import csv
import sys

L=[]

f = open('waluty.csv', 'rt')
try:
    reader = csv.reader(f, delimiter=';')
    for row in reader:
        L.append(row)
finally:
    f.close()

a1=list_plot([(i,L[i][1]) for i in range(len(L))],color='orange', plotjoined=true)
a2=list_plot([(i,L[i][2]) for i in range(len(L))],color='green' , plotjoined=true)
show(a1+a2)

z=len(L)-1
x=L[z][1]
while z>=1:
    if x>=L[z-1][1]:
        z=z-1
    else:
        x=L[z-1][1]
        z=z-1
x, 'maksymalny kurs dolara'

z=len(L)-1
x=L[z][1]
while z>=1:
    if x<=L[z-1][1]:
        z=z-1
    else:
        x=L[z-1][1]
        z=z-1
x, 'minimalny kurs dolara'

z=len(L)-1
x=L[z][2]
while z>=1:
    if x>=L[z-1][2]:
        z=z-1
    else:
        x=L[z-1][2]
        z=z-1
x, 'maksymalny kurs euro'

z=len(L)-1
x=L[z][2]
while z>=1:
    if x<=L[z-1][2]:
        z=z-1
    else:
        x=L[z-1][2]
        z=z-1
x, 'minimalny kurs euro'