Submission #108749

#	Time	Username	Problem	Language	Result	Execution time	Memory
108749		tictaccat	Growing Vegetable is Fun 3 (JOI19_ho_t3)	C++14	15 / 100	4 ms	384 KiB

joi2019_ho_t3

#include <bits/stdc++.h>

using namespace std;

const int INF = 1e9;

int N;
string S;

int inv(vector<int> v) {
    int res = 0;
    bool sorted = false;
    while (!sorted) {
        sorted = true;
        for (int i = 0; i < v.size()-1; i++) {
            if (v[i] > v[i+1]) {
                swap(v[i],v[i+1]);
                res++;
                sorted = false;
            }
        }
    }
    return res;
}

int main() {

    cin >> N >> S;

    int cR = count(S.begin(),S.end(),'R'), cG = N-cR;


    if (abs(cG-cR) <= 1) {
        int distM = INF;
        if (cG >= cR) {
            int curR = 1, curG = 0;
            vector<int> v(N);
            for (int i = 0; i < N; i++) {
                if (S[i] == 'R') {
                    v[i] = curR;
                    curR += 2;
                }
                else if (S[i] == 'G') {
                    v[i] = curG;
                    curG += 2;
                }
            }
            distM = min(distM,inv(v));
        } 
        if (cR >= cG) {
            int curR = 0, curG = 1;
            vector<int> v(N);
            for (int i = 0; i < N; i++) {
                if (S[i] == 'R') {
                    v[i] = curR;
                    curR += 2;
                }
                else if (S[i] == 'G') {
                    v[i] = curG;
                    curG += 2;
                }
            }
            distM = min(distM,inv(v));
        }
        cout << distM << "\n";
    }

    else {
        cout << "-1\n";
    }


    return 0;
}

Compilation message (stderr)

joi2019_ho_t3.cpp: In function 'int inv(std::vector<int>)':
joi2019_ho_t3.cpp:15:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for (int i = 0; i < v.size()-1; i++) {
                         ~~^~~~~~~~~~~~

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