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#include <iostream>
#include<fstream>
using namespace std;
ifstream f("scmax.in");
ofstream g("scmax.out");
int n,i,j,p[100000],nr=0;
long a[100000];
int main()
{
f>>n;
int dif=0;
for(i=1;i<=n;i++) f>>a[i];
if(a[1]>a[2]) {p[2]=1; j=2;}
else {p[1]=1; j=1;}
for(i=2;i<=n;i++) {
dif=dif+a[i]-j;
if(dif>0) {
// nr++;
j=a[i];
p[i]=1;
dif=0;
}
else {
p[i]=0;
}
}
for(i=1;i<=n;i++) if(p[i]==1) nr++;
g<<nr<<"\n";
for(i=1;i<=n;i++) if(p[i]==1) g<<a[i]<<" ";
}