20-programare

#include<iostream>
#include<fstream>

using namespace std;


int main(){
    ifstream f1("atestat.in");
    ofstream f2("atestat.out");
    int x,y,ok,nr=0,i=0,v[100],a,b[9],j;
    while(f1>>x){
        i++;
        v[i]=x;
        y=x;
        ok=0;
        while(y != 0 && ok == 0){
            if(y % 10 == 0){
                nr++;
                ok=1;
            }
            y=y/10;
        }
    }
    f2<<nr<<endl;
    x=v[1];
    ok=0;
    for(j=2;j<=i && ok == 0;j++){
        a=1;
        while(x != 0 && ok == 0 ){
            b[a]=x;
            if(b[a] == v[j]){
                ok=1;
                f2<<b[1]<<" "<<v[j];
            }
            a++;
            x=x/10;
        }
        x=v[j];
    }

}