#include <bits/stdc++.h>
using namespace std;
#define dbgv(v) cout<<#v<<" = "; f(i,0,v.size()) cout<<v[i]<<" "; cout<<endl
#define dbga(a,x,y) cout<<#a<<" = "; f(i,x,y) cout<<a[i]<<" "; cout<<endl
#define erorp(x) cout<<#x<<"={"<<(x.F)<<" , "<<x.S<<"}"<<endl
#define eror(x) cout<<#x<<'='<<(x)<<endl
#define f_(i,a,b) for(int i=a;i>=b;i--)
#define f(i,a,b) for(int i=a;i<b;i++)
#define nb(x) __builtin_popcount(x)
#define all(v) v.begin(),v.end()
#define bit(n,k) (((n)>>(k))&1)
#define Add(x,y) x=(x+y)%mod
#define maxm(a,b) a=max(a,b)
#define minm(a,b) a=min(a,b)
#define lst(x) x[x.size()-1]
#define sz(x) int(x.size())
#define mp make_pair
#define ll long long
#define pb push_back
#define S second
#define F first
const int N=4e5+99;
int n,a[N],L[N],R[N],fenwik[N];
string s;
vector<int> vec0,vec1;
void add(int x, int val){ for (x++;x>0;x-=x&-x) fenwik[x]+=val; }
int get(int x) { int res=0; for(x++;x<N;x+=x&-x) res+=fenwik[x]; return res; }
ll calc(int shift){
f(i,0,N) fenwik[i]=0;
ll res=0;
f(i,0,n){
L[i]=min(vec0[i],vec1[(i+shift)%n]);
R[i]=max(vec0[i],vec1[(i+shift)%n]);
a[L[i]]=i;
a[R[i]]=i;
}
f(i,0,2*n){
if(L[a[i]]==i){
add(i,1);
}
else{
add(L[a[i]],-1);
res+=get(L[a[i]]);
}
}
return res;
}
int32_t main(){
ios:: sync_with_stdio(0), cin.tie(0), cout.tie(0);
cin>>n>>s;
f(i,0,2*n) if(s[i]==s[0]) vec0.pb(i); else vec1.pb(i);
int l=-1,r=n-1;
while(l+1<r){
int mid=(l+r)>>1;
if(calc(mid)<calc(mid+1)){
l=mid;
}
else{
r=mid;
}
}
cout<<calc(r);
}
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
1876 KB |
Output is correct |
2 |
Correct |
2 ms |
1876 KB |
Output is correct |
3 |
Correct |
1 ms |
1876 KB |
Output is correct |
4 |
Correct |
1 ms |
1876 KB |
Output is correct |
5 |
Correct |
2 ms |
1876 KB |
Output is correct |
6 |
Correct |
1 ms |
1876 KB |
Output is correct |
7 |
Correct |
1 ms |
1876 KB |
Output is correct |
8 |
Correct |
2 ms |
1876 KB |
Output is correct |
9 |
Correct |
1 ms |
1876 KB |
Output is correct |
10 |
Correct |
1 ms |
1876 KB |
Output is correct |
11 |
Correct |
1 ms |
1876 KB |
Output is correct |
12 |
Correct |
1 ms |
1876 KB |
Output is correct |
13 |
Correct |
1 ms |
1876 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
1876 KB |
Output is correct |
2 |
Correct |
2 ms |
1876 KB |
Output is correct |
3 |
Correct |
1 ms |
1876 KB |
Output is correct |
4 |
Correct |
1 ms |
1876 KB |
Output is correct |
5 |
Correct |
2 ms |
1876 KB |
Output is correct |
6 |
Correct |
1 ms |
1876 KB |
Output is correct |
7 |
Correct |
1 ms |
1876 KB |
Output is correct |
8 |
Correct |
2 ms |
1876 KB |
Output is correct |
9 |
Correct |
1 ms |
1876 KB |
Output is correct |
10 |
Correct |
1 ms |
1876 KB |
Output is correct |
11 |
Correct |
1 ms |
1876 KB |
Output is correct |
12 |
Correct |
1 ms |
1876 KB |
Output is correct |
13 |
Correct |
1 ms |
1876 KB |
Output is correct |
14 |
Correct |
2 ms |
1876 KB |
Output is correct |
15 |
Correct |
2 ms |
1876 KB |
Output is correct |
16 |
Correct |
2 ms |
1876 KB |
Output is correct |
17 |
Correct |
2 ms |
1876 KB |
Output is correct |
18 |
Correct |
2 ms |
1876 KB |
Output is correct |
19 |
Correct |
2 ms |
1876 KB |
Output is correct |
20 |
Correct |
2 ms |
1876 KB |
Output is correct |
21 |
Correct |
2 ms |
1876 KB |
Output is correct |
22 |
Correct |
2 ms |
1876 KB |
Output is correct |
23 |
Correct |
2 ms |
1876 KB |
Output is correct |
24 |
Correct |
2 ms |
1876 KB |
Output is correct |
25 |
Correct |
2 ms |
1876 KB |
Output is correct |
26 |
Correct |
2 ms |
1876 KB |
Output is correct |
27 |
Correct |
2 ms |
1876 KB |
Output is correct |
28 |
Correct |
2 ms |
1876 KB |
Output is correct |
29 |
Correct |
3 ms |
1876 KB |
Output is correct |
30 |
Correct |
3 ms |
1876 KB |
Output is correct |
31 |
Correct |
3 ms |
1876 KB |
Output is correct |
32 |
Correct |
3 ms |
1920 KB |
Output is correct |
33 |
Correct |
2 ms |
1876 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
1876 KB |
Output is correct |
2 |
Correct |
2 ms |
1876 KB |
Output is correct |
3 |
Correct |
1 ms |
1876 KB |
Output is correct |
4 |
Correct |
1 ms |
1876 KB |
Output is correct |
5 |
Correct |
2 ms |
1876 KB |
Output is correct |
6 |
Correct |
1 ms |
1876 KB |
Output is correct |
7 |
Correct |
1 ms |
1876 KB |
Output is correct |
8 |
Correct |
2 ms |
1876 KB |
Output is correct |
9 |
Correct |
1 ms |
1876 KB |
Output is correct |
10 |
Correct |
1 ms |
1876 KB |
Output is correct |
11 |
Correct |
1 ms |
1876 KB |
Output is correct |
12 |
Correct |
1 ms |
1876 KB |
Output is correct |
13 |
Correct |
1 ms |
1876 KB |
Output is correct |
14 |
Correct |
2 ms |
1876 KB |
Output is correct |
15 |
Correct |
2 ms |
1876 KB |
Output is correct |
16 |
Correct |
2 ms |
1876 KB |
Output is correct |
17 |
Correct |
2 ms |
1876 KB |
Output is correct |
18 |
Correct |
2 ms |
1876 KB |
Output is correct |
19 |
Correct |
2 ms |
1876 KB |
Output is correct |
20 |
Correct |
2 ms |
1876 KB |
Output is correct |
21 |
Correct |
2 ms |
1876 KB |
Output is correct |
22 |
Correct |
2 ms |
1876 KB |
Output is correct |
23 |
Correct |
2 ms |
1876 KB |
Output is correct |
24 |
Correct |
2 ms |
1876 KB |
Output is correct |
25 |
Correct |
2 ms |
1876 KB |
Output is correct |
26 |
Correct |
2 ms |
1876 KB |
Output is correct |
27 |
Correct |
2 ms |
1876 KB |
Output is correct |
28 |
Correct |
2 ms |
1876 KB |
Output is correct |
29 |
Correct |
3 ms |
1876 KB |
Output is correct |
30 |
Correct |
3 ms |
1876 KB |
Output is correct |
31 |
Correct |
3 ms |
1876 KB |
Output is correct |
32 |
Correct |
3 ms |
1920 KB |
Output is correct |
33 |
Correct |
2 ms |
1876 KB |
Output is correct |
34 |
Correct |
5 ms |
1876 KB |
Output is correct |
35 |
Correct |
5 ms |
1876 KB |
Output is correct |
36 |
Correct |
5 ms |
1876 KB |
Output is correct |
37 |
Correct |
4 ms |
1876 KB |
Output is correct |
38 |
Correct |
4 ms |
1876 KB |
Output is correct |
39 |
Correct |
4 ms |
1876 KB |
Output is correct |
40 |
Correct |
4 ms |
1876 KB |
Output is correct |
41 |
Correct |
4 ms |
1876 KB |
Output is correct |
42 |
Correct |
4 ms |
1876 KB |
Output is correct |
43 |
Correct |
4 ms |
1876 KB |
Output is correct |
44 |
Correct |
4 ms |
1964 KB |
Output is correct |
45 |
Correct |
4 ms |
1876 KB |
Output is correct |
46 |
Correct |
4 ms |
1876 KB |
Output is correct |
47 |
Correct |
4 ms |
1876 KB |
Output is correct |
48 |
Correct |
4 ms |
1876 KB |
Output is correct |
49 |
Correct |
5 ms |
1876 KB |
Output is correct |
50 |
Correct |
4 ms |
1876 KB |
Output is correct |
51 |
Correct |
5 ms |
1876 KB |
Output is correct |
52 |
Correct |
5 ms |
1876 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
1876 KB |
Output is correct |
2 |
Correct |
2 ms |
1876 KB |
Output is correct |
3 |
Correct |
1 ms |
1876 KB |
Output is correct |
4 |
Correct |
1 ms |
1876 KB |
Output is correct |
5 |
Correct |
2 ms |
1876 KB |
Output is correct |
6 |
Correct |
1 ms |
1876 KB |
Output is correct |
7 |
Correct |
1 ms |
1876 KB |
Output is correct |
8 |
Correct |
2 ms |
1876 KB |
Output is correct |
9 |
Correct |
1 ms |
1876 KB |
Output is correct |
10 |
Correct |
1 ms |
1876 KB |
Output is correct |
11 |
Correct |
1 ms |
1876 KB |
Output is correct |
12 |
Correct |
1 ms |
1876 KB |
Output is correct |
13 |
Correct |
1 ms |
1876 KB |
Output is correct |
14 |
Correct |
2 ms |
1876 KB |
Output is correct |
15 |
Correct |
2 ms |
1876 KB |
Output is correct |
16 |
Correct |
2 ms |
1876 KB |
Output is correct |
17 |
Correct |
2 ms |
1876 KB |
Output is correct |
18 |
Correct |
2 ms |
1876 KB |
Output is correct |
19 |
Correct |
2 ms |
1876 KB |
Output is correct |
20 |
Correct |
2 ms |
1876 KB |
Output is correct |
21 |
Correct |
2 ms |
1876 KB |
Output is correct |
22 |
Correct |
2 ms |
1876 KB |
Output is correct |
23 |
Correct |
2 ms |
1876 KB |
Output is correct |
24 |
Correct |
2 ms |
1876 KB |
Output is correct |
25 |
Correct |
2 ms |
1876 KB |
Output is correct |
26 |
Correct |
2 ms |
1876 KB |
Output is correct |
27 |
Correct |
2 ms |
1876 KB |
Output is correct |
28 |
Correct |
2 ms |
1876 KB |
Output is correct |
29 |
Correct |
3 ms |
1876 KB |
Output is correct |
30 |
Correct |
3 ms |
1876 KB |
Output is correct |
31 |
Correct |
3 ms |
1876 KB |
Output is correct |
32 |
Correct |
3 ms |
1920 KB |
Output is correct |
33 |
Correct |
2 ms |
1876 KB |
Output is correct |
34 |
Correct |
5 ms |
1876 KB |
Output is correct |
35 |
Correct |
5 ms |
1876 KB |
Output is correct |
36 |
Correct |
5 ms |
1876 KB |
Output is correct |
37 |
Correct |
4 ms |
1876 KB |
Output is correct |
38 |
Correct |
4 ms |
1876 KB |
Output is correct |
39 |
Correct |
4 ms |
1876 KB |
Output is correct |
40 |
Correct |
4 ms |
1876 KB |
Output is correct |
41 |
Correct |
4 ms |
1876 KB |
Output is correct |
42 |
Correct |
4 ms |
1876 KB |
Output is correct |
43 |
Correct |
4 ms |
1876 KB |
Output is correct |
44 |
Correct |
4 ms |
1964 KB |
Output is correct |
45 |
Correct |
4 ms |
1876 KB |
Output is correct |
46 |
Correct |
4 ms |
1876 KB |
Output is correct |
47 |
Correct |
4 ms |
1876 KB |
Output is correct |
48 |
Correct |
4 ms |
1876 KB |
Output is correct |
49 |
Correct |
5 ms |
1876 KB |
Output is correct |
50 |
Correct |
4 ms |
1876 KB |
Output is correct |
51 |
Correct |
5 ms |
1876 KB |
Output is correct |
52 |
Correct |
5 ms |
1876 KB |
Output is correct |
53 |
Correct |
382 ms |
7388 KB |
Output is correct |
54 |
Correct |
419 ms |
7120 KB |
Output is correct |
55 |
Correct |
428 ms |
7132 KB |
Output is correct |
56 |
Correct |
399 ms |
7132 KB |
Output is correct |
57 |
Correct |
322 ms |
7108 KB |
Output is correct |
58 |
Correct |
350 ms |
7108 KB |
Output is correct |
59 |
Correct |
345 ms |
6900 KB |
Output is correct |
60 |
Correct |
348 ms |
7180 KB |
Output is correct |
61 |
Correct |
338 ms |
7216 KB |
Output is correct |
62 |
Correct |
336 ms |
7260 KB |
Output is correct |
63 |
Correct |
343 ms |
7208 KB |
Output is correct |
64 |
Correct |
348 ms |
6884 KB |
Output is correct |
65 |
Correct |
362 ms |
6952 KB |
Output is correct |
66 |
Correct |
343 ms |
6756 KB |
Output is correct |
67 |
Correct |
373 ms |
6884 KB |
Output is correct |
68 |
Correct |
343 ms |
6632 KB |
Output is correct |
69 |
Correct |
338 ms |
7092 KB |
Output is correct |
70 |
Correct |
296 ms |
6664 KB |
Output is correct |
71 |
Correct |
355 ms |
7140 KB |
Output is correct |
72 |
Correct |
348 ms |
7120 KB |
Output is correct |
73 |
Correct |
381 ms |
7388 KB |
Output is correct |