Submission #1089383

#	Time	Username	Problem	Language	Result	Execution time	Memory
1089383		vjudge1	Growing Vegetable is Fun 3 (JOI19_ho_t3)	C++17	15 / 100	1 ms	412 KiB

joi2019_ho_t3

#include <bits/stdc++.h>
//qwerty47924692
using namespace std;
using ll = long long;
#define f first
#define s second
const ll N=3e5+29;
ll cur1,cur2,cnt[2],n;
string s;

int main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);

    cin>>n>>s;
    for(char i:s){
        if(i=='G')cnt[0]++;
        else cnt[1]++;
    }
    ll ans=1e18;
    if(abs(cnt[1]-cnt[0])>1){
        cout<<-1;
        return 0;
    }
    if(cnt[1]>=cnt[0]){
        cur1=0;
        cur2=1;
        ll sum=0;
        for(ll i=0;i<n;i++){
            if(s[i]=='R'){
                sum+=abs(i-cur1);
                cur1+=2;
            }
            else{
                sum+=abs(i-cur2);
                cur2+=2;
            }
        }
        ans=min(ans,sum);
    }
    if(cnt[1]<=cnt[0]){
        cur1=1;
        cur2=0;
        ll sum=0;
        for(ll i=0;i<n;i++){
            if(s[i]=='R'){
                sum+=abs(i-cur1);
                //cout<<cur1<<' ';
                cur1+=2;
            }
            else{
                sum+=abs(i-cur2);
              //  cout<<cur2<<' ';
                cur2+=2;
            }
        }
        ans=min(ans,sum);
    }
    cout<<ans/2;
}

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