网易这题是在逗我嘛
var s = readline()
var len = 1
for (var i = 1; i < s.length; i++) {
if (s[i] != s[i - 1]) {
len++
}
}
print((s.length / len).toFixed(2))
#网易#
var s = readline()
var len = 1
for (var i = 1; i < s.length; i++) {
if (s[i] != s[i - 1]) {
len++
}
}
print((s.length / len).toFixed(2))
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