fnt = []
flow = []
sum_fnt = 0
rate = float(input('Actualization rate = '))
Number_fnt = int(input('FNT number = '))
invest = float(input('Amount invested = '))
rate = rate/100

for i in range(0, Number_fnt):
    flow.append(float(input('Flow {} value = '.format(i+1))))
    fnt.append(round(flow[i]*pow((1+rate), -(i+1)), 2))
    sum_fnt += round(fnt[i], 2)

van = round(-invest + sum_fnt, 2)
ip = round(1+((-invest + sum_fnt)/invest), 2)


def main():
    global sum_fnt
    answer = int(input('FNT 1, VAN 2, IP 3, DR 4, TIR 5, stop 6:'))
    print(answer)
    if answer == 1:
        for i in range(0, Number_fnt):
            print('FNT Y{}='.format(i+1), fnt[i])
        print('Sum FNT =', sum_fnt)

    elif answer == 2:
        print('VAN {}%='.format(round(rate*100, 0)), van)

    elif answer == 3:
        print('IP =', ip)

    elif answer == 4:
        x, fnta = 0, 0
        date = []
        sum_fnta = -invest
        for i in range(0, Number_fnt):
            sum_fnta += fnt[i]
            print('FNT Y{}='.format(i+1), fnt[i])
            print('Cumul FNTA Y{}='.format(i+1), round(sum_fnta, 2))

            if sum_fnta > 0 and x == 0:
                date.append(i)
                date.append((-fnta/fnt[i])*12)
                x = 1

            fnta = sum_fnta

        print('DR =', date[0], 'years', date[1], 'months')

    elif answer == 5:
        fnt_f = []
        sum_fnt = 0
        van_f = 1
        rate_f = rate
        while van_f > 0:
            rate_f += rate
            for i in range(0, Number_fnt):
                fnt_f.append(round(flow[i] * pow((1 + rate_f), -(i + 1)), 2))
                sum_fnt += round(fnt_f[i], 2)

            van_f = round(-invest + sum_fnt, 2)
            print('VAN {}%='.format(round(rate*100, 0)), van_f)

        tir = (-van/(van_f-van)) * (rate_f - rate) + rate
        print('TIR=', tir)

    elif answer == 6:
        quit()

    main()


main()