[C++ / 백준 1699번] 제곱수의 합

 

 

 

 

#include <iostream>
#include <algorithm>
#include <vector>
#include <cmath>
using namespace std;


int main() {
    vector<int> a;


    int N;
    cin >> N;
    

    vector<int> dp(N + 1, N);


    dp[0] = 0;

    for (int i = 1; i <= N; i++)
    {
        for (int j = 1; j * j <= i; j++)
        {
            dp[i] = min(dp[i], dp[i - j * j] + 1);
        }
    }



    cout << dp[N] << endl;


    return 0;
}