#include <iostream>
#include <cmath>
using namespace std;
int i,x[1000],k;
int n,nr;
int main()
{
    cin >>n;
    for (i=1;i<=n;i++)
    {
        if (i%3==2)
            nr=nr*10+1;
        if (i%3==0)
            nr=nr*10+1;
        if (i%3==1)
            nr=nr*10+2;
    }
    i=n;
    while (i>=0)
    {
        x[i]=nr%10;
        nr=nr/10;
        i--;
    }
    nr=0;
    for (i=n;i>0;i--)
        nr=nr*10+x[i];
    k=1;
    for (i=1;i<=n;i++)
        k=k*2;
    if (nr%k==0)
        cout <<nr;
    else
        cout <<"No solution";
    return 0;
}
With this source code I get WA on test 4.
Pretty strange.HuH?

Edited by author 13.04.2011 13:45

Edited by author 13.04.2011 13:45