#include<bits/stdc++.h>
using namespace std;
int ans;
string s;
int main(){
int n;
cin>>n;
cin>>s;
vector<int> V[3];
for(int i=0; i<n; i++){
int c=0;
if(s[i]=='G')c=1;
if(s[i]=='R')c=2;
V[c].push_back(i+1);
}
vector<vector<vector<vector<int> > > > dp(3, vector<vector<vector<int> > >(V[0].size()+1
, vector<vector<int>>(V[1].size()+1, vector<int>(V[2].size()+1, 1e9))));
dp[0][0][0][0]=dp[1][0][0][0]=dp[2][0][0][0]=0;
for(int s=1; s<=n; s++){
for(int i=0; i<=V[0].size(); i++){
for(int j=0; j<=V[1].size(); j++){
//for(int k=0; k<=V[2].size(); k++){
int k=s-i-j;
if(k<0 || k>V[2].size())continue;
//if(!k && !i && !j)continue;
if(i)dp[0][i][j][k]=min(dp[1][i-1][j][k], dp[2][i-1][j][k])+abs(i+j+k-V[0][i-1]);
if(j)dp[1][i][j][k]=min(dp[0][i][j-1][k], dp[2][i][j-1][k])+abs(i+j+k-V[1][j-1]);
if(k)dp[2][i][j][k]=min(dp[1][i][j][k-1], dp[0][i][j][k-1])+abs(i+j+k-V[2][k-1]);
//}
//cout<<i<<" "<<j<<" "<<k<<" "<<dp[0][i][j][k]<<" "<<dp[1][i][j][k]<<" "<<dp[2][i][j][k]<<"\n";
}
}
}
int a=V[0].size(), b=V[1].size(), c=V[2].size();
//cout<<a<<" "<<b<<" "<<c<<" ";
/*for(int i=0; i<=a; i++){
for(int j=0; j<=b; j++){
for(int k=0; k<=b;)
}
}*/
int k=min({dp[0][a][b][c], dp[1][a][b][c], dp[2][a][b][c]});
if(k>=1e9)cout<<-1;
else cout<<k/2<<"\n";
}
Compilation message
joi2019_ho_t3.cpp: In function 'int main()':
joi2019_ho_t3.cpp:21:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
21 | for(int i=0; i<=V[0].size(); i++){
| ~^~~~~~~~~~~~~
joi2019_ho_t3.cpp:22:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
22 | for(int j=0; j<=V[1].size(); j++){
| ~^~~~~~~~~~~~~
joi2019_ho_t3.cpp:25:28: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
25 | if(k<0 || k>V[2].size())continue;
| ~^~~~~~~~~~~~
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
212 KB |
Output is correct |
2 |
Correct |
0 ms |
212 KB |
Output is correct |
3 |
Correct |
0 ms |
212 KB |
Output is correct |
4 |
Correct |
0 ms |
212 KB |
Output is correct |
5 |
Correct |
1 ms |
212 KB |
Output is correct |
6 |
Correct |
0 ms |
212 KB |
Output is correct |
7 |
Correct |
0 ms |
212 KB |
Output is correct |
8 |
Correct |
0 ms |
212 KB |
Output is correct |
9 |
Correct |
0 ms |
212 KB |
Output is correct |
10 |
Correct |
0 ms |
212 KB |
Output is correct |
11 |
Incorrect |
0 ms |
212 KB |
Output isn't correct |
12 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
212 KB |
Output is correct |
2 |
Correct |
0 ms |
212 KB |
Output is correct |
3 |
Correct |
0 ms |
212 KB |
Output is correct |
4 |
Correct |
0 ms |
212 KB |
Output is correct |
5 |
Correct |
1 ms |
212 KB |
Output is correct |
6 |
Correct |
0 ms |
212 KB |
Output is correct |
7 |
Correct |
0 ms |
212 KB |
Output is correct |
8 |
Correct |
0 ms |
212 KB |
Output is correct |
9 |
Correct |
0 ms |
212 KB |
Output is correct |
10 |
Correct |
0 ms |
212 KB |
Output is correct |
11 |
Incorrect |
0 ms |
212 KB |
Output isn't correct |
12 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
0 ms |
212 KB |
Output is correct |
2 |
Correct |
1 ms |
1108 KB |
Output is correct |
3 |
Correct |
1 ms |
1108 KB |
Output is correct |
4 |
Correct |
1 ms |
1108 KB |
Output is correct |
5 |
Correct |
1 ms |
1108 KB |
Output is correct |
6 |
Correct |
1 ms |
1108 KB |
Output is correct |
7 |
Correct |
1 ms |
1108 KB |
Output is correct |
8 |
Correct |
1 ms |
1108 KB |
Output is correct |
9 |
Correct |
1 ms |
1108 KB |
Output is correct |
10 |
Correct |
1 ms |
1108 KB |
Output is correct |
11 |
Correct |
1 ms |
1108 KB |
Output is correct |
12 |
Correct |
1 ms |
468 KB |
Output is correct |
13 |
Correct |
1 ms |
596 KB |
Output is correct |
14 |
Correct |
1 ms |
852 KB |
Output is correct |
15 |
Correct |
2 ms |
1108 KB |
Output is correct |
16 |
Correct |
1 ms |
1108 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
212 KB |
Output is correct |
2 |
Correct |
0 ms |
212 KB |
Output is correct |
3 |
Correct |
0 ms |
212 KB |
Output is correct |
4 |
Correct |
0 ms |
212 KB |
Output is correct |
5 |
Correct |
1 ms |
212 KB |
Output is correct |
6 |
Correct |
0 ms |
212 KB |
Output is correct |
7 |
Correct |
0 ms |
212 KB |
Output is correct |
8 |
Correct |
0 ms |
212 KB |
Output is correct |
9 |
Correct |
0 ms |
212 KB |
Output is correct |
10 |
Correct |
0 ms |
212 KB |
Output is correct |
11 |
Incorrect |
0 ms |
212 KB |
Output isn't correct |
12 |
Halted |
0 ms |
0 KB |
- |