B1006

#include <stdio.h>int main(){    int n;    scanf("%d", &n);    int num = 0, ans[5];    while( n!= 0){ // 将 n 的每一位存放到ans 数组中         ans[num++] = n%10;        n /= 10;    }    for (int i = num-1; i>=0; i--){        switch(i){            case 2:                for (int j=0; j<ans[i]; j++)                    printf("B");                break;            case 1:                for (int j=0; j<ans[i]; j++)                    printf("S");                break;            case 0:                for (int j=1; j<=ans[i]; j++)                    printf("%d", j);                break;        }    }    return 0;}