2017da2.cpp

#include<stdio.h>
int main(void)
{
int n,m,i,j,min;
min = -1;
int a[1000]={0};

scanf("%d",&n);
scanf("%d",&m);

while(n!=0 && m!=0){
	min = -1;
	for(i=0;i<n;i++){
		scanf("%d",&a[i]);
	}
	for(i=0;i<n-1;i++){
		for(j=n-1;j>i;j--){
			if(m>=a[i]+a[j]){
				if(min<a[i]+a[j]){
					min=a[i]+a[j];
				}
			}
		}
	}
	
	if(min==-1){
		printf("NONE\n");
	}else{
		printf("%d\n",min);
	}
	
	scanf("%d%d",&n,&m);
}

return 0;
}