Cod sursa(job #1060973)

Utilizator buzu.tudor67Tudor Buzu buzu.tudor67 Data 18 decembrie 2013 22:57:15
Problema Elementul majoritar Scor 100
Compilator cpp Status done
Runda Teme Pregatire ACM Unibuc 2013 Marime 0.57 kb
#include<fstream>
#define maxn 1000006
using namespace std;
ifstream fi("elmaj.in");
ofstream fo("elmaj.out");

int a[maxn],i,n,nr,maj;

int main(void){
    fi>>n;
    for(i=1;i<=n;i++) fi>>a[i];
    
    nr=1; maj=a[1];
    for(i=2;i<=n;i++)
        if (a[i]==maj) nr++;
        else {
              nr--;
              if (nr<0) { nr=1; maj=a[i]; }
             }              
    
    nr=0;
    for(i=1;i<=n;i++) if (a[i]==maj) nr++;
    
    if (nr<(n/2)+1) fo<<"-1";
    else fo<<maj<<" "<<nr;
    
    fi.close();
    fo.close();
    return 0;
}