Submission #964456

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
964456	2024-04-16T23:45:15 Z	beaboss	Arranging Shoes (IOI19_shoes)	C++17	50 / 100	213 ms	280444 KB

shoes

// Source: https://oj.uz/problem/view/IOI19_shoes
// 

#include "bits/stdc++.h"

using namespace std;

#define s second
#define f first
#define pb push_back

typedef long long ll;

typedef pair<int, int> pii;
typedef vector<pii> vpii;

typedef vector<int> vi;

#define FOR(i, a, b) for (int i = (a); i<b; i++)

bool ckmin(int& a, int b){ return b < a ? a = b, true : false; }

bool ckmax(int& a, int b){ return b > a ? a = b, true : false; }

const int N = 1e5 + 10;

struct BIT {
private:
	int sz;
	vi bit;

public:
	BIT(int n) : sz(n), bit(n + 1) {}

	void add(int pos, int val) {
		pos++;
		for (; pos <= sz; pos += (pos & -pos)) {
			bit[pos] += val;
		}
	}

	int pref(int ind) {
		ind++;
		int res = 0;
		for (; ind > 0; ind -= (ind & -ind)) res += bit[ind];
		return res; 
	}
};

queue<int> l[N], r[N];

BIT bit(N);

ll count_swaps(vi s) {
	int n = s.size();
	FOR(i, 0, n) {
		if (s[i] < 0) l[-s[i]].push(i);
		else r[s[i]].push(i);
		bit.add(i, 1);
	}
	ll ans = 0;
	FOR(i, 0, n) {
		if (s[i] != 0) {
			int nxt;
			if (s[i] > 0) {
				nxt = l[s[i]].front();
				ans++;
			} else {
				nxt = r[-s[i]].front();
				s[i] = -s[i];
			}
			r[s[i]].pop();
			l[s[i]].pop();

			bit.add(i, -1);
			s[i] = 0;
			s[nxt] = 0;
			bit.add(nxt, -1);
			ans += bit.pref(nxt);


		}
	}

	return ans;

}

// int main() {
// 	ios::sync_with_stdio(false);
// 	cin.tie(nullptr);

// 	cout << count_swaps({2, 1, -1, -2}) << endl;
// }

Subtask #1

10.0 / 10.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	80 ms	135464 KB	Output is correct
2	Correct	63 ms	135460 KB	Output is correct

Subtask #2

20.0 / 20.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	80 ms	135464 KB	Output is correct
2	Correct	63 ms	135460 KB	Output is correct
3	Correct	87 ms	135372 KB	Output is correct
4	Correct	71 ms	135228 KB	Output is correct
5	Correct	74 ms	135252 KB	Output is correct
6	Correct	64 ms	135364 KB	Output is correct
7	Correct	70 ms	135308 KB	Output is correct
8	Correct	73 ms	135464 KB	Output is correct
9	Correct	63 ms	135448 KB	Output is correct
10	Correct	65 ms	135252 KB	Output is correct
11	Correct	75 ms	135472 KB	Output is correct
12	Correct	77 ms	135404 KB	Output is correct
13	Correct	78 ms	135252 KB	Output is correct
14	Correct	67 ms	135476 KB	Output is correct
15	Correct	66 ms	135248 KB	Output is correct
16	Correct	81 ms	135244 KB	Output is correct
17	Correct	67 ms	135464 KB	Output is correct
18	Correct	64 ms	135376 KB	Output is correct
19	Correct	67 ms	135252 KB	Output is correct
20	Correct	71 ms	135424 KB	Output is correct
21	Correct	67 ms	135304 KB	Output is correct
22	Correct	78 ms	135252 KB	Output is correct
23	Correct	65 ms	135348 KB	Output is correct
24	Correct	66 ms	135272 KB	Output is correct
25	Correct	71 ms	135248 KB	Output is correct
26	Correct	66 ms	135276 KB	Output is correct
27	Correct	65 ms	135248 KB	Output is correct
28	Correct	65 ms	135248 KB	Output is correct
29	Correct	64 ms	135368 KB	Output is correct
30	Correct	68 ms	135252 KB	Output is correct
31	Correct	67 ms	135708 KB	Output is correct
32	Correct	66 ms	135248 KB	Output is correct
33	Correct	64 ms	135252 KB	Output is correct
34	Correct	73 ms	135252 KB	Output is correct
35	Correct	71 ms	135252 KB	Output is correct
36	Correct	66 ms	135252 KB	Output is correct

Subtask #3

0 / 20.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	80 ms	135464 KB	Output is correct
2	Correct	63 ms	135460 KB	Output is correct
3	Correct	78 ms	135248 KB	Output is correct
4	Correct	72 ms	135316 KB	Output is correct
5	Correct	74 ms	135480 KB	Output is correct
6	Correct	70 ms	135260 KB	Output is correct
7	Correct	65 ms	135396 KB	Output is correct
8	Correct	75 ms	135380 KB	Output is correct
9	Correct	74 ms	135252 KB	Output is correct
10	Correct	77 ms	135400 KB	Output is correct
11	Correct	66 ms	135316 KB	Output is correct
12	Correct	64 ms	135248 KB	Output is correct
13	Correct	71 ms	135368 KB	Output is correct
14	Correct	66 ms	135492 KB	Output is correct
15	Correct	66 ms	135260 KB	Output is correct
16	Correct	79 ms	135316 KB	Output is correct
17	Correct	67 ms	135252 KB	Output is correct
18	Correct	79 ms	135276 KB	Output is correct
19	Correct	74 ms	135272 KB	Output is correct
20	Correct	74 ms	135568 KB	Output is correct
21	Correct	74 ms	135660 KB	Output is correct
22	Runtime error	213 ms	280444 KB	Execution killed with signal 11
23	Halted	0 ms	0 KB	-

Subtask #4

0 / 15.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	87 ms	135392 KB	Output is correct
2	Correct	101 ms	135448 KB	Output is correct
3	Correct	75 ms	135248 KB	Output is correct
4	Correct	74 ms	135436 KB	Output is correct
5	Runtime error	200 ms	278608 KB	Execution killed with signal 11
6	Halted	0 ms	0 KB	-

Subtask #5

20.0 / 20.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	80 ms	135464 KB	Output is correct
2	Correct	63 ms	135460 KB	Output is correct
3	Correct	87 ms	135372 KB	Output is correct
4	Correct	71 ms	135228 KB	Output is correct
5	Correct	74 ms	135252 KB	Output is correct
6	Correct	64 ms	135364 KB	Output is correct
7	Correct	70 ms	135308 KB	Output is correct
8	Correct	73 ms	135464 KB	Output is correct
9	Correct	63 ms	135448 KB	Output is correct
10	Correct	65 ms	135252 KB	Output is correct
11	Correct	75 ms	135472 KB	Output is correct
12	Correct	77 ms	135404 KB	Output is correct
13	Correct	78 ms	135252 KB	Output is correct
14	Correct	67 ms	135476 KB	Output is correct
15	Correct	66 ms	135248 KB	Output is correct
16	Correct	81 ms	135244 KB	Output is correct
17	Correct	67 ms	135464 KB	Output is correct
18	Correct	64 ms	135376 KB	Output is correct
19	Correct	67 ms	135252 KB	Output is correct
20	Correct	71 ms	135424 KB	Output is correct
21	Correct	67 ms	135304 KB	Output is correct
22	Correct	78 ms	135252 KB	Output is correct
23	Correct	65 ms	135348 KB	Output is correct
24	Correct	66 ms	135272 KB	Output is correct
25	Correct	71 ms	135248 KB	Output is correct
26	Correct	66 ms	135276 KB	Output is correct
27	Correct	65 ms	135248 KB	Output is correct
28	Correct	65 ms	135248 KB	Output is correct
29	Correct	64 ms	135368 KB	Output is correct
30	Correct	68 ms	135252 KB	Output is correct
31	Correct	67 ms	135708 KB	Output is correct
32	Correct	66 ms	135248 KB	Output is correct
33	Correct	64 ms	135252 KB	Output is correct
34	Correct	73 ms	135252 KB	Output is correct
35	Correct	71 ms	135252 KB	Output is correct
36	Correct	66 ms	135252 KB	Output is correct
37	Correct	70 ms	135268 KB	Output is correct
38	Correct	66 ms	135400 KB	Output is correct
39	Correct	66 ms	135252 KB	Output is correct
40	Correct	72 ms	135336 KB	Output is correct
41	Correct	80 ms	135500 KB	Output is correct
42	Correct	72 ms	135252 KB	Output is correct
43	Correct	71 ms	135268 KB	Output is correct
44	Correct	69 ms	135248 KB	Output is correct
45	Correct	67 ms	135252 KB	Output is correct
46	Correct	68 ms	135468 KB	Output is correct
47	Correct	72 ms	135408 KB	Output is correct
48	Correct	78 ms	135252 KB	Output is correct
49	Correct	67 ms	135248 KB	Output is correct
50	Correct	69 ms	135260 KB	Output is correct
51	Correct	72 ms	135460 KB	Output is correct
52	Correct	71 ms	135248 KB	Output is correct

Subtask #6

0 / 15.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	80 ms	135464 KB	Output is correct
2	Correct	63 ms	135460 KB	Output is correct
3	Correct	87 ms	135372 KB	Output is correct
4	Correct	71 ms	135228 KB	Output is correct
5	Correct	74 ms	135252 KB	Output is correct
6	Correct	64 ms	135364 KB	Output is correct
7	Correct	70 ms	135308 KB	Output is correct
8	Correct	73 ms	135464 KB	Output is correct
9	Correct	63 ms	135448 KB	Output is correct
10	Correct	65 ms	135252 KB	Output is correct
11	Correct	75 ms	135472 KB	Output is correct
12	Correct	77 ms	135404 KB	Output is correct
13	Correct	78 ms	135252 KB	Output is correct
14	Correct	67 ms	135476 KB	Output is correct
15	Correct	66 ms	135248 KB	Output is correct
16	Correct	81 ms	135244 KB	Output is correct
17	Correct	67 ms	135464 KB	Output is correct
18	Correct	64 ms	135376 KB	Output is correct
19	Correct	67 ms	135252 KB	Output is correct
20	Correct	71 ms	135424 KB	Output is correct
21	Correct	67 ms	135304 KB	Output is correct
22	Correct	78 ms	135252 KB	Output is correct
23	Correct	65 ms	135348 KB	Output is correct
24	Correct	66 ms	135272 KB	Output is correct
25	Correct	71 ms	135248 KB	Output is correct
26	Correct	66 ms	135276 KB	Output is correct
27	Correct	65 ms	135248 KB	Output is correct
28	Correct	65 ms	135248 KB	Output is correct
29	Correct	64 ms	135368 KB	Output is correct
30	Correct	68 ms	135252 KB	Output is correct
31	Correct	67 ms	135708 KB	Output is correct
32	Correct	66 ms	135248 KB	Output is correct
33	Correct	64 ms	135252 KB	Output is correct
34	Correct	73 ms	135252 KB	Output is correct
35	Correct	71 ms	135252 KB	Output is correct
36	Correct	66 ms	135252 KB	Output is correct
37	Correct	78 ms	135248 KB	Output is correct
38	Correct	72 ms	135316 KB	Output is correct
39	Correct	74 ms	135480 KB	Output is correct
40	Correct	70 ms	135260 KB	Output is correct
41	Correct	65 ms	135396 KB	Output is correct
42	Correct	75 ms	135380 KB	Output is correct
43	Correct	74 ms	135252 KB	Output is correct
44	Correct	77 ms	135400 KB	Output is correct
45	Correct	66 ms	135316 KB	Output is correct
46	Correct	64 ms	135248 KB	Output is correct
47	Correct	71 ms	135368 KB	Output is correct
48	Correct	66 ms	135492 KB	Output is correct
49	Correct	66 ms	135260 KB	Output is correct
50	Correct	79 ms	135316 KB	Output is correct
51	Correct	67 ms	135252 KB	Output is correct
52	Correct	79 ms	135276 KB	Output is correct
53	Correct	74 ms	135272 KB	Output is correct
54	Correct	74 ms	135568 KB	Output is correct
55	Correct	74 ms	135660 KB	Output is correct
56	Runtime error	213 ms	280444 KB	Execution killed with signal 11
57	Halted	0 ms	0 KB	-