Submission #872780

#	Time	Username	Problem	Language	Result	Execution time	Memory
872780		scrge	Growing Vegetable is Fun 3 (JOI19_ho_t3)	C++17	0 / 100	1064 ms	600 KiB

joi2019_ho_t3

#include <bits/stdc++.h>
using namespace std;

signed main(){
    int n; cin >> n;
    string s; cin >> s;
    map<char, vector<int>> pos;
    for(int i = 0; i < n; i++)
        pos[s[i]].push_back(i);

    auto check = [&](string t) -> int{
        int res = 0;
        map<char, int> ind;
        ind['R']=0, ind['G']=0, ind['Y']=0;
        for(int i = 0; i < n; i++){
            if(i < n-1) if(t[i] == t[i+1]) return 1e9;
            res += abs(i-pos[t[i]][ind[t[i]]++]);
        }
        return res;
    };

    int ans = 1e9;
    sort(begin(s), end(s));
    ans = min(ans, check(s));
    while(next_permutation(begin(s), end(s))){
        ans = min(ans, check(s));
        //cout << s << " " << ans << endl;
    }
    
    cout << (ans == 1e9 ? -1 : ans/2) << endl;
}

• Subtask 1: 0 / 5
• Subtask 2: 0 / 55
• Subtask 3: 0 / 15
• Subtask 4: 0 / 25