Submission #781704

#	Time	Username	Problem	Language	Result	Execution time	Memory
781704		vjudge1	Growing Vegetable is Fun 3 (JOI19_ho_t3)	C++17	0 / 100	1 ms	212 KiB

joi2019_ho_t3

#include <bits/stdc++.h>
using namespace std;
#define int long long
#define faster ios_base::sync_with_stdio(false);cin.tie(NULL);
#define OYY 1000000005
#define mod 998244353
#define mid (start+end)/2

int32_t main(){
    faster
    int n;cin>>n;
    int r=0,g=0,sr=0,sg=0;
    string s;cin>>s;
    if(s[0]=='R')sr++;
    else if(s[0]=='G')sg++;
    for(int i=1;i<n;i++){
        if(s[i]=='R')sr++;
        else if(s[i]=='G')sg++;
        if(s[i]=='R' && s[i-1]=='R'){
            r++;
        }
        else if(s[i]=='G' && s[i-1]=='G'){
            g++;
        }
    }
    if(n%2==0){
        if(sr==sg){
            cout<<max(r,g)<<'\n';
        }
        else cout<<-1<<'\n';
    }
    else{
        if(sr+1==sg || sr==sg+1){
            cout<<max(r,g)<<'\n';
        }
        else cout<<-1<<'\n';
    }
    return 0;
}

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