#include<bits/stdc++.h>
using namespace std;
int a[17]={45,34,63,84,54,33,53,42,93,75,64,23,86,65,72,41,76};
int k;
int main(){
    cin>>k;
    for(int i=0;i<17;i++){
    	if(a[i]%10==k){
    		cout<<a[i]<<" ";
		}
	} 
}

放一个数组就可以复制粘贴了。

#include<bits/stdc++.h>
#define int long long
#define INF 0x3f3f3f
using namespace std;
int n,ans,a[200]={45,34,63,84,54,33,53,42,93,75,64,23,86,65,72,41,76};
signed main(){
	cin>>n;
	for(int i=0;i<=50;i++)
		if(a[i]%10==n)cout<<a[i]<<" ";
	return 0;
}