C++-字符串-找第一个只出现一次的字符（拓展01-计算出字符串中每一位字符的重复数量）
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Background
Description
计算出字符串中每一位字符的重复数量（同一个字符如果有多个就要体现多次，注意查看输入和输出）
Format
Input
Output
Samples
adfalawefbvalw
a:4
d:1
f:2
a:4
l:2
a:4
w:2
e:1
f:2
b:1
v:1
a:4
l:2
w:2
adsfadsfliefafae
a:4
d:2
s:2
f:4
a:4
d:2
s:2
f:4
l:1
i:1
e:2
f:4
a:4
f:4
a:4
e:2
Limitation
1s, 1024KiB for each test case.