void main() {
	int nbEtud; 
	double math; 
	double ang; 
	double moy; 
	String avis; 
	int k; 
	double moyMath; 
	double moyAng;
	nbEtud = readInt( "nbEtud : " ); 
	moyMath = 0; 
	moyAng = 0; 
	for(k=1; k<=nbEtud; k=k+1) {
		math = readDouble( "math : " ); 
		ang = readDouble( "ang : " ); 
		moy = (math+ang)/2; 
		if (moy<10) {
			avis = "refuse"; 
		}
		else if (moy<12) {
			avis = "passable"; 
		}
		else if (moy<14) {
			avis = "assez bien"; 
		}
		else if (moy<16) {
			avis = "bien"; 
		}
		else {
			avis = "tres bien"; 
		}
		println( "moy : " + moy ); 
		println( "avis : " + avis ); 
		moyMath = moyMath + math/nbEtud;
		moyAng = moyAng + ang/nbEtud;  
	}
	println( "moyMath : " + moyMath ); 
	println( "moyAng : " + moyAng ); 
}