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Cod sursa(job #946518)
#include <fstream>
using namespace std;
int n,x,a[1000000],i,j,nr=1;
int main ()
{ifstream f("elmaj.in");
ofstream g("elmaj.out");
f>>n;
for(i=1;i<=n;i++) f>>a[i];
x=a[1];
for(i=2;i<=n;i++){
if(a[i]==x) nr++;
else{ nr--;
if(nr<=0){x=a[i]; nr=1;} }
}
nr=0;
for(i=1;i<=n;i++)
if(a[i]==x) nr++;
if(nr>=n/2+1) g<<x<<" "<<nr;
else g<<-1;
return 0;
}