a = [75, 5, 10, 40, 50, 35,75]
inc = 0
exc = 0
for i in a:
t = exc + i
exc = max(inc,exc)
inc = t
print(max(inc,exc) - a[0])
YSA9IFs3NSwgIDUsIDEwLCA0MCwgNTAsIDM1LDc1XQppbmMgPSAwCmV4YyA9IDAKZm9yIGkgaW4gYToKICAgIHQgPSBleGMgKyBpCiAgICBleGMgPSBtYXgoaW5jLGV4YykKICAgIGluYyA9IHQKcHJpbnQobWF4KGluYyxleGMpIC0gYVswXSkKICAgIAo=