// Source: https://usaco.guide/general/io
#include <bits/stdc++.h>
#define ll long long
#define ff first
#define ss second
#define ln "\n"
const ll INF = 2e18;
const ll MOD = 1e9+7;
using namespace std;
struct Fenwick{
vector<ll> t;
ll n;
Fenwick(ll sz){
n = sz;
t.resize(n+1, 0);
}
void update(ll i, ll ch){
for (; i<=n; i+=(-i&i)) t[i]+=ch;
}
ll get(ll i){
ll sum = 0;
for (; i; i-=(-i&i)) sum+=t[i];
return sum;
}
};
long long count_swaps(vector<int> S){
ll n = S.size()/2;
Fenwick tr(2*n+1);
for (ll i=0; i<2*n; i++){
tr.update(i+1, 1);
}
unordered_map<ll, queue<ll>> pt;
vector<ll> elp(2*n, -1);
for (ll i=0; i<2*n; i++){
if (pt[-S[i]].empty()) {
pt[S[i]].push(i);
}else{
ll front = pt[-S[i]].front();
pt[-S[i]].pop();
elp[front]=i;
}
}
ll ans = 0;
for (ll i=0; i<2*n; i++){
if (elp[i]==-1) continue;
ll dif = tr.get(elp[i]+1)-tr.get(i+1)-1;
if (S[i]>0){
dif++;
}
ans+=dif;
tr.update(elp[i]+1, -1);
tr.update(i+1, -1);
}
return ans;
}
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
348 KB |
Output is correct |
2 |
Correct |
0 ms |
348 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 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 |
1 ms |
348 KB |
Output is correct |
5 |
Correct |
1 ms |
344 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 |
348 KB |
Output is correct |
9 |
Correct |
1 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 |
1 ms |
348 KB |
Output is correct |
14 |
Correct |
1 ms |
348 KB |
Output is correct |
15 |
Correct |
0 ms |
348 KB |
Output is correct |
16 |
Correct |
1 ms |
348 KB |
Output is correct |
17 |
Correct |
1 ms |
348 KB |
Output is correct |
18 |
Correct |
1 ms |
348 KB |
Output is correct |
19 |
Correct |
1 ms |
600 KB |
Output is correct |
20 |
Correct |
1 ms |
344 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 |
344 KB |
Output is correct |
25 |
Correct |
1 ms |
348 KB |
Output is correct |
26 |
Correct |
1 ms |
344 KB |
Output is correct |
27 |
Correct |
1 ms |
348 KB |
Output is correct |
28 |
Correct |
1 ms |
432 KB |
Output is correct |
29 |
Correct |
1 ms |
344 KB |
Output is correct |
30 |
Correct |
1 ms |
348 KB |
Output is correct |
31 |
Correct |
1 ms |
348 KB |
Output is correct |
32 |
Correct |
1 ms |
344 KB |
Output is correct |
33 |
Correct |
1 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 |
1 ms |
408 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 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 |
1 ms |
348 KB |
Output is correct |
5 |
Correct |
1 ms |
348 KB |
Output is correct |
6 |
Correct |
1 ms |
344 KB |
Output is correct |
7 |
Correct |
0 ms |
348 KB |
Output is correct |
8 |
Correct |
1 ms |
348 KB |
Output is correct |
9 |
Correct |
1 ms |
348 KB |
Output is correct |
10 |
Correct |
1 ms |
348 KB |
Output is correct |
11 |
Correct |
1 ms |
600 KB |
Output is correct |
12 |
Correct |
1 ms |
348 KB |
Output is correct |
13 |
Correct |
1 ms |
348 KB |
Output is correct |
14 |
Correct |
1 ms |
348 KB |
Output is correct |
15 |
Correct |
0 ms |
348 KB |
Output is correct |
16 |
Correct |
1 ms |
348 KB |
Output is correct |
17 |
Correct |
1 ms |
344 KB |
Output is correct |
18 |
Correct |
1 ms |
344 KB |
Output is correct |
19 |
Correct |
1 ms |
600 KB |
Output is correct |
20 |
Correct |
4 ms |
856 KB |
Output is correct |
21 |
Correct |
4 ms |
860 KB |
Output is correct |
22 |
Correct |
34 ms |
6204 KB |
Output is correct |
23 |
Correct |
30 ms |
6228 KB |
Output is correct |
24 |
Correct |
36 ms |
6236 KB |
Output is correct |
25 |
Correct |
36 ms |
6992 KB |
Output is correct |
26 |
Correct |
34 ms |
6236 KB |
Output is correct |
27 |
Correct |
28 ms |
6072 KB |
Output is correct |
28 |
Correct |
34 ms |
6996 KB |
Output is correct |
29 |
Correct |
37 ms |
7004 KB |
Output is correct |
30 |
Correct |
39 ms |
7264 KB |
Output is correct |
31 |
Correct |
36 ms |
6232 KB |
Output is correct |
32 |
Correct |
41 ms |
7220 KB |
Output is correct |
33 |
Correct |
36 ms |
6968 KB |
Output is correct |
34 |
Correct |
36 ms |
6992 KB |
Output is correct |
35 |
Correct |
1 ms |
344 KB |
Output is correct |
36 |
Correct |
1 ms |
348 KB |
Output is correct |
37 |
Correct |
38 ms |
7104 KB |
Output is correct |
38 |
Correct |
39 ms |
7004 KB |
Output is correct |
39 |
Correct |
40 ms |
6992 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
348 KB |
Output is correct |
2 |
Correct |
1 ms |
504 KB |
Output is correct |
3 |
Correct |
1 ms |
348 KB |
Output is correct |
4 |
Correct |
1 ms |
348 KB |
Output is correct |
5 |
Correct |
357 ms |
150016 KB |
Output is correct |
6 |
Correct |
61 ms |
18768 KB |
Output is correct |
7 |
Correct |
344 ms |
149896 KB |
Output is correct |
8 |
Correct |
41 ms |
7004 KB |
Output is correct |
9 |
Correct |
367 ms |
150060 KB |
Output is correct |
10 |
Correct |
185 ms |
78180 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 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 |
1 ms |
348 KB |
Output is correct |
5 |
Correct |
1 ms |
344 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 |
348 KB |
Output is correct |
9 |
Correct |
1 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 |
1 ms |
348 KB |
Output is correct |
14 |
Correct |
1 ms |
348 KB |
Output is correct |
15 |
Correct |
0 ms |
348 KB |
Output is correct |
16 |
Correct |
1 ms |
348 KB |
Output is correct |
17 |
Correct |
1 ms |
348 KB |
Output is correct |
18 |
Correct |
1 ms |
348 KB |
Output is correct |
19 |
Correct |
1 ms |
600 KB |
Output is correct |
20 |
Correct |
1 ms |
344 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 |
344 KB |
Output is correct |
25 |
Correct |
1 ms |
348 KB |
Output is correct |
26 |
Correct |
1 ms |
344 KB |
Output is correct |
27 |
Correct |
1 ms |
348 KB |
Output is correct |
28 |
Correct |
1 ms |
432 KB |
Output is correct |
29 |
Correct |
1 ms |
344 KB |
Output is correct |
30 |
Correct |
1 ms |
348 KB |
Output is correct |
31 |
Correct |
1 ms |
348 KB |
Output is correct |
32 |
Correct |
1 ms |
344 KB |
Output is correct |
33 |
Correct |
1 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 |
1 ms |
408 KB |
Output is correct |
37 |
Correct |
0 ms |
348 KB |
Output is correct |
38 |
Correct |
0 ms |
432 KB |
Output is correct |
39 |
Correct |
1 ms |
344 KB |
Output is correct |
40 |
Correct |
1 ms |
604 KB |
Output is correct |
41 |
Correct |
2 ms |
1884 KB |
Output is correct |
42 |
Correct |
2 ms |
1884 KB |
Output is correct |
43 |
Correct |
1 ms |
1628 KB |
Output is correct |
44 |
Correct |
2 ms |
1372 KB |
Output is correct |
45 |
Correct |
2 ms |
1372 KB |
Output is correct |
46 |
Correct |
2 ms |
1112 KB |
Output is correct |
47 |
Correct |
1 ms |
860 KB |
Output is correct |
48 |
Correct |
1 ms |
860 KB |
Output is correct |
49 |
Correct |
1 ms |
604 KB |
Output is correct |
50 |
Correct |
1 ms |
348 KB |
Output is correct |
51 |
Correct |
1 ms |
348 KB |
Output is correct |
52 |
Correct |
2 ms |
1884 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 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 |
1 ms |
348 KB |
Output is correct |
5 |
Correct |
1 ms |
344 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 |
348 KB |
Output is correct |
9 |
Correct |
1 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 |
1 ms |
348 KB |
Output is correct |
14 |
Correct |
1 ms |
348 KB |
Output is correct |
15 |
Correct |
0 ms |
348 KB |
Output is correct |
16 |
Correct |
1 ms |
348 KB |
Output is correct |
17 |
Correct |
1 ms |
348 KB |
Output is correct |
18 |
Correct |
1 ms |
348 KB |
Output is correct |
19 |
Correct |
1 ms |
600 KB |
Output is correct |
20 |
Correct |
1 ms |
344 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 |
344 KB |
Output is correct |
25 |
Correct |
1 ms |
348 KB |
Output is correct |
26 |
Correct |
1 ms |
344 KB |
Output is correct |
27 |
Correct |
1 ms |
348 KB |
Output is correct |
28 |
Correct |
1 ms |
432 KB |
Output is correct |
29 |
Correct |
1 ms |
344 KB |
Output is correct |
30 |
Correct |
1 ms |
348 KB |
Output is correct |
31 |
Correct |
1 ms |
348 KB |
Output is correct |
32 |
Correct |
1 ms |
344 KB |
Output is correct |
33 |
Correct |
1 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 |
1 ms |
408 KB |
Output is correct |
37 |
Correct |
1 ms |
348 KB |
Output is correct |
38 |
Correct |
1 ms |
348 KB |
Output is correct |
39 |
Correct |
1 ms |
348 KB |
Output is correct |
40 |
Correct |
1 ms |
344 KB |
Output is correct |
41 |
Correct |
0 ms |
348 KB |
Output is correct |
42 |
Correct |
1 ms |
348 KB |
Output is correct |
43 |
Correct |
1 ms |
348 KB |
Output is correct |
44 |
Correct |
1 ms |
348 KB |
Output is correct |
45 |
Correct |
1 ms |
600 KB |
Output is correct |
46 |
Correct |
1 ms |
348 KB |
Output is correct |
47 |
Correct |
1 ms |
348 KB |
Output is correct |
48 |
Correct |
1 ms |
348 KB |
Output is correct |
49 |
Correct |
0 ms |
348 KB |
Output is correct |
50 |
Correct |
1 ms |
348 KB |
Output is correct |
51 |
Correct |
1 ms |
344 KB |
Output is correct |
52 |
Correct |
1 ms |
344 KB |
Output is correct |
53 |
Correct |
1 ms |
600 KB |
Output is correct |
54 |
Correct |
4 ms |
856 KB |
Output is correct |
55 |
Correct |
4 ms |
860 KB |
Output is correct |
56 |
Correct |
34 ms |
6204 KB |
Output is correct |
57 |
Correct |
30 ms |
6228 KB |
Output is correct |
58 |
Correct |
36 ms |
6236 KB |
Output is correct |
59 |
Correct |
36 ms |
6992 KB |
Output is correct |
60 |
Correct |
34 ms |
6236 KB |
Output is correct |
61 |
Correct |
28 ms |
6072 KB |
Output is correct |
62 |
Correct |
34 ms |
6996 KB |
Output is correct |
63 |
Correct |
37 ms |
7004 KB |
Output is correct |
64 |
Correct |
39 ms |
7264 KB |
Output is correct |
65 |
Correct |
36 ms |
6232 KB |
Output is correct |
66 |
Correct |
41 ms |
7220 KB |
Output is correct |
67 |
Correct |
36 ms |
6968 KB |
Output is correct |
68 |
Correct |
36 ms |
6992 KB |
Output is correct |
69 |
Correct |
1 ms |
344 KB |
Output is correct |
70 |
Correct |
1 ms |
348 KB |
Output is correct |
71 |
Correct |
38 ms |
7104 KB |
Output is correct |
72 |
Correct |
39 ms |
7004 KB |
Output is correct |
73 |
Correct |
40 ms |
6992 KB |
Output is correct |
74 |
Correct |
1 ms |
348 KB |
Output is correct |
75 |
Correct |
1 ms |
504 KB |
Output is correct |
76 |
Correct |
1 ms |
348 KB |
Output is correct |
77 |
Correct |
1 ms |
348 KB |
Output is correct |
78 |
Correct |
357 ms |
150016 KB |
Output is correct |
79 |
Correct |
61 ms |
18768 KB |
Output is correct |
80 |
Correct |
344 ms |
149896 KB |
Output is correct |
81 |
Correct |
41 ms |
7004 KB |
Output is correct |
82 |
Correct |
367 ms |
150060 KB |
Output is correct |
83 |
Correct |
185 ms |
78180 KB |
Output is correct |
84 |
Correct |
0 ms |
348 KB |
Output is correct |
85 |
Correct |
0 ms |
432 KB |
Output is correct |
86 |
Correct |
1 ms |
344 KB |
Output is correct |
87 |
Correct |
1 ms |
604 KB |
Output is correct |
88 |
Correct |
2 ms |
1884 KB |
Output is correct |
89 |
Correct |
2 ms |
1884 KB |
Output is correct |
90 |
Correct |
1 ms |
1628 KB |
Output is correct |
91 |
Correct |
2 ms |
1372 KB |
Output is correct |
92 |
Correct |
2 ms |
1372 KB |
Output is correct |
93 |
Correct |
2 ms |
1112 KB |
Output is correct |
94 |
Correct |
1 ms |
860 KB |
Output is correct |
95 |
Correct |
1 ms |
860 KB |
Output is correct |
96 |
Correct |
1 ms |
604 KB |
Output is correct |
97 |
Correct |
1 ms |
348 KB |
Output is correct |
98 |
Correct |
1 ms |
348 KB |
Output is correct |
99 |
Correct |
2 ms |
1884 KB |
Output is correct |
100 |
Correct |
2 ms |
1884 KB |
Output is correct |
101 |
Correct |
15 ms |
13744 KB |
Output is correct |
102 |
Correct |
9 ms |
3928 KB |
Output is correct |
103 |
Correct |
384 ms |
149880 KB |
Output is correct |
104 |
Correct |
313 ms |
149984 KB |
Output is correct |
105 |
Correct |
203 ms |
87492 KB |
Output is correct |
106 |
Correct |
346 ms |
149900 KB |
Output is correct |
107 |
Correct |
59 ms |
22188 KB |
Output is correct |
108 |
Correct |
84 ms |
38152 KB |
Output is correct |
109 |
Correct |
36 ms |
7232 KB |
Output is correct |
110 |
Correct |
39 ms |
7204 KB |
Output is correct |
111 |
Correct |
323 ms |
134192 KB |
Output is correct |
112 |
Correct |
260 ms |
117192 KB |
Output is correct |
113 |
Correct |
67 ms |
23984 KB |
Output is correct |
114 |
Correct |
373 ms |
149924 KB |
Output is correct |
115 |
Correct |
351 ms |
150020 KB |
Output is correct |