#include<stdio.h>
#include<stdlib.h>
#include<assert.h>
#include<stdbool.h>

int min(int a,int b){if(a<b){return a;}return b;}
int max(int a,int b){if(a>b){return a;}return b;}

int main(){
  int n,q,i,j,t,v,res=0,nr=0,st,fi;
  int *a=malloc(sizeof(int)*262144);
  scanf("%d",&n);
  assert(24<=n&&n<=200000);
  for(i=1;i<=n;i++){
    scanf("%d",&a[i]);
    assert(0<=a[i]&&a[i]<=153);
  }
  for(i=1;i<=n;i++){
    if(i>24){nr-=a[i-24];}
    nr+=a[i];
    res=max(res,nr);
  }
  scanf("%d",&q);
  assert(1<=q&&q<=200000);
  for(i=0;i<q;i++){
    scanf("%d%d",&t,&v);
    assert(1<=t&&t<=n);
    assert(a[t]<=v&&v<=153);
    a[t]=v;
    st=max(1,t-30);
    fi=min(n,t+30);
    nr=0;
    for(j=st;j<=fi;j++){
      if(j>=st+24){nr-=a[j-24];}
      nr+=a[j];
      res=max(res,nr);
    }
    printf("%d\n",res);
  }
  return 0;
}