#include <bits/stdc++.h>
#define int long long
#define ff first
#define ss second
#define all(x) x.begin(),x.end()
#define pb push_back
using namespace std;
int calc(char c1,char c2,string s){
int n=s.size();
int cnt=0,res=0;
for(int i=0;i<n;i++){
if(cnt%2==0){
if(s[i]!=c1){
s[i]=c1;
for(int j=i+1;j<n;j++){
if(s[j]==c1){
s[j]=c2;
res+=j-i;
break;
}
}
}
}
else{
if(s[i]!=c2){
s[i]=c2;
for(int j=i+1;j<n;j++){
if(s[j]==c2){
s[j]=c1;
res+=j-i;
break;
}
}
}
}
cnt++;
}
return res;
}
signed main(){
ios_base::sync_with_stdio();
cin.tie(0);cout.tie(0);
int n;
cin>>n;
string s;
cin>>s;
int cntR=0,cntG=0;
for(int i=0;i<s.size();i++){
if(s[i]=='R')cntR++;
else cntG++;
}
if(abs(cntR-cntG)>1){
cout<<-1;
return 0;
}
if(cntR>cntG){
cout<<calc('R','G',s)<<"\n";
}
else if(cntR<cntG){
cout<<calc('G','R',s)<<"\n";
}
if(cntR==cntG){
cout<<min(calc('G','R',s),calc('R','G',s))<<"\n";
}
}
/*
*/
Compilation message
joi2019_ho_t3.cpp: In function 'int main()':
joi2019_ho_t3.cpp:48:18: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
48 | for(int i=0;i<s.size();i++){
| ~^~~~~~~~~
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
0 ms |
348 KB |
Output is correct |
2 |
Correct |
0 ms |
348 KB |
Output is correct |
3 |
Incorrect |
0 ms |
348 KB |
Output isn't correct |
4 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
0 ms |
348 KB |
Output is correct |
2 |
Correct |
0 ms |
348 KB |
Output is correct |
3 |
Incorrect |
0 ms |
348 KB |
Output isn't correct |
4 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
348 KB |
Output is correct |
2 |
Correct |
0 ms |
348 KB |
Output is correct |
3 |
Correct |
0 ms |
348 KB |
Output is correct |
4 |
Correct |
0 ms |
424 KB |
Output is correct |
5 |
Correct |
0 ms |
348 KB |
Output is correct |
6 |
Correct |
0 ms |
432 KB |
Output is correct |
7 |
Correct |
0 ms |
348 KB |
Output is correct |
8 |
Correct |
0 ms |
348 KB |
Output is correct |
9 |
Correct |
0 ms |
348 KB |
Output is correct |
10 |
Correct |
0 ms |
348 KB |
Output is correct |
11 |
Correct |
0 ms |
348 KB |
Output is correct |
12 |
Correct |
0 ms |
348 KB |
Output is correct |
13 |
Correct |
0 ms |
348 KB |
Output is correct |
14 |
Correct |
0 ms |
432 KB |
Output is correct |
15 |
Correct |
1 ms |
348 KB |
Output is correct |
16 |
Correct |
0 ms |
348 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
0 ms |
348 KB |
Output is correct |
2 |
Correct |
0 ms |
348 KB |
Output is correct |
3 |
Incorrect |
0 ms |
348 KB |
Output isn't correct |
4 |
Halted |
0 ms |
0 KB |
- |