB Output is correct
111 Correct 73 ms 75088 KB Output is correct
112 Correct 70 ms 75264 KB Output is correct
113 Correct 65 ms 75092 KB Output is correct
114 Correct 73 ms 75264 KB Output is correct
115 Correct 68 ms 75044 KB Output is correct