Remove Redundant Characters

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Remove all redudant chacacters in a string.

For example, the input string is “abacaeedabcdcd”, the output will be “abced”.

Input

A string whose length is less than 100.

For example:

abacaeedabcdcd

Output

The processed string which removes all redundant chacacters.

For example:

abced

#include <stdio.h>
#include <string.h>
char input[101];
int main() {scanf("%s", input);int i, j, n = 0, m;long l = strlen(input);for (i = 0; i < l; i++) {if (input[i] != '\0') {n = input[i] - 'a';}for (j = i + 1; j <= l; j++) {m = input[j] - 'a';if (m == n) {input[j] = '\0';}}}for (i = 0; i < l; i++) {if (input[i] != '\0') {printf("%c", input[i]);}}printf("\n");return 0;
}

注意理解字符串与askii码的关系。
不见得一定要剔除一个字符，可以直接让它不print。

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