a = [5, 5, 10, 40, 50, 35]
inc = 0
exc = 0
for i in a:
t = exc + i
exc = max(inc,exc)
inc = t
print(max(inc,exc))
YSA9IFs1LCAgNSwgMTAsIDQwLCA1MCwgMzVdCmluYyA9IDAKZXhjID0gMApmb3IgaSBpbiBhOgogICAgdCA9IGV4YyArIGkKICAgIGV4YyA9IG1heChpbmMsZXhjKQogICAgaW5jID0gdApwcmludChtYXgoaW5jLGV4YykpCiAgICAK