#include <bits/stdc++.h>
using namespace std;
vector<int> pos[3];
int mem[404][404][404][3];
int vis[404][404][404][3];
int n;
string s;
int go(int x,int y,int z,int las)
{
if(x+y+z==n) return 0;
int &ret=mem[x][y][z][las];
if(vis[x][y][z][las]) return ret;
vis[x][y][z][las]=1;
ret=(1<<30);
int cpos=x+y+z;
if(x<pos[0].size()&&(las!=0||cpos==0))
ret=min(ret,go(x+1,y,z,0)+abs(cpos-pos[0][x]));
if(y<pos[1].size()&&(las!=1||cpos==0))
ret=min(ret,go(x,y+1,z,1)+abs(cpos-pos[1][y]));
if(z<pos[2].size()&&(las!=2||cpos==0))
ret=min(ret,go(x,y,z+1,2)+abs(cpos-pos[2][z]));
return ret;
}
int main()
{
cin >> n >> s;
for(int i=0;i<n;i++)
{
if(s[i]=='R') pos[0].push_back(i);
else if(s[i]=='G') pos[1].push_back(i);
else pos[2].push_back(i);
}
int ans=go(0,0,0,0);
if(ans>=(1<<30)) ans=-1;
else ans/=2;
cout << ans << endl;
}
Compilation message
joi2019_ho_t3.cpp: In function 'int go(int, int, int, int)':
joi2019_ho_t3.cpp:19:6: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
if(x<pos[0].size()&&(las!=0||cpos==0))
~^~~~~~~~~~~~~~
joi2019_ho_t3.cpp:21:6: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
if(y<pos[1].size()&&(las!=1||cpos==0))
~^~~~~~~~~~~~~~
joi2019_ho_t3.cpp:23:6: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
if(z<pos[2].size()&&(las!=2||cpos==0))
~^~~~~~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
5 ms |
376 KB |
Output is correct |
| 2 |
Correct |
5 ms |
376 KB |
Output is correct |
| 3 |
Correct |
5 ms |
376 KB |
Output is correct |
| 4 |
Correct |
5 ms |
504 KB |
Output is correct |
| 5 |
Correct |
5 ms |
504 KB |
Output is correct |
| 6 |
Correct |
6 ms |
760 KB |
Output is correct |
| 7 |
Correct |
5 ms |
504 KB |
Output is correct |
| 8 |
Correct |
5 ms |
632 KB |
Output is correct |
| 9 |
Correct |
5 ms |
632 KB |
Output is correct |
| 10 |
Correct |
5 ms |
504 KB |
Output is correct |
| 11 |
Incorrect |
5 ms |
760 KB |
Output isn't correct |
| 12 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
5 ms |
376 KB |
Output is correct |
| 2 |
Correct |
5 ms |
376 KB |
Output is correct |
| 3 |
Correct |
5 ms |
376 KB |
Output is correct |
| 4 |
Correct |
5 ms |
504 KB |
Output is correct |
| 5 |
Correct |
5 ms |
504 KB |
Output is correct |
| 6 |
Correct |
6 ms |
760 KB |
Output is correct |
| 7 |
Correct |
5 ms |
504 KB |
Output is correct |
| 8 |
Correct |
5 ms |
632 KB |
Output is correct |
| 9 |
Correct |
5 ms |
632 KB |
Output is correct |
| 10 |
Correct |
5 ms |
504 KB |
Output is correct |
| 11 |
Incorrect |
5 ms |
760 KB |
Output isn't correct |
| 12 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
5 ms |
376 KB |
Output is correct |
| 2 |
Correct |
13 ms |
6648 KB |
Output is correct |
| 3 |
Correct |
11 ms |
6648 KB |
Output is correct |
| 4 |
Correct |
11 ms |
6776 KB |
Output is correct |
| 5 |
Correct |
11 ms |
6652 KB |
Output is correct |
| 6 |
Correct |
11 ms |
6648 KB |
Output is correct |
| 7 |
Correct |
10 ms |
6648 KB |
Output is correct |
| 8 |
Correct |
10 ms |
6648 KB |
Output is correct |
| 9 |
Correct |
9 ms |
6648 KB |
Output is correct |
| 10 |
Correct |
9 ms |
6648 KB |
Output is correct |
| 11 |
Correct |
10 ms |
6648 KB |
Output is correct |
| 12 |
Correct |
7 ms |
3576 KB |
Output is correct |
| 13 |
Correct |
8 ms |
4728 KB |
Output is correct |
| 14 |
Correct |
9 ms |
5496 KB |
Output is correct |
| 15 |
Correct |
10 ms |
6664 KB |
Output is correct |
| 16 |
Correct |
10 ms |
6648 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
5 ms |
376 KB |
Output is correct |
| 2 |
Correct |
5 ms |
376 KB |
Output is correct |
| 3 |
Correct |
5 ms |
376 KB |
Output is correct |
| 4 |
Correct |
5 ms |
504 KB |
Output is correct |
| 5 |
Correct |
5 ms |
504 KB |
Output is correct |
| 6 |
Correct |
6 ms |
760 KB |
Output is correct |
| 7 |
Correct |
5 ms |
504 KB |
Output is correct |
| 8 |
Correct |
5 ms |
632 KB |
Output is correct |
| 9 |
Correct |
5 ms |
632 KB |
Output is correct |
| 10 |
Correct |
5 ms |
504 KB |
Output is correct |
| 11 |
Incorrect |
5 ms |
760 KB |
Output isn't correct |
| 12 |
Halted |
0 ms |
0 KB |
- |
