用CPU换的

#include<cstdio>
#include<cstring>
#include<algorithm>
#include<cctype>
using namespace std;
const int N=1e6+10;
int T,n,a[N],w[N],q1[N],q2[N];
int read(){
int x=0,f=1;char c=getchar();
while(!isdigit(c)){if(c=='-')f=-f;c=getchar();}
while(isdigit(c)){x=(x<<1)+(x<<3)+c-'0';c=getchar();}
return x*f;
}
bool cmp(int x,int y)
{return (w[x]w[y])?x<y:w[x]<w[y];}
void solve(){
int h1=1,t1=n,h2=1,t2=0,v,p;T--;
for(int i=1;i<=n;i++)w[q1[n-i+1]=i]=a[i];
while(1){
if(t1-h1+1+t2-h2+12){printf("%d\n",1);return;}
if(t2-h2+1<=0||t1-h1+1>0&&cmp(q2[h2],q1[h1])){
v=w[p=q1[h1]];p=q1[h1];h1++;
if(t2-h2+1<=0||t1-h1+1>0&&cmp(q1[t1],q2[t2]))v-=w[q1[t1]],t1--;
else v-=w[q2[t2]],t2--;
}
else{
v=w[p=q2[h2]];h2++;
if(t2-h2+1<=0||t1-h1+1>0&&cmp(q1[t1],q2[t2]))v-=w[q1[t1]],t1--;
else v-=w[q2[t2]],t2--;
}
w[p]=v;
if((t2-h2+1<=0||cmp(p,q2[t2]))&&(t1-h1+1<=0||cmp(p,q1[t1])))
{q2[t2]=p;break;}
q2[t2]=p;
}
int cnt=0,f=t2-h2+1+t1-h1+1;
while(1){
cnt;
if(t1-h1+1+t2-h2+1==2){printf("%d\n",f+(cnt&1));return;}
if(t2-h2+1<=0||t1-h1+1>0&&cmp(q2[h2],q1[h1])){
v=w[p=q1[h1]];p=q1[h1];h1;
if(t2-h2+1<=0||t1-h1+1>0&&cmp(q1[t1],q2[t2]))v-=w[q1[t1]],t1--;
else v-=w[q2[t2]],t2--;
}
else{
v=w[p=q2[h2]];h2++;
if(t2-h2+1<=0||t1-h1+1>0&&cmp(q1[t1],q2[t2]))v-=w[q1[t1]],t1--;
else v-=w[q2[t2]],t2--;
}
w[p]=v;
if((t2-h2+1<=0||cmp(p,q2[t2]))&&(t1-h1+1<=0||cmp(p,q1[t1])))
{q2[t2]=p;continue;}
printf("%d\n",f+(cnt&1));return;
}
return;
}
int main()
{
T=read();n=read();
for(int i=1;i<=n;i)a[i]=read();
solve();
while(T){
int k=read();
while(k--){
int x=read(),w=read();
a[x]=w;
}
solve();
}
return 0;
}