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Submission #1024260

# Submission time Handle Problem Language Result Execution time Memory
1024260 2024-07-15T20:44:41 Z serifefedartar Fire (BOI24_fire) C++17
100 / 100
 597 ms 95428 KB 
#include <bits/stdc++.h>
using namespace std;

#define fast ios::sync_with_stdio(0);cin.tie(0);
typedef long long ll;
#define f first
#define s second
#define LOGN 20
const ll MOD = 1e9 + 7;
const ll MAXN = 8e5 + 100;

ll N, M;
int s[MAXN], e[MAXN], sg[4*MAXN], lazy[4*MAXN];
int up[LOGN][MAXN], mn = 1e7;
vector<int> cc;
void push(int k, int a, int b) {
    if (lazy[k] != -1) {
        sg[k] = max(sg[k], lazy[k]);
        if (a != b) {
            lazy[2*k] = max(lazy[2*k], lazy[k]);
            lazy[2*k+1] = max(lazy[2*k+1], lazy[k]);
        }
        lazy[k] = -1;
    }
}

void init(int k, int a, int b) {
    if (a == b) {
        sg[k] = a;
        return ;
    }
    init(2*k, a, (a+b)/2);
    init(2*k+1, (a+b)/2+1, b);
    sg[k] = max(sg[2*k], sg[2*k+1]);
}

void update(int k, int a, int b, int q_l, int q_r, int val) {
    push(k, a, b);
    if (b < q_l || a > q_r)
        return ;
    if (q_l <= a && b <= q_r) {
        lazy[k] = val;
        push(k, a, b);
        return ;
    }
    update(2*k, a, (a+b)/2, q_l, q_r, val);
    update(2*k+1, (a+b)/2+1, b, q_l, q_r, val);
    sg[k] = max(sg[2*k], sg[2*k+1]);
}

int query(int k, int a, int b, int plc) {
    push(k, a, b);
    if (b < plc || a > plc)
        return 0;
    if (a == b)
        return sg[k];
    return max(query(2*k, a, (a+b)/2, plc),
                query(2*k+1, (a+b)/2+1, b, plc));
}

void try_i(int node) {
    int now = node;
    int x = 0;
    for (int i = LOGN-1; i >= 0; i--) {
        int y = up[i][now];
        if (cc[y-1] < cc[node-1] + M) {
            now = y;
            x += (1<<i);
        }
    }

    int y = up[0][now];
    if (cc[y-1] >= cc[node-1] + M)
        mn = min(mn, x + 1);
}

int main() {
    fast
    cin >> N >> M;

    for (int i = 1; i <= N; i++) {
        cin >> s[i] >> e[i];
        cc.push_back(s[i]);
        cc.push_back(e[i]);
        cc.push_back(s[i] + M);
        cc.push_back(e[i] + M);
    }
    sort(cc.begin(), cc.end());
    cc.erase(unique(cc.begin(), cc.end()), cc.end());
    int n = cc.size();
    init(1, 0, n);

    for (int i = 1; i <= N; i++) {
        if (s[i] <= e[i]) {
            int x1 = upper_bound(cc.begin(), cc.end(), s[i]) - cc.begin();
            int x2 = upper_bound(cc.begin(), cc.end(), e[i]) - cc.begin();
            int y1 = upper_bound(cc.begin(), cc.end(), s[i] + M) - cc.begin();
            int y2 = upper_bound(cc.begin(), cc.end(), e[i] + M) - cc.begin();
            update(1, 0, n, x1, x2, x2);
            update(1, 0, n, y1, y2, y2);
        } else {
            int x1 = upper_bound(cc.begin(), cc.end(), s[i]) - cc.begin();
            int x2 = upper_bound(cc.begin(), cc.end(), e[i] + M) - cc.begin();
            update(1, 0, n, x1, x2, x2);
        }
    }

    for (int i = 1; i <= n; i++)
        up[0][i] = query(1, 0, n, i);
    for (int i = 1; i < LOGN; i++) {
        for (int j = 1; j <= n; j++)
            up[i][j] = up[i-1][up[i-1][j]];
    }

    for (int i = 1; i <= n; i++)
        try_i(i);

    if (mn == 1e7)
        mn = -1;
    cout << mn << "\n";
}

Subtask #1
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 45400 KB Output is correct
2 Correct 4 ms 45404 KB Output is correct
3 Correct 4 ms 45404 KB Output is correct
4 Correct 4 ms 45404 KB Output is correct
5 Correct 4 ms 45548 KB Output is correct
6 Correct 6 ms 45400 KB Output is correct
7 Correct 4 ms 45404 KB Output is correct
8 Correct 4 ms 45404 KB Output is correct
9 Correct 4 ms 45404 KB Output is correct
10 Correct 4 ms 45404 KB Output is correct
11 Correct 4 ms 45404 KB Output is correct
12 Correct 4 ms 45524 KB Output is correct
13 Correct 5 ms 45404 KB Output is correct
14 Correct 4 ms 45404 KB Output is correct
15 Correct 5 ms 45528 KB Output is correct
16 Correct 5 ms 45404 KB Output is correct
17 Correct 4 ms 45596 KB Output is correct
18 Correct 4 ms 45404 KB Output is correct
19 Correct 4 ms 45612 KB Output is correct
20 Correct 4 ms 45404 KB Output is correct
21 Correct 4 ms 45404 KB Output is correct
22 Correct 4 ms 45404 KB Output is correct
23 Correct 4 ms 45404 KB Output is correct

Subtask #2
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 45400 KB Output is correct
2 Correct 4 ms 45404 KB Output is correct
3 Correct 4 ms 45404 KB Output is correct
4 Correct 4 ms 45404 KB Output is correct
5 Correct 4 ms 45548 KB Output is correct
6 Correct 6 ms 45400 KB Output is correct
7 Correct 4 ms 45404 KB Output is correct
8 Correct 4 ms 45404 KB Output is correct
9 Correct 4 ms 45404 KB Output is correct
10 Correct 4 ms 45404 KB Output is correct
11 Correct 4 ms 45404 KB Output is correct
12 Correct 4 ms 45524 KB Output is correct
13 Correct 5 ms 45404 KB Output is correct
14 Correct 4 ms 45404 KB Output is correct
15 Correct 5 ms 45528 KB Output is correct
16 Correct 5 ms 45404 KB Output is correct
17 Correct 4 ms 45596 KB Output is correct
18 Correct 4 ms 45404 KB Output is correct
19 Correct 4 ms 45612 KB Output is correct
20 Correct 4 ms 45404 KB Output is correct
21 Correct 4 ms 45404 KB Output is correct
22 Correct 4 ms 45404 KB Output is correct
23 Correct 4 ms 45404 KB Output is correct
24 Correct 4 ms 45404 KB Output is correct
25 Correct 4 ms 45524 KB Output is correct
26 Correct 5 ms 45656 KB Output is correct
27 Correct 5 ms 45580 KB Output is correct
28 Correct 5 ms 45552 KB Output is correct
29 Correct 5 ms 45660 KB Output is correct
30 Correct 4 ms 45404 KB Output is correct
31 Correct 4 ms 45404 KB Output is correct
32 Correct 4 ms 45404 KB Output is correct
33 Correct 4 ms 45660 KB Output is correct
34 Correct 4 ms 45404 KB Output is correct
35 Correct 4 ms 45660 KB Output is correct
36 Correct 5 ms 45404 KB Output is correct
37 Correct 4 ms 45660 KB Output is correct
38 Correct 4 ms 45404 KB Output is correct

Subtask #3
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 45400 KB Output is correct
2 Correct 4 ms 45404 KB Output is correct
3 Correct 4 ms 45404 KB Output is correct
4 Correct 4 ms 45404 KB Output is correct
5 Correct 4 ms 45548 KB Output is correct
6 Correct 6 ms 45400 KB Output is correct
7 Correct 4 ms 45404 KB Output is correct
8 Correct 4 ms 45404 KB Output is correct
9 Correct 4 ms 45404 KB Output is correct
10 Correct 4 ms 45404 KB Output is correct
11 Correct 4 ms 45404 KB Output is correct
12 Correct 4 ms 45524 KB Output is correct
13 Correct 5 ms 45404 KB Output is correct
14 Correct 4 ms 45404 KB Output is correct
15 Correct 5 ms 45528 KB Output is correct
16 Correct 5 ms 45404 KB Output is correct
17 Correct 4 ms 45596 KB Output is correct
18 Correct 4 ms 45404 KB Output is correct
19 Correct 4 ms 45612 KB Output is correct
20 Correct 4 ms 45404 KB Output is correct
21 Correct 4 ms 45404 KB Output is correct
22 Correct 4 ms 45404 KB Output is correct
23 Correct 4 ms 45404 KB Output is correct
24 Correct 4 ms 45404 KB Output is correct
25 Correct 4 ms 45524 KB Output is correct
26 Correct 5 ms 45656 KB Output is correct
27 Correct 5 ms 45580 KB Output is correct
28 Correct 5 ms 45552 KB Output is correct
29 Correct 5 ms 45660 KB Output is correct
30 Correct 4 ms 45404 KB Output is correct
31 Correct 4 ms 45404 KB Output is correct
32 Correct 4 ms 45404 KB Output is correct
33 Correct 4 ms 45660 KB Output is correct
34 Correct 4 ms 45404 KB Output is correct
35 Correct 4 ms 45660 KB Output is correct
36 Correct 5 ms 45404 KB Output is correct
37 Correct 4 ms 45660 KB Output is correct
38 Correct 4 ms 45404 KB Output is correct
39 Correct 16 ms 48192 KB Output is correct
40 Correct 12 ms 48160 KB Output is correct
41 Correct 14 ms 48096 KB Output is correct
42 Correct 11 ms 45972 KB Output is correct
43 Correct 10 ms 45916 KB Output is correct
44 Correct 11 ms 45984 KB Output is correct
45 Correct 10 ms 46056 KB Output is correct
46 Correct 12 ms 45916 KB Output is correct
47 Correct 12 ms 48220 KB Output is correct
48 Correct 12 ms 48296 KB Output is correct
49 Correct 11 ms 48220 KB Output is correct
50 Correct 10 ms 46168 KB Output is correct

Subtask #4
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 45400 KB Output is correct
2 Correct 5 ms 45404 KB Output is correct
3 Correct 5 ms 45556 KB Output is correct
4 Correct 4 ms 45404 KB Output is correct
5 Correct 4 ms 45404 KB Output is correct
6 Correct 5 ms 45616 KB Output is correct
7 Correct 4 ms 45404 KB Output is correct
8 Correct 4 ms 45404 KB Output is correct
9 Correct 5 ms 45404 KB Output is correct
10 Correct 4 ms 45660 KB Output is correct
11 Correct 5 ms 45404 KB Output is correct
12 Correct 4 ms 45400 KB Output is correct
13 Correct 4 ms 45404 KB Output is correct
14 Correct 4 ms 45660 KB Output is correct
15 Correct 13 ms 48152 KB Output is correct
16 Correct 10 ms 45912 KB Output is correct
17 Correct 10 ms 45916 KB Output is correct
18 Correct 11 ms 46104 KB Output is correct
19 Correct 12 ms 48216 KB Output is correct
20 Correct 45 ms 51644 KB Output is correct
21 Correct 458 ms 95424 KB Output is correct
22 Correct 470 ms 94652 KB Output is correct
23 Correct 306 ms 84664 KB Output is correct
24 Correct 457 ms 94852 KB Output is correct
25 Correct 369 ms 85436 KB Output is correct
26 Correct 343 ms 85948 KB Output is correct
27 Correct 304 ms 85696 KB Output is correct
28 Correct 425 ms 94692 KB Output is correct

Subtask #5
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 45400 KB Output is correct
2 Correct 4 ms 45404 KB Output is correct
3 Correct 4 ms 45560 KB Output is correct
4 Correct 4 ms 45404 KB Output is correct
5 Correct 4 ms 45556 KB Output is correct
6 Correct 4 ms 45564 KB Output is correct
7 Correct 5 ms 45656 KB Output is correct
8 Correct 4 ms 45660 KB Output is correct
9 Correct 4 ms 45404 KB Output is correct
10 Correct 4 ms 45660 KB Output is correct
11 Correct 4 ms 45404 KB Output is correct
12 Correct 14 ms 48316 KB Output is correct
13 Correct 10 ms 45916 KB Output is correct
14 Correct 11 ms 45916 KB Output is correct
15 Correct 44 ms 51644 KB Output is correct
16 Correct 324 ms 85184 KB Output is correct
17 Correct 551 ms 94800 KB Output is correct
18 Correct 597 ms 94640 KB Output is correct
19 Correct 436 ms 94664 KB Output is correct
20 Correct 360 ms 85456 KB Output is correct

Subtask #6
26.0 / 26.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 45400 KB Output is correct
2 Correct 4 ms 45404 KB Output is correct
3 Correct 4 ms 45404 KB Output is correct
4 Correct 4 ms 45404 KB Output is correct
5 Correct 4 ms 45548 KB Output is correct
6 Correct 6 ms 45400 KB Output is correct
7 Correct 4 ms 45404 KB Output is correct
8 Correct 4 ms 45404 KB Output is correct
9 Correct 4 ms 45404 KB Output is correct
10 Correct 4 ms 45404 KB Output is correct
11 Correct 4 ms 45404 KB Output is correct
12 Correct 4 ms 45524 KB Output is correct
13 Correct 5 ms 45404 KB Output is correct
14 Correct 4 ms 45404 KB Output is correct
15 Correct 5 ms 45528 KB Output is correct
16 Correct 5 ms 45404 KB Output is correct
17 Correct 4 ms 45596 KB Output is correct
18 Correct 4 ms 45404 KB Output is correct
19 Correct 4 ms 45612 KB Output is correct
20 Correct 4 ms 45404 KB Output is correct
21 Correct 4 ms 45404 KB Output is correct
22 Correct 4 ms 45404 KB Output is correct
23 Correct 4 ms 45404 KB Output is correct
24 Correct 4 ms 45404 KB Output is correct
25 Correct 4 ms 45524 KB Output is correct
26 Correct 5 ms 45656 KB Output is correct
27 Correct 5 ms 45580 KB Output is correct
28 Correct 5 ms 45552 KB Output is correct
29 Correct 5 ms 45660 KB Output is correct
30 Correct 4 ms 45404 KB Output is correct
31 Correct 4 ms 45404 KB Output is correct
32 Correct 4 ms 45404 KB Output is correct
33 Correct 4 ms 45660 KB Output is correct
34 Correct 4 ms 45404 KB Output is correct
35 Correct 4 ms 45660 KB Output is correct
36 Correct 5 ms 45404 KB Output is correct
37 Correct 4 ms 45660 KB Output is correct
38 Correct 4 ms 45404 KB Output is correct
39 Correct 16 ms 48192 KB Output is correct
40 Correct 12 ms 48160 KB Output is correct
41 Correct 14 ms 48096 KB Output is correct
42 Correct 11 ms 45972 KB Output is correct
43 Correct 10 ms 45916 KB Output is correct
44 Correct 11 ms 45984 KB Output is correct
45 Correct 10 ms 46056 KB Output is correct
46 Correct 12 ms 45916 KB Output is correct
47 Correct 12 ms 48220 KB Output is correct
48 Correct 12 ms 48296 KB Output is correct
49 Correct 11 ms 48220 KB Output is correct
50 Correct 10 ms 46168 KB Output is correct
51 Correct 4 ms 45400 KB Output is correct
52 Correct 5 ms 45404 KB Output is correct
53 Correct 5 ms 45556 KB Output is correct
54 Correct 4 ms 45404 KB Output is correct
55 Correct 4 ms 45404 KB Output is correct
56 Correct 5 ms 45616 KB Output is correct
57 Correct 4 ms 45404 KB Output is correct
58 Correct 4 ms 45404 KB Output is correct
59 Correct 5 ms 45404 KB Output is correct
60 Correct 4 ms 45660 KB Output is correct
61 Correct 5 ms 45404 KB Output is correct
62 Correct 4 ms 45400 KB Output is correct
63 Correct 4 ms 45404 KB Output is correct
64 Correct 4 ms 45660 KB Output is correct
65 Correct 13 ms 48152 KB Output is correct
66 Correct 10 ms 45912 KB Output is correct
67 Correct 10 ms 45916 KB Output is correct
68 Correct 11 ms 46104 KB Output is correct
69 Correct 12 ms 48216 KB Output is correct
70 Correct 45 ms 51644 KB Output is correct
71 Correct 458 ms 95424 KB Output is correct
72 Correct 470 ms 94652 KB Output is correct
73 Correct 306 ms 84664 KB Output is correct
74 Correct 457 ms 94852 KB Output is correct
75 Correct 369 ms 85436 KB Output is correct
76 Correct 343 ms 85948 KB Output is correct
77 Correct 304 ms 85696 KB Output is correct
78 Correct 425 ms 94692 KB Output is correct
79 Correct 4 ms 45400 KB Output is correct
80 Correct 4 ms 45404 KB Output is correct
81 Correct 4 ms 45560 KB Output is correct
82 Correct 4 ms 45404 KB Output is correct
83 Correct 4 ms 45556 KB Output is correct
84 Correct 4 ms 45564 KB Output is correct
85 Correct 5 ms 45656 KB Output is correct
86 Correct 4 ms 45660 KB Output is correct
87 Correct 4 ms 45404 KB Output is correct
88 Correct 4 ms 45660 KB Output is correct
89 Correct 4 ms 45404 KB Output is correct
90 Correct 14 ms 48316 KB Output is correct
91 Correct 10 ms 45916 KB Output is correct
92 Correct 11 ms 45916 KB Output is correct
93 Correct 44 ms 51644 KB Output is correct
94 Correct 324 ms 85184 KB Output is correct
95 Correct 551 ms 94800 KB Output is correct
96 Correct 597 ms 94640 KB Output is correct
97 Correct 436 ms 94664 KB Output is correct
98 Correct 360 ms 85456 KB Output is correct
99 Correct 467 ms 95428 KB Output is correct
100 Correct 499 ms 94680 KB Output is correct
101 Correct 441 ms 95416 KB Output is correct
102 Correct 434 ms 94612 KB Output is correct
103 Correct 353 ms 85676 KB Output is correct
104 Correct 424 ms 94656 KB Output is correct
105 Correct 325 ms 94400 KB Output is correct