This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include <stdio.h>
#include <stdlib.h>
#include <assert.h>
#include <cstdio>
#include <algorithm>
#include <vector>
using namespace std;
struct RMQ{
vector<int> tree;
int sz;
void init(int n){
for(sz=1;sz<n;sz<<=1);
tree.resize(2*sz+1);
}
void update(int x,int c){
x+=sz;
tree[x]=c;
x>>=1;
while(x){
tree[x]=max(tree[x*2],tree[x*2+1]);
x>>=1;
}
}
int query(int L,int R){
L+=sz,R+=sz;
int ret=0;
while(L<R){
if(L&1)ret=max(ret,tree[L++]);
if(~R&1)ret=max(ret,tree[R--]);
L>>=1,R>>=1;
}
if(L==R)ret=max(ret,tree[L]);
return ret;
}
}rmq;
struct BIT{
vector<int> tree;
int sz;
void init(int n){
for(sz=1;sz<n;sz<<=1);
tree.resize(sz+1);
}
void add(int x,int c){
x++;
while(x<=sz){
tree[x]+=c;
x+=x&-x;
}
}
int sum(int x){
if(x<0)return 0;
x++;
int ret=0;
while(x){
ret+=tree[x];
x-=x&-x;
}
return ret;
}
int query(int x){
if(x<0)return -1;
x++;
int p=0;
for(int i=sz/2;i;i>>=1){
if(tree[p+i]<x){
x-=tree[p+i];
p+=i;
}
}
return p;
}
}bit;
int nxt[100010];
bool chk[100010];
int find(int x){
return nxt[x]=(nxt[x]==x?x:find(nxt[x]));
}
int a[100010];
int GetBestPosition(int N, int C, int M, int *K, int *S, int *E){
rmq.init(N);
bit.init(N);
for(int i=0;i<N-1;i++){
rmq.update(i,K[i]);
bit.add(i,1);
nxt[i]=i;
}
bit.add(N-1,1);
nxt[N-1]=N-1;
for(int i=0;i<C;i++){
int L=bit.query(S[i]-1)+1;
int R=bit.query(E[i])-1;
R=min(R,max(0,N-2));
if(rmq.query(L,R)<M){
a[L]++;
a[R+1]--;
}
for(int i=L;i<=R;i++){
i=find(i);
if(i>R)continue;
bit.add(i,-1);
nxt[i]=i+1;
}
}
int ans=0,Max=0;
for(int i=0;i<N-1;i++){
if(i)a[i]+=a[i-1];
if(Max<a[i]){
Max=a[i];
ans=i;
}
}
return ans;
}
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