Submission #529963

#	Time	Username	Problem	Language	Result	Execution time	Memory
529963		scottchou	Growing Vegetable is Fun 3 (JOI19_ho_t3)	C++17	0 / 100	1 ms	332 KiB

joi2019_ho_t3

#include<iostream>
#include<cassert>
using namespace std;
int const N = 405;
char a[N];
int main(){
    int n;
    cin >> n;
    int R = 0, G = 0;
    for(int i = 0; i < n; i++){
        cin >> a[i];
        if(a[i] == 'R'){
            R++;
        }else if(a[i] == 'G') {
            G++;
        }
        assert(a[i] != 'Y');
    }
    if(R != n / 2 && G != n / 2){
        cout << -1 << '\n';
        return 0;
    }
    if(n & 1){
        int cnt = 0;
        for(int i = 0; i < n; i += 2){
            if(R > G){
                if(a[i] != 'R'){
                    cnt++;
                }
            }else{
                if(a[i] != 'G'){
                    cnt++;
                }
            }
        }
        cout << cnt << '\n';
    }else{
        int cnt1 = 0, cnt2 = 0;
        for(int i = 0; i < n; i += 2){
            if(a[i] == 'R')
                cnt1++;
            else{
                cnt2++;
            }
        }
        cout << min(cnt1, cnt2) << '\n';
    }
}

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