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Submission #201034

# Submission time Handle Problem Language Result Execution time Memory
201034 2020-02-09T06:38:53 Z HellAngel JJOOII 2 (JOI20_ho_t2) C++14
100 / 100
 94 ms 48516 KB 
#include <bits/stdc++.h>

using namespace std;

const int maxn = 200007;
string s;
int nxt[20][maxn][3], a[maxn], n, k, ans;

void Jump(int &pos, int type, int cnt)
{
    for(int i = 19; i >= 0; i--)
    {
        if(cnt >= (1 << i))
        {
            cnt -= (1 << i);
            pos = nxt[i][pos][type];
        }
    }
}

int32_t main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    if(fopen("test.inp", "r")) freopen("test.inp", "r", stdin);
    cin >> n >> k >> s;
    ans = n + 1;
    for(int i = 1; i <= n; i++)
    {
        if(s[i - 1] == 'J') a[i] = 0;
        if(s[i - 1] == 'O') a[i] = 1;
        if(s[i - 1] == 'I') a[i] = 2;
    }
    nxt[0][n + 1][0] = nxt[0][n + 1][1] = nxt[0][n + 1][2] = n + 1; 
    for(int i = n; i >= 1; i--)
    {
        for(int j = 0; j < 3; j++) nxt[0][i][j] = nxt[0][i + 1][j]; 
        if(i == n) continue;
        nxt[0][i][a[i + 1]] = i + 1;
    }
    for(int len = 1; len < 20; len++)
    {
        for(int i = 1; i <= n + 1; i++)
        {
            for(int j = 0; j < 3; j++)
            {
                int nlen = (1 << len);
                if(i + nlen - 1 > n) nxt[len][i][j] = 1 + n;
                nxt[len][i][j] = nxt[len - 1][nxt[len - 1][i][j]][j];
            }
        }
    }
    for(int i = 1; i <= n; i++)
    {
        int cur = i;
        if(a[cur] != 0) continue;
        Jump(cur, 0, k - 1);
        Jump(cur, 1, k);
        Jump(cur, 2, k);
        if(cur <= n)
        {
            ans = min(ans, cur - i + 1 - k * 3);
        }
    }
    if(ans == n + 1) cout << -1;
    else cout << ans;
}

Compilation message

ho_t2.cpp: In function 'int32_t main()':
ho_t2.cpp:25:39: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
     if(fopen("test.inp", "r")) freopen("test.inp", "r", stdin);
                                ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
1.0 / 1.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 504 KB Output is correct
2 Correct 5 ms 504 KB Output is correct
3 Correct 5 ms 504 KB Output is correct
4 Correct 5 ms 504 KB Output is correct
5 Correct 5 ms 504 KB Output is correct
6 Correct 5 ms 504 KB Output is correct
7 Correct 5 ms 504 KB Output is correct
8 Correct 5 ms 504 KB Output is correct
9 Correct 5 ms 504 KB Output is correct
10 Correct 5 ms 504 KB Output is correct
11 Correct 5 ms 504 KB Output is correct
12 Correct 5 ms 504 KB Output is correct
13 Correct 5 ms 504 KB Output is correct
14 Correct 5 ms 504 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 504 KB Output is correct
2 Correct 5 ms 504 KB Output is correct
3 Correct 5 ms 504 KB Output is correct
4 Correct 5 ms 504 KB Output is correct
5 Correct 5 ms 504 KB Output is correct
6 Correct 5 ms 504 KB Output is correct
7 Correct 5 ms 504 KB Output is correct
8 Correct 5 ms 504 KB Output is correct
9 Correct 5 ms 504 KB Output is correct
10 Correct 5 ms 504 KB Output is correct
11 Correct 5 ms 504 KB Output is correct
12 Correct 5 ms 504 KB Output is correct
13 Correct 5 ms 504 KB Output is correct
14 Correct 5 ms 504 KB Output is correct
15 Correct 5 ms 1144 KB Output is correct
16 Correct 6 ms 1144 KB Output is correct
17 Correct 6 ms 1272 KB Output is correct
18 Correct 5 ms 888 KB Output is correct
19 Correct 5 ms 1144 KB Output is correct
20 Correct 6 ms 1144 KB Output is correct
21 Correct 6 ms 1144 KB Output is correct
22 Correct 5 ms 1144 KB Output is correct
23 Correct 5 ms 888 KB Output is correct
24 Correct 5 ms 1144 KB Output is correct
25 Correct 6 ms 1148 KB Output is correct
26 Correct 5 ms 1276 KB Output is correct
27 Correct 5 ms 1144 KB Output is correct
28 Correct 6 ms 1272 KB Output is correct
29 Correct 8 ms 1272 KB Output is correct
30 Correct 5 ms 1144 KB Output is correct
31 Correct 5 ms 760 KB Output is correct
32 Correct 5 ms 1148 KB Output is correct
33 Correct 6 ms 1272 KB Output is correct
34 Correct 6 ms 1144 KB Output is correct
35 Correct 5 ms 1144 KB Output is correct

Subtask #3
87.0 / 87.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 504 KB Output is correct
2 Correct 5 ms 504 KB Output is correct
3 Correct 5 ms 504 KB Output is correct
4 Correct 5 ms 504 KB Output is correct
5 Correct 5 ms 504 KB Output is correct
6 Correct 5 ms 504 KB Output is correct
7 Correct 5 ms 504 KB Output is correct
8 Correct 5 ms 504 KB Output is correct
9 Correct 5 ms 504 KB Output is correct
10 Correct 5 ms 504 KB Output is correct
11 Correct 5 ms 504 KB Output is correct
12 Correct 5 ms 504 KB Output is correct
13 Correct 5 ms 504 KB Output is correct
14 Correct 5 ms 504 KB Output is correct
15 Correct 5 ms 1144 KB Output is correct
16 Correct 6 ms 1144 KB Output is correct
17 Correct 6 ms 1272 KB Output is correct
18 Correct 5 ms 888 KB Output is correct
19 Correct 5 ms 1144 KB Output is correct
20 Correct 6 ms 1144 KB Output is correct
21 Correct 6 ms 1144 KB Output is correct
22 Correct 5 ms 1144 KB Output is correct
23 Correct 5 ms 888 KB Output is correct
24 Correct 5 ms 1144 KB Output is correct
25 Correct 6 ms 1148 KB Output is correct
26 Correct 5 ms 1276 KB Output is correct
27 Correct 5 ms 1144 KB Output is correct
28 Correct 6 ms 1272 KB Output is correct
29 Correct 8 ms 1272 KB Output is correct
30 Correct 5 ms 1144 KB Output is correct
31 Correct 5 ms 760 KB Output is correct
32 Correct 5 ms 1148 KB Output is correct
33 Correct 6 ms 1272 KB Output is correct
34 Correct 6 ms 1144 KB Output is correct
35 Correct 5 ms 1144 KB Output is correct
36 Correct 54 ms 45316 KB Output is correct
37 Correct 54 ms 48388 KB Output is correct
38 Correct 54 ms 48388 KB Output is correct
39 Correct 54 ms 48004 KB Output is correct
40 Correct 55 ms 48388 KB Output is correct
41 Correct 56 ms 48388 KB Output is correct
42 Correct 54 ms 48388 KB Output is correct
43 Correct 35 ms 30328 KB Output is correct
44 Correct 41 ms 37636 KB Output is correct
45 Correct 54 ms 48388 KB Output is correct
46 Correct 55 ms 48388 KB Output is correct
47 Correct 56 ms 48388 KB Output is correct
48 Correct 56 ms 48516 KB Output is correct
49 Correct 38 ms 32516 KB Output is correct
50 Correct 55 ms 48384 KB Output is correct
51 Correct 94 ms 48388 KB Output is correct
52 Correct 53 ms 46596 KB Output is correct
53 Correct 57 ms 48388 KB Output is correct
54 Correct 54 ms 48388 KB Output is correct
55 Correct 52 ms 48388 KB Output is correct
56 Correct 54 ms 48388 KB Output is correct