Cod sursa(job #1852451)
Utilizator | Ifrosa Diana DianaIfrosa | Data | 20 ianuarie 2017 20:11:34 |
---|---|---|---|
Problema | Elementul majoritar | Scor | 0 |
Compilator | cpp | Status | done |
Runda | Arhiva educationala | Marime | 0.54 kb |
#include <iostream>
#include <fstream>
using namespace std;
ifstream fin("elmaj.in");
ofstream fout("elmaj.out");
int a[1000002];
int main()
{
int n,i,maj,vot,ct;
fin>>n;
for(i=1;i<=n;i++)
fin>>a[i];
fin.close();
maj=a[1]; vot=1;
for(i=2;i<=n;i++)
if(a[i]==maj) vot++;
else if (vot>0) vot--;
else {maj=a[i]; vot=1;}
ct=0;
for(i=1;i<=n;i++)
if(a[i]==maj) ct++;
if(ct>=n/2+1) fout<<maj<<"\n";
else fout<<-1;
fout.close();
return 0;
}