oj.uz

Submission #1002186

# Submission time Handle Problem Language Result Execution time Memory
1002186 2024-06-19T10:47:31 Z LOLOLO Fire (BOI24_fire) C++17
100 / 100
 405 ms 87128 KB 
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
 
#define           f     first
#define           s     second
#define           pb    push_back
#define           ep    emplace
#define           eb    emplace_back
#define           lb    lower_bound
#define           ub    upper_bound
#define       all(x)    x.begin(), x.end()
#define      rall(x)    x.rbegin(), x.rend()
#define   uniquev(v)    sort(all(v)), (v).resize(unique(all(v)) - (v).begin())
#define     mem(f,x)    memset(f , x , sizeof(f))
#define        sz(x)    (ll)(x).size()
#define  __lcm(a, b)    (1ll * ((a) / __gcd((a), (b))) * (b))
#define          mxx    *max_element
#define          mnn    *min_element
#define    cntbit(x)    __builtin_popcountll(x)
#define       len(x)    (int)(x.length())
 
const int N = 4e5 + 10;
const int L = sqrt(N) + 10;
int nxt[N][20], is[N][20];

ll solve() {
    int n, m;
    cin >> n >> m;

    map <int, int> mp;

    vector <pair <int, int>> seg(n);
    for (auto &x : seg) {
        cin >> x.f >> x.s;
        mp[x.s], mp[x.f];
    }

    int timer = 0;
    for (auto &x : mp) {
        timer++;
        x.s = timer;
    }

    for (auto &x : seg) {
        x.f = mp[x.f];
        x.s = mp[x.s];
    }

    sort(all(seg));

    int j = 0, ov = 0, mx = 0;
    for (int i = 1; i <= timer; i++) {
        while (j < sz(seg) && seg[j].f <= i) {
            if (ov) {
                if (seg[j].f > seg[j].s) {
                    mx = max(mx, seg[j].s);
                }
            } else {
                if (seg[j].f > seg[j].s) {
                    ov = 1;
                    mx = seg[j].s;
                } else {
                    mx = max(mx, seg[j].s);
                }
            }
            j++;
        }

        if (mx) {
            nxt[i][0] = mx;
            is[i][0] = ov;
        } else {
            nxt[i][0] = i;
        }
    }

    if (ov) {
        for (int i = 1; i <= mx; i++) {
            if (is[i][0] == 0) {
                nxt[i][0] = max(nxt[i][0], mx);
            }
        }
    }

    for (int j = 1; j < 20; j++) {
        for (int i = 1; i <= timer; i++) {
            nxt[i][j] = nxt[nxt[i][j - 1]][j - 1];
            is[i][j] = is[i][j - 1] | is[nxt[i][j - 1]][j - 1];
        }
    }

    ll ans = 1e18;
    for (auto x : seg) {
        int l = 0, r = 0;
        ll cc = 1;
        if (x.f < x.s) {
            l = x.f, r = x.s;
            for (int j = 19; j >= 0; j--) {
                if (is[r][j] == 0) {
                    r = nxt[r][j];
                    cc = cc + ((ll)1 << j);
                }
            }

            if (is[r][0] == 0)
                continue;

            r = nxt[r][0];
            cc++;
        } else {
            r = x.s, l = x.f;
        }

        for (int j = 19; j >= 0; j--) {
            if (is[r][j] == 0 && nxt[r][j] < l) {
                r = nxt[r][j];
                cc = cc + ((ll)1 << j);
            }
        }

        if (is[r][0] || nxt[r][0] >= l) {
            ans = min(ans, cc + 1);
        }
    }

    if (ans > n)
        return -1;

    return ans;
}
 
int main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
 
 
    int t = 1;
    //cin >> t;
 
    while (t--) {
        cout << solve() << '\n';
    }
 
    return 0;
}

Subtask #1
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 1 ms 356 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 344 KB Output is correct
9 Correct 0 ms 432 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 0 ms 348 KB Output is correct
22 Correct 1 ms 348 KB Output is correct
23 Correct 0 ms 468 KB Output is correct

Subtask #2
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 1 ms 356 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 344 KB Output is correct
9 Correct 0 ms 432 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 0 ms 348 KB Output is correct
22 Correct 1 ms 348 KB Output is correct
23 Correct 0 ms 468 KB Output is correct
24 Correct 1 ms 348 KB Output is correct
25 Correct 0 ms 604 KB Output is correct
26 Correct 1 ms 604 KB Output is correct
27 Correct 0 ms 348 KB Output is correct
28 Correct 0 ms 604 KB Output is correct
29 Correct 1 ms 344 KB Output is correct
30 Correct 0 ms 348 KB Output is correct
31 Correct 0 ms 348 KB Output is correct
32 Correct 0 ms 348 KB Output is correct
33 Correct 0 ms 348 KB Output is correct
34 Correct 0 ms 348 KB Output is correct
35 Correct 0 ms 604 KB Output is correct
36 Correct 0 ms 604 KB Output is correct
37 Correct 0 ms 484 KB Output is correct
38 Correct 1 ms 348 KB Output is correct

Subtask #3
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 1 ms 356 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 344 KB Output is correct
9 Correct 0 ms 432 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 0 ms 348 KB Output is correct
22 Correct 1 ms 348 KB Output is correct
23 Correct 0 ms 468 KB Output is correct
24 Correct 1 ms 348 KB Output is correct
25 Correct 0 ms 604 KB Output is correct
26 Correct 1 ms 604 KB Output is correct
27 Correct 0 ms 348 KB Output is correct
28 Correct 0 ms 604 KB Output is correct
29 Correct 1 ms 344 KB Output is correct
30 Correct 0 ms 348 KB Output is correct
31 Correct 0 ms 348 KB Output is correct
32 Correct 0 ms 348 KB Output is correct
33 Correct 0 ms 348 KB Output is correct
34 Correct 0 ms 348 KB Output is correct
35 Correct 0 ms 604 KB Output is correct
36 Correct 0 ms 604 KB Output is correct
37 Correct 0 ms 484 KB Output is correct
38 Correct 1 ms 348 KB Output is correct
39 Correct 6 ms 2396 KB Output is correct
40 Correct 6 ms 2500 KB Output is correct
41 Correct 5 ms 2392 KB Output is correct
42 Correct 4 ms 1372 KB Output is correct
43 Correct 4 ms 1296 KB Output is correct
44 Correct 4 ms 1628 KB Output is correct
45 Correct 4 ms 1628 KB Output is correct
46 Correct 4 ms 1504 KB Output is correct
47 Correct 5 ms 2396 KB Output is correct
48 Correct 4 ms 2528 KB Output is correct
49 Correct 4 ms 2396 KB Output is correct
50 Correct 4 ms 1588 KB Output is correct

Subtask #4
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 460 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 1 ms 344 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 1 ms 348 KB Output is correct
14 Correct 1 ms 604 KB Output is correct
15 Correct 5 ms 2480 KB Output is correct
16 Correct 4 ms 1372 KB Output is correct
17 Correct 3 ms 1376 KB Output is correct
18 Correct 4 ms 1632 KB Output is correct
19 Correct 5 ms 2400 KB Output is correct
20 Correct 25 ms 2836 KB Output is correct
21 Correct 405 ms 87128 KB Output is correct
22 Correct 394 ms 87124 KB Output is correct
23 Correct 254 ms 45564 KB Output is correct
24 Correct 369 ms 87100 KB Output is correct
25 Correct 224 ms 37632 KB Output is correct
26 Correct 258 ms 46416 KB Output is correct
27 Correct 242 ms 46416 KB Output is correct
28 Correct 360 ms 85348 KB Output is correct

Subtask #5
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 600 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 1 ms 604 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 1 ms 344 KB Output is correct
12 Correct 5 ms 2632 KB Output is correct
13 Correct 4 ms 1372 KB Output is correct
14 Correct 4 ms 1372 KB Output is correct
15 Correct 25 ms 2668 KB Output is correct
16 Correct 256 ms 45396 KB Output is correct
17 Correct 379 ms 87124 KB Output is correct
18 Correct 376 ms 87120 KB Output is correct
19 Correct 384 ms 87120 KB Output is correct
20 Correct 244 ms 45564 KB Output is correct

Subtask #6
26.0 / 26.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 1 ms 356 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 344 KB Output is correct
9 Correct 0 ms 432 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 0 ms 348 KB Output is correct
22 Correct 1 ms 348 KB Output is correct
23 Correct 0 ms 468 KB Output is correct
24 Correct 1 ms 348 KB Output is correct
25 Correct 0 ms 604 KB Output is correct
26 Correct 1 ms 604 KB Output is correct
27 Correct 0 ms 348 KB Output is correct
28 Correct 0 ms 604 KB Output is correct
29 Correct 1 ms 344 KB Output is correct
30 Correct 0 ms 348 KB Output is correct
31 Correct 0 ms 348 KB Output is correct
32 Correct 0 ms 348 KB Output is correct
33 Correct 0 ms 348 KB Output is correct
34 Correct 0 ms 348 KB Output is correct
35 Correct 0 ms 604 KB Output is correct
36 Correct 0 ms 604 KB Output is correct
37 Correct 0 ms 484 KB Output is correct
38 Correct 1 ms 348 KB Output is correct
39 Correct 6 ms 2396 KB Output is correct
40 Correct 6 ms 2500 KB Output is correct
41 Correct 5 ms 2392 KB Output is correct
42 Correct 4 ms 1372 KB Output is correct
43 Correct 4 ms 1296 KB Output is correct
44 Correct 4 ms 1628 KB Output is correct
45 Correct 4 ms 1628 KB Output is correct
46 Correct 4 ms 1504 KB Output is correct
47 Correct 5 ms 2396 KB Output is correct
48 Correct 4 ms 2528 KB Output is correct
49 Correct 4 ms 2396 KB Output is correct
50 Correct 4 ms 1588 KB Output is correct
51 Correct 0 ms 348 KB Output is correct
52 Correct 0 ms 348 KB Output is correct
53 Correct 0 ms 348 KB Output is correct
54 Correct 0 ms 460 KB Output is correct
55 Correct 0 ms 348 KB Output is correct
56 Correct 0 ms 348 KB Output is correct
57 Correct 1 ms 348 KB Output is correct
58 Correct 1 ms 344 KB Output is correct
59 Correct 1 ms 348 KB Output is correct
60 Correct 0 ms 348 KB Output is correct
61 Correct 1 ms 348 KB Output is correct
62 Correct 0 ms 348 KB Output is correct
63 Correct 1 ms 348 KB Output is correct
64 Correct 1 ms 604 KB Output is correct
65 Correct 5 ms 2480 KB Output is correct
66 Correct 4 ms 1372 KB Output is correct
67 Correct 3 ms 1376 KB Output is correct
68 Correct 4 ms 1632 KB Output is correct
69 Correct 5 ms 2400 KB Output is correct
70 Correct 25 ms 2836 KB Output is correct
71 Correct 405 ms 87128 KB Output is correct
72 Correct 394 ms 87124 KB Output is correct
73 Correct 254 ms 45564 KB Output is correct
74 Correct 369 ms 87100 KB Output is correct
75 Correct 224 ms 37632 KB Output is correct
76 Correct 258 ms 46416 KB Output is correct
77 Correct 242 ms 46416 KB Output is correct
78 Correct 360 ms 85348 KB Output is correct
79 Correct 0 ms 600 KB Output is correct
80 Correct 0 ms 348 KB Output is correct
81 Correct 0 ms 348 KB Output is correct
82 Correct 0 ms 348 KB Output is correct
83 Correct 0 ms 348 KB Output is correct
84 Correct 0 ms 348 KB Output is correct
85 Correct 0 ms 348 KB Output is correct
86 Correct 1 ms 604 KB Output is correct
87 Correct 0 ms 348 KB Output is correct
88 Correct 0 ms 348 KB Output is correct
89 Correct 1 ms 344 KB Output is correct
90 Correct 5 ms 2632 KB Output is correct
91 Correct 4 ms 1372 KB Output is correct
92 Correct 4 ms 1372 KB Output is correct
93 Correct 25 ms 2668 KB Output is correct
94 Correct 256 ms 45396 KB Output is correct
95 Correct 379 ms 87124 KB Output is correct
96 Correct 376 ms 87120 KB Output is correct
97 Correct 384 ms 87120 KB Output is correct
98 Correct 244 ms 45564 KB Output is correct
99 Correct 331 ms 87120 KB Output is correct
100 Correct 368 ms 87120 KB Output is correct
101 Correct 346 ms 87124 KB Output is correct
102 Correct 362 ms 87020 KB Output is correct
103 Correct 250 ms 46544 KB Output is correct
104 Correct 310 ms 83120 KB Output is correct
105 Correct 207 ms 85840 KB Output is correct