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TLM一次,WA一次,附辣鸡代码#include<iostream>
#include<algorithm>
using namespace std;
int main(){
int n,s,cow[30000],res=0;
while(scanf("%d%d",&n,&s)!=EOF){
for(int i=0;i<n;i++){
cin>>cow[i];
}
sort(cow,cow+n);
for(int i=0;i<n-1;i++){
for(int j=i+1;j<n;j++){
if(cow[i]+cow[j]<s){
res++;
}else if(cow[i]+cow[j]==s){
res++;
}else{
break;
}
}
}
cout<<res<<endl;
res=0;
}
return 0;
}
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