oj.uz

Submission #683822

# Submission time Handle Problem Language Result Execution time Memory
683822 2023-01-19T12:13:33 Z Fysty Monochrome Points (JOI20_monochrome) C++17
35 / 100
 378 ms 5724 KB 
#include <bits/stdc++.h>
using namespace std;
#pragma GCC optimize("Ofast")
#pragma GCC optimize ("unroll-loops")
typedef long long ll;
typedef pair<int,int> pii;
typedef pair<ll,ll> pll;
#define MottoHayaku ios::sync_with_stdio(false);cin.tie(0);
#define rep(i,n) for(int i=0;i<n;i++)
#define rep1(i,n) for(int i=1;i<=n;i++)
#define F first
#define S second
#define pb push_back

mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());

const int N=4e5+5;
struct BIT
{
    int a[N];
    void init()
    {
        rep1(i,N-1) a[i]=0;
    }
    void upd(int x,int val)
    {
        for(;x<N;x+=x&-x) a[x]+=val;
    }
    int qry(int x)
    {
        int ret=0;
        for(;x;x-=x&-x) ret+=a[x];
        return ret;
    }
} bit;
int n,to[N];
vector<int> a,b;
string s;
int getans(int i)
{
    i=(i%n+n)%n;
    rep(j,n)
    {
        to[a[j]]=b[(j+i)%n];
        to[b[(j+i)%n]]=a[j];
    }
    bit.init();
    int tot=0;
    rep1(j,n*2)
    {
        if(to[j]<j) bit.upd(j,-1);
        else
        {
            tot+=bit.qry(to[j]);
            bit.upd(to[j],1);
        }
    }
    return tot;
}
signed main()
{
    MottoHayaku
    cin>>n>>s;
    //rep(i,n) s+="BW";
    //shuffle(s.begin(),s.end(),rng);
    //cout<<n<<"\n"<<s<<"\n";
    rep(i,n*2)
    {
        if(s[i]=='B') a.pb(i+1);
        else b.pb(i+1);
    }
    int l=0;
    int r=l+n-1;
    while(l<r)
    {
        int mid=l+r+1>>1;
        int x=getans(mid)-getans(mid-1);
        if(x>0) l=mid;
        else r=mid-1;
    }
    cout<<getans(l)<<"\n";
}

Compilation message

monochrome.cpp: In function 'int main()':
monochrome.cpp:76:20: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   76 |         int mid=l+r+1>>1;
      |                 ~~~^~

Subtask #1
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 1876 KB Output is correct
2 Correct 1 ms 1876 KB Output is correct
3 Correct 1 ms 1876 KB Output is correct
4 Correct 2 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 1 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

Subtask #2
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 1876 KB Output is correct
2 Correct 1 ms 1876 KB Output is correct
3 Correct 1 ms 1876 KB Output is correct
4 Correct 2 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 1 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 3 ms 1936 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 3 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 2 ms 1876 KB Output is correct
30 Correct 2 ms 1876 KB Output is correct
31 Correct 2 ms 1876 KB Output is correct
32 Correct 2 ms 1876 KB Output is correct
33 Correct 2 ms 1876 KB Output is correct

Subtask #3
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 1876 KB Output is correct
2 Correct 1 ms 1876 KB Output is correct
3 Correct 1 ms 1876 KB Output is correct
4 Correct 2 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 1 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 3 ms 1936 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 3 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 2 ms 1876 KB Output is correct
30 Correct 2 ms 1876 KB Output is correct
31 Correct 2 ms 1876 KB Output is correct
32 Correct 2 ms 1876 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 1944 KB Output is correct
38 Correct 5 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 5 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 5 ms 1876 KB Output is correct
45 Correct 5 ms 1876 KB Output is correct
46 Correct 5 ms 1944 KB Output is correct
47 Correct 5 ms 1928 KB Output is correct
48 Correct 5 ms 1876 KB Output is correct
49 Correct 4 ms 1876 KB Output is correct
50 Correct 4 ms 1876 KB Output is correct
51 Correct 4 ms 1876 KB Output is correct
52 Correct 4 ms 1876 KB Output is correct

Subtask #4
0.0 / 65.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 1876 KB Output is correct
2 Correct 1 ms 1876 KB Output is correct
3 Correct 1 ms 1876 KB Output is correct
4 Correct 2 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 1 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 3 ms 1936 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 3 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 2 ms 1876 KB Output is correct
30 Correct 2 ms 1876 KB Output is correct
31 Correct 2 ms 1876 KB Output is correct
32 Correct 2 ms 1876 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 1944 KB Output is correct
38 Correct 5 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 5 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 5 ms 1876 KB Output is correct
45 Correct 5 ms 1876 KB Output is correct
46 Correct 5 ms 1944 KB Output is correct
47 Correct 5 ms 1928 KB Output is correct
48 Correct 5 ms 1876 KB Output is correct
49 Correct 4 ms 1876 KB Output is correct
50 Correct 4 ms 1876 KB Output is correct
51 Correct 4 ms 1876 KB Output is correct
52 Correct 4 ms 1876 KB Output is correct
53 Incorrect 378 ms 5724 KB Output isn't correct
54 Halted 0 ms 0 KB -