#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
	tmp=(int *)malloc(sizeof(char)*myStrlen(s)*2+1);
    if(tmp==NULL){
    	printf("ERROR\n");
    	return 0;
    }
 
    int i;
    int k=myStrlen(s);
    for(i=0;i<k;i++){
    	tmp[i]=s[i];
    }
    for(i=k;i>0;i--){
    	tmp[k*2-i]=s[i-1];
    }
 
    tmp[k*2+1]='\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