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Cod sursa(job #349549)
//infoarena
#include <iostream>
#include <fstream>
using namespace std;
int dp[4000000];
int cifra;
void solve()
{
fstream f("test.in", ios::in);
f>>cifra;
f.close();
fstream g("test.out", ios::out);
if (cifra == 0)
g<<"1";
else
{
int nr=0;
int i=5;
while ( nr < cifra )
{
dp[i]=1+dp[i/5];
nr=nr+dp[i];
i=i+5;
}
g<<i-5;
}
g.close();
}
int main()
{
solve();
return 0;
}