이 제출은 이전 버전의 oj.uz에서 채점하였습니다. 현재는 제출 당시와는 다른 서버에서 채점을 하기 때문에, 다시 제출하면 결과가 달라질 수도 있습니다.
#include<bits/stdc++.h>
using namespace std;
int a,b,c,d,e,i,j,ii,jj,zx,xc,f[300009],dp[300009],D,pas,seg[1200009],SEG[1200009],seg2[1200009],za,l,r,z,zz,F[300009];
int se[1200009],se2[1200009];
pair <int, int> p[300009];
void pushdown(int q, int w, int rr){
if(q!=w){
seg2[rr*2]+=seg2[rr];
seg2[rr*2+1]+=seg2[rr];
}
seg[rr]+=seg2[rr];seg2[rr]=0;
}
void upd(int q, int w, int rr){
pushdown(q,w,rr);
if(q>r||w<l) return;
if(q>=l&&w<=r){
seg2[rr]+=z;
pushdown(q,w,rr);
return;
}
upd(q,(q+w)/2,rr*2);
upd((q+w)/2+1,w,rr*2+1);
if(seg[rr*2+1]>=seg[rr*2]){
seg[rr]=seg[rr*2+1];SEG[rr]=SEG[rr*2+1];
}else{
seg[rr]=seg[rr*2];SEG[rr]=SEG[rr*2];
}
}
void read(int q, int w, int rr){
pushdown(q,w,rr);
if(q>r||w<l) return;
if(q>=l&&w<=r){
if(z<seg[rr]){
z=seg[rr];zz=SEG[rr];
}else{
if(z==seg[rr]){
zz=max(zz,SEG[rr]);
}
}
return;
}
read(q,(q+w)/2,rr*2);
read((q+w)/2+1,w,rr*2+1);
}
void UPD(int rr){
if(rr==0) return;
se[rr]=max(se[rr*2],se[rr*2+1]);
UPD(rr/2);
}
void READ(int q, int w, int rr){
if(q>r||w<l) return;
if(q>=l&&w<=r){
z=max(z,se[rr]);
return;
}
READ(q,(q+w)/2,rr*2);
READ((q+w)/2+1,w,rr*2+1);
}
int main(){
ios_base::sync_with_stdio(false),cin.tie(0),cout.tie(0);
cin>>a>>D;
for(i=1; i<=a; i++){
cin>>f[i];
}
za=1;
while(za<a) za*=2;
for(i=1; i<=a; i++){
p[i].first=f[i];p[i].second=-i;
}
sort(p+1,p+a+1);
//
for(i=1; i<=a; i++){
seg[za+i-1]=0;SEG[za+i-1]=i;
}
for(i=1; i<=a; i++){
l=max(i-D+1,1);r=i;z=1;
upd(1,za,1);
}
for(ii=1; ii<=a; ii++){
i=-p[ii].second;
if(i>D){
l=1;r=i-D;z=0;zz=0;
read(1,za,1);
if(z!=D){
F[i]=1;
}else{
F[i]=zz;
}
}else{
F[i]=1;
}
l=max(i-D+1,1);r=i;z=-1;
upd(1,za,1);
}
//
for(ii=1; ii<=a; ii++){
i=-p[ii].second;
l=F[i];r=i-1;z=0;
READ(1,za,1);
dp[i]=z+1;
se[za+i-1]=dp[i];
UPD((za+i-1)/2);
}
for(i=1; i<=a; i++){
pas=max(pas,dp[i]);
}
/*for(i=1; i<=a; i++){
cout<<dp[i]<<" ";
}
cout<<"\n";*/
cout<<pas;
return 0;
}
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