#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
int main(){
vector<ll> R,G,Y;
ll n;
cin>>n;
for(int i=0; i<n; i++)
{
char car;
cin>>car;
if(car=='R')
R.push_back(i);
else if(car=='G')
G.push_back(i);
else
Y.push_back(i);
}
//R.push_back(1e9);
//G.push_back(1e9);
//Y.push_back(1e9);
vector<vector<vector<vector<ll>>>> dp(n+2,vector<vector<vector<ll>>> (R.size()+2,vector<vector<ll>> (G.size()+2,vector<ll>(4,1e9))));
dp[0][0][0][0]=0;
for(int i=1; i<=n; i++)
{
for(int j=0; j<=R.size(); j++)
{
for(int k=0; k<=G.size(); k++)
{
if(i-j-k-1>=0&&i-j-k<=Y.size())
dp[i][j][k][3]=min(min({dp[i-1][j][k][2],dp[i-1][j][k][1],dp[i-1][j][k][0]})+max(0LL,Y[i-j-k-1]-i+1),dp[i][j][k][3]);
if(j>0)
dp[i][j][k][1]=min(min({dp[i-1][j-1][k][2],dp[i-1][j-1][k][3],dp[i-1][j-1][k][0]})+max(0LL,R[j-1]-i+1),dp[i][j][k][1]);
if(k>0)
dp[i][j][k][2]=min(min({dp[i-1][j][k-1][3],dp[i-1][j][k-1][1],dp[i-1][j][k-1][0]})+max(0LL,G[k-1]-i+1),dp[i][j][k][2]);
//cout<<j<<k<<" "<<dp[i][j][k][1]<<" "<<dp[i][j][k][2]<<" "<<dp[i][j][k][3]<<"\t";
}
// cout<<"\n";
}
//cout<<"\n\n";
}
//cerr<<"asd";
ll sol=min({dp[n][R.size()][G.size()][0],dp[n][R.size()][G.size()][1],dp[n][R.size()][G.size()][2],dp[n][R.size()][G.size()][3]});
if(sol>=1e9)
sol=-1;
cout<<sol;
}
Compilation message
joi2019_ho_t3.cpp: In function 'int main()':
joi2019_ho_t3.cpp:26:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
26 | for(int j=0; j<=R.size(); j++)
| ~^~~~~~~~~~
joi2019_ho_t3.cpp:28:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
28 | for(int k=0; k<=G.size(); k++)
| ~^~~~~~~~~~
joi2019_ho_t3.cpp:30:37: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
30 | if(i-j-k-1>=0&&i-j-k<=Y.size())
| ~~~~~^~~~~~~~~~
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
344 KB |
Output is correct |
2 |
Correct |
0 ms |
344 KB |
Output is correct |
3 |
Correct |
0 ms |
348 KB |
Output is correct |
4 |
Correct |
0 ms |
348 KB |
Output is correct |
5 |
Correct |
0 ms |
348 KB |
Output is correct |
6 |
Correct |
0 ms |
348 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 |
Incorrect |
0 ms |
436 KB |
Output isn't correct |
12 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
344 KB |
Output is correct |
2 |
Correct |
0 ms |
344 KB |
Output is correct |
3 |
Correct |
0 ms |
348 KB |
Output is correct |
4 |
Correct |
0 ms |
348 KB |
Output is correct |
5 |
Correct |
0 ms |
348 KB |
Output is correct |
6 |
Correct |
0 ms |
348 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 |
Incorrect |
0 ms |
436 KB |
Output isn't correct |
12 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
348 KB |
Output is correct |
2 |
Execution timed out |
609 ms |
1048576 KB |
Time limit exceeded |
3 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
344 KB |
Output is correct |
2 |
Correct |
0 ms |
344 KB |
Output is correct |
3 |
Correct |
0 ms |
348 KB |
Output is correct |
4 |
Correct |
0 ms |
348 KB |
Output is correct |
5 |
Correct |
0 ms |
348 KB |
Output is correct |
6 |
Correct |
0 ms |
348 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 |
Incorrect |
0 ms |
436 KB |
Output isn't correct |
12 |
Halted |
0 ms |
0 KB |
- |