19/12/06 14:03:18 zI729h7a.net
>>101 julia
f(a,b)=(a+b)*(b-a+1)÷2
f(1,100) #-> 5050
f(50,80) #-> 2015
19/12/06 14:03:18 zI729h7a.net
>>101 julia
f(a,b)=(a+b)*(b-a+1)÷2
f(1,100) #-> 5050
f(50,80) #-> 2015
19/12/06 14:03:18 zI729h7a.net
>>101 julia
f(a,b)=(a+b)*(b-a+1)÷2
f(1,100) #-> 5050
f(50,80) #-> 2015