oj.uz

Submission #957868

# Submission time Handle Problem Language Result Execution time Memory
957868 2024-04-04T12:31:21 Z vjudge1 Abracadabra (CEOI22_abracadabra) C++17
25 / 100
 3000 ms 20816 KB 
#include<stdio.h>
#include<stdlib.h>

#define N 200004
int n,a[N],t[N],q,sz[N],at[N],*eh[N],eo[N],zz[1000005];

void upd(int p,int k) { for(;p<N;p|=p+1)t[p]+=k; }
int qry(int p) {int z=0;for(;p>0;p&=p-1)z+=t[p-1];return z;}

void add(int p,int k) { sz[p]=k; upd(p,k); }
void rem(int p) { upd(p,-sz[p]); }

int grp(int x)
{
    if(x<=0)return -1;
    int p=0,v=0;
    for(int j=1<<19;j>0;j>>=1) if(p+j<=N&&v+t[p+j-1]<x)p+=j,v+=t[p-1];
    return p;
}

void append(int i,int j)
{
    int o=eo[i]++;
    if(o>=2&&(o&o-1)==0)eh[i]=(int*)realloc(eh[i],2*o*sizeof**eh);
    eh[i][o]=j;
}

void shuffle()
{
    static int done=0;
    if(done)return;
    int g1=grp(n/2),g2=grp(n/2+1);
    if(g1!=g2){done=1;return;}
    int rl=qry(g1);
    int st=at[g1];
    int md=n/2-rl+at[g1];
    int ed=at[g1]+sz[g1];
    for(int l=md,j=md;j<=ed;++j) if(j==ed||a[j]>a[l])add(a[l],j-l),l=j;
    rem(g1);
    add(g1,n/2-rl);
}

int main()
{
    scanf("%d%d",&n,&q);
    for(int i=1;i<=n;++i)scanf("%d",a+i),at[a[i]]=i;
    for(int l=1,i=1;i<=n+1;++i) if(i==n+1||a[i]>a[l]) add(a[l],i-l),l=i;

    for(int i=0;i<=n+1;++i)eh[i]=(int*)realloc(0,2*sizeof**eh);

    for(int t,p,i=0;i<q;++i)
    {
        scanf("%d%d",&t,&p);
        if(t>n+1)t=n+1;
        append(t,i),append(t,p);
    }

    for(int i=0;i<=n+1;++i)
    {
        for(int j=0;j<eo[i];j+=2)
        {
            int gg=grp(eh[i][j+1]);
            int idx=eh[i][j+1]-qry(gg);
            zz[eh[i][j]]=a[at[gg]+idx-1];
        }
        shuffle();
    }

    if(q<=100000)
    for(int i=0;i<q;++i)printf("%d\n",zz[i]);

    return 0;
}

Compilation message

Main.cpp: In function 'void append(int, int)':
Main.cpp:24:18: warning: suggest parentheses around '-' in operand of '&' [-Wparentheses]
   24 |     if(o>=2&&(o&o-1)==0)eh[i]=(int*)realloc(eh[i],2*o*sizeof**eh);
      |                 ~^~
Main.cpp: In function 'void shuffle()':
Main.cpp:35:9: warning: unused variable 'st' [-Wunused-variable]
   35 |     int st=at[g1];
      |         ^~
Main.cpp: In function 'int main()':
Main.cpp:45:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   45 |     scanf("%d%d",&n,&q);
      |     ~~~~~^~~~~~~~~~~~~~
Main.cpp:46:31: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   46 |     for(int i=1;i<=n;++i)scanf("%d",a+i),at[a[i]]=i;
      |                          ~~~~~^~~~~~~~~~
Main.cpp:53:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   53 |         scanf("%d%d",&t,&p);
      |         ~~~~~^~~~~~~~~~~~~~

Subtask #1
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 222 ms 20144 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
0 / 40.0

# Verdict Execution time Memory Grader output
1 Execution timed out 3017 ms 20816 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #3
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 850 ms 10952 KB Output is correct
2 Correct 54 ms 11440 KB Output is correct
3 Correct 859 ms 11140 KB Output is correct
4 Correct 50 ms 11600 KB Output is correct
5 Correct 54 ms 11248 KB Output is correct
6 Correct 48 ms 11348 KB Output is correct
7 Correct 54 ms 11344 KB Output is correct
8 Correct 46 ms 11296 KB Output is correct
9 Correct 55 ms 11348 KB Output is correct
10 Correct 44 ms 11732 KB Output is correct
11 Correct 50 ms 11956 KB Output is correct
12 Correct 39 ms 11860 KB Output is correct
13 Correct 43 ms 11580 KB Output is correct
14 Correct 41 ms 11824 KB Output is correct
15 Correct 38 ms 11604 KB Output is correct
16 Correct 21 ms 9668 KB Output is correct
17 Correct 42 ms 11344 KB Output is correct
18 Correct 39 ms 11224 KB Output is correct
19 Correct 1 ms 6488 KB Output is correct
20 Correct 1 ms 6492 KB Output is correct

Subtask #4
0 / 25.0

# Verdict Execution time Memory Grader output
1 Incorrect 222 ms 20144 KB Output isn't correct
2 Halted 0 ms 0 KB -