#include<bits/stdc++.h>
#define rep(a,b,c) for(int c(a);c<=(b);++c)
#define drep(a,b,c) for(int c(a);c>=(b);--c)
using namespace std;
inline int read()
{
	int res=0;char ch=getchar();bool f=0;while(ch<'0'||ch>'9')f^=(ch=='-'),ch=getchar();
	while(ch<='9'&&ch>='0')res=res*10+(ch^48),ch=getchar();return f?-res:res;
}
typedef long long ll;
int n;
const int N=4e5+10;int a[N];ll K;int S;
unsigned seed=998244353; 
unsigned rnd()
{
	seed^=seed<<19;
	seed^=seed>>13;
	seed^=seed<<7;
	return seed;
}
struct Node
{
	int l,r,siz,val;ll sm;unsigned key;
}t[N];int Rt,T1,T2,T3,T4,T5,cnt;
inline void update(int x)
{
	t[x].sm=t[t[x].l].sm+t[t[x].r].sm+t[x].val;
	t[x].siz=t[t[x].l].siz+t[t[x].r].siz+1;
}
inline void split(int cur,int k,int &x,int &y)
{
	if(!cur){x=y=0;return;}
	if(t[cur].val<=k){x=cur;split(t[cur].r,k,t[x].r,y);update(x);}
	else{y=cur;split(t[cur].l,k,x,t[cur].l);update(y);}
}
inline int merge(int x,int y)
{
	if(!x||!y)return x|y;
	if(t[x].key<t[y].key){t[x].r=merge(t[x].r,y);update(x);return x;}
	t[y].l=merge(x,t[y].l);update(y);return y;
}
inline void Split(int cur,ll k,int &x,int &y)
{
	if(!cur){x=y=0;return;}
	if(t[t[cur].l].sm+t[cur].val<=k)
	{
		x=cur;Split(t[cur].r,k-t[t[cur].l].sm-t[t[cur].l].val,t[cur].r,y);
		update(x);
	}
	else
	{
		y=cur;Split(t[cur].l,k,x,t[cur].l);
		update(y);
	}
}
inline int Node(int v)
{
	t[++cnt].val=v;t[cnt].siz=1;
	t[cnt].sm=v;t[cnt].key=rnd();
	return cnt;
}
inline void ins(int k)
{
	split(Rt,k,T1,T2);
	Rt=merge(merge(T1,Node(k)),T2);
}
inline void del(int k)
{
	split(Rt,k,T1,T3);
	split(T1,k-1,T1,T2);
	T2=merge(t[T2].l,t[T2].r);
	Rt=merge(merge(T1,T2),T3);
}
int main()
{
	n=read();int Q=read();
	rep(1,n,i)
	{
		a[i]=read();
		if(a[i]==0)continue;
		if(a[i]<0)
		{
			K-=a[i];
		}
		else
		{
			ins(a[i]);
			++S;
		}
	}
	while(Q--)
	{
		int i=read(),x=read();
		if(a[i]<0)
		{
			K+=a[i];
		}
		else if(a[i]>0)
		{
			del(a[i]);
			--S;
		}
		a[i]=x;
		if(a[i]<0)
		{
			K-=a[i];
		}
		else if(a[i]>0)
		{
			ins(a[i]);
			++S;
		}
		Split(Rt,K,T1,T2);
		int T=t[T2].siz;
		Rt=merge(T1,T2);
		printf("%d\n",S-T+1);
	}
}
/*
3 5
1 2 3
3 4
2 -2
1 -3
3 1
2 1
*/