#include <stdio.h>
 
// 0-15の数値を16進数の1文字として表示する関数
void print_hex(int n) {
    if (n >= 0 && n <= 9) {
        printf("%d", n);
    } else if (n >= 10 && n <= 15) {
        printf("%c", 'A' + (n - 10));
    }
}
 
void tohex(int n) {
	if(n==0) return;
 
    tohex(n / 16);
    print_hex(n % 16);
}
 
int main() {
    int n;
    scanf("%d", &n);
 
    printf("%dの16進数表記: ", n);
    if (n == 0) printf("0");
    else tohex(n);
    printf("\n");
 
    return 0;
}

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

MjA=

20