import java.util.*;

public class Practicer {
	//private int score = 0;  ?? why can't?

        public static void main(String[] args) {
        	int score = 0;
        	int[] sides = new int[3];

        	Scanner cin = new Scanner(System.in);

                while(cin.hasNext()){
                	for(int i=0;i<3;i++){
                		sides[i] = cin.nextInt();
                	}

                	Arrays.sort(sides);

                	if((sides[0]+sides[1]) > sides[2]){
                		score++;
                	}

                }
                System.out.println(score);
        }
}