[BaekJoon][12852] 1로 만들기 2

BAEKJOON ONLINE JUDGE

12852 1로 만들기 2

https://www.acmicpc.net/problem/12852

#include <stdio.h>
#include <string.h>
#include <limits.h>
 
int dp[1000001];
int output[1000001];
 
int solve(int n)
{
    int min = 2147000000;
    int temp, out;
 
    if (dp[n] != -1)    return dp[n];
 
    if (n % 3 == 0) {
        temp = solve(n / 3);
        if (temp < min) {
            out = n / 3;
            min = temp;
        }
    }
    if (n % 2 == 0) {
        temp = solve(n / 2);
        if (temp < min) {
            out = n / 2;
            min = temp;
        }
    }
    temp = solve(n - 1);
    if (temp < min) {
        min = temp;
        out = n - 1;
    }
 
    output[n] = out;
    return dp[n] = min + 1;
}
 
void print(int n)
{
    printf("%d ", n);
    while (output[n] != 1) {
        printf("%d ", output[n]);
        n = output[n];
    }
    printf("1\n");
}
 
int main()
{
    int n;
 
    scanf("%d", &n);
 
    memset(dp, -1, sizeof(dp));
    dp[0] = dp[1] = 0;
 
    printf("%d\n", solve(n));
    print(n);
 
    return 0;
}