#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 len = myStrlen(s);
    int i, j = 0;
 
    // 回文用の配列を確保
    tmp = (char *)malloc((2 * len + 1) * sizeof(char));
    if (tmp == NULL) {
        printf("メモリの割り当てに失敗しました。\n");
        exit(1);
    }
 
    // 元の文字列をコピー
    for (i = 0; s[i] != '\0'; i++) {
        tmp[j++] = s[i];
    }
 
    // 元の文字列を逆順にコピー
    for (i = len - 1; i >= 0; i--) {
        tmp[j++] = s[i];
    }
    tmp[j] = '\0'; // 文字列の終端を設定
 
    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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

MiAz

2 3