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Submission #256395

# Submission time Handle Problem Language Result Execution time Memory
256395 2020-08-02T16:09:40 Z Osama_Alkhodairy Growing Vegetable is Fun 3 (JOI19_ho_t3) C++17
75 / 100
 500 ms 757624 KB 
#include <bits/stdc++.h>
using namespace std;
#define finish(x) return cout << x << endl, 0
#define ll long long

const int N = 401;

int n, dp[N][N][N][3], sum[N][3], pos[N][3];
string s;

int get_sum(int idx, int l, int r){
    if(r < l || l == -1 || r == -1) return 0;
    return sum[r][idx] - (l == 0 ? 0 : sum[l - 1][idx]);
}
int solve(int a, int b, int c, int las){
    if(a + b + c == n) return 0;
    int &ret = dp[a][b][c][las];
    if(ret != -1) return ret;
    ret = 1e9;
    if((las != 0 || a + b + c == 0) && pos[a][0] != -1){
        ret = min(ret, solve(a + 1, b, c, 0) + get_sum(1, pos[b][1], pos[a][0]) + get_sum(2, pos[c][2], pos[a][0]));
    }
    if((las != 1 || a + b + c == 0) && pos[b][1] != -1){
        ret = min(ret, solve(a, b + 1, c, 1) + get_sum(0, pos[a][0], pos[b][1]) + get_sum(2, pos[c][2], pos[b][1]));
    }
    if((las != 2 || a + b + c == 0) && pos[c][2] != -1){
        ret = min(ret, solve(a, b, c + 1, 2) + get_sum(0, pos[a][0], pos[c][2]) + get_sum(1, pos[b][1], pos[c][2]));
    }
    return ret;
}
int main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    memset(pos, -1, sizeof pos);
    memset(dp, -1, sizeof dp);
    cin >> n >> s;
    for(int i = 0 ; i < n ; i++){
        if(s[i] == 'R') s[i] = 0;
        else if(s[i] == 'G') s[i] = 1;
        else s[i] = 2;
        for(int j = 0 ; j < 3 ; j++){
            if(i > 0) sum[i][j] = sum[i - 1][j];
            sum[i][j] += s[i] == j;
        }
    }
    int pt0 = 0, pt1 = 0, pt2 = 0;
    for(int i = 0 ; i < n ; i++){
        if(s[i] == 0) pos[pt0++][0] = i;
        else if(s[i] == 1) pos[pt1++][1] = i;
        else pos[pt2++][2] = i;
    }
    int ans = solve(0, 0, 0, 0);
    if(ans == 1e9) ans = -1;
    cout << ans << endl;
}

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 387 ms 757624 KB Output is correct
2 Correct 388 ms 757496 KB Output is correct
3 Correct 387 ms 757496 KB Output is correct
4 Correct 387 ms 757496 KB Output is correct
5 Correct 387 ms 757496 KB Output is correct
6 Correct 412 ms 757496 KB Output is correct
7 Correct 395 ms 757624 KB Output is correct
8 Correct 387 ms 757496 KB Output is correct
9 Correct 386 ms 757496 KB Output is correct
10 Correct 413 ms 757496 KB Output is correct
11 Correct 383 ms 757496 KB Output is correct
12 Correct 393 ms 757624 KB Output is correct
13 Correct 379 ms 757496 KB Output is correct
14 Correct 384 ms 757624 KB Output is correct
15 Correct 381 ms 757492 KB Output is correct
16 Correct 371 ms 757496 KB Output is correct
17 Correct 386 ms 757500 KB Output is correct

Subtask #2
55.0 / 55.0

# Verdict Execution time Memory Grader output
1 Correct 387 ms 757624 KB Output is correct
2 Correct 388 ms 757496 KB Output is correct
3 Correct 387 ms 757496 KB Output is correct
4 Correct 387 ms 757496 KB Output is correct
5 Correct 387 ms 757496 KB Output is correct
6 Correct 412 ms 757496 KB Output is correct
7 Correct 395 ms 757624 KB Output is correct
8 Correct 387 ms 757496 KB Output is correct
9 Correct 386 ms 757496 KB Output is correct
10 Correct 413 ms 757496 KB Output is correct
11 Correct 383 ms 757496 KB Output is correct
12 Correct 393 ms 757624 KB Output is correct
13 Correct 379 ms 757496 KB Output is correct
14 Correct 384 ms 757624 KB Output is correct
15 Correct 381 ms 757492 KB Output is correct
16 Correct 371 ms 757496 KB Output is correct
17 Correct 386 ms 757500 KB Output is correct
18 Correct 385 ms 757496 KB Output is correct
19 Correct 376 ms 757496 KB Output is correct
20 Correct 397 ms 757496 KB Output is correct
21 Correct 384 ms 757496 KB Output is correct
22 Correct 402 ms 757500 KB Output is correct
23 Correct 378 ms 757624 KB Output is correct
24 Correct 382 ms 757496 KB Output is correct
25 Correct 375 ms 757624 KB Output is correct
26 Correct 384 ms 757500 KB Output is correct
27 Correct 405 ms 757496 KB Output is correct
28 Correct 395 ms 757496 KB Output is correct
29 Correct 385 ms 757496 KB Output is correct
30 Correct 396 ms 757532 KB Output is correct
31 Correct 376 ms 757624 KB Output is correct
32 Correct 394 ms 757496 KB Output is correct
33 Correct 390 ms 757500 KB Output is correct
34 Correct 377 ms 757624 KB Output is correct
35 Correct 379 ms 757496 KB Output is correct
36 Correct 378 ms 757592 KB Output is correct
37 Correct 380 ms 757500 KB Output is correct
38 Correct 380 ms 757624 KB Output is correct
39 Correct 391 ms 757496 KB Output is correct
40 Correct 383 ms 757424 KB Output is correct
41 Correct 376 ms 757496 KB Output is correct

Subtask #3
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 378 ms 757500 KB Output is correct
2 Correct 373 ms 757496 KB Output is correct
3 Correct 381 ms 757496 KB Output is correct
4 Correct 376 ms 757496 KB Output is correct
5 Correct 382 ms 757624 KB Output is correct
6 Correct 374 ms 757496 KB Output is correct
7 Correct 378 ms 757496 KB Output is correct
8 Correct 385 ms 757496 KB Output is correct
9 Correct 410 ms 757500 KB Output is correct
10 Correct 374 ms 757624 KB Output is correct
11 Correct 383 ms 757500 KB Output is correct
12 Correct 374 ms 757496 KB Output is correct
13 Correct 373 ms 757576 KB Output is correct
14 Correct 372 ms 757496 KB Output is correct
15 Correct 371 ms 757500 KB Output is correct
16 Correct 374 ms 757496 KB Output is correct

Subtask #4
0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 387 ms 757624 KB Output is correct
2 Correct 388 ms 757496 KB Output is correct
3 Correct 387 ms 757496 KB Output is correct
4 Correct 387 ms 757496 KB Output is correct
5 Correct 387 ms 757496 KB Output is correct
6 Correct 412 ms 757496 KB Output is correct
7 Correct 395 ms 757624 KB Output is correct
8 Correct 387 ms 757496 KB Output is correct
9 Correct 386 ms 757496 KB Output is correct
10 Correct 413 ms 757496 KB Output is correct
11 Correct 383 ms 757496 KB Output is correct
12 Correct 393 ms 757624 KB Output is correct
13 Correct 379 ms 757496 KB Output is correct
14 Correct 384 ms 757624 KB Output is correct
15 Correct 381 ms 757492 KB Output is correct
16 Correct 371 ms 757496 KB Output is correct
17 Correct 386 ms 757500 KB Output is correct
18 Correct 385 ms 757496 KB Output is correct
19 Correct 376 ms 757496 KB Output is correct
20 Correct 397 ms 757496 KB Output is correct
21 Correct 384 ms 757496 KB Output is correct
22 Correct 402 ms 757500 KB Output is correct
23 Correct 378 ms 757624 KB Output is correct
24 Correct 382 ms 757496 KB Output is correct
25 Correct 375 ms 757624 KB Output is correct
26 Correct 384 ms 757500 KB Output is correct
27 Correct 405 ms 757496 KB Output is correct
28 Correct 395 ms 757496 KB Output is correct
29 Correct 385 ms 757496 KB Output is correct
30 Correct 396 ms 757532 KB Output is correct
31 Correct 376 ms 757624 KB Output is correct
32 Correct 394 ms 757496 KB Output is correct
33 Correct 390 ms 757500 KB Output is correct
34 Correct 377 ms 757624 KB Output is correct
35 Correct 379 ms 757496 KB Output is correct
36 Correct 378 ms 757592 KB Output is correct
37 Correct 380 ms 757500 KB Output is correct
38 Correct 380 ms 757624 KB Output is correct
39 Correct 391 ms 757496 KB Output is correct
40 Correct 383 ms 757424 KB Output is correct
41 Correct 376 ms 757496 KB Output is correct
42 Correct 378 ms 757500 KB Output is correct
43 Correct 373 ms 757496 KB Output is correct
44 Correct 381 ms 757496 KB Output is correct
45 Correct 376 ms 757496 KB Output is correct
46 Correct 382 ms 757624 KB Output is correct
47 Correct 374 ms 757496 KB Output is correct
48 Correct 378 ms 757496 KB Output is correct
49 Correct 385 ms 757496 KB Output is correct
50 Correct 410 ms 757500 KB Output is correct
51 Correct 374 ms 757624 KB Output is correct
52 Correct 383 ms 757500 KB Output is correct
53 Correct 374 ms 757496 KB Output is correct
54 Correct 373 ms 757576 KB Output is correct
55 Correct 372 ms 757496 KB Output is correct
56 Correct 371 ms 757500 KB Output is correct
57 Correct 374 ms 757496 KB Output is correct
58 Execution timed out 507 ms 757624 KB Time limit exceeded
59 Halted 0 ms 0 KB -