using namespace std;
 
double performancecounter_diff(LARGE_INTEGER *a, LARGE_INTEGER *b){
  LARGE_INTEGER freq;
  QueryPerformanceFrequency(&freq);
  return (double)(a->QuadPart - b->QuadPart) / (double)freq.QuadPart;
}  
main(){
 
 
  LARGE_INTEGER t_inicio, t_final;
  double sec; 
 
 	int x=0, may=0;
 
    cout << "Ingrese X" << endl;
    cin >>x;
 
    int dato[x];
 
    for(int k=0;k<x;k++){
cout << "Ingrese dato "<<k+1<<endl; 
        cin >> dato[k];
    }     
 
  QueryPerformanceCounter(&t_inicio);
 
    for(int k=0;k<x;k++){
        if (dato[k]>may){
            may = dato[k];
        }
    } 
 
  QueryPerformanceCounter(&t_final);
 
  sec = performancecounter_diff(&t_final, &t_inicio);
 
  cout << "El mayor es: "<< endl << may << endl;
 
  printf("%.16g millisegudos\n", sec * 1000.0);
 
   system("pause");
 
}

double microsegundos() {
	struct timeval t;
	if (gettimeofday(&t, NULL) < 0 )
		return 0.0;
	return (t.tv_usec + t.tv_sec * 1000000.0);
}