#include <stdio.h>
#include <stdlib.h>
 
int myStrlen(char s[]){
    int i;
    for(i=0;s[i]!='\0';i++);
    return i;
}
 
// 関数の中でtmpに対してmallocして
// そこに回文を代入してreturnで返しましょう
char *setPalindrome(char s[]){
	char *tmp;
	//以下に必要な宣言を含めて書いてください
	int i;
	int len = myStrlen(s);
 
	tmp = (char *)malloc(sizeof(char) * (len * 2 + 1));
 
	for(i=0; i<len ; i++){
		tmp[i] = s[i];
	}
 
	for(i=0; i<len; i++){
		tmp[len+i] = s[len-1-i];
	}
 
	tmp[len*2] = '\0';
 
	return tmp;
}
 
 
//メイン関数はいじる必要はありません
int main(){
    int i;
    char nyuryoku[1024]; //入力
    char *kaibun;   //回文を受け取る
    scanf("%s",nyuryoku);
    kaibun = setPalindrome(nyuryoku);
    printf("%s\n  -> %s\n",nyuryoku,kaibun);
    free(kaibun);
    return 0;
}
 

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

YWJjZA==

abcd