Submission #964457

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
964457	2024-04-16T23:46:05 Z	beaboss	Arranging Shoes (IOI19_shoes)	C++17	100 / 100	222 ms	274196 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 = 2e5 + 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	145 ms	270336 KB	Output is correct
2	Correct	124 ms	270372 KB	Output is correct

Subtask #2

20.0 / 20.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	145 ms	270336 KB	Output is correct
2	Correct	124 ms	270372 KB	Output is correct
3	Correct	128 ms	270416 KB	Output is correct
4	Correct	126 ms	270416 KB	Output is correct
5	Correct	132 ms	270396 KB	Output is correct
6	Correct	132 ms	270400 KB	Output is correct
7	Correct	129 ms	270460 KB	Output is correct
8	Correct	133 ms	270484 KB	Output is correct
9	Correct	146 ms	270424 KB	Output is correct
10	Correct	122 ms	270416 KB	Output is correct
11	Correct	125 ms	270504 KB	Output is correct
12	Correct	150 ms	270400 KB	Output is correct
13	Correct	123 ms	270276 KB	Output is correct
14	Correct	139 ms	270416 KB	Output is correct
15	Correct	130 ms	270420 KB	Output is correct
16	Correct	133 ms	270464 KB	Output is correct
17	Correct	126 ms	270524 KB	Output is correct
18	Correct	127 ms	270420 KB	Output is correct
19	Correct	130 ms	270508 KB	Output is correct
20	Correct	127 ms	270288 KB	Output is correct
21	Correct	134 ms	270572 KB	Output is correct
22	Correct	125 ms	270412 KB	Output is correct
23	Correct	142 ms	270416 KB	Output is correct
24	Correct	138 ms	270416 KB	Output is correct
25	Correct	122 ms	270416 KB	Output is correct
26	Correct	130 ms	270448 KB	Output is correct
27	Correct	124 ms	270416 KB	Output is correct
28	Correct	127 ms	270468 KB	Output is correct
29	Correct	123 ms	270312 KB	Output is correct
30	Correct	134 ms	270468 KB	Output is correct
31	Correct	123 ms	270324 KB	Output is correct
32	Correct	136 ms	270424 KB	Output is correct
33	Correct	123 ms	270280 KB	Output is correct
34	Correct	136 ms	270340 KB	Output is correct
35	Correct	133 ms	270416 KB	Output is correct
36	Correct	123 ms	270416 KB	Output is correct

Subtask #3

20.0 / 20.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	145 ms	270336 KB	Output is correct
2	Correct	124 ms	270372 KB	Output is correct
3	Correct	127 ms	270492 KB	Output is correct
4	Correct	124 ms	270336 KB	Output is correct
5	Correct	126 ms	270312 KB	Output is correct
6	Correct	126 ms	270444 KB	Output is correct
7	Correct	134 ms	270760 KB	Output is correct
8	Correct	139 ms	270356 KB	Output is correct
9	Correct	143 ms	270352 KB	Output is correct
10	Correct	130 ms	270416 KB	Output is correct
11	Correct	130 ms	270504 KB	Output is correct
12	Correct	122 ms	270416 KB	Output is correct
13	Correct	126 ms	270260 KB	Output is correct
14	Correct	134 ms	270624 KB	Output is correct
15	Correct	126 ms	270420 KB	Output is correct
16	Correct	138 ms	270384 KB	Output is correct
17	Correct	124 ms	270420 KB	Output is correct
18	Correct	140 ms	270444 KB	Output is correct
19	Correct	151 ms	270428 KB	Output is correct
20	Correct	140 ms	270796 KB	Output is correct
21	Correct	139 ms	270820 KB	Output is correct
22	Correct	164 ms	272652 KB	Output is correct
23	Correct	153 ms	273960 KB	Output is correct
24	Correct	162 ms	274116 KB	Output is correct
25	Correct	166 ms	273952 KB	Output is correct
26	Correct	166 ms	274168 KB	Output is correct
27	Correct	169 ms	273852 KB	Output is correct
28	Correct	170 ms	273932 KB	Output is correct
29	Correct	159 ms	274000 KB	Output is correct
30	Correct	160 ms	274100 KB	Output is correct
31	Correct	180 ms	274004 KB	Output is correct
32	Correct	161 ms	273960 KB	Output is correct
33	Correct	179 ms	273936 KB	Output is correct
34	Correct	155 ms	273984 KB	Output is correct
35	Correct	133 ms	270420 KB	Output is correct
36	Correct	131 ms	270296 KB	Output is correct
37	Correct	161 ms	273976 KB	Output is correct
38	Correct	174 ms	273908 KB	Output is correct
39	Correct	155 ms	274196 KB	Output is correct

Subtask #4

15.0 / 15.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	128 ms	270340 KB	Output is correct
2	Correct	124 ms	270500 KB	Output is correct
3	Correct	124 ms	270464 KB	Output is correct
4	Correct	141 ms	270392 KB	Output is correct
5	Correct	195 ms	271956 KB	Output is correct
6	Correct	165 ms	273104 KB	Output is correct
7	Correct	212 ms	273316 KB	Output is correct
8	Correct	164 ms	274084 KB	Output is correct
9	Correct	216 ms	273076 KB	Output is correct
10	Correct	180 ms	273140 KB	Output is correct

Subtask #5

20.0 / 20.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	145 ms	270336 KB	Output is correct
2	Correct	124 ms	270372 KB	Output is correct
3	Correct	128 ms	270416 KB	Output is correct
4	Correct	126 ms	270416 KB	Output is correct
5	Correct	132 ms	270396 KB	Output is correct
6	Correct	132 ms	270400 KB	Output is correct
7	Correct	129 ms	270460 KB	Output is correct
8	Correct	133 ms	270484 KB	Output is correct
9	Correct	146 ms	270424 KB	Output is correct
10	Correct	122 ms	270416 KB	Output is correct
11	Correct	125 ms	270504 KB	Output is correct
12	Correct	150 ms	270400 KB	Output is correct
13	Correct	123 ms	270276 KB	Output is correct
14	Correct	139 ms	270416 KB	Output is correct
15	Correct	130 ms	270420 KB	Output is correct
16	Correct	133 ms	270464 KB	Output is correct
17	Correct	126 ms	270524 KB	Output is correct
18	Correct	127 ms	270420 KB	Output is correct
19	Correct	130 ms	270508 KB	Output is correct
20	Correct	127 ms	270288 KB	Output is correct
21	Correct	134 ms	270572 KB	Output is correct
22	Correct	125 ms	270412 KB	Output is correct
23	Correct	142 ms	270416 KB	Output is correct
24	Correct	138 ms	270416 KB	Output is correct
25	Correct	122 ms	270416 KB	Output is correct
26	Correct	130 ms	270448 KB	Output is correct
27	Correct	124 ms	270416 KB	Output is correct
28	Correct	127 ms	270468 KB	Output is correct
29	Correct	123 ms	270312 KB	Output is correct
30	Correct	134 ms	270468 KB	Output is correct
31	Correct	123 ms	270324 KB	Output is correct
32	Correct	136 ms	270424 KB	Output is correct
33	Correct	123 ms	270280 KB	Output is correct
34	Correct	136 ms	270340 KB	Output is correct
35	Correct	133 ms	270416 KB	Output is correct
36	Correct	123 ms	270416 KB	Output is correct
37	Correct	133 ms	270420 KB	Output is correct
38	Correct	132 ms	270416 KB	Output is correct
39	Correct	125 ms	270364 KB	Output is correct
40	Correct	126 ms	270416 KB	Output is correct
41	Correct	123 ms	270264 KB	Output is correct
42	Correct	137 ms	270420 KB	Output is correct
43	Correct	125 ms	270280 KB	Output is correct
44	Correct	132 ms	270416 KB	Output is correct
45	Correct	142 ms	270524 KB	Output is correct
46	Correct	126 ms	270380 KB	Output is correct
47	Correct	126 ms	270500 KB	Output is correct
48	Correct	129 ms	270376 KB	Output is correct
49	Correct	134 ms	270408 KB	Output is correct
50	Correct	158 ms	270416 KB	Output is correct
51	Correct	147 ms	270500 KB	Output is correct
52	Correct	141 ms	270328 KB	Output is correct

Subtask #6

15.0 / 15.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	145 ms	270336 KB	Output is correct
2	Correct	124 ms	270372 KB	Output is correct
3	Correct	128 ms	270416 KB	Output is correct
4	Correct	126 ms	270416 KB	Output is correct
5	Correct	132 ms	270396 KB	Output is correct
6	Correct	132 ms	270400 KB	Output is correct
7	Correct	129 ms	270460 KB	Output is correct
8	Correct	133 ms	270484 KB	Output is correct
9	Correct	146 ms	270424 KB	Output is correct
10	Correct	122 ms	270416 KB	Output is correct
11	Correct	125 ms	270504 KB	Output is correct
12	Correct	150 ms	270400 KB	Output is correct
13	Correct	123 ms	270276 KB	Output is correct
14	Correct	139 ms	270416 KB	Output is correct
15	Correct	130 ms	270420 KB	Output is correct
16	Correct	133 ms	270464 KB	Output is correct
17	Correct	126 ms	270524 KB	Output is correct
18	Correct	127 ms	270420 KB	Output is correct
19	Correct	130 ms	270508 KB	Output is correct
20	Correct	127 ms	270288 KB	Output is correct
21	Correct	134 ms	270572 KB	Output is correct
22	Correct	125 ms	270412 KB	Output is correct
23	Correct	142 ms	270416 KB	Output is correct
24	Correct	138 ms	270416 KB	Output is correct
25	Correct	122 ms	270416 KB	Output is correct
26	Correct	130 ms	270448 KB	Output is correct
27	Correct	124 ms	270416 KB	Output is correct
28	Correct	127 ms	270468 KB	Output is correct
29	Correct	123 ms	270312 KB	Output is correct
30	Correct	134 ms	270468 KB	Output is correct
31	Correct	123 ms	270324 KB	Output is correct
32	Correct	136 ms	270424 KB	Output is correct
33	Correct	123 ms	270280 KB	Output is correct
34	Correct	136 ms	270340 KB	Output is correct
35	Correct	133 ms	270416 KB	Output is correct
36	Correct	123 ms	270416 KB	Output is correct
37	Correct	127 ms	270492 KB	Output is correct
38	Correct	124 ms	270336 KB	Output is correct
39	Correct	126 ms	270312 KB	Output is correct
40	Correct	126 ms	270444 KB	Output is correct
41	Correct	134 ms	270760 KB	Output is correct
42	Correct	139 ms	270356 KB	Output is correct
43	Correct	143 ms	270352 KB	Output is correct
44	Correct	130 ms	270416 KB	Output is correct
45	Correct	130 ms	270504 KB	Output is correct
46	Correct	122 ms	270416 KB	Output is correct
47	Correct	126 ms	270260 KB	Output is correct
48	Correct	134 ms	270624 KB	Output is correct
49	Correct	126 ms	270420 KB	Output is correct
50	Correct	138 ms	270384 KB	Output is correct
51	Correct	124 ms	270420 KB	Output is correct
52	Correct	140 ms	270444 KB	Output is correct
53	Correct	151 ms	270428 KB	Output is correct
54	Correct	140 ms	270796 KB	Output is correct
55	Correct	139 ms	270820 KB	Output is correct
56	Correct	164 ms	272652 KB	Output is correct
57	Correct	153 ms	273960 KB	Output is correct
58	Correct	162 ms	274116 KB	Output is correct
59	Correct	166 ms	273952 KB	Output is correct
60	Correct	166 ms	274168 KB	Output is correct
61	Correct	169 ms	273852 KB	Output is correct
62	Correct	170 ms	273932 KB	Output is correct
63	Correct	159 ms	274000 KB	Output is correct
64	Correct	160 ms	274100 KB	Output is correct
65	Correct	180 ms	274004 KB	Output is correct
66	Correct	161 ms	273960 KB	Output is correct
67	Correct	179 ms	273936 KB	Output is correct
68	Correct	155 ms	273984 KB	Output is correct
69	Correct	133 ms	270420 KB	Output is correct
70	Correct	131 ms	270296 KB	Output is correct
71	Correct	161 ms	273976 KB	Output is correct
72	Correct	174 ms	273908 KB	Output is correct
73	Correct	155 ms	274196 KB	Output is correct
74	Correct	128 ms	270340 KB	Output is correct
75	Correct	124 ms	270500 KB	Output is correct
76	Correct	124 ms	270464 KB	Output is correct
77	Correct	141 ms	270392 KB	Output is correct
78	Correct	195 ms	271956 KB	Output is correct
79	Correct	165 ms	273104 KB	Output is correct
80	Correct	212 ms	273316 KB	Output is correct
81	Correct	164 ms	274084 KB	Output is correct
82	Correct	216 ms	273076 KB	Output is correct
83	Correct	180 ms	273140 KB	Output is correct
84	Correct	133 ms	270420 KB	Output is correct
85	Correct	132 ms	270416 KB	Output is correct
86	Correct	125 ms	270364 KB	Output is correct
87	Correct	126 ms	270416 KB	Output is correct
88	Correct	123 ms	270264 KB	Output is correct
89	Correct	137 ms	270420 KB	Output is correct
90	Correct	125 ms	270280 KB	Output is correct
91	Correct	132 ms	270416 KB	Output is correct
92	Correct	142 ms	270524 KB	Output is correct
93	Correct	126 ms	270380 KB	Output is correct
94	Correct	126 ms	270500 KB	Output is correct
95	Correct	129 ms	270376 KB	Output is correct
96	Correct	134 ms	270408 KB	Output is correct
97	Correct	158 ms	270416 KB	Output is correct
98	Correct	147 ms	270500 KB	Output is correct
99	Correct	141 ms	270328 KB	Output is correct
100	Correct	141 ms	270504 KB	Output is correct
101	Correct	137 ms	270660 KB	Output is correct
102	Correct	127 ms	270672 KB	Output is correct
103	Correct	206 ms	273192 KB	Output is correct
104	Correct	222 ms	273148 KB	Output is correct
105	Correct	197 ms	273316 KB	Output is correct
106	Correct	198 ms	273268 KB	Output is correct
107	Correct	169 ms	273236 KB	Output is correct
108	Correct	174 ms	273240 KB	Output is correct
109	Correct	160 ms	274028 KB	Output is correct
110	Correct	168 ms	274084 KB	Output is correct
111	Correct	191 ms	273060 KB	Output is correct
112	Correct	207 ms	273296 KB	Output is correct
113	Correct	169 ms	273244 KB	Output is correct
114	Correct	204 ms	273060 KB	Output is correct
115	Correct	186 ms	273312 KB	Output is correct