#include <bits/stdc++.h>
#define ll long long
#define pll pair<ll, ll>
#define pii pair<int, int>
#define f first
#define se second
#define pb push_back
using namespace std;
const int N = 4e5 + 219;
const ll M = 3e5 + 19;
const ll inf = 1e15 + 10;
const ll mod = 1e9 + 7;
ll n, a[N], Last[N], Lastt[N], curL[N], curR[N], curL1[N], curR1[N], nx[N], prv[N], t[4 * N];
bool vis[N];
void upd(int v, int tl, int tr, int pos) {
if (tl == tr) {
t[v] = 1;
return;
}
int tm = (tl + tr) / 2;
if (pos <= tm)
upd(v * 2, tl, tm, pos);
else
upd(v * 2 + 1, tm + 1, tr, pos);
t[v] = t[v * 2] + t[v * 2 + 1];
}
ll get(int v, int tl, int tr, int l, int r) {
if (r < tl || tr < l)
return 0;
int tm = (tl + tr) / 2;
if (l <= tl && tr <= r)
return t[v];
return get(v * 2, tl, tm, l, r) + get(v * 2 + 1, tm + 1, tr, l, r);
}
ll count_swaps(vector <int> b) {
n = b.size();
for (int i = 0; i < b.size(); i++)
a[i + 1] = b[i];
for (int i = 1; i <= n; i++) {
if (a[i] < 0) {
prv[i] = Lastt[-a[i]];
curR1[-a[i]] = i;
Lastt[-a[i]] = i;
} else {
prv[i] = Last[a[i]];
curR[a[i]] = i;
Last[a[i]] = i;
}
}
memset(Last, 0, sizeof(Last));
memset(Lastt, 0, sizeof(Lastt));
for (int i = n; i >= 1; i--) {
if (a[i] < 0) {
nx[i] = Lastt[-a[i]];
curL1[-a[i]] = i;
Lastt[-a[i]] = i;
} else {
nx[i] = Last[a[i]];
curL[a[i]] = i;
Last[a[i]] = i;
}
}
ll ans = 0, t1, t2;
ll L = 1, R = n;
while (L <= R) {
int crl, crr;
if (a[L] < 0)
t1 = curL[-a[L]] - L - get(1, 1, n, L, curL[-a[L]]) - 1;
else
t1 = curL1[a[L]] - L - get(1, 1, n, L, curL1[a[L]]) - 1;
if (a[L] > 0)
t1++;
if (a[R] < 0)
t2 = R - curR[-a[R]] - get(1, 1, n, curR[-a[R]], R) - 1;
else
t2 = R - curR1[a[R]] - get(1, 1, n, curR1[a[R]], R) - 1;
if (a[R] < 0)
t2++;
if (t1 < t2) {
ans += t1;
if (a[L] < 0) {
vis[L] = vis[curL[-a[L]]] = 1;
upd(1, 1, n, L);
upd(1, 1, n, curL[-a[L]]);
curL1[-a[L]] = nx[curL1[-a[L]]];
curL[-a[L]] = nx[curL[-a[L]]];
} else {
vis[L] = vis[curL1[a[L]]] = 1;
upd(1, 1, n, L);
upd(1, 1, n, curL1[a[L]]);
curL[a[L]] = nx[curL[a[L]]];
curL1[a[L]] = nx[curL1[a[L]]];
}
} else {
ans += t2;
if (a[R] < 0) {
vis[R] = vis[curR[-a[R]]] = 1;
upd(1, 1, n, R);
upd(1, 1, n, curR[-a[R]]);
curR1[-a[R]] = prv[curR1[-a[R]]];
curR[-a[R]] = prv[curR[-a[R]]];
} else {
vis[R] = vis[curR1[a[R]]] = 1;
upd(1, 1, n, R);
upd(1, 1, n, curR1[a[R]]);
curR[a[R]] = prv[curR[a[R]]];
curR1[a[R]] = prv[curR1[a[R]]];
}
}
while (vis[L])
L++;
while (vis[R])
R--;
if (R < L || L > n || R < 0)
break;
}
return ans;
}
Compilation message
shoes.cpp: In function 'long long int count_swaps(std::vector<int>)':
shoes.cpp:49:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for (int i = 0; i < b.size(); i++)
~~^~~~~~~~~~
shoes.cpp:78:13: warning: unused variable 'crl' [-Wunused-variable]
int crl, crr;
^~~
shoes.cpp:78:18: warning: unused variable 'crr' [-Wunused-variable]
int crl, crr;
^~~
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
7 ms |
6648 KB |
Output is correct |
2 |
Correct |
7 ms |
6648 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
7 ms |
6648 KB |
Output is correct |
2 |
Correct |
7 ms |
6648 KB |
Output is correct |
3 |
Correct |
7 ms |
6648 KB |
Output is correct |
4 |
Correct |
8 ms |
6648 KB |
Output is correct |
5 |
Correct |
7 ms |
6648 KB |
Output is correct |
6 |
Correct |
7 ms |
6648 KB |
Output is correct |
7 |
Correct |
8 ms |
6652 KB |
Output is correct |
8 |
Correct |
8 ms |
6648 KB |
Output is correct |
9 |
Correct |
8 ms |
6648 KB |
Output is correct |
10 |
Correct |
8 ms |
6648 KB |
Output is correct |
11 |
Correct |
8 ms |
6648 KB |
Output is correct |
12 |
Correct |
7 ms |
6648 KB |
Output is correct |
13 |
Correct |
7 ms |
6648 KB |
Output is correct |
14 |
Correct |
8 ms |
6648 KB |
Output is correct |
15 |
Correct |
8 ms |
6648 KB |
Output is correct |
16 |
Correct |
8 ms |
6648 KB |
Output is correct |
17 |
Correct |
8 ms |
6648 KB |
Output is correct |
18 |
Correct |
8 ms |
6648 KB |
Output is correct |
19 |
Correct |
8 ms |
6624 KB |
Output is correct |
20 |
Correct |
8 ms |
6648 KB |
Output is correct |
21 |
Correct |
8 ms |
6648 KB |
Output is correct |
22 |
Correct |
8 ms |
6648 KB |
Output is correct |
23 |
Correct |
8 ms |
6772 KB |
Output is correct |
24 |
Correct |
8 ms |
6648 KB |
Output is correct |
25 |
Correct |
8 ms |
6648 KB |
Output is correct |
26 |
Correct |
8 ms |
6648 KB |
Output is correct |
27 |
Correct |
8 ms |
6648 KB |
Output is correct |
28 |
Correct |
8 ms |
6648 KB |
Output is correct |
29 |
Correct |
8 ms |
6648 KB |
Output is correct |
30 |
Correct |
7 ms |
6648 KB |
Output is correct |
31 |
Correct |
8 ms |
6648 KB |
Output is correct |
32 |
Correct |
8 ms |
6648 KB |
Output is correct |
33 |
Correct |
7 ms |
6648 KB |
Output is correct |
34 |
Correct |
7 ms |
6648 KB |
Output is correct |
35 |
Correct |
7 ms |
6724 KB |
Output is correct |
36 |
Correct |
7 ms |
6648 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
7 ms |
6648 KB |
Output is correct |
2 |
Correct |
7 ms |
6648 KB |
Output is correct |
3 |
Correct |
7 ms |
6648 KB |
Output is correct |
4 |
Correct |
8 ms |
6648 KB |
Output is correct |
5 |
Correct |
7 ms |
6648 KB |
Output is correct |
6 |
Correct |
7 ms |
6648 KB |
Output is correct |
7 |
Correct |
7 ms |
6648 KB |
Output is correct |
8 |
Correct |
8 ms |
6648 KB |
Output is correct |
9 |
Correct |
8 ms |
6652 KB |
Output is correct |
10 |
Correct |
7 ms |
6648 KB |
Output is correct |
11 |
Correct |
19 ms |
6648 KB |
Output is correct |
12 |
Correct |
7 ms |
6648 KB |
Output is correct |
13 |
Correct |
8 ms |
6648 KB |
Output is correct |
14 |
Correct |
8 ms |
6636 KB |
Output is correct |
15 |
Correct |
7 ms |
6648 KB |
Output is correct |
16 |
Correct |
8 ms |
6648 KB |
Output is correct |
17 |
Correct |
8 ms |
6648 KB |
Output is correct |
18 |
Correct |
8 ms |
6776 KB |
Output is correct |
19 |
Correct |
9 ms |
6776 KB |
Output is correct |
20 |
Correct |
17 ms |
7928 KB |
Output is correct |
21 |
Correct |
17 ms |
7928 KB |
Output is correct |
22 |
Correct |
113 ms |
18424 KB |
Output is correct |
23 |
Correct |
103 ms |
18424 KB |
Output is correct |
24 |
Correct |
108 ms |
18516 KB |
Output is correct |
25 |
Correct |
106 ms |
18364 KB |
Output is correct |
26 |
Correct |
111 ms |
18524 KB |
Output is correct |
27 |
Correct |
96 ms |
18296 KB |
Output is correct |
28 |
Correct |
106 ms |
18524 KB |
Output is correct |
29 |
Correct |
106 ms |
18556 KB |
Output is correct |
30 |
Correct |
107 ms |
18524 KB |
Output is correct |
31 |
Correct |
113 ms |
18488 KB |
Output is correct |
32 |
Correct |
107 ms |
18552 KB |
Output is correct |
33 |
Correct |
106 ms |
18424 KB |
Output is correct |
34 |
Correct |
109 ms |
18616 KB |
Output is correct |
35 |
Correct |
8 ms |
6648 KB |
Output is correct |
36 |
Correct |
7 ms |
6648 KB |
Output is correct |
37 |
Correct |
112 ms |
18424 KB |
Output is correct |
38 |
Correct |
106 ms |
18552 KB |
Output is correct |
39 |
Correct |
110 ms |
18524 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
7 ms |
6648 KB |
Output is correct |
2 |
Correct |
7 ms |
6648 KB |
Output is correct |
3 |
Correct |
7 ms |
6648 KB |
Output is correct |
4 |
Correct |
7 ms |
6648 KB |
Output is correct |
5 |
Correct |
133 ms |
20316 KB |
Output is correct |
6 |
Correct |
126 ms |
20316 KB |
Output is correct |
7 |
Correct |
133 ms |
20344 KB |
Output is correct |
8 |
Correct |
216 ms |
17272 KB |
Output is correct |
9 |
Correct |
132 ms |
20536 KB |
Output is correct |
10 |
Correct |
174 ms |
20368 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
7 ms |
6648 KB |
Output is correct |
2 |
Correct |
7 ms |
6648 KB |
Output is correct |
3 |
Correct |
7 ms |
6648 KB |
Output is correct |
4 |
Correct |
8 ms |
6648 KB |
Output is correct |
5 |
Correct |
7 ms |
6648 KB |
Output is correct |
6 |
Correct |
7 ms |
6648 KB |
Output is correct |
7 |
Correct |
8 ms |
6652 KB |
Output is correct |
8 |
Correct |
8 ms |
6648 KB |
Output is correct |
9 |
Correct |
8 ms |
6648 KB |
Output is correct |
10 |
Correct |
8 ms |
6648 KB |
Output is correct |
11 |
Correct |
8 ms |
6648 KB |
Output is correct |
12 |
Correct |
7 ms |
6648 KB |
Output is correct |
13 |
Correct |
7 ms |
6648 KB |
Output is correct |
14 |
Correct |
8 ms |
6648 KB |
Output is correct |
15 |
Correct |
8 ms |
6648 KB |
Output is correct |
16 |
Correct |
8 ms |
6648 KB |
Output is correct |
17 |
Correct |
8 ms |
6648 KB |
Output is correct |
18 |
Correct |
8 ms |
6648 KB |
Output is correct |
19 |
Correct |
8 ms |
6624 KB |
Output is correct |
20 |
Correct |
8 ms |
6648 KB |
Output is correct |
21 |
Correct |
8 ms |
6648 KB |
Output is correct |
22 |
Correct |
8 ms |
6648 KB |
Output is correct |
23 |
Correct |
8 ms |
6772 KB |
Output is correct |
24 |
Correct |
8 ms |
6648 KB |
Output is correct |
25 |
Correct |
8 ms |
6648 KB |
Output is correct |
26 |
Correct |
8 ms |
6648 KB |
Output is correct |
27 |
Correct |
8 ms |
6648 KB |
Output is correct |
28 |
Correct |
8 ms |
6648 KB |
Output is correct |
29 |
Correct |
8 ms |
6648 KB |
Output is correct |
30 |
Correct |
7 ms |
6648 KB |
Output is correct |
31 |
Correct |
8 ms |
6648 KB |
Output is correct |
32 |
Correct |
8 ms |
6648 KB |
Output is correct |
33 |
Correct |
7 ms |
6648 KB |
Output is correct |
34 |
Correct |
7 ms |
6648 KB |
Output is correct |
35 |
Correct |
7 ms |
6724 KB |
Output is correct |
36 |
Correct |
7 ms |
6648 KB |
Output is correct |
37 |
Correct |
7 ms |
6648 KB |
Output is correct |
38 |
Correct |
7 ms |
6648 KB |
Output is correct |
39 |
Correct |
8 ms |
6648 KB |
Output is correct |
40 |
Correct |
8 ms |
6648 KB |
Output is correct |
41 |
Correct |
8 ms |
6776 KB |
Output is correct |
42 |
Correct |
8 ms |
6776 KB |
Output is correct |
43 |
Correct |
8 ms |
6776 KB |
Output is correct |
44 |
Correct |
8 ms |
6776 KB |
Output is correct |
45 |
Correct |
9 ms |
6776 KB |
Output is correct |
46 |
Correct |
8 ms |
6776 KB |
Output is correct |
47 |
Correct |
8 ms |
6776 KB |
Output is correct |
48 |
Correct |
8 ms |
6776 KB |
Output is correct |
49 |
Correct |
9 ms |
6776 KB |
Output is correct |
50 |
Correct |
8 ms |
6776 KB |
Output is correct |
51 |
Correct |
8 ms |
6776 KB |
Output is correct |
52 |
Correct |
9 ms |
6776 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
7 ms |
6648 KB |
Output is correct |
2 |
Correct |
7 ms |
6648 KB |
Output is correct |
3 |
Correct |
7 ms |
6648 KB |
Output is correct |
4 |
Correct |
8 ms |
6648 KB |
Output is correct |
5 |
Correct |
7 ms |
6648 KB |
Output is correct |
6 |
Correct |
7 ms |
6648 KB |
Output is correct |
7 |
Correct |
8 ms |
6652 KB |
Output is correct |
8 |
Correct |
8 ms |
6648 KB |
Output is correct |
9 |
Correct |
8 ms |
6648 KB |
Output is correct |
10 |
Correct |
8 ms |
6648 KB |
Output is correct |
11 |
Correct |
8 ms |
6648 KB |
Output is correct |
12 |
Correct |
7 ms |
6648 KB |
Output is correct |
13 |
Correct |
7 ms |
6648 KB |
Output is correct |
14 |
Correct |
8 ms |
6648 KB |
Output is correct |
15 |
Correct |
8 ms |
6648 KB |
Output is correct |
16 |
Correct |
8 ms |
6648 KB |
Output is correct |
17 |
Correct |
8 ms |
6648 KB |
Output is correct |
18 |
Correct |
8 ms |
6648 KB |
Output is correct |
19 |
Correct |
8 ms |
6624 KB |
Output is correct |
20 |
Correct |
8 ms |
6648 KB |
Output is correct |
21 |
Correct |
8 ms |
6648 KB |
Output is correct |
22 |
Correct |
8 ms |
6648 KB |
Output is correct |
23 |
Correct |
8 ms |
6772 KB |
Output is correct |
24 |
Correct |
8 ms |
6648 KB |
Output is correct |
25 |
Correct |
8 ms |
6648 KB |
Output is correct |
26 |
Correct |
8 ms |
6648 KB |
Output is correct |
27 |
Correct |
8 ms |
6648 KB |
Output is correct |
28 |
Correct |
8 ms |
6648 KB |
Output is correct |
29 |
Correct |
8 ms |
6648 KB |
Output is correct |
30 |
Correct |
7 ms |
6648 KB |
Output is correct |
31 |
Correct |
8 ms |
6648 KB |
Output is correct |
32 |
Correct |
8 ms |
6648 KB |
Output is correct |
33 |
Correct |
7 ms |
6648 KB |
Output is correct |
34 |
Correct |
7 ms |
6648 KB |
Output is correct |
35 |
Correct |
7 ms |
6724 KB |
Output is correct |
36 |
Correct |
7 ms |
6648 KB |
Output is correct |
37 |
Correct |
7 ms |
6648 KB |
Output is correct |
38 |
Correct |
8 ms |
6648 KB |
Output is correct |
39 |
Correct |
7 ms |
6648 KB |
Output is correct |
40 |
Correct |
7 ms |
6648 KB |
Output is correct |
41 |
Correct |
7 ms |
6648 KB |
Output is correct |
42 |
Correct |
8 ms |
6648 KB |
Output is correct |
43 |
Correct |
8 ms |
6652 KB |
Output is correct |
44 |
Correct |
7 ms |
6648 KB |
Output is correct |
45 |
Correct |
19 ms |
6648 KB |
Output is correct |
46 |
Correct |
7 ms |
6648 KB |
Output is correct |
47 |
Correct |
8 ms |
6648 KB |
Output is correct |
48 |
Correct |
8 ms |
6636 KB |
Output is correct |
49 |
Correct |
7 ms |
6648 KB |
Output is correct |
50 |
Correct |
8 ms |
6648 KB |
Output is correct |
51 |
Correct |
8 ms |
6648 KB |
Output is correct |
52 |
Correct |
8 ms |
6776 KB |
Output is correct |
53 |
Correct |
9 ms |
6776 KB |
Output is correct |
54 |
Correct |
17 ms |
7928 KB |
Output is correct |
55 |
Correct |
17 ms |
7928 KB |
Output is correct |
56 |
Correct |
113 ms |
18424 KB |
Output is correct |
57 |
Correct |
103 ms |
18424 KB |
Output is correct |
58 |
Correct |
108 ms |
18516 KB |
Output is correct |
59 |
Correct |
106 ms |
18364 KB |
Output is correct |
60 |
Correct |
111 ms |
18524 KB |
Output is correct |
61 |
Correct |
96 ms |
18296 KB |
Output is correct |
62 |
Correct |
106 ms |
18524 KB |
Output is correct |
63 |
Correct |
106 ms |
18556 KB |
Output is correct |
64 |
Correct |
107 ms |
18524 KB |
Output is correct |
65 |
Correct |
113 ms |
18488 KB |
Output is correct |
66 |
Correct |
107 ms |
18552 KB |
Output is correct |
67 |
Correct |
106 ms |
18424 KB |
Output is correct |
68 |
Correct |
109 ms |
18616 KB |
Output is correct |
69 |
Correct |
8 ms |
6648 KB |
Output is correct |
70 |
Correct |
7 ms |
6648 KB |
Output is correct |
71 |
Correct |
112 ms |
18424 KB |
Output is correct |
72 |
Correct |
106 ms |
18552 KB |
Output is correct |
73 |
Correct |
110 ms |
18524 KB |
Output is correct |
74 |
Correct |
7 ms |
6648 KB |
Output is correct |
75 |
Correct |
7 ms |
6648 KB |
Output is correct |
76 |
Correct |
7 ms |
6648 KB |
Output is correct |
77 |
Correct |
7 ms |
6648 KB |
Output is correct |
78 |
Correct |
133 ms |
20316 KB |
Output is correct |
79 |
Correct |
126 ms |
20316 KB |
Output is correct |
80 |
Correct |
133 ms |
20344 KB |
Output is correct |
81 |
Correct |
216 ms |
17272 KB |
Output is correct |
82 |
Correct |
132 ms |
20536 KB |
Output is correct |
83 |
Correct |
174 ms |
20368 KB |
Output is correct |
84 |
Correct |
7 ms |
6648 KB |
Output is correct |
85 |
Correct |
7 ms |
6648 KB |
Output is correct |
86 |
Correct |
8 ms |
6648 KB |
Output is correct |
87 |
Correct |
8 ms |
6648 KB |
Output is correct |
88 |
Correct |
8 ms |
6776 KB |
Output is correct |
89 |
Correct |
8 ms |
6776 KB |
Output is correct |
90 |
Correct |
8 ms |
6776 KB |
Output is correct |
91 |
Correct |
8 ms |
6776 KB |
Output is correct |
92 |
Correct |
9 ms |
6776 KB |
Output is correct |
93 |
Correct |
8 ms |
6776 KB |
Output is correct |
94 |
Correct |
8 ms |
6776 KB |
Output is correct |
95 |
Correct |
8 ms |
6776 KB |
Output is correct |
96 |
Correct |
9 ms |
6776 KB |
Output is correct |
97 |
Correct |
8 ms |
6776 KB |
Output is correct |
98 |
Correct |
8 ms |
6776 KB |
Output is correct |
99 |
Correct |
9 ms |
6776 KB |
Output is correct |
100 |
Correct |
8 ms |
6780 KB |
Output is correct |
101 |
Correct |
20 ms |
8184 KB |
Output is correct |
102 |
Correct |
20 ms |
8148 KB |
Output is correct |
103 |
Correct |
183 ms |
21752 KB |
Output is correct |
104 |
Correct |
123 ms |
21544 KB |
Output is correct |
105 |
Correct |
147 ms |
21624 KB |
Output is correct |
106 |
Correct |
158 ms |
21580 KB |
Output is correct |
107 |
Correct |
140 ms |
21644 KB |
Output is correct |
108 |
Correct |
133 ms |
21588 KB |
Output is correct |
109 |
Correct |
121 ms |
18424 KB |
Output is correct |
110 |
Correct |
108 ms |
18460 KB |
Output is correct |
111 |
Correct |
128 ms |
21624 KB |
Output is correct |
112 |
Correct |
176 ms |
21752 KB |
Output is correct |
113 |
Correct |
180 ms |
21752 KB |
Output is correct |
114 |
Correct |
151 ms |
21576 KB |
Output is correct |
115 |
Correct |
150 ms |
21624 KB |
Output is correct |