求助刚才的入门赛H

#include<bits/stdc++.h>
#include<iostream>
#include<queue>
#include<stack>
#include<stdio.h>
#include<math.h>
#define int long long
using namespace std;
int ans[10050];
signed main()
{
	ios_base::sync_with_stdio(false);
	cout.tie(0);
	cin.tie(0);
	int n,m;
	cin>>n>>m;
	for(int i=1;i<=n;i++){
		int a,b,c;
		char u;
		scanf("%lldx%c%lld=%lld",&a,&u,&b,&c);
		int x;
		if(u=='-') x=(c+b)/a;
		else x=(c-b)/a;
		ans[i]=x;
	}
	sort(ans+1,ans+n+1);
	int mm=unique(ans+1,ans+n+1)-ans;
	n=mm-1;
	for(int i=1;i<=m;i++){
		int l,r;
		cin>>l>>r;
		int xll=1,xrr=1;
		for(int i=1;i<=n;i++){
			xll=i;
			if(ans[i]>=l) break;
		}
		for(int i=n;i>=1;i--){
			xrr=i;
			if(ans[i]<=r) break;
		}
		if(ans[xll]>=l&&ans[xrr]<=r) cout<<xrr-xll+1;
		else cout<<0;
		if(i!=m) cout<<"\n";
	}
	return 0;
}
//1 3 6
//4 5