1로 만들기

#include <algorithm> #include <iostream> #include <vector> int g_goal; std::vector<int> g_memoization; void pre_setting(void) { std::ios_base::sync_with_stdio(false); std::cin.tie(NULL); std::cout.tie(NULL); } void input_action(void) { std::cin >> g_goal; g_memoization = std::vector<int>(g_goal + 1, 0); } void logic(void) { int i; i = 1; while (++i <= g_goal) { g_memoization[i] = g_memoization[i - 1] + 1; if (!(i % 3)) g_memoization[i] = std::min(g_memoization[i], g_memoization[i / 3] + 1); if (!(i % 2)) g_memoization[i] = std::min(g_memoization[i], g_memoization[i / 2] + 1); } } void output_action(void) { std::cout << g_memoization[g_goal]; } void solution(void) { input_action(); logic(); output_action(); } int main(void) { pre_setting(); solution(); return (0); }