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Cod sursa(job #633439)
# include <fstream>
using namespace std;
ifstream f ("elmaj.in");
ofstream g ("elmaj.out");
int a[1000005],nr,nra,i,n;
int main ()
{
f>>n;
for (i=1;i<=n;i++)
f>>a[i];
for (i=1;i<=n;i++)
if (nr==0)
{
nr=a[i];
nra=1;
}
else
if (nr==a[i])
nra++;
else
if (nra==1)
{
nr=0;
nra=0;
}
else
nra--;
nra=0;
for (i=1;i<=n;i++)
if (a[i]==nr)
nra++;
if (nra<=n/2)
g<<"-1";
else
g<<nr<<" "<<nra;
return 0;
}