week14- C. Score Distribution 2, Author Solution

#include<bits/stdc++.h>
int N,p[200001];
int main(){
    int x,y;
    scanf("%d%d",&x,&y);
    N=x;
    if(y*2+1>N)puts("Impossible");
    else{
        printf("%d\n",N);
        for(int i=1;i<=(N+1)/2;i++)printf("%d ",y);
        for(int i=(N+1)/2+1;i<=N;i++)printf("%d%c",y+1," \n"[i==N]);
    }
    return 0;
}