oj.uz

Submission #598885

# Submission time Handle Problem Language Result Execution time Memory
598885 2022-07-19T07:10:21 Z radal Event Hopping (BOI22_events) C++17
100 / 100
 143 ms 15056 KB 
#include <bits/stdc++.h>
//#pragma GCC target("sse,sse2,avx2")
#pragma GCC optimize("unroll-loops,O3")
#define rep(i,l,r) for (int i = l; i < r; i++)
#define repr(i,r,l) for (int i = r; i >= l; i--)
#define X first
#define Y second
#define all(x) (x).begin() , (x).end()
#define pb push_back
#define endl '\n'
#define debug(x) cerr << #x << " : " << x << endl;
using namespace std;
typedef long long ll;
typedef long double ld;
typedef pair<int,int> pll;
constexpr int N = 1e5+20,mod = 1e9+7,inf = 1e9+10,sq = 500;
inline int mkay(int a,int b){
    if (a+b >= mod) return a+b-mod;
    if (a+b < 0) return a+b+mod;
    return a+b;
}
 
inline int poww(int a,int k){
    if (k < 0) return 0;
    int z = 1;
    while (k){
        if (k&1) z = 1ll*z*a%mod;
        a = 1ll*a*a%mod;
        k >>= 1;
    } 
    return z; 
}
int s[N],e[N],sp[N][20],seg[N*4];
vector<pll> ve;
bool cmp(pll i,pll j){
    if (e[i.Y] == e[j.Y]) return (s[i.Y] < s[j.Y]);
    return (e[i.Y] < e[j.Y]);
}
void build(int l,int r,int v = 1){
    if (r-l == 1){
        seg[v] = ve[l].Y;
        return;
    }
    int u = (v << 1),m = (l+r) >> 1;
    build(l,m,u);
    build(m,r,u|1);
    if (s[seg[u]] < s[seg[u|1]]) seg[v] = seg[u];
    else seg[v] = seg[u|1];
}
int que(int l,int r,int S,int E,int v = 1){
    if (S == l && r == E) return seg[v];
    int m = (l+r) >> 1,u = (v << 1);
    if (E <= m) return que(l,m,S,E,u);
    if (S >= m) return que(m,r,S,E,u|1);
    int x = que(l,m,S,m,u),y = que(m,r,m,E,u|1);
    if (s[x] < s[y]) return x;
    return y;
}
int main(){
    ios :: sync_with_stdio(0); cin.tie(0);
    int n,q;
    cin >> n >> q;
    rep(i,1,n+1){
        cin >> s[i] >> e[i];
        ve.pb({e[i],i});
    }
    sort(all(ve),cmp);
    build(0,n,1);
    rep(i,0,n){
        int j = ve[i].Y;
        int ind = lower_bound(all(ve),make_pair(s[j],0))-ve.begin();
        sp[j][0] = que(0,n,ind,i+1,1);
    }
    rep(j,1,20){
        rep(i,1,n+1){
            sp[i][j] = sp[sp[i][j-1]][j-1];
        }
    }
    while (q--){
        int a,b;
        cin >> a >> b;
        if (a == b){
            cout << 0 << endl;
            continue;
        }
        if (e[a] > e[b] || s[sp[b][19]] > s[a]){
            cout << "impossible" << endl;
            continue;
        }
        if (e[a] == e[b]){
            cout << 1 << endl;
            continue;
        }
        int x = 0;
        repr(i,19,0){
            if (s[sp[b][i]] > e[a]){
                x += (1 << i);
                b = sp[b][i];
            }
        }
        x++;
        if (e[a] < s[b]) x++;
        cout << x << endl;
    }
    return 0;
}

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 90 ms 14544 KB Output is correct
3 Correct 95 ms 14552 KB Output is correct
4 Correct 118 ms 14404 KB Output is correct
5 Correct 109 ms 14572 KB Output is correct
6 Correct 98 ms 14548 KB Output is correct
7 Correct 94 ms 14664 KB Output is correct
8 Correct 79 ms 15056 KB Output is correct
9 Correct 78 ms 14876 KB Output is correct
10 Correct 102 ms 14792 KB Output is correct
11 Correct 89 ms 14912 KB Output is correct
12 Correct 66 ms 14152 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 1 ms 468 KB Output is correct
4 Correct 1 ms 368 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 360 KB Output is correct
7 Correct 1 ms 468 KB Output is correct
8 Correct 1 ms 468 KB Output is correct
9 Correct 1 ms 468 KB Output is correct

Subtask #3
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 1 ms 468 KB Output is correct
4 Correct 1 ms 368 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 360 KB Output is correct
7 Correct 1 ms 468 KB Output is correct
8 Correct 1 ms 468 KB Output is correct
9 Correct 1 ms 468 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 0 ms 340 KB Output is correct
12 Correct 2 ms 356 KB Output is correct
13 Correct 1 ms 468 KB Output is correct
14 Correct 1 ms 460 KB Output is correct
15 Correct 1 ms 468 KB Output is correct
16 Correct 1 ms 468 KB Output is correct
17 Correct 1 ms 468 KB Output is correct
18 Correct 1 ms 340 KB Output is correct
19 Correct 30 ms 2364 KB Output is correct
20 Correct 32 ms 2380 KB Output is correct
21 Correct 32 ms 2676 KB Output is correct
22 Correct 27 ms 2636 KB Output is correct
23 Correct 26 ms 2508 KB Output is correct
24 Correct 25 ms 2516 KB Output is correct
25 Correct 26 ms 2152 KB Output is correct

Subtask #4
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 1 ms 468 KB Output is correct
4 Correct 1 ms 368 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 360 KB Output is correct
7 Correct 1 ms 468 KB Output is correct
8 Correct 1 ms 468 KB Output is correct
9 Correct 1 ms 468 KB Output is correct
10 Correct 0 ms 340 KB Output is correct
11 Correct 0 ms 340 KB Output is correct
12 Correct 1 ms 468 KB Output is correct
13 Correct 1 ms 468 KB Output is correct
14 Correct 1 ms 460 KB Output is correct
15 Correct 1 ms 468 KB Output is correct
16 Correct 1 ms 364 KB Output is correct
17 Correct 1 ms 368 KB Output is correct
18 Correct 1 ms 340 KB Output is correct
19 Correct 59 ms 12740 KB Output is correct
20 Correct 55 ms 12008 KB Output is correct
21 Correct 71 ms 12548 KB Output is correct
22 Correct 66 ms 12712 KB Output is correct
23 Correct 56 ms 12600 KB Output is correct
24 Correct 63 ms 12752 KB Output is correct
25 Correct 45 ms 12080 KB Output is correct

Subtask #5
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 83 ms 14496 KB Output is correct
2 Correct 101 ms 14536 KB Output is correct
3 Correct 119 ms 14316 KB Output is correct
4 Correct 75 ms 14768 KB Output is correct
5 Correct 109 ms 14752 KB Output is correct
6 Correct 106 ms 14616 KB Output is correct
7 Correct 109 ms 14552 KB Output is correct
8 Correct 94 ms 14752 KB Output is correct
9 Correct 59 ms 12656 KB Output is correct
10 Correct 97 ms 14220 KB Output is correct
11 Correct 96 ms 14112 KB Output is correct
12 Correct 102 ms 14152 KB Output is correct

Subtask #6
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 90 ms 14544 KB Output is correct
3 Correct 95 ms 14552 KB Output is correct
4 Correct 118 ms 14404 KB Output is correct
5 Correct 109 ms 14572 KB Output is correct
6 Correct 98 ms 14548 KB Output is correct
7 Correct 94 ms 14664 KB Output is correct
8 Correct 79 ms 15056 KB Output is correct
9 Correct 78 ms 14876 KB Output is correct
10 Correct 102 ms 14792 KB Output is correct
11 Correct 89 ms 14912 KB Output is correct
12 Correct 66 ms 14152 KB Output is correct
13 Correct 0 ms 340 KB Output is correct
14 Correct 0 ms 340 KB Output is correct
15 Correct 1 ms 468 KB Output is correct
16 Correct 1 ms 368 KB Output is correct
17 Correct 1 ms 340 KB Output is correct
18 Correct 1 ms 360 KB Output is correct
19 Correct 1 ms 468 KB Output is correct
20 Correct 1 ms 468 KB Output is correct
21 Correct 1 ms 468 KB Output is correct
22 Correct 1 ms 340 KB Output is correct
23 Correct 0 ms 340 KB Output is correct
24 Correct 2 ms 356 KB Output is correct
25 Correct 1 ms 468 KB Output is correct
26 Correct 1 ms 460 KB Output is correct
27 Correct 1 ms 468 KB Output is correct
28 Correct 1 ms 468 KB Output is correct
29 Correct 1 ms 468 KB Output is correct
30 Correct 1 ms 340 KB Output is correct
31 Correct 30 ms 2364 KB Output is correct
32 Correct 32 ms 2380 KB Output is correct
33 Correct 32 ms 2676 KB Output is correct
34 Correct 27 ms 2636 KB Output is correct
35 Correct 26 ms 2508 KB Output is correct
36 Correct 25 ms 2516 KB Output is correct
37 Correct 26 ms 2152 KB Output is correct
38 Correct 0 ms 340 KB Output is correct
39 Correct 0 ms 340 KB Output is correct
40 Correct 1 ms 468 KB Output is correct
41 Correct 1 ms 468 KB Output is correct
42 Correct 1 ms 460 KB Output is correct
43 Correct 1 ms 468 KB Output is correct
44 Correct 1 ms 364 KB Output is correct
45 Correct 1 ms 368 KB Output is correct
46 Correct 1 ms 340 KB Output is correct
47 Correct 59 ms 12740 KB Output is correct
48 Correct 55 ms 12008 KB Output is correct
49 Correct 71 ms 12548 KB Output is correct
50 Correct 66 ms 12712 KB Output is correct
51 Correct 56 ms 12600 KB Output is correct
52 Correct 63 ms 12752 KB Output is correct
53 Correct 45 ms 12080 KB Output is correct
54 Correct 83 ms 14496 KB Output is correct
55 Correct 101 ms 14536 KB Output is correct
56 Correct 119 ms 14316 KB Output is correct
57 Correct 75 ms 14768 KB Output is correct
58 Correct 109 ms 14752 KB Output is correct
59 Correct 106 ms 14616 KB Output is correct
60 Correct 109 ms 14552 KB Output is correct
61 Correct 94 ms 14752 KB Output is correct
62 Correct 59 ms 12656 KB Output is correct
63 Correct 97 ms 14220 KB Output is correct
64 Correct 96 ms 14112 KB Output is correct
65 Correct 102 ms 14152 KB Output is correct
66 Correct 0 ms 340 KB Output is correct
67 Correct 82 ms 14472 KB Output is correct
68 Correct 92 ms 14484 KB Output is correct
69 Correct 143 ms 14480 KB Output is correct
70 Correct 96 ms 14552 KB Output is correct
71 Correct 100 ms 14580 KB Output is correct
72 Correct 100 ms 14616 KB Output is correct
73 Correct 75 ms 14948 KB Output is correct
74 Correct 80 ms 15024 KB Output is correct
75 Correct 103 ms 14836 KB Output is correct
76 Correct 99 ms 14920 KB Output is correct
77 Correct 65 ms 14172 KB Output is correct
78 Correct 0 ms 340 KB Output is correct
79 Correct 1 ms 468 KB Output is correct
80 Correct 1 ms 468 KB Output is correct
81 Correct 1 ms 340 KB Output is correct
82 Correct 1 ms 340 KB Output is correct
83 Correct 1 ms 468 KB Output is correct
84 Correct 1 ms 364 KB Output is correct
85 Correct 1 ms 368 KB Output is correct
86 Correct 32 ms 2368 KB Output is correct
87 Correct 29 ms 2380 KB Output is correct
88 Correct 31 ms 2652 KB Output is correct
89 Correct 28 ms 2720 KB Output is correct
90 Correct 26 ms 2540 KB Output is correct
91 Correct 24 ms 2536 KB Output is correct
92 Correct 26 ms 2212 KB Output is correct
93 Correct 63 ms 12744 KB Output is correct
94 Correct 54 ms 11880 KB Output is correct
95 Correct 64 ms 12652 KB Output is correct
96 Correct 56 ms 12756 KB Output is correct
97 Correct 59 ms 12740 KB Output is correct
98 Correct 63 ms 12812 KB Output is correct
99 Correct 48 ms 12020 KB Output is correct
100 Correct 142 ms 14536 KB Output is correct
101 Correct 113 ms 14628 KB Output is correct
102 Correct 92 ms 14708 KB Output is correct
103 Correct 96 ms 14252 KB Output is correct
104 Correct 112 ms 13844 KB Output is correct
105 Correct 102 ms 14260 KB Output is correct
106 Correct 106 ms 13964 KB Output is correct
107 Correct 117 ms 14116 KB Output is correct
108 Correct 104 ms 14536 KB Output is correct
109 Correct 90 ms 14480 KB Output is correct
110 Correct 109 ms 14548 KB Output is correct
111 Correct 106 ms 14572 KB Output is correct