源代码如下，在自己的ide上答案都是对的，拿给洛谷就出现异常，求求大佬解答 >3

#include <iostream>
#include <algorithm>
#define fors(a,b) for(int i=a;i<b;i++)
int read();

const int N=2e5+10;
int arr[N]={};
int main(){ 
	int n=read(),c=read();
	int cnt=0;
	fors(0,n)arr[i]=read();
	int l=0,r=1;
	int tmpt=0;
	std::sort(arr,arr+n);
	while(r<=n){
		while(arr[r]-arr[l]<c){r++;tmpt=r;}
		while(arr[r]-arr[l]>c){
			r=tmpt;
			l++;
		}
		if(arr[r]-arr[l]==c){
			if(r+1<n) cnt++,r++;
			else cnt++,r=tmpt,l++;
		}	
	}
	printf("%d",cnt);
	
	
	
	
	return 0;
}


int read() {
  int num = 0;
  char c;
  bool tag = false;
  while ((c = getchar()) != '-' && c != '+' && (c < '0' || c > '9') && ~c);
  if (!~c)
    return EOF;
  if (c == '-')
    tag = true;
  else if (c == '+')
    tag = false;
  else
    num = c ^ 48;
  while ((c = getchar()) >= '0' && c <= '9')
    num = (num << 1) + (num << 3) + (c ^ 48);
  if (tag)
    return -num;
  return num;
}