// 使用方法
// a.exe < input.txt
#include <stdio.h>
int main()
{
int count[256] = {0}, i,j;
char c;
if (c >= 'a' && c <= 'z') {
count[c - '\0']++;
}
}
for ( i = 0; i < 256; ++i) {
if (count[i]) {
for ( j = count[i]; j--;) {
}
}
}
return 0;
}
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