#include "bits/stdc++.h"
using namespace std;
using ll = long long;
const ll inf = 1e9;
const int md1 = 1e9+7;
const int md2 = 998244353;
#define all(v) v.begin(), v.end()
#define rall(v) v.rbegin(), v.rend()
#define sz(v) ((int)v.size())
#define forn(i,n) for(int i = 0; i < n; ++i)
#define forbe(i,b,e) for(int i = b; i < e; ++i)
#define pb push_back
#define pry puts("YES")
#define prn puts("NO")
#define endl '\n'
#define fst first
#define scn second
const int N = 1e5;
bitset<2*N> c;
template<typename T>
struct BIT{
int n;
vector<T> fen;
BIT(int n){
this->n = n;
fen.assign(n,0);
}
BIT(vector<T> a) : BIT(a.size()){
for(int i = 0; i < n; ++i) add(i,a[i]);
}
void add(int x, T v){
for(; x < n; x |= x+1) fen[x] += v;
}
T query(int x){
T res = 0;
for(; x >= 0; x = (x&(x+1))-1)
res += fen[x];
return res;
}
T query(int l, int r){
return query(r) - query(l-1);
}
};
ll
count_swaps(vector<int> s)
{
ll ans = 0;
int balance[sz(s)+1];
vector<int> npos(sz(s),-1);
vector<int> lpos(sz(s),-1);
vector<int> spos(sz(s)+1,-1);
vector<int> sspos(sz(s)+1,-1);
for (int i = 0; i < sz(s); ++i) balance[i+1] = 0;
int size;
BIT<int> deltr(sz(s)+5);
for (int i = 0; i < sz(s); ++i) {
size = abs(s[i]);
if (s[i] > 0) {
if (balance[size] < 0) {
c[i] = 1;
npos[spos[size]] = i;
spos[size] = lpos[spos[size]];
} else {
if (balance[size] == 0) {
spos[size] = i;
sspos[size] = i;
} else {
lpos[sspos[size]] = i;
sspos[size] = i;
}
}
++balance[size];
} else {
if (balance[size] > 0) {
c[i] = 1;
npos[spos[size]] = i;
spos[size] = lpos[spos[size]];
} else {
if (balance[size] == 0) {
spos[size] = i;
sspos[size] = i;
} else {
lpos[sspos[size]] = i;
sspos[size] = i;
}
}
--balance[size];
}
}
for (int i = 0; i < sz(s); ++i) {
if (c[i]) continue;
size = abs(s[i]);
if (s[i] < 0)
--ans;
ans += npos[i] - i - deltr.query(i,npos[i]);
deltr.add(npos[i],1);
}
return ans;
}
#ifdef ONPC
void
solve()
{
int n;
cin >> n;
vector<int> s(n);
for (int i = 0; i < n; ++i)
cin >> s[i];
cout <<count_swaps(s) << endl;
}
int32_t
main()
{
freopen("in", "r", stdin);
int t = 1;
/* cin >> t; */
while(t--)
solve();
}
#endif
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
0 ms |
212 KB |
Output is correct |
2 |
Correct |
0 ms |
212 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
0 ms |
212 KB |
Output is correct |
2 |
Correct |
0 ms |
212 KB |
Output is correct |
3 |
Correct |
0 ms |
212 KB |
Output is correct |
4 |
Correct |
1 ms |
212 KB |
Output is correct |
5 |
Correct |
0 ms |
212 KB |
Output is correct |
6 |
Correct |
0 ms |
220 KB |
Output is correct |
7 |
Correct |
0 ms |
224 KB |
Output is correct |
8 |
Correct |
0 ms |
224 KB |
Output is correct |
9 |
Correct |
1 ms |
224 KB |
Output is correct |
10 |
Correct |
0 ms |
224 KB |
Output is correct |
11 |
Correct |
0 ms |
224 KB |
Output is correct |
12 |
Correct |
1 ms |
224 KB |
Output is correct |
13 |
Correct |
0 ms |
224 KB |
Output is correct |
14 |
Correct |
0 ms |
224 KB |
Output is correct |
15 |
Correct |
1 ms |
224 KB |
Output is correct |
16 |
Correct |
1 ms |
224 KB |
Output is correct |
17 |
Correct |
1 ms |
224 KB |
Output is correct |
18 |
Correct |
0 ms |
224 KB |
Output is correct |
19 |
Correct |
0 ms |
212 KB |
Output is correct |
20 |
Correct |
0 ms |
212 KB |
Output is correct |
21 |
Correct |
0 ms |
212 KB |
Output is correct |
22 |
Correct |
0 ms |
212 KB |
Output is correct |
23 |
Correct |
0 ms |
212 KB |
Output is correct |
24 |
Correct |
1 ms |
212 KB |
Output is correct |
25 |
Correct |
0 ms |
212 KB |
Output is correct |
26 |
Correct |
1 ms |
212 KB |
Output is correct |
27 |
Correct |
0 ms |
212 KB |
Output is correct |
28 |
Correct |
1 ms |
212 KB |
Output is correct |
29 |
Correct |
0 ms |
212 KB |
Output is correct |
30 |
Correct |
0 ms |
212 KB |
Output is correct |
31 |
Correct |
1 ms |
212 KB |
Output is correct |
32 |
Correct |
1 ms |
212 KB |
Output is correct |
33 |
Correct |
1 ms |
212 KB |
Output is correct |
34 |
Correct |
0 ms |
212 KB |
Output is correct |
35 |
Correct |
0 ms |
212 KB |
Output is correct |
36 |
Correct |
0 ms |
212 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
0 ms |
212 KB |
Output is correct |
2 |
Correct |
0 ms |
212 KB |
Output is correct |
3 |
Correct |
0 ms |
224 KB |
Output is correct |
4 |
Correct |
0 ms |
224 KB |
Output is correct |
5 |
Correct |
1 ms |
224 KB |
Output is correct |
6 |
Correct |
1 ms |
224 KB |
Output is correct |
7 |
Correct |
0 ms |
224 KB |
Output is correct |
8 |
Correct |
0 ms |
224 KB |
Output is correct |
9 |
Correct |
0 ms |
224 KB |
Output is correct |
10 |
Correct |
0 ms |
224 KB |
Output is correct |
11 |
Correct |
0 ms |
224 KB |
Output is correct |
12 |
Correct |
0 ms |
224 KB |
Output is correct |
13 |
Correct |
0 ms |
224 KB |
Output is correct |
14 |
Correct |
1 ms |
224 KB |
Output is correct |
15 |
Correct |
1 ms |
224 KB |
Output is correct |
16 |
Correct |
0 ms |
224 KB |
Output is correct |
17 |
Correct |
0 ms |
224 KB |
Output is correct |
18 |
Correct |
1 ms |
352 KB |
Output is correct |
19 |
Correct |
1 ms |
352 KB |
Output is correct |
20 |
Correct |
3 ms |
864 KB |
Output is correct |
21 |
Correct |
3 ms |
864 KB |
Output is correct |
22 |
Correct |
28 ms |
6564 KB |
Output is correct |
23 |
Correct |
25 ms |
6624 KB |
Output is correct |
24 |
Correct |
27 ms |
6612 KB |
Output is correct |
25 |
Correct |
23 ms |
6480 KB |
Output is correct |
26 |
Correct |
30 ms |
6548 KB |
Output is correct |
27 |
Correct |
32 ms |
6616 KB |
Output is correct |
28 |
Correct |
29 ms |
6488 KB |
Output is correct |
29 |
Correct |
24 ms |
6608 KB |
Output is correct |
30 |
Correct |
25 ms |
6608 KB |
Output is correct |
31 |
Correct |
26 ms |
6612 KB |
Output is correct |
32 |
Correct |
24 ms |
6496 KB |
Output is correct |
33 |
Correct |
26 ms |
6612 KB |
Output is correct |
34 |
Correct |
27 ms |
6496 KB |
Output is correct |
35 |
Correct |
0 ms |
224 KB |
Output is correct |
36 |
Correct |
1 ms |
224 KB |
Output is correct |
37 |
Correct |
26 ms |
6592 KB |
Output is correct |
38 |
Correct |
28 ms |
6604 KB |
Output is correct |
39 |
Correct |
24 ms |
6476 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
0 ms |
212 KB |
Output is correct |
2 |
Correct |
0 ms |
212 KB |
Output is correct |
3 |
Correct |
0 ms |
212 KB |
Output is correct |
4 |
Correct |
0 ms |
212 KB |
Output is correct |
5 |
Correct |
27 ms |
6520 KB |
Output is correct |
6 |
Correct |
25 ms |
6552 KB |
Output is correct |
7 |
Correct |
25 ms |
6596 KB |
Output is correct |
8 |
Correct |
26 ms |
6568 KB |
Output is correct |
9 |
Correct |
29 ms |
6468 KB |
Output is correct |
10 |
Correct |
28 ms |
6592 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
0 ms |
212 KB |
Output is correct |
2 |
Correct |
0 ms |
212 KB |
Output is correct |
3 |
Correct |
0 ms |
212 KB |
Output is correct |
4 |
Correct |
1 ms |
212 KB |
Output is correct |
5 |
Correct |
0 ms |
212 KB |
Output is correct |
6 |
Correct |
0 ms |
220 KB |
Output is correct |
7 |
Correct |
0 ms |
224 KB |
Output is correct |
8 |
Correct |
0 ms |
224 KB |
Output is correct |
9 |
Correct |
1 ms |
224 KB |
Output is correct |
10 |
Correct |
0 ms |
224 KB |
Output is correct |
11 |
Correct |
0 ms |
224 KB |
Output is correct |
12 |
Correct |
1 ms |
224 KB |
Output is correct |
13 |
Correct |
0 ms |
224 KB |
Output is correct |
14 |
Correct |
0 ms |
224 KB |
Output is correct |
15 |
Correct |
1 ms |
224 KB |
Output is correct |
16 |
Correct |
1 ms |
224 KB |
Output is correct |
17 |
Correct |
1 ms |
224 KB |
Output is correct |
18 |
Correct |
0 ms |
224 KB |
Output is correct |
19 |
Correct |
0 ms |
212 KB |
Output is correct |
20 |
Correct |
0 ms |
212 KB |
Output is correct |
21 |
Correct |
0 ms |
212 KB |
Output is correct |
22 |
Correct |
0 ms |
212 KB |
Output is correct |
23 |
Correct |
0 ms |
212 KB |
Output is correct |
24 |
Correct |
1 ms |
212 KB |
Output is correct |
25 |
Correct |
0 ms |
212 KB |
Output is correct |
26 |
Correct |
1 ms |
212 KB |
Output is correct |
27 |
Correct |
0 ms |
212 KB |
Output is correct |
28 |
Correct |
1 ms |
212 KB |
Output is correct |
29 |
Correct |
0 ms |
212 KB |
Output is correct |
30 |
Correct |
0 ms |
212 KB |
Output is correct |
31 |
Correct |
1 ms |
212 KB |
Output is correct |
32 |
Correct |
1 ms |
212 KB |
Output is correct |
33 |
Correct |
1 ms |
212 KB |
Output is correct |
34 |
Correct |
0 ms |
212 KB |
Output is correct |
35 |
Correct |
0 ms |
212 KB |
Output is correct |
36 |
Correct |
0 ms |
212 KB |
Output is correct |
37 |
Correct |
0 ms |
212 KB |
Output is correct |
38 |
Correct |
0 ms |
212 KB |
Output is correct |
39 |
Correct |
0 ms |
212 KB |
Output is correct |
40 |
Correct |
0 ms |
212 KB |
Output is correct |
41 |
Correct |
0 ms |
340 KB |
Output is correct |
42 |
Correct |
1 ms |
340 KB |
Output is correct |
43 |
Correct |
1 ms |
340 KB |
Output is correct |
44 |
Correct |
1 ms |
340 KB |
Output is correct |
45 |
Correct |
1 ms |
340 KB |
Output is correct |
46 |
Correct |
1 ms |
340 KB |
Output is correct |
47 |
Correct |
1 ms |
340 KB |
Output is correct |
48 |
Correct |
1 ms |
340 KB |
Output is correct |
49 |
Correct |
1 ms |
340 KB |
Output is correct |
50 |
Correct |
1 ms |
340 KB |
Output is correct |
51 |
Correct |
1 ms |
340 KB |
Output is correct |
52 |
Correct |
1 ms |
340 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
0 ms |
212 KB |
Output is correct |
2 |
Correct |
0 ms |
212 KB |
Output is correct |
3 |
Correct |
0 ms |
212 KB |
Output is correct |
4 |
Correct |
1 ms |
212 KB |
Output is correct |
5 |
Correct |
0 ms |
212 KB |
Output is correct |
6 |
Correct |
0 ms |
220 KB |
Output is correct |
7 |
Correct |
0 ms |
224 KB |
Output is correct |
8 |
Correct |
0 ms |
224 KB |
Output is correct |
9 |
Correct |
1 ms |
224 KB |
Output is correct |
10 |
Correct |
0 ms |
224 KB |
Output is correct |
11 |
Correct |
0 ms |
224 KB |
Output is correct |
12 |
Correct |
1 ms |
224 KB |
Output is correct |
13 |
Correct |
0 ms |
224 KB |
Output is correct |
14 |
Correct |
0 ms |
224 KB |
Output is correct |
15 |
Correct |
1 ms |
224 KB |
Output is correct |
16 |
Correct |
1 ms |
224 KB |
Output is correct |
17 |
Correct |
1 ms |
224 KB |
Output is correct |
18 |
Correct |
0 ms |
224 KB |
Output is correct |
19 |
Correct |
0 ms |
212 KB |
Output is correct |
20 |
Correct |
0 ms |
212 KB |
Output is correct |
21 |
Correct |
0 ms |
212 KB |
Output is correct |
22 |
Correct |
0 ms |
212 KB |
Output is correct |
23 |
Correct |
0 ms |
212 KB |
Output is correct |
24 |
Correct |
1 ms |
212 KB |
Output is correct |
25 |
Correct |
0 ms |
212 KB |
Output is correct |
26 |
Correct |
1 ms |
212 KB |
Output is correct |
27 |
Correct |
0 ms |
212 KB |
Output is correct |
28 |
Correct |
1 ms |
212 KB |
Output is correct |
29 |
Correct |
0 ms |
212 KB |
Output is correct |
30 |
Correct |
0 ms |
212 KB |
Output is correct |
31 |
Correct |
1 ms |
212 KB |
Output is correct |
32 |
Correct |
1 ms |
212 KB |
Output is correct |
33 |
Correct |
1 ms |
212 KB |
Output is correct |
34 |
Correct |
0 ms |
212 KB |
Output is correct |
35 |
Correct |
0 ms |
212 KB |
Output is correct |
36 |
Correct |
0 ms |
212 KB |
Output is correct |
37 |
Correct |
0 ms |
224 KB |
Output is correct |
38 |
Correct |
0 ms |
224 KB |
Output is correct |
39 |
Correct |
1 ms |
224 KB |
Output is correct |
40 |
Correct |
1 ms |
224 KB |
Output is correct |
41 |
Correct |
0 ms |
224 KB |
Output is correct |
42 |
Correct |
0 ms |
224 KB |
Output is correct |
43 |
Correct |
0 ms |
224 KB |
Output is correct |
44 |
Correct |
0 ms |
224 KB |
Output is correct |
45 |
Correct |
0 ms |
224 KB |
Output is correct |
46 |
Correct |
0 ms |
224 KB |
Output is correct |
47 |
Correct |
0 ms |
224 KB |
Output is correct |
48 |
Correct |
1 ms |
224 KB |
Output is correct |
49 |
Correct |
1 ms |
224 KB |
Output is correct |
50 |
Correct |
0 ms |
224 KB |
Output is correct |
51 |
Correct |
0 ms |
224 KB |
Output is correct |
52 |
Correct |
1 ms |
352 KB |
Output is correct |
53 |
Correct |
1 ms |
352 KB |
Output is correct |
54 |
Correct |
3 ms |
864 KB |
Output is correct |
55 |
Correct |
3 ms |
864 KB |
Output is correct |
56 |
Correct |
28 ms |
6564 KB |
Output is correct |
57 |
Correct |
25 ms |
6624 KB |
Output is correct |
58 |
Correct |
27 ms |
6612 KB |
Output is correct |
59 |
Correct |
23 ms |
6480 KB |
Output is correct |
60 |
Correct |
30 ms |
6548 KB |
Output is correct |
61 |
Correct |
32 ms |
6616 KB |
Output is correct |
62 |
Correct |
29 ms |
6488 KB |
Output is correct |
63 |
Correct |
24 ms |
6608 KB |
Output is correct |
64 |
Correct |
25 ms |
6608 KB |
Output is correct |
65 |
Correct |
26 ms |
6612 KB |
Output is correct |
66 |
Correct |
24 ms |
6496 KB |
Output is correct |
67 |
Correct |
26 ms |
6612 KB |
Output is correct |
68 |
Correct |
27 ms |
6496 KB |
Output is correct |
69 |
Correct |
0 ms |
224 KB |
Output is correct |
70 |
Correct |
1 ms |
224 KB |
Output is correct |
71 |
Correct |
26 ms |
6592 KB |
Output is correct |
72 |
Correct |
28 ms |
6604 KB |
Output is correct |
73 |
Correct |
24 ms |
6476 KB |
Output is correct |
74 |
Correct |
0 ms |
212 KB |
Output is correct |
75 |
Correct |
0 ms |
212 KB |
Output is correct |
76 |
Correct |
0 ms |
212 KB |
Output is correct |
77 |
Correct |
0 ms |
212 KB |
Output is correct |
78 |
Correct |
27 ms |
6520 KB |
Output is correct |
79 |
Correct |
25 ms |
6552 KB |
Output is correct |
80 |
Correct |
25 ms |
6596 KB |
Output is correct |
81 |
Correct |
26 ms |
6568 KB |
Output is correct |
82 |
Correct |
29 ms |
6468 KB |
Output is correct |
83 |
Correct |
28 ms |
6592 KB |
Output is correct |
84 |
Correct |
0 ms |
212 KB |
Output is correct |
85 |
Correct |
0 ms |
212 KB |
Output is correct |
86 |
Correct |
0 ms |
212 KB |
Output is correct |
87 |
Correct |
0 ms |
212 KB |
Output is correct |
88 |
Correct |
0 ms |
340 KB |
Output is correct |
89 |
Correct |
1 ms |
340 KB |
Output is correct |
90 |
Correct |
1 ms |
340 KB |
Output is correct |
91 |
Correct |
1 ms |
340 KB |
Output is correct |
92 |
Correct |
1 ms |
340 KB |
Output is correct |
93 |
Correct |
1 ms |
340 KB |
Output is correct |
94 |
Correct |
1 ms |
340 KB |
Output is correct |
95 |
Correct |
1 ms |
340 KB |
Output is correct |
96 |
Correct |
1 ms |
340 KB |
Output is correct |
97 |
Correct |
1 ms |
340 KB |
Output is correct |
98 |
Correct |
1 ms |
340 KB |
Output is correct |
99 |
Correct |
1 ms |
340 KB |
Output is correct |
100 |
Correct |
1 ms |
340 KB |
Output is correct |
101 |
Correct |
3 ms |
852 KB |
Output is correct |
102 |
Correct |
3 ms |
852 KB |
Output is correct |
103 |
Correct |
29 ms |
6612 KB |
Output is correct |
104 |
Correct |
25 ms |
6600 KB |
Output is correct |
105 |
Correct |
29 ms |
6608 KB |
Output is correct |
106 |
Correct |
31 ms |
6556 KB |
Output is correct |
107 |
Correct |
27 ms |
6464 KB |
Output is correct |
108 |
Correct |
26 ms |
6484 KB |
Output is correct |
109 |
Correct |
26 ms |
6584 KB |
Output is correct |
110 |
Correct |
29 ms |
6476 KB |
Output is correct |
111 |
Correct |
29 ms |
6584 KB |
Output is correct |
112 |
Correct |
27 ms |
6604 KB |
Output is correct |
113 |
Correct |
27 ms |
6472 KB |
Output is correct |
114 |
Correct |
28 ms |
6476 KB |
Output is correct |
115 |
Correct |
25 ms |
6604 KB |
Output is correct |