#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],nxt[N];
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)
{
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()
{
int g1=grp(n/2),g2=grp(n/2+1);
if(g1!=g2)return;
int rl=qry(g1);
int st=at[g1];
int md=n/2-rl+at[g1];
int ed=at[g1]+sz[g1];
for(int j=md;j<ed;j=nxt[j])add(a[j],nxt[j]-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;
{
static int s[N];int so=0;
for(int i=1;i<=n;++i)
{
while(so&&a[i]>a[s[so]])nxt[s[so--]]=i;
s[++so]=i;
}
while(so)nxt[s[so--]]=n+1;
for(int i=1;i<=n;i=nxt[i])add(a[i],nxt[i]-i);
}
for(int i=0;i<=n;++i)eh[i]=(int*)malloc(2*sizeof**eh);
for(int t,p,i=0;i<q;++i)
{
scanf("%d%d",&t,&p);
if(t>n)t=n;
append(t,i),append(t,p);
}
for(int i=0;i<=n;++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();
}
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:23:18: warning: suggest parentheses around '-' in operand of '&' [-Wparentheses]
23 | 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:32:9: warning: unused variable 'st' [-Wunused-variable]
32 | int st=at[g1];
| ^~
Main.cpp: In function 'int main()':
Main.cpp:42:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
42 | scanf("%d%d",&n,&q);
| ~~~~~^~~~~~~~~~~~~~
Main.cpp:43:31: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
43 | for(int i=1;i<=n;++i)scanf("%d",a+i),at[a[i]]=i;
| ~~~~~^~~~~~~~~~
Main.cpp:60:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
60 | scanf("%d%d",&t,&p);
| ~~~~~^~~~~~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
266 ms |
22356 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
338 ms |
29880 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
59 ms |
12112 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
266 ms |
22356 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
