답안 #197816

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
197816	2020-01-23T11:37:51 Z	arnold518	Arranging Shoes (IOI19_shoes)	C++14	100 / 100	259 ms	15900 KB

shoes

#include "shoes.h"
#include <bits/stdc++.h>
using namespace std;

typedef long long ll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;

const int MAXN = 2e5;

int S[MAXN+10], N;
vector<int> pos[MAXN+10];
bool vis[MAXN+10];
ll ans;

int tree[MAXN+10];
void update(int i) { for(; i<=N*2; i+=(i&-i)) tree[i]++; }
int query(int i) { int ret=0; for(; i>0; i-=(i&-i)) ret+=tree[i]; return ret; }
int query(int l, int r) { return query(r)-query(l-1); }

ll count_swaps(vector<int> _S)
{
	int i, j;

	N=_S.size()/2;
	for(i=1; i<=2*N; i++) S[i]=_S[i-1];

	for(i=2*N; i>=1; i--) pos[S[i]+N].push_back(i);

	for(i=1; i<=2*N; i++)
	{
		if(vis[i]) continue;
		int j=pos[-S[i]+N].back();
		ans+=j-i-1-query(i, j);
		pos[S[i]+N].pop_back(); pos[-S[i]+N].pop_back();
		vis[i]=true; vis[j]=true;
		update(i); update(j);
		if(S[i]>0) ans++;
	}	
	return ans;
}

Compilation message

shoes.cpp: In function 'll count_swaps(std::vector<int>)':
shoes.cpp:23:9: warning: unused variable 'j' [-Wunused-variable]
  int i, j;
         ^

Subtask #1

10.0 / 10.0

#	결과	실행 시간	메모리	Grader output
1	Correct	6 ms	4988 KB	Output is correct
2	Correct	6 ms	4984 KB	Output is correct

Subtask #2

20.0 / 20.0

#	결과	실행 시간	메모리	Grader output
1	Correct	6 ms	4988 KB	Output is correct
2	Correct	6 ms	4984 KB	Output is correct
3	Correct	6 ms	4984 KB	Output is correct
4	Correct	6 ms	4984 KB	Output is correct
5	Correct	6 ms	4984 KB	Output is correct
6	Correct	6 ms	4984 KB	Output is correct
7	Correct	6 ms	4984 KB	Output is correct
8	Correct	6 ms	4984 KB	Output is correct
9	Correct	12 ms	4984 KB	Output is correct
10	Correct	7 ms	4984 KB	Output is correct
11	Correct	10 ms	5112 KB	Output is correct
12	Correct	6 ms	4984 KB	Output is correct
13	Correct	6 ms	4984 KB	Output is correct
14	Correct	6 ms	5060 KB	Output is correct
15	Correct	7 ms	4984 KB	Output is correct
16	Correct	6 ms	4984 KB	Output is correct
17	Correct	7 ms	4984 KB	Output is correct
18	Correct	7 ms	4984 KB	Output is correct
19	Correct	6 ms	4984 KB	Output is correct
20	Correct	6 ms	4984 KB	Output is correct
21	Correct	6 ms	4984 KB	Output is correct
22	Correct	6 ms	4988 KB	Output is correct
23	Correct	13 ms	5112 KB	Output is correct
24	Correct	7 ms	4984 KB	Output is correct
25	Correct	7 ms	4984 KB	Output is correct
26	Correct	7 ms	4984 KB	Output is correct
27	Correct	8 ms	4988 KB	Output is correct
28	Correct	7 ms	5112 KB	Output is correct
29	Correct	6 ms	4984 KB	Output is correct
30	Correct	7 ms	4984 KB	Output is correct
31	Correct	7 ms	4984 KB	Output is correct
32	Correct	6 ms	4984 KB	Output is correct
33	Correct	6 ms	4984 KB	Output is correct
34	Correct	6 ms	4984 KB	Output is correct
35	Correct	6 ms	4984 KB	Output is correct
36	Correct	6 ms	4984 KB	Output is correct

Subtask #3

20.0 / 20.0

#	결과	실행 시간	메모리	Grader output
1	Correct	6 ms	4988 KB	Output is correct
2	Correct	6 ms	4984 KB	Output is correct
3	Correct	7 ms	5004 KB	Output is correct
4	Correct	6 ms	5032 KB	Output is correct
5	Correct	6 ms	4984 KB	Output is correct
6	Correct	6 ms	4960 KB	Output is correct
7	Correct	5 ms	4988 KB	Output is correct
8	Correct	4 ms	4984 KB	Output is correct
9	Correct	6 ms	4956 KB	Output is correct
10	Correct	6 ms	4984 KB	Output is correct
11	Correct	6 ms	4984 KB	Output is correct
12	Correct	3 ms	4984 KB	Output is correct
13	Correct	6 ms	4984 KB	Output is correct
14	Correct	6 ms	4988 KB	Output is correct
15	Correct	8 ms	4984 KB	Output is correct
16	Correct	8 ms	5112 KB	Output is correct
17	Correct	6 ms	5112 KB	Output is correct
18	Correct	8 ms	5112 KB	Output is correct
19	Correct	7 ms	5112 KB	Output is correct
20	Correct	10 ms	5496 KB	Output is correct
21	Correct	14 ms	5496 KB	Output is correct
22	Correct	45 ms	9340 KB	Output is correct
23	Correct	40 ms	9340 KB	Output is correct
24	Correct	45 ms	9236 KB	Output is correct
25	Correct	42 ms	9200 KB	Output is correct
26	Correct	46 ms	10564 KB	Output is correct
27	Correct	40 ms	10456 KB	Output is correct
28	Correct	44 ms	10568 KB	Output is correct
29	Correct	45 ms	10504 KB	Output is correct
30	Correct	43 ms	10480 KB	Output is correct
31	Correct	46 ms	10500 KB	Output is correct
32	Correct	43 ms	10604 KB	Output is correct
33	Correct	43 ms	10352 KB	Output is correct
34	Correct	43 ms	10476 KB	Output is correct
35	Correct	6 ms	4984 KB	Output is correct
36	Correct	6 ms	4984 KB	Output is correct
37	Correct	44 ms	10524 KB	Output is correct
38	Correct	44 ms	10604 KB	Output is correct
39	Correct	44 ms	10604 KB	Output is correct

Subtask #4

15.0 / 15.0

#	결과	실행 시간	메모리	Grader output
1	Correct	5 ms	4972 KB	Output is correct
2	Correct	7 ms	4984 KB	Output is correct
3	Correct	4 ms	4984 KB	Output is correct
4	Correct	7 ms	4984 KB	Output is correct
5	Correct	106 ms	14656 KB	Output is correct
6	Correct	67 ms	10980 KB	Output is correct
7	Correct	96 ms	15864 KB	Output is correct
8	Correct	49 ms	10548 KB	Output is correct
9	Correct	259 ms	15868 KB	Output is correct
10	Correct	89 ms	12792 KB	Output is correct

Subtask #5

20.0 / 20.0

#	결과	실행 시간	메모리	Grader output
1	Correct	6 ms	4988 KB	Output is correct
2	Correct	6 ms	4984 KB	Output is correct
3	Correct	6 ms	4984 KB	Output is correct
4	Correct	6 ms	4984 KB	Output is correct
5	Correct	6 ms	4984 KB	Output is correct
6	Correct	6 ms	4984 KB	Output is correct
7	Correct	6 ms	4984 KB	Output is correct
8	Correct	6 ms	4984 KB	Output is correct
9	Correct	12 ms	4984 KB	Output is correct
10	Correct	7 ms	4984 KB	Output is correct
11	Correct	10 ms	5112 KB	Output is correct
12	Correct	6 ms	4984 KB	Output is correct
13	Correct	6 ms	4984 KB	Output is correct
14	Correct	6 ms	5060 KB	Output is correct
15	Correct	7 ms	4984 KB	Output is correct
16	Correct	6 ms	4984 KB	Output is correct
17	Correct	7 ms	4984 KB	Output is correct
18	Correct	7 ms	4984 KB	Output is correct
19	Correct	6 ms	4984 KB	Output is correct
20	Correct	6 ms	4984 KB	Output is correct
21	Correct	6 ms	4984 KB	Output is correct
22	Correct	6 ms	4988 KB	Output is correct
23	Correct	13 ms	5112 KB	Output is correct
24	Correct	7 ms	4984 KB	Output is correct
25	Correct	7 ms	4984 KB	Output is correct
26	Correct	7 ms	4984 KB	Output is correct
27	Correct	8 ms	4988 KB	Output is correct
28	Correct	7 ms	5112 KB	Output is correct
29	Correct	6 ms	4984 KB	Output is correct
30	Correct	7 ms	4984 KB	Output is correct
31	Correct	7 ms	4984 KB	Output is correct
32	Correct	6 ms	4984 KB	Output is correct
33	Correct	6 ms	4984 KB	Output is correct
34	Correct	6 ms	4984 KB	Output is correct
35	Correct	6 ms	4984 KB	Output is correct
36	Correct	6 ms	4984 KB	Output is correct
37	Correct	6 ms	4984 KB	Output is correct
38	Correct	6 ms	4956 KB	Output is correct
39	Correct	6 ms	4984 KB	Output is correct
40	Correct	6 ms	4984 KB	Output is correct
41	Correct	7 ms	5112 KB	Output is correct
42	Correct	7 ms	5112 KB	Output is correct
43	Correct	6 ms	5108 KB	Output is correct
44	Correct	8 ms	5116 KB	Output is correct
45	Correct	6 ms	5240 KB	Output is correct
46	Correct	7 ms	5112 KB	Output is correct
47	Correct	7 ms	5112 KB	Output is correct
48	Correct	7 ms	5088 KB	Output is correct
49	Correct	6 ms	5112 KB	Output is correct
50	Correct	6 ms	4984 KB	Output is correct
51	Correct	6 ms	4984 KB	Output is correct
52	Correct	7 ms	5112 KB	Output is correct

Subtask #6

15.0 / 15.0

#	결과	실행 시간	메모리	Grader output
1	Correct	6 ms	4988 KB	Output is correct
2	Correct	6 ms	4984 KB	Output is correct
3	Correct	6 ms	4984 KB	Output is correct
4	Correct	6 ms	4984 KB	Output is correct
5	Correct	6 ms	4984 KB	Output is correct
6	Correct	6 ms	4984 KB	Output is correct
7	Correct	6 ms	4984 KB	Output is correct
8	Correct	6 ms	4984 KB	Output is correct
9	Correct	12 ms	4984 KB	Output is correct
10	Correct	7 ms	4984 KB	Output is correct
11	Correct	10 ms	5112 KB	Output is correct
12	Correct	6 ms	4984 KB	Output is correct
13	Correct	6 ms	4984 KB	Output is correct
14	Correct	6 ms	5060 KB	Output is correct
15	Correct	7 ms	4984 KB	Output is correct
16	Correct	6 ms	4984 KB	Output is correct
17	Correct	7 ms	4984 KB	Output is correct
18	Correct	7 ms	4984 KB	Output is correct
19	Correct	6 ms	4984 KB	Output is correct
20	Correct	6 ms	4984 KB	Output is correct
21	Correct	6 ms	4984 KB	Output is correct
22	Correct	6 ms	4988 KB	Output is correct
23	Correct	13 ms	5112 KB	Output is correct
24	Correct	7 ms	4984 KB	Output is correct
25	Correct	7 ms	4984 KB	Output is correct
26	Correct	7 ms	4984 KB	Output is correct
27	Correct	8 ms	4988 KB	Output is correct
28	Correct	7 ms	5112 KB	Output is correct
29	Correct	6 ms	4984 KB	Output is correct
30	Correct	7 ms	4984 KB	Output is correct
31	Correct	7 ms	4984 KB	Output is correct
32	Correct	6 ms	4984 KB	Output is correct
33	Correct	6 ms	4984 KB	Output is correct
34	Correct	6 ms	4984 KB	Output is correct
35	Correct	6 ms	4984 KB	Output is correct
36	Correct	6 ms	4984 KB	Output is correct
37	Correct	7 ms	5004 KB	Output is correct
38	Correct	6 ms	5032 KB	Output is correct
39	Correct	6 ms	4984 KB	Output is correct
40	Correct	6 ms	4960 KB	Output is correct
41	Correct	5 ms	4988 KB	Output is correct
42	Correct	4 ms	4984 KB	Output is correct
43	Correct	6 ms	4956 KB	Output is correct
44	Correct	6 ms	4984 KB	Output is correct
45	Correct	6 ms	4984 KB	Output is correct
46	Correct	3 ms	4984 KB	Output is correct
47	Correct	6 ms	4984 KB	Output is correct
48	Correct	6 ms	4988 KB	Output is correct
49	Correct	8 ms	4984 KB	Output is correct
50	Correct	8 ms	5112 KB	Output is correct
51	Correct	6 ms	5112 KB	Output is correct
52	Correct	8 ms	5112 KB	Output is correct
53	Correct	7 ms	5112 KB	Output is correct
54	Correct	10 ms	5496 KB	Output is correct
55	Correct	14 ms	5496 KB	Output is correct
56	Correct	45 ms	9340 KB	Output is correct
57	Correct	40 ms	9340 KB	Output is correct
58	Correct	45 ms	9236 KB	Output is correct
59	Correct	42 ms	9200 KB	Output is correct
60	Correct	46 ms	10564 KB	Output is correct
61	Correct	40 ms	10456 KB	Output is correct
62	Correct	44 ms	10568 KB	Output is correct
63	Correct	45 ms	10504 KB	Output is correct
64	Correct	43 ms	10480 KB	Output is correct
65	Correct	46 ms	10500 KB	Output is correct
66	Correct	43 ms	10604 KB	Output is correct
67	Correct	43 ms	10352 KB	Output is correct
68	Correct	43 ms	10476 KB	Output is correct
69	Correct	6 ms	4984 KB	Output is correct
70	Correct	6 ms	4984 KB	Output is correct
71	Correct	44 ms	10524 KB	Output is correct
72	Correct	44 ms	10604 KB	Output is correct
73	Correct	44 ms	10604 KB	Output is correct
74	Correct	5 ms	4972 KB	Output is correct
75	Correct	7 ms	4984 KB	Output is correct
76	Correct	4 ms	4984 KB	Output is correct
77	Correct	7 ms	4984 KB	Output is correct
78	Correct	106 ms	14656 KB	Output is correct
79	Correct	67 ms	10980 KB	Output is correct
80	Correct	96 ms	15864 KB	Output is correct
81	Correct	49 ms	10548 KB	Output is correct
82	Correct	259 ms	15868 KB	Output is correct
83	Correct	89 ms	12792 KB	Output is correct
84	Correct	6 ms	4984 KB	Output is correct
85	Correct	6 ms	4956 KB	Output is correct
86	Correct	6 ms	4984 KB	Output is correct
87	Correct	6 ms	4984 KB	Output is correct
88	Correct	7 ms	5112 KB	Output is correct
89	Correct	7 ms	5112 KB	Output is correct
90	Correct	6 ms	5108 KB	Output is correct
91	Correct	8 ms	5116 KB	Output is correct
92	Correct	6 ms	5240 KB	Output is correct
93	Correct	7 ms	5112 KB	Output is correct
94	Correct	7 ms	5112 KB	Output is correct
95	Correct	7 ms	5088 KB	Output is correct
96	Correct	6 ms	5112 KB	Output is correct
97	Correct	6 ms	4984 KB	Output is correct
98	Correct	6 ms	4984 KB	Output is correct
99	Correct	7 ms	5112 KB	Output is correct
100	Correct	7 ms	5112 KB	Output is correct
101	Correct	13 ms	6008 KB	Output is correct
102	Correct	12 ms	5752 KB	Output is correct
103	Correct	125 ms	15900 KB	Output is correct
104	Correct	93 ms	15836 KB	Output is correct
105	Correct	108 ms	13112 KB	Output is correct
106	Correct	95 ms	15864 KB	Output is correct
107	Correct	64 ms	11236 KB	Output is correct
108	Correct	80 ms	11484 KB	Output is correct
109	Correct	45 ms	10548 KB	Output is correct
110	Correct	45 ms	10592 KB	Output is correct
111	Correct	99 ms	15160 KB	Output is correct
112	Correct	113 ms	14504 KB	Output is correct
113	Correct	71 ms	11228 KB	Output is correct
114	Correct	95 ms	15864 KB	Output is correct
115	Correct	97 ms	15844 KB	Output is correct