排序+双指针实现

#include<iostream>
#include<cstring>
#include<cstdio>
#include<algorithm>

using namespace std;

const int N=1e5+10;

int num[N];

bool judge(int a,int b){

    int i=1,j=a;
    while(i<j){
        if(num[i]+num[j]>b){
            j--;
        }
        else if(num[i]+num[j]<b){
            i++;
        }
        else{
            cout<<num[i]<<" "<<num[j]<<endl;
            return true;
        }
    }
    return false;
}

int main(){
    int a,b;
    scanf("%d%d",&a,&b);

    for(int i=1;i<=a;i++){
        scanf("%d",&num[i]);
    }

    sort(num+1,num+a+1);

    if(!judge(a,b)) cout<<"No Solution"<<endl;

    return 0;
}