因为set的指针不太会写，所以写了个map但是没有过有人能帮我调一下吗？玄3关。题目

#include<bits/stdc++.h>
#define ll long long
using namespace std;
const ll Mod=998244353;
map<ll,ll>::iterator iter;
map<ll,ll>mp,mp2;
int n,m,k,u,v,sum;
int main()
{
	cin>>n>>m>>k;
	for(int i=1,x;i<=n;i++)
		cin>>x,mp[x]++;
	while(m--)
	{
        mp2.clear();
		int x,y;
		cin>>x>>y;
		if(x<0)
		{
            for(iter=mp.end();iter!=mp.begin();iter--)
            {
                u=iter->first,v=iter->second;
				if(u>(-x))
                    mp2[u+x]=v;
            }
            mp=mp2;
		}
		else if(x>0)
		{
            for(iter=mp.begin();iter!=mp.end();iter++)
            {
                u=iter->first,v=iter->second;
				if(u+x<=k)
                    mp2[u+x]=v;
                else mp2[k]+=v,mp2[1]+=v*(u+x-k);
            }
            mp=mp2;
		}
		sum=0;
		if(y!=0) mp[y]++;
        for(iter=mp.begin();iter!=mp.end();iter++)
            sum=(sum+(iter->first)*(iter->second))%Mod;
        cout<<sum<<endl;
	}
    return 0;
}