Varianta63-s3e4.cpp

#include <iostream>
#include <fstream>
using namespace std;


int main() {

	ifstream f("date.in");
	int prec,a,urm,nr = 0;
	f >> a;
	prec = -1;

	while (f >> urm) {
		
		if (a < prec + urm && prec != -1)
			nr++;
		
		prec = a;
		a = urm;
	}

	cout << nr;

	return 0;
}