oj.uz

Submission #751839

# Submission time Handle Problem Language Result Execution time Memory
751839 2023-06-01T15:08:05 Z 1075508020060209tc Sequence (APIO23_sequence) C++17
0 / 100
 2000 ms 10436 KB 
#include <bits/stdc++.h>
using namespace std;
#define ll long long
int lowbit(int x){return x&-x;}

struct BIT{
vector<int>bit;
int MX;
void init(int len){
for(int i=0;i<=len+100;i++){
    bit.push_back(0);
}
MX=len;
}
void upd(int pl,int vl){
while(pl<=MX){
    bit[pl]+=vl;
    pl+=lowbit(pl);
}
}
int qsum(int pl){
int ret=0;
while(pl){
    ret+=bit[pl];
    pl-=lowbit(pl);
}
return ret;
}
int k_th(int k){

    int l=0;int r=MX;
    while(l<r){
        int mi=l+(r-l+1)/2;
        if(qsum(mi)<k){
            l=mi;
        }else{
            r=mi-1;
        }
    }
    return l+1;






int lg=__lg(MX);
int cnt=0;
int nw=0;
for(int i=lg;i>=0;i--){
    if(cnt+bit[nw+(1<<i)]<k){
        nw+=(1<<i);
        cnt+=bit[nw];
    }
}
return nw+1;
}
};


int n;
int ar[500005];
int freq[500005];

int slv(){
   int ans=0;
   BIT num;
   num.init((1<<(__lg(n)+1)));
    for(int l=1;l<=n;l++){
        for(int r=l;r<=n;r++){
            freq[ar[r]]++;
            num.upd(ar[r],1);
            int len=r-l+1;
            ans=max(ans,freq[num.k_th((len+1)/2)]);
            ans=max(ans,freq[num.k_th((len+2)/2)]);
        }
        for(int r=1;r<=n;r++){
            freq[ar[r]]--;
            num.upd(ar[r],-1);
        }
    }
    return ans;
}


int sequence(int N, std::vector<int> A) {
    n=N;
    for(int i=0;i<n;i++){
        ar[i+1]=A[i];
    }
return slv();

  return 0;
}

/*

signed main()
{
    cin>>n;
    for(int i=1;i<=n;i++){
        cin>>ar[i];
    }
    cout<<slv();


    return 0;
}

*/

Subtask #1
0.0 / 11.0

# Verdict Execution time Memory 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 Incorrect 1 ms 212 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #2
0.0 / 17.0

# Verdict Execution time Memory 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 Incorrect 1 ms 212 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #3
0.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Execution timed out 2067 ms 10304 KB Time limit exceeded
3 Halted 0 ms 0 KB -

Subtask #4
0.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Execution timed out 2045 ms 10300 KB Time limit exceeded
3 Halted 0 ms 0 KB -

Subtask #5
0.0 / 13.0

# Verdict Execution time Memory Grader output
1 Execution timed out 2062 ms 10436 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #6
0.0 / 22.0

# Verdict Execution time Memory 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 Incorrect 1 ms 212 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #7
0.0 / 18.0

# Verdict Execution time Memory 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 Incorrect 1 ms 212 KB Output isn't correct
5 Halted 0 ms 0 KB -