#include <bits/stdc++.h>
using namespace std;
void uin (int &a, int b) {
if (b < a) a = b;
}
int main() {
int n;
scanf ("%d",&n);
vector<vector<int>> pos(3), prep(3,vector<int>(n+1,n+1)); vector<int> done(3);
for (int i = 1; i <= n; i++) {
char ch; scanf (" %c",&ch);
int a = (ch == 'R' ? 0 : (ch == 'G' ? 1 : 2));
pos[a].push_back(i);
}
for (int j = 0; j <= 2; j++) for (int i = n-1; i >= 1; i--) prep[j][i] = upper_bound(pos[j].begin(),pos[j].end(),i) - pos[j].begin() + 1;
int a = (int)pos[0].size(), b = (int)pos[1].size(), c = (int)pos[2].size();
vector<vector<vector<vector<int>>>> dp(a+1,vector<vector<vector<int>>>(b+1,vector<vector<int>>(c+1,vector<int>(3,1e9))));
dp[0][0][0][0] = dp[0][0][0][1] = dp[0][0][0][2] = 0;
for (done[0] = 0; done[0] <= a; done[0]++) {
for (done[1] = 0; done[1] <= b; done[1]++) {
for (done[2] = 0; done[2] <= c; done[2]++) if (done[0] || done[1] || done[2]){
for (int take = 0; take <= 2; take++) if (done[take]) {
int idx = pos[take][done[take]-1], add = 0;
for (int j = 0; j <= 2; j++) if (j != take) {
int big = prep[j][idx];
add += max(0,done[j] - big + 1);
}
for (int lst = 0; lst <= 2; lst++) if (lst != take) {
uin(dp[done[0]][done[1]][done[2]][take],dp[done[0]-(take==0)][done[1]-(take==1)][done[2]-(take==2)][lst] + add);
}
}
}
}
}
int ret = 1e9;
for (int i = 0; i < 3; i++) uin(ret,dp[a][b][c][i]);
printf ("%d\n",ret>1e8?-1:ret);
return 0;
}
Compilation message
joi2019_ho_t3.cpp: In function 'int main()':
joi2019_ho_t3.cpp:8:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
8 | scanf ("%d",&n);
| ~~~~~~^~~~~~~~~
joi2019_ho_t3.cpp:11:18: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
11 | char ch; scanf (" %c",&ch);
| ~~~~~~^~~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
256 KB |
Output is correct |
| 2 |
Correct |
0 ms |
256 KB |
Output is correct |
| 3 |
Correct |
1 ms |
416 KB |
Output is correct |
| 4 |
Correct |
0 ms |
256 KB |
Output is correct |
| 5 |
Correct |
1 ms |
384 KB |
Output is correct |
| 6 |
Correct |
1 ms |
384 KB |
Output is correct |
| 7 |
Correct |
0 ms |
384 KB |
Output is correct |
| 8 |
Correct |
1 ms |
256 KB |
Output is correct |
| 9 |
Correct |
1 ms |
384 KB |
Output is correct |
| 10 |
Correct |
0 ms |
256 KB |
Output is correct |
| 11 |
Correct |
1 ms |
384 KB |
Output is correct |
| 12 |
Correct |
1 ms |
384 KB |
Output is correct |
| 13 |
Correct |
0 ms |
384 KB |
Output is correct |
| 14 |
Correct |
0 ms |
384 KB |
Output is correct |
| 15 |
Correct |
1 ms |
384 KB |
Output is correct |
| 16 |
Correct |
0 ms |
256 KB |
Output is correct |
| 17 |
Correct |
0 ms |
288 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
256 KB |
Output is correct |
| 2 |
Correct |
0 ms |
256 KB |
Output is correct |
| 3 |
Correct |
1 ms |
416 KB |
Output is correct |
| 4 |
Correct |
0 ms |
256 KB |
Output is correct |
| 5 |
Correct |
1 ms |
384 KB |
Output is correct |
| 6 |
Correct |
1 ms |
384 KB |
Output is correct |
| 7 |
Correct |
0 ms |
384 KB |
Output is correct |
| 8 |
Correct |
1 ms |
256 KB |
Output is correct |
| 9 |
Correct |
1 ms |
384 KB |
Output is correct |
| 10 |
Correct |
0 ms |
256 KB |
Output is correct |
| 11 |
Correct |
1 ms |
384 KB |
Output is correct |
| 12 |
Correct |
1 ms |
384 KB |
Output is correct |
| 13 |
Correct |
0 ms |
384 KB |
Output is correct |
| 14 |
Correct |
0 ms |
384 KB |
Output is correct |
| 15 |
Correct |
1 ms |
384 KB |
Output is correct |
| 16 |
Correct |
0 ms |
256 KB |
Output is correct |
| 17 |
Correct |
0 ms |
288 KB |
Output is correct |
| 18 |
Correct |
2 ms |
896 KB |
Output is correct |
| 19 |
Correct |
2 ms |
896 KB |
Output is correct |
| 20 |
Correct |
2 ms |
768 KB |
Output is correct |
| 21 |
Correct |
2 ms |
896 KB |
Output is correct |
| 22 |
Correct |
1 ms |
768 KB |
Output is correct |
| 23 |
Correct |
2 ms |
896 KB |
Output is correct |
| 24 |
Correct |
2 ms |
768 KB |
Output is correct |
| 25 |
Correct |
1 ms |
384 KB |
Output is correct |
| 26 |
Correct |
1 ms |
512 KB |
Output is correct |
| 27 |
Correct |
2 ms |
768 KB |
Output is correct |
| 28 |
Correct |
2 ms |
896 KB |
Output is correct |
| 29 |
Correct |
2 ms |
896 KB |
Output is correct |
| 30 |
Correct |
2 ms |
896 KB |
Output is correct |
| 31 |
Correct |
2 ms |
768 KB |
Output is correct |
| 32 |
Correct |
2 ms |
896 KB |
Output is correct |
| 33 |
Correct |
1 ms |
512 KB |
Output is correct |
| 34 |
Correct |
1 ms |
512 KB |
Output is correct |
| 35 |
Correct |
2 ms |
768 KB |
Output is correct |
| 36 |
Correct |
2 ms |
768 KB |
Output is correct |
| 37 |
Correct |
1 ms |
768 KB |
Output is correct |
| 38 |
Correct |
2 ms |
768 KB |
Output is correct |
| 39 |
Correct |
2 ms |
896 KB |
Output is correct |
| 40 |
Correct |
1 ms |
384 KB |
Output is correct |
| 41 |
Correct |
1 ms |
512 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
256 KB |
Output is correct |
| 2 |
Correct |
7 ms |
3840 KB |
Output is correct |
| 3 |
Correct |
7 ms |
3840 KB |
Output is correct |
| 4 |
Correct |
7 ms |
3840 KB |
Output is correct |
| 5 |
Correct |
7 ms |
3840 KB |
Output is correct |
| 6 |
Correct |
7 ms |
3840 KB |
Output is correct |
| 7 |
Correct |
7 ms |
3840 KB |
Output is correct |
| 8 |
Correct |
9 ms |
3840 KB |
Output is correct |
| 9 |
Correct |
7 ms |
3840 KB |
Output is correct |
| 10 |
Correct |
7 ms |
3840 KB |
Output is correct |
| 11 |
Correct |
7 ms |
3840 KB |
Output is correct |
| 12 |
Correct |
2 ms |
1408 KB |
Output is correct |
| 13 |
Correct |
4 ms |
1920 KB |
Output is correct |
| 14 |
Correct |
5 ms |
2688 KB |
Output is correct |
| 15 |
Correct |
7 ms |
3840 KB |
Output is correct |
| 16 |
Correct |
7 ms |
3840 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
256 KB |
Output is correct |
| 2 |
Correct |
0 ms |
256 KB |
Output is correct |
| 3 |
Correct |
1 ms |
416 KB |
Output is correct |
| 4 |
Correct |
0 ms |
256 KB |
Output is correct |
| 5 |
Correct |
1 ms |
384 KB |
Output is correct |
| 6 |
Correct |
1 ms |
384 KB |
Output is correct |
| 7 |
Correct |
0 ms |
384 KB |
Output is correct |
| 8 |
Correct |
1 ms |
256 KB |
Output is correct |
| 9 |
Correct |
1 ms |
384 KB |
Output is correct |
| 10 |
Correct |
0 ms |
256 KB |
Output is correct |
| 11 |
Correct |
1 ms |
384 KB |
Output is correct |
| 12 |
Correct |
1 ms |
384 KB |
Output is correct |
| 13 |
Correct |
0 ms |
384 KB |
Output is correct |
| 14 |
Correct |
0 ms |
384 KB |
Output is correct |
| 15 |
Correct |
1 ms |
384 KB |
Output is correct |
| 16 |
Correct |
0 ms |
256 KB |
Output is correct |
| 17 |
Correct |
0 ms |
288 KB |
Output is correct |
| 18 |
Correct |
2 ms |
896 KB |
Output is correct |
| 19 |
Correct |
2 ms |
896 KB |
Output is correct |
| 20 |
Correct |
2 ms |
768 KB |
Output is correct |
| 21 |
Correct |
2 ms |
896 KB |
Output is correct |
| 22 |
Correct |
1 ms |
768 KB |
Output is correct |
| 23 |
Correct |
2 ms |
896 KB |
Output is correct |
| 24 |
Correct |
2 ms |
768 KB |
Output is correct |
| 25 |
Correct |
1 ms |
384 KB |
Output is correct |
| 26 |
Correct |
1 ms |
512 KB |
Output is correct |
| 27 |
Correct |
2 ms |
768 KB |
Output is correct |
| 28 |
Correct |
2 ms |
896 KB |
Output is correct |
| 29 |
Correct |
2 ms |
896 KB |
Output is correct |
| 30 |
Correct |
2 ms |
896 KB |
Output is correct |
| 31 |
Correct |
2 ms |
768 KB |
Output is correct |
| 32 |
Correct |
2 ms |
896 KB |
Output is correct |
| 33 |
Correct |
1 ms |
512 KB |
Output is correct |
| 34 |
Correct |
1 ms |
512 KB |
Output is correct |
| 35 |
Correct |
2 ms |
768 KB |
Output is correct |
| 36 |
Correct |
2 ms |
768 KB |
Output is correct |
| 37 |
Correct |
1 ms |
768 KB |
Output is correct |
| 38 |
Correct |
2 ms |
768 KB |
Output is correct |
| 39 |
Correct |
2 ms |
896 KB |
Output is correct |
| 40 |
Correct |
1 ms |
384 KB |
Output is correct |
| 41 |
Correct |
1 ms |
512 KB |
Output is correct |
| 42 |
Correct |
0 ms |
256 KB |
Output is correct |
| 43 |
Correct |
7 ms |
3840 KB |
Output is correct |
| 44 |
Correct |
7 ms |
3840 KB |
Output is correct |
| 45 |
Correct |
7 ms |
3840 KB |
Output is correct |
| 46 |
Correct |
7 ms |
3840 KB |
Output is correct |
| 47 |
Correct |
7 ms |
3840 KB |
Output is correct |
| 48 |
Correct |
7 ms |
3840 KB |
Output is correct |
| 49 |
Correct |
9 ms |
3840 KB |
Output is correct |
| 50 |
Correct |
7 ms |
3840 KB |
Output is correct |
| 51 |
Correct |
7 ms |
3840 KB |
Output is correct |
| 52 |
Correct |
7 ms |
3840 KB |
Output is correct |
| 53 |
Correct |
2 ms |
1408 KB |
Output is correct |
| 54 |
Correct |
4 ms |
1920 KB |
Output is correct |
| 55 |
Correct |
5 ms |
2688 KB |
Output is correct |
| 56 |
Correct |
7 ms |
3840 KB |
Output is correct |
| 57 |
Correct |
7 ms |
3840 KB |
Output is correct |
| 58 |
Correct |
334 ms |
133240 KB |
Output is correct |
| 59 |
Correct |
339 ms |
133244 KB |
Output is correct |
| 60 |
Correct |
343 ms |
132344 KB |
Output is correct |
| 61 |
Correct |
347 ms |
133880 KB |
Output is correct |
| 62 |
Correct |
27 ms |
12416 KB |
Output is correct |
| 63 |
Correct |
49 ms |
20736 KB |
Output is correct |
| 64 |
Correct |
167 ms |
66680 KB |
Output is correct |
| 65 |
Correct |
240 ms |
95608 KB |
Output is correct |
| 66 |
Correct |
325 ms |
131916 KB |
Output is correct |
| 67 |
Correct |
344 ms |
131936 KB |
Output is correct |
| 68 |
Correct |
374 ms |
133920 KB |
Output is correct |
| 69 |
Correct |
345 ms |
134904 KB |
Output is correct |
| 70 |
Correct |
374 ms |
134340 KB |
Output is correct |
| 71 |
Correct |
332 ms |
131064 KB |
Output is correct |
| 72 |
Correct |
90 ms |
34296 KB |
Output is correct |
| 73 |
Correct |
22 ms |
10624 KB |
Output is correct |
