def function1(flname):
f=open(flname)
a=f.readlines()
del a[0]
L3=[]
for line in a:
line=line.strip()
L1=line.split()
avg_score=int((int(L1[1])+int(L1[2]))/2)
L3.append([L1[0],avg_score])
f.close()
print("学号 平均分")
for L2 in L3:
print(L2[0]+" "+str(L2[1]))