oj.uz

Submission #528423

# Submission time Handle Problem Language Result Execution time Memory
528423 2022-02-20T09:12:01 Z N1NT3NDO Osumnjičeni (COCI21_osumnjiceni) C++14
40 / 110
 1000 ms 30580 KB 
#include <bits/stdc++.h>
#define ll long long
#define pb push_back
//#include <ext/pb_ds/assoc_container.hpp>
//#include <ext/pb_ds/tree_policy.hpp>
#define sz(x) (int)x.size()
#define fi first
#define sd second
#define all(x) x.begin(), x.end()
//#pragma GCC target ("avx2")
//#pragma GCC optimization ("O3")
//#pragma GCC optimization ("unroll-loops")

using namespace std;
//using namespace __gnu_pbds;

//typedef tree<int, null_type, less<int>, rb_tree_tag, tree_order_statistics_node_update> ordered_set;

const int N = (int)2e5 + 5;
int n, l[N], r[N], q, nxt[N], mn[N][22], lg[N], t[8 * N], mod[8 * N], mx;
vector<int> vec;

bool intersect(const pair<int, int> &a, const pair<int, int> &b)
{
    int L = max(a.fi, b.fi);
    int R = min(a.sd, b.sd);
    return R >= L;
}

int get(int l, int r)
{
    int t = lg[r - l + 1];
    return min(mn[l][t], mn[r - (1 << t) + 1][t]);
}

void push(int v, int tl, int tr)
{
    if (tl == tr) return;
    mod[v + v] = min(mod[v + v], mod[v]);
    mod[v + v + 1] = min(mod[v + v + 1], mod[v]);
    t[v + v] = min(t[v + v], mod[v]);
    t[v + v + 1] = min(t[v + v + 1], mod[v]);
}

void build(int v, int tl, int tr)
{
    if (tl == tr)
    {
        t[v] = n + 1;
        mod[v] = n + 1;
        return;
    }

    int m = (tl + tr) >> 1;
    build(v + v, tl, m);
    build(v + v + 1, m + 1, tr);
    t[v] = min(t[v + v], t[v + v + 1]);
    mod[v] = n + 1;
}

int get(int v, int tl, int tr, int l, int r)
{
    push(v, tl, tr);
    if (tl > tr || tl > r || tr < l) return n + 1;

    if (tl >= l && tr <= r)
      return t[v];

    //push(v, tl, tr);
    int m = (tl + tr) >> 1;
    return min(get(v + v, tl, m, l, r), get(v + v + 1, m + 1, tr, l, r));
}

void upd(int v, int tl, int tr, int l, int r, int val)
{
    push(v, tl, tr);
    if (tl > tr || tl > r || tr < l) return;

    if (tl >= l && tr <= r)
    {
        t[v] = min(t[v], val);
        mod[v] = min(mod[v], val);
        //push(v, tl, tr);
        return;
    }

    int m = (tl + tr) >> 1;
    //push(v, tl, tr);
    upd(v + v, tl, m, l, r, val);
    upd(v + v + 1, m + 1, tr, l, r, val);
    t[v] = min(t[v + v], t[v + v + 1]);
}

int main()
{
    ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
    cin >> n;
    lg[1] = 0;
    for(int i = 2; i <= n; i++) lg[i] = lg[i / 2] + 1;
    for(int i = 1; i <= n; i++)
    {
        cin >> l[i] >> r[i];
        vec.pb(l[i]);
        vec.pb(r[i]);
    }

    sort(all(vec));
    vec.erase(unique(all(vec)), vec.end());
    for(int i = 1; i <= n; i++)
    {
        l[i] = lower_bound(all(vec), l[i]) - vec.begin(); l[i]++;
        r[i] = lower_bound(all(vec), r[i]) - vec.begin(); r[i]++;
        mx = max(mx, l[i]);
        mx = max(mx, r[i]);
    }

    build(1, 1, mx);
    for(int i = n; i >= 1; i--)
    {

        int val = get(1, 1, mx, l[i], r[i]);
        nxt[i] = val;

        mn[i][0] = nxt[i];
        upd(1, 1, mx, l[i], r[i], i);
    }

    for(int i = 1; (1 << i) <= n; i++)
    {
        for(int j = 1; j + (1 << i) - 1 <= n; j++)
          mn[j][i] = min(mn[j][i - 1], mn[j + (1 << (i - 1))][i - 1]);
    }

    for(int i = 1; i <= n; i++) nxt[i] = get(i, nxt[i] - 1);

    cin >> q;
    while(q--)
    {
        int le, ri;
        cin >> le >> ri;
        int i = le, ans = 0;
        while(i <= ri)
        {
            i = nxt[i];
            ans++;
        }

        cout << ans << '\n';
    }
}

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 469 ms 29724 KB Output is correct
2 Correct 405 ms 29244 KB Output is correct
3 Correct 415 ms 29432 KB Output is correct
4 Correct 420 ms 29496 KB Output is correct
5 Correct 446 ms 30440 KB Output is correct
6 Correct 74 ms 20276 KB Output is correct
7 Correct 78 ms 20572 KB Output is correct
8 Correct 84 ms 20792 KB Output is correct
9 Correct 92 ms 21304 KB Output is correct
10 Correct 100 ms 20648 KB Output is correct
11 Correct 316 ms 30104 KB Output is correct
12 Correct 296 ms 28844 KB Output is correct
13 Correct 293 ms 28644 KB Output is correct
14 Correct 300 ms 30180 KB Output is correct
15 Correct 305 ms 29540 KB Output is correct
16 Correct 0 ms 332 KB Output is correct
17 Correct 76 ms 21700 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 23 ms 1228 KB Output is correct
2 Correct 20 ms 1220 KB Output is correct
3 Correct 18 ms 1208 KB Output is correct
4 Correct 19 ms 1228 KB Output is correct
5 Correct 19 ms 1208 KB Output is correct
6 Correct 19 ms 972 KB Output is correct
7 Correct 16 ms 952 KB Output is correct
8 Correct 12 ms 972 KB Output is correct
9 Correct 9 ms 844 KB Output is correct
10 Correct 8 ms 844 KB Output is correct
11 Correct 6 ms 1228 KB Output is correct
12 Correct 6 ms 1100 KB Output is correct
13 Correct 6 ms 1100 KB Output is correct
14 Correct 9 ms 1192 KB Output is correct
15 Correct 6 ms 1228 KB Output is correct
16 Correct 0 ms 332 KB Output is correct
17 Correct 50 ms 956 KB Output is correct

Subtask #3
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 23 ms 1228 KB Output is correct
2 Correct 20 ms 1220 KB Output is correct
3 Correct 18 ms 1208 KB Output is correct
4 Correct 19 ms 1228 KB Output is correct
5 Correct 19 ms 1208 KB Output is correct
6 Correct 19 ms 972 KB Output is correct
7 Correct 16 ms 952 KB Output is correct
8 Correct 12 ms 972 KB Output is correct
9 Correct 9 ms 844 KB Output is correct
10 Correct 8 ms 844 KB Output is correct
11 Correct 6 ms 1228 KB Output is correct
12 Correct 6 ms 1100 KB Output is correct
13 Correct 6 ms 1100 KB Output is correct
14 Correct 9 ms 1192 KB Output is correct
15 Correct 6 ms 1228 KB Output is correct
16 Correct 0 ms 332 KB Output is correct
17 Correct 50 ms 956 KB Output is correct
18 Correct 528 ms 2128 KB Output is correct
19 Correct 474 ms 2148 KB Output is correct
20 Correct 537 ms 2236 KB Output is correct
21 Correct 501 ms 2072 KB Output is correct
22 Correct 487 ms 2144 KB Output is correct
23 Correct 612 ms 1840 KB Output is correct
24 Correct 463 ms 1888 KB Output is correct
25 Correct 371 ms 1772 KB Output is correct
26 Correct 289 ms 1860 KB Output is correct
27 Correct 228 ms 1704 KB Output is correct
28 Correct 42 ms 1604 KB Output is correct
29 Correct 43 ms 1596 KB Output is correct
30 Correct 44 ms 1596 KB Output is correct
31 Correct 54 ms 1588 KB Output is correct
32 Correct 47 ms 1668 KB Output is correct
33 Correct 1 ms 332 KB Output is correct
34 Execution timed out 1081 ms 1484 KB Time limit exceeded
35 Halted 0 ms 0 KB -

Subtask #4
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 504 ms 30556 KB Output is correct
2 Correct 451 ms 30152 KB Output is correct
3 Correct 394 ms 28616 KB Output is correct
4 Correct 490 ms 28420 KB Output is correct
5 Correct 413 ms 29068 KB Output is correct
6 Correct 84 ms 20408 KB Output is correct
7 Correct 90 ms 20276 KB Output is correct
8 Correct 89 ms 20492 KB Output is correct
9 Correct 98 ms 20152 KB Output is correct
10 Correct 105 ms 21944 KB Output is correct
11 Correct 275 ms 28588 KB Output is correct
12 Correct 376 ms 30580 KB Output is correct
13 Correct 267 ms 28584 KB Output is correct
14 Correct 314 ms 29084 KB Output is correct
15 Correct 309 ms 30356 KB Output is correct
16 Correct 0 ms 332 KB Output is correct
17 Correct 107 ms 20876 KB Output is correct

Subtask #5
0 / 50.0

# Verdict Execution time Memory Grader output
1 Correct 469 ms 29724 KB Output is correct
2 Correct 405 ms 29244 KB Output is correct
3 Correct 415 ms 29432 KB Output is correct
4 Correct 420 ms 29496 KB Output is correct
5 Correct 446 ms 30440 KB Output is correct
6 Correct 74 ms 20276 KB Output is correct
7 Correct 78 ms 20572 KB Output is correct
8 Correct 84 ms 20792 KB Output is correct
9 Correct 92 ms 21304 KB Output is correct
10 Correct 100 ms 20648 KB Output is correct
11 Correct 316 ms 30104 KB Output is correct
12 Correct 296 ms 28844 KB Output is correct
13 Correct 293 ms 28644 KB Output is correct
14 Correct 300 ms 30180 KB Output is correct
15 Correct 305 ms 29540 KB Output is correct
16 Correct 0 ms 332 KB Output is correct
17 Correct 76 ms 21700 KB Output is correct
18 Correct 23 ms 1228 KB Output is correct
19 Correct 20 ms 1220 KB Output is correct
20 Correct 18 ms 1208 KB Output is correct
21 Correct 19 ms 1228 KB Output is correct
22 Correct 19 ms 1208 KB Output is correct
23 Correct 19 ms 972 KB Output is correct
24 Correct 16 ms 952 KB Output is correct
25 Correct 12 ms 972 KB Output is correct
26 Correct 9 ms 844 KB Output is correct
27 Correct 8 ms 844 KB Output is correct
28 Correct 6 ms 1228 KB Output is correct
29 Correct 6 ms 1100 KB Output is correct
30 Correct 6 ms 1100 KB Output is correct
31 Correct 9 ms 1192 KB Output is correct
32 Correct 6 ms 1228 KB Output is correct
33 Correct 0 ms 332 KB Output is correct
34 Correct 50 ms 956 KB Output is correct
35 Correct 528 ms 2128 KB Output is correct
36 Correct 474 ms 2148 KB Output is correct
37 Correct 537 ms 2236 KB Output is correct
38 Correct 501 ms 2072 KB Output is correct
39 Correct 487 ms 2144 KB Output is correct
40 Correct 612 ms 1840 KB Output is correct
41 Correct 463 ms 1888 KB Output is correct
42 Correct 371 ms 1772 KB Output is correct
43 Correct 289 ms 1860 KB Output is correct
44 Correct 228 ms 1704 KB Output is correct
45 Correct 42 ms 1604 KB Output is correct
46 Correct 43 ms 1596 KB Output is correct
47 Correct 44 ms 1596 KB Output is correct
48 Correct 54 ms 1588 KB Output is correct
49 Correct 47 ms 1668 KB Output is correct
50 Correct 1 ms 332 KB Output is correct
51 Execution timed out 1081 ms 1484 KB Time limit exceeded
52 Halted 0 ms 0 KB -