oj.uz

Submission #777285

# Submission time Handle Problem Language Result Execution time Memory
777285 2023-07-09T01:44:31 Z Cookie Event Hopping (BOI22_events) C++14
100 / 100
 164 ms 41036 KB 
#include<bits/stdc++.h>
#include<fstream>
using namespace std;
ifstream fin("WINTER.inp");
ofstream fout("WINTER.out");
#define sz(v) (int)v.size()
#define ll long long
#define pb push_back
#define forr(i, a, b) for(int i = a; i < b; i++)
#define dorr(i, a, b) for(int i = a; i >= b; i--)
#define ld long double
#define vt vector
#include<fstream>
#define fi first
#define se second
#define pll pair<ll, ll>
#define pii pair<int, int>
const ld PI = 3.14159265359;
const int x[4] = {1, -1, 0, 0};
const int y[4] = {0, 0, 1, -1};
const ll mod = 1e9 + 7;
const int mxn = 2e5 + 5, mxm = 1e5, sq = 400;
const int base = (1 << 18);
const ll inf = 1e9;
const ld pre = 1e-6;
struct th{
    int s, e, id;
    bool operator <(const th &b){
        return(s < b.s);
    }
};
int n, q;
vt<int>comp;
int find(int x){
    return(lower_bound(comp.begin(), comp.end(), x) - comp.begin());
}
pii up[mxn + 1][18];
int pref[mxn + 1][17], s[mxn + 1], e[mxn + 1];
pii get(int l, int r){
    int lg = __lg(r - l + 1);
    return(min(up[l][lg], up[r - (1 << lg) + 1][lg]));
}
signed main(){
    ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
    cin >> n >> q;
    for(int i = 1; i <= n; i++){
        cin >> s[i] >> e[i];
        comp.pb(s[i]); comp.pb(e[i]); 
    }
    sort(comp.begin(), comp.end());
    for(int i = 0; i < sz(comp); i++){
        up[i][0] = make_pair(inf, 0);
    }
    for(int i = 1; i <= n; i++){
        up[find(e[i])][0] = min(up[find(e[i])][0], make_pair(s[i], i));
    }
    for(int i = 1; i < 18; i++){
        for(int j = 0; j + (1 << i) - 1 < sz(comp); j++){
            up[j][i] = min(up[j][i - 1], up[j + (1 << (i - 1))][i - 1]);
        }
    }
    for(int i = 1; i <= n; i++){
        pref[i][0] = get(find(s[i]), find(e[i])).se;
        
    }
    for(int i = 1; i < 17; i++){
        for(int j = 1; j <= n; j++){
            pref[j][i] = pref[pref[j][i - 1]][i - 1];
        }
    }
    for(int i = 0; i < q; i++){
        int l, r; cin >> l >> r;
        if(l == r){
            cout << 0 << "\n";
        }else if(s[r] <= e[l]){
            if(e[r] >= e[l]){
                cout << 1 << "\n";
            }else{
                cout << "impossible" << "\n";
            }
        }else{
            int ans = 0;
            for(int i = 16; i >= 0; i--){
                int id = pref[r][i];
                
                if(s[id] > e[l]){
                    ans += (1 << i); r = pref[r][i];
                }
            }
            
            r = pref[r][0];
            
            if(s[r] <= e[l] && e[r] >= e[l]){
                cout << ans + 2 << "\n";
            }else{
                cout << "impossible" << "\n";
            }
        }
        
    }
    return(0);
}

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 126 ms 37404 KB Output is correct
3 Correct 132 ms 37392 KB Output is correct
4 Correct 158 ms 37424 KB Output is correct
5 Correct 141 ms 37420 KB Output is correct
6 Correct 148 ms 37432 KB Output is correct
7 Correct 138 ms 37516 KB Output is correct
8 Correct 129 ms 37996 KB Output is correct
9 Correct 131 ms 41036 KB Output is correct
10 Correct 138 ms 40944 KB Output is correct
11 Correct 136 ms 40984 KB Output is correct
12 Correct 91 ms 40224 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 724 KB Output is correct
4 Correct 1 ms 724 KB Output is correct
5 Correct 1 ms 724 KB Output is correct
6 Correct 1 ms 724 KB Output is correct
7 Correct 1 ms 724 KB Output is correct
8 Correct 1 ms 724 KB Output is correct
9 Correct 1 ms 724 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 724 KB Output is correct
4 Correct 1 ms 724 KB Output is correct
5 Correct 1 ms 724 KB Output is correct
6 Correct 1 ms 724 KB Output is correct
7 Correct 1 ms 724 KB Output is correct
8 Correct 1 ms 724 KB Output is correct
9 Correct 1 ms 724 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 724 KB Output is correct
13 Correct 1 ms 724 KB Output is correct
14 Correct 1 ms 724 KB Output is correct
15 Correct 1 ms 724 KB Output is correct
16 Correct 1 ms 724 KB Output is correct
17 Correct 1 ms 724 KB Output is correct
18 Correct 1 ms 724 KB Output is correct
19 Correct 26 ms 2704 KB Output is correct
20 Correct 24 ms 2692 KB Output is correct
21 Correct 27 ms 2892 KB Output is correct
22 Correct 22 ms 3044 KB Output is correct
23 Correct 20 ms 2868 KB Output is correct
24 Correct 20 ms 2772 KB Output is correct
25 Correct 26 ms 2580 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 724 KB Output is correct
4 Correct 1 ms 724 KB Output is correct
5 Correct 1 ms 724 KB Output is correct
6 Correct 1 ms 724 KB Output is correct
7 Correct 1 ms 724 KB Output is correct
8 Correct 1 ms 724 KB Output is correct
9 Correct 1 ms 724 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 724 KB Output is correct
13 Correct 1 ms 724 KB Output is correct
14 Correct 1 ms 724 KB Output is correct
15 Correct 1 ms 724 KB Output is correct
16 Correct 1 ms 724 KB Output is correct
17 Correct 1 ms 724 KB Output is correct
18 Correct 1 ms 724 KB Output is correct
19 Correct 109 ms 36740 KB Output is correct
20 Correct 104 ms 36800 KB Output is correct
21 Correct 125 ms 36740 KB Output is correct
22 Correct 121 ms 38828 KB Output is correct
23 Correct 115 ms 38752 KB Output is correct
24 Correct 112 ms 38784 KB Output is correct
25 Correct 67 ms 38056 KB Output is correct

Subtask #5
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 126 ms 37408 KB Output is correct
2 Correct 130 ms 37464 KB Output is correct
3 Correct 164 ms 37392 KB Output is correct
4 Correct 135 ms 38000 KB Output is correct
5 Correct 138 ms 37772 KB Output is correct
6 Correct 145 ms 37508 KB Output is correct
7 Correct 139 ms 37516 KB Output is correct
8 Correct 135 ms 37680 KB Output is correct
9 Correct 115 ms 36836 KB Output is correct
10 Correct 131 ms 37256 KB Output is correct
11 Correct 156 ms 37012 KB Output is correct
12 Correct 132 ms 37192 KB Output is correct

Subtask #6
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 126 ms 37404 KB Output is correct
3 Correct 132 ms 37392 KB Output is correct
4 Correct 158 ms 37424 KB Output is correct
5 Correct 141 ms 37420 KB Output is correct
6 Correct 148 ms 37432 KB Output is correct
7 Correct 138 ms 37516 KB Output is correct
8 Correct 129 ms 37996 KB Output is correct
9 Correct 131 ms 41036 KB Output is correct
10 Correct 138 ms 40944 KB Output is correct
11 Correct 136 ms 40984 KB Output is correct
12 Correct 91 ms 40224 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 724 KB Output is correct
16 Correct 1 ms 724 KB Output is correct
17 Correct 1 ms 724 KB Output is correct
18 Correct 1 ms 724 KB Output is correct
19 Correct 1 ms 724 KB Output is correct
20 Correct 1 ms 724 KB Output is correct
21 Correct 1 ms 724 KB Output is correct
22 Correct 0 ms 340 KB Output is correct
23 Correct 0 ms 340 KB Output is correct
24 Correct 1 ms 724 KB Output is correct
25 Correct 1 ms 724 KB Output is correct
26 Correct 1 ms 724 KB Output is correct
27 Correct 1 ms 724 KB Output is correct
28 Correct 1 ms 724 KB Output is correct
29 Correct 1 ms 724 KB Output is correct
30 Correct 1 ms 724 KB Output is correct
31 Correct 26 ms 2704 KB Output is correct
32 Correct 24 ms 2692 KB Output is correct
33 Correct 27 ms 2892 KB Output is correct
34 Correct 22 ms 3044 KB Output is correct
35 Correct 20 ms 2868 KB Output is correct
36 Correct 20 ms 2772 KB Output is correct
37 Correct 26 ms 2580 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 724 KB Output is correct
41 Correct 1 ms 724 KB Output is correct
42 Correct 1 ms 724 KB Output is correct
43 Correct 1 ms 724 KB Output is correct
44 Correct 1 ms 724 KB Output is correct
45 Correct 1 ms 724 KB Output is correct
46 Correct 1 ms 724 KB Output is correct
47 Correct 109 ms 36740 KB Output is correct
48 Correct 104 ms 36800 KB Output is correct
49 Correct 125 ms 36740 KB Output is correct
50 Correct 121 ms 38828 KB Output is correct
51 Correct 115 ms 38752 KB Output is correct
52 Correct 112 ms 38784 KB Output is correct
53 Correct 67 ms 38056 KB Output is correct
54 Correct 126 ms 37408 KB Output is correct
55 Correct 130 ms 37464 KB Output is correct
56 Correct 164 ms 37392 KB Output is correct
57 Correct 135 ms 38000 KB Output is correct
58 Correct 138 ms 37772 KB Output is correct
59 Correct 145 ms 37508 KB Output is correct
60 Correct 139 ms 37516 KB Output is correct
61 Correct 135 ms 37680 KB Output is correct
62 Correct 115 ms 36836 KB Output is correct
63 Correct 131 ms 37256 KB Output is correct
64 Correct 156 ms 37012 KB Output is correct
65 Correct 132 ms 37192 KB Output is correct
66 Correct 0 ms 340 KB Output is correct
67 Correct 129 ms 40576 KB Output is correct
68 Correct 138 ms 40496 KB Output is correct
69 Correct 154 ms 40568 KB Output is correct
70 Correct 133 ms 40612 KB Output is correct
71 Correct 153 ms 40572 KB Output is correct
72 Correct 134 ms 40608 KB Output is correct
73 Correct 134 ms 40956 KB Output is correct
74 Correct 142 ms 40960 KB Output is correct
75 Correct 144 ms 40848 KB Output is correct
76 Correct 134 ms 40948 KB Output is correct
77 Correct 93 ms 40312 KB Output is correct
78 Correct 1 ms 340 KB Output is correct
79 Correct 1 ms 724 KB Output is correct
80 Correct 1 ms 736 KB Output is correct
81 Correct 1 ms 724 KB Output is correct
82 Correct 1 ms 724 KB Output is correct
83 Correct 1 ms 724 KB Output is correct
84 Correct 1 ms 740 KB Output is correct
85 Correct 1 ms 740 KB Output is correct
86 Correct 27 ms 3616 KB Output is correct
87 Correct 24 ms 3660 KB Output is correct
88 Correct 27 ms 3948 KB Output is correct
89 Correct 22 ms 4056 KB Output is correct
90 Correct 21 ms 3828 KB Output is correct
91 Correct 21 ms 3880 KB Output is correct
92 Correct 31 ms 3456 KB Output is correct
93 Correct 105 ms 38704 KB Output is correct
94 Correct 103 ms 38012 KB Output is correct
95 Correct 111 ms 38616 KB Output is correct
96 Correct 110 ms 38700 KB Output is correct
97 Correct 111 ms 38804 KB Output is correct
98 Correct 107 ms 38804 KB Output is correct
99 Correct 65 ms 38016 KB Output is correct
100 Correct 164 ms 40688 KB Output is correct
101 Correct 132 ms 40580 KB Output is correct
102 Correct 136 ms 40804 KB Output is correct
103 Correct 132 ms 40256 KB Output is correct
104 Correct 128 ms 40136 KB Output is correct
105 Correct 137 ms 40260 KB Output is correct
106 Correct 132 ms 39968 KB Output is correct
107 Correct 143 ms 39908 KB Output is correct
108 Correct 143 ms 40592 KB Output is correct
109 Correct 131 ms 40596 KB Output is correct
110 Correct 156 ms 40664 KB Output is correct
111 Correct 133 ms 40604 KB Output is correct