#include <bits/stdc++.h>
using namespace std;
const int mxN=400;
int n, dp[mxN][8][mxN+1][4], b[mxN][7];
string s;
int main() {
ios::sync_with_stdio(0);
cin.tie(0);
cin >> n >> s;
for(char &c : s)
c=(c>'G')+(c>'R');
for(int i=0; i<n; ++i) {
if(i)
memcpy(b[i], b[i-1], sizeof(b[0]));
for(int j=1; j<7; ++j)
if(j>>s[i]&1)
b[i][j]=s[i];
}
memset(dp, 0x3f, sizeof(dp));
dp[0][1<<s[0]][1][3]=0;
auto tm=[](int &a, int b) {
a=min(a, b);
};
for(int i=1; i<n; ++i) {
for(int j=1; j<7; ++j) {
for(int k=1; k<=i; ++k) {
for(int l=0; l<4; ++l) {
tm(dp[i][j|1<<s[i]][k+1][l], dp[i-1][j][k][l]);
if(j>>s[i]&1)
continue;
if(l!=s[i])
tm(dp[i][j][k][s[i]], dp[i-1][j][k][l]+k);
if(k>1)
tm(dp[i][j][k-1][s[i]], dp[i-1][j][k][l]+k-1);
else
tm(dp[i][1<<s[i]][1][b[i-1][j]], dp[i-1][j][1][l]);
}
}
}
}
int ans=1e9;
for(int i=1; i<5; ++i)
for(int j=0; j<4; ++j)
ans=min(dp[n-1][i][1][j], ans);
cout << (ans>=1e9?-1:ans);
}
Compilation message
joi2019_ho_t3.cpp: In function 'int main()':
joi2019_ho_t3.cpp:35:26: warning: array subscript has type 'char' [-Wchar-subscripts]
tm(dp[i][j][k][s[i]], dp[i-1][j][k][l]+k);
^
joi2019_ho_t3.cpp:37:28: warning: array subscript has type 'char' [-Wchar-subscripts]
tm(dp[i][j][k-1][s[i]], dp[i-1][j][k][l]+k-1);
^
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
17 ms |
20480 KB |
Output is correct |
| 2 |
Correct |
16 ms |
20472 KB |
Output is correct |
| 3 |
Correct |
17 ms |
20480 KB |
Output is correct |
| 4 |
Correct |
17 ms |
20352 KB |
Output is correct |
| 5 |
Correct |
17 ms |
20480 KB |
Output is correct |
| 6 |
Correct |
16 ms |
20344 KB |
Output is correct |
| 7 |
Correct |
19 ms |
20480 KB |
Output is correct |
| 8 |
Correct |
16 ms |
20480 KB |
Output is correct |
| 9 |
Correct |
16 ms |
20480 KB |
Output is correct |
| 10 |
Correct |
16 ms |
20480 KB |
Output is correct |
| 11 |
Correct |
17 ms |
20480 KB |
Output is correct |
| 12 |
Correct |
17 ms |
20352 KB |
Output is correct |
| 13 |
Correct |
16 ms |
20480 KB |
Output is correct |
| 14 |
Correct |
17 ms |
20480 KB |
Output is correct |
| 15 |
Correct |
17 ms |
20352 KB |
Output is correct |
| 16 |
Correct |
18 ms |
20480 KB |
Output is correct |
| 17 |
Correct |
16 ms |
20396 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
17 ms |
20480 KB |
Output is correct |
| 2 |
Correct |
16 ms |
20472 KB |
Output is correct |
| 3 |
Correct |
17 ms |
20480 KB |
Output is correct |
| 4 |
Correct |
17 ms |
20352 KB |
Output is correct |
| 5 |
Correct |
17 ms |
20480 KB |
Output is correct |
| 6 |
Correct |
16 ms |
20344 KB |
Output is correct |
| 7 |
Correct |
19 ms |
20480 KB |
Output is correct |
| 8 |
Correct |
16 ms |
20480 KB |
Output is correct |
| 9 |
Correct |
16 ms |
20480 KB |
Output is correct |
| 10 |
Correct |
16 ms |
20480 KB |
Output is correct |
| 11 |
Correct |
17 ms |
20480 KB |
Output is correct |
| 12 |
Correct |
17 ms |
20352 KB |
Output is correct |
| 13 |
Correct |
16 ms |
20480 KB |
Output is correct |
| 14 |
Correct |
17 ms |
20480 KB |
Output is correct |
| 15 |
Correct |
17 ms |
20352 KB |
Output is correct |
| 16 |
Correct |
18 ms |
20480 KB |
Output is correct |
| 17 |
Correct |
16 ms |
20396 KB |
Output is correct |
| 18 |
Correct |
17 ms |
20480 KB |
Output is correct |
| 19 |
Correct |
17 ms |
20480 KB |
Output is correct |
| 20 |
Correct |
17 ms |
20480 KB |
Output is correct |
| 21 |
Correct |
18 ms |
20480 KB |
Output is correct |
| 22 |
Correct |
18 ms |
20480 KB |
Output is correct |
| 23 |
Correct |
17 ms |
20480 KB |
Output is correct |
| 24 |
Correct |
17 ms |
20480 KB |
Output is correct |
| 25 |
Correct |
17 ms |
20480 KB |
Output is correct |
| 26 |
Correct |
17 ms |
20480 KB |
Output is correct |
| 27 |
Correct |
17 ms |
20480 KB |
Output is correct |
| 28 |
Correct |
17 ms |
20480 KB |
Output is correct |
| 29 |
Correct |
16 ms |
20480 KB |
Output is correct |
| 30 |
Correct |
16 ms |
20480 KB |
Output is correct |
| 31 |
Correct |
17 ms |
20480 KB |
Output is correct |
| 32 |
Correct |
17 ms |
20480 KB |
Output is correct |
| 33 |
Correct |
17 ms |
20480 KB |
Output is correct |
| 34 |
Correct |
17 ms |
20480 KB |
Output is correct |
| 35 |
Correct |
17 ms |
20480 KB |
Output is correct |
| 36 |
Correct |
17 ms |
20480 KB |
Output is correct |
| 37 |
Correct |
17 ms |
20480 KB |
Output is correct |
| 38 |
Correct |
21 ms |
20480 KB |
Output is correct |
| 39 |
Correct |
17 ms |
20480 KB |
Output is correct |
| 40 |
Correct |
17 ms |
20480 KB |
Output is correct |
| 41 |
Correct |
17 ms |
20480 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
17 ms |
20480 KB |
Output is correct |
| 2 |
Correct |
26 ms |
20516 KB |
Output is correct |
| 3 |
Correct |
26 ms |
20472 KB |
Output is correct |
| 4 |
Correct |
26 ms |
20480 KB |
Output is correct |
| 5 |
Correct |
24 ms |
20408 KB |
Output is correct |
| 6 |
Correct |
24 ms |
20480 KB |
Output is correct |
| 7 |
Correct |
26 ms |
20480 KB |
Output is correct |
| 8 |
Correct |
25 ms |
20480 KB |
Output is correct |
| 9 |
Correct |
25 ms |
20472 KB |
Output is correct |
| 10 |
Correct |
25 ms |
20480 KB |
Output is correct |
| 11 |
Correct |
26 ms |
20480 KB |
Output is correct |
| 12 |
Correct |
19 ms |
20480 KB |
Output is correct |
| 13 |
Correct |
21 ms |
20480 KB |
Output is correct |
| 14 |
Correct |
23 ms |
20480 KB |
Output is correct |
| 15 |
Correct |
25 ms |
20480 KB |
Output is correct |
| 16 |
Correct |
25 ms |
20480 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
17 ms |
20480 KB |
Output is correct |
| 2 |
Correct |
16 ms |
20472 KB |
Output is correct |
| 3 |
Correct |
17 ms |
20480 KB |
Output is correct |
| 4 |
Correct |
17 ms |
20352 KB |
Output is correct |
| 5 |
Correct |
17 ms |
20480 KB |
Output is correct |
| 6 |
Correct |
16 ms |
20344 KB |
Output is correct |
| 7 |
Correct |
19 ms |
20480 KB |
Output is correct |
| 8 |
Correct |
16 ms |
20480 KB |
Output is correct |
| 9 |
Correct |
16 ms |
20480 KB |
Output is correct |
| 10 |
Correct |
16 ms |
20480 KB |
Output is correct |
| 11 |
Correct |
17 ms |
20480 KB |
Output is correct |
| 12 |
Correct |
17 ms |
20352 KB |
Output is correct |
| 13 |
Correct |
16 ms |
20480 KB |
Output is correct |
| 14 |
Correct |
17 ms |
20480 KB |
Output is correct |
| 15 |
Correct |
17 ms |
20352 KB |
Output is correct |
| 16 |
Correct |
18 ms |
20480 KB |
Output is correct |
| 17 |
Correct |
16 ms |
20396 KB |
Output is correct |
| 18 |
Correct |
17 ms |
20480 KB |
Output is correct |
| 19 |
Correct |
17 ms |
20480 KB |
Output is correct |
| 20 |
Correct |
17 ms |
20480 KB |
Output is correct |
| 21 |
Correct |
18 ms |
20480 KB |
Output is correct |
| 22 |
Correct |
18 ms |
20480 KB |
Output is correct |
| 23 |
Correct |
17 ms |
20480 KB |
Output is correct |
| 24 |
Correct |
17 ms |
20480 KB |
Output is correct |
| 25 |
Correct |
17 ms |
20480 KB |
Output is correct |
| 26 |
Correct |
17 ms |
20480 KB |
Output is correct |
| 27 |
Correct |
17 ms |
20480 KB |
Output is correct |
| 28 |
Correct |
17 ms |
20480 KB |
Output is correct |
| 29 |
Correct |
16 ms |
20480 KB |
Output is correct |
| 30 |
Correct |
16 ms |
20480 KB |
Output is correct |
| 31 |
Correct |
17 ms |
20480 KB |
Output is correct |
| 32 |
Correct |
17 ms |
20480 KB |
Output is correct |
| 33 |
Correct |
17 ms |
20480 KB |
Output is correct |
| 34 |
Correct |
17 ms |
20480 KB |
Output is correct |
| 35 |
Correct |
17 ms |
20480 KB |
Output is correct |
| 36 |
Correct |
17 ms |
20480 KB |
Output is correct |
| 37 |
Correct |
17 ms |
20480 KB |
Output is correct |
| 38 |
Correct |
21 ms |
20480 KB |
Output is correct |
| 39 |
Correct |
17 ms |
20480 KB |
Output is correct |
| 40 |
Correct |
17 ms |
20480 KB |
Output is correct |
| 41 |
Correct |
17 ms |
20480 KB |
Output is correct |
| 42 |
Correct |
17 ms |
20480 KB |
Output is correct |
| 43 |
Correct |
26 ms |
20516 KB |
Output is correct |
| 44 |
Correct |
26 ms |
20472 KB |
Output is correct |
| 45 |
Correct |
26 ms |
20480 KB |
Output is correct |
| 46 |
Correct |
24 ms |
20408 KB |
Output is correct |
| 47 |
Correct |
24 ms |
20480 KB |
Output is correct |
| 48 |
Correct |
26 ms |
20480 KB |
Output is correct |
| 49 |
Correct |
25 ms |
20480 KB |
Output is correct |
| 50 |
Correct |
25 ms |
20472 KB |
Output is correct |
| 51 |
Correct |
25 ms |
20480 KB |
Output is correct |
| 52 |
Correct |
26 ms |
20480 KB |
Output is correct |
| 53 |
Correct |
19 ms |
20480 KB |
Output is correct |
| 54 |
Correct |
21 ms |
20480 KB |
Output is correct |
| 55 |
Correct |
23 ms |
20480 KB |
Output is correct |
| 56 |
Correct |
25 ms |
20480 KB |
Output is correct |
| 57 |
Correct |
25 ms |
20480 KB |
Output is correct |
| 58 |
Correct |
24 ms |
20480 KB |
Output is correct |
| 59 |
Correct |
24 ms |
20480 KB |
Output is correct |
| 60 |
Correct |
25 ms |
20480 KB |
Output is correct |
| 61 |
Correct |
25 ms |
20472 KB |
Output is correct |
| 62 |
Correct |
24 ms |
20580 KB |
Output is correct |
| 63 |
Correct |
26 ms |
20480 KB |
Output is correct |
| 64 |
Correct |
25 ms |
20472 KB |
Output is correct |
| 65 |
Correct |
25 ms |
20480 KB |
Output is correct |
| 66 |
Correct |
25 ms |
20476 KB |
Output is correct |
| 67 |
Correct |
25 ms |
20480 KB |
Output is correct |
| 68 |
Correct |
25 ms |
20480 KB |
Output is correct |
| 69 |
Correct |
25 ms |
20480 KB |
Output is correct |
| 70 |
Correct |
25 ms |
20480 KB |
Output is correct |
| 71 |
Correct |
26 ms |
20480 KB |
Output is correct |
| 72 |
Correct |
29 ms |
20516 KB |
Output is correct |
| 73 |
Correct |
27 ms |
20480 KB |
Output is correct |
