Submission #1438859

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Source Code Expand

#include <iostream>
#include <vector>
#include <algorithm>
 
#define rep(i, n) for(int i = 0; i < (n); ++i)
 
using namespace std;

typedef long long ll;

const ll inf = 1e11;

int n, k;
int a[15];

ll calc(int f){
    int s = 0;
    ll c = 0;
    rep(i, n){
        if(f >> i & 1 && a[i] <= s){
            ++s;
            c += s - a[i];
        }
        else{
            s = max(a[i], s);
        }
    }
    return c;
}

int main(){
    cin >> n >> k;
    rep(i, n){
        cin >> a[i];
    }

    ll ans = inf;
    rep(i, 1 << n){
        int c = 0;
        rep(j, n){
            c += i >> j & 1;
        }
        if(c >= k){
            ans = min(calc(i), ans);
        }
    }
    cout << ans << endl;
    return 0;
}

Submission Info

Judge Result