제출 #320564

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
320564		caoash	Growing Vegetable is Fun 3 (JOI19_ho_t3)	C++17	0 / 100	1 ms	364 KiB

joi2019_ho_t3

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

using ll = long long;

using vi = vector<int>;
using vl = vector<ll>;
#define pb push_back
#define all(x) begin(x), end(x)
#define sz(x) (int)(x).size()
#define lb lower_bound
#define ub upper_bound

using pi = pair<int,int>;
#define f first
#define s second
#define mp make_pair

const int MX = 200005;
const int MOD = (int) (1e9 + 7);
const ll INF = (ll) 1e18;

int main(){
#ifdef mikey 
    freopen("a.in", "r", stdin);
#endif
    ios::sync_with_stdio(false);
    cin.tie(0);
    int n; cin >> n;
    string s; cin >> s;
    int ops = 0;
    for (int i = 0; i < n - 1; i++) {
        if (s[i] == s[i + 1]) {
            bool found = false;
            for (int j = i + 2; j < n; j++) {
                if (s[j] != s[i]) {
                    for (int k = j; k > i; k--) {
                        ++ops;
                        swap(s[k], s[k - 1]);
                    }
                    found = true;
                }
            }
            if (!found) {
                cout << -1 << '\n';
                return 0;
            }
        }
    }
    cout << ops << '\n';
}

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