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Submission #1042172

# Submission time Handle Problem Language Result Execution time Memory
1042172 2024-08-02T15:40:13 Z KiaRez Event Hopping (BOI22_events) C++17
100 / 100
 603 ms 49872 KB 
/*
    IN THE NAME OF GOD
*/
#include <bits/stdc++.h>

// #pragma GCC target("avx2,bmi,bmi2,lzcnt,popcnt")
// #pragma GCC optimize("O3")
// #pragma GCC optimize("unroll-loops")

using namespace std;

typedef long long ll;
typedef pair<ll, ll> pll;
typedef pair<int, int> pii;
typedef long double ld;

#define F                                      first
#define S                                      second
#define Mp                                     make_pair
#define pb                                     push_back
#define pf                                     push_front
#define size(x)                                ((ll)x.size())
#define all(x)                                 (x).begin(),(x).end()
#define kill(x)		                           cout << x << '\n', exit(0);
#define fuck(x)                                cout << "(" << #x << " , " << x << ")" << endl
#define endl                                   '\n'

const int N = 3e5+23, lg = 17;
ll Mod = 1e9+7; //998244353;

inline ll MOD(ll a, ll mod=Mod) {a%=mod; (a<0)&&(a+=mod); return a;}
inline ll poww(ll a, ll b, ll mod=Mod) {
    ll ans = 1;
    a=MOD(a, mod);
    while (b) {
        if (b & 1) ans = MOD(ans*a, mod);
        b >>= 1;
        a = MOD(a*a, mod);
    }
    return ans;
}

int n, q, rev[N], p[N], s[N], e[N], a[N];
pii seg[lg][N], cte=Mp((int)1e9, (int)-1e9);

bool cmp(int i, int j) {
    return (e[i] < e[j]);
}

void upd(int id, int ind, pii x) {
    while(ind > 0) {
        seg[id][ind].F=min(seg[id][ind].F, x.F);
        seg[id][ind].S=max(seg[id][ind].S, x.S);
        ind /= 2;
    }
}

pii query(int l, int r, int id, int ind=1, int lc=1, int rc=(1<<lg)+1) {
    if(l >= rc || lc >= r) return cte;
    if(lc >= l && rc <= r) return seg[id][ind];
    int mid = (lc + rc)/2;
    pii x = query(l, r, id, 2*ind, lc, mid);
    pii y = query(l, r, id, 2*ind+1, mid, rc);
    return Mp(min(x.F, y.F), max(x.S, y.S));
}

int main () {
	ios_base::sync_with_stdio(false), cin.tie(0);

	cin>>n>>q;
    for(int i=1; i<=n; i++) {
        cin>>s[i]>>e[i]; p[i] = i;
    }
    sort(p+1, p+n+1, cmp);
    for(int i=1; i<=n; i++) rev[p[i]] = i, a[i] = e[p[i]];
    a[n+1] = 2e9;

    for(int i=0; i<lg; i++) fill(seg[i], seg[i]+N, cte);
    for(int i=1; i<=n; i++) {
        int pl=lower_bound(a+1, a+n+2, s[p[i]]) - a;
        int pr=upper_bound(a+1, a+n+2, e[p[i]]) - a - 1;
        // cout<<p[i]<<" ==> "<<pl<<' '<<pr<<endl;
        upd(0, (1<<lg)-1+i, Mp(pl, pr));
    }

    for(int i=1; i<lg; i++) {
        for(int j=1; j<=n; j++) {
            pii tmp = seg[i-1][(1<<lg)-1+j];
            pii res = query(tmp.F, tmp.S+1, i-1);
            upd(i, (1<<lg)-1+j, res);
        }
    }

    for(int v,u,tc=1; tc<=q; tc++) {
        cin>>v>>u;
        if(v == u) {
            cout<<0<<endl; continue;
        }
        v=rev[v], u=rev[u];
        pii now = {u, u}; int ans = 0;
        for(int i=lg-1; i>=0; i--) {
            pii tmp = query(now.F, now.S+1, i);
            if(v < tmp.F || v > tmp.S) {
                ans += (1<<i);
                now = tmp;
            }
        }
        if(ans == (1<<lg) - 1) {
            cout<<"impossible\n"; continue;
        } 
        cout<<ans+1<<endl;
    }

	return 0;
}

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 45656 KB Output is correct
2 Correct 481 ms 49456 KB Output is correct
3 Correct 545 ms 49236 KB Output is correct
4 Correct 544 ms 49464 KB Output is correct
5 Correct 524 ms 49468 KB Output is correct
6 Correct 513 ms 49476 KB Output is correct
7 Correct 494 ms 49492 KB Output is correct
8 Correct 346 ms 49872 KB Output is correct
9 Correct 358 ms 49744 KB Output is correct
10 Correct 491 ms 49748 KB Output is correct
11 Correct 447 ms 49728 KB Output is correct
12 Correct 305 ms 48976 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 45660 KB Output is correct
2 Correct 6 ms 45660 KB Output is correct
3 Correct 8 ms 45796 KB Output is correct
4 Correct 8 ms 45660 KB Output is correct
5 Correct 11 ms 45660 KB Output is correct
6 Correct 7 ms 45808 KB Output is correct
7 Correct 8 ms 45656 KB Output is correct
8 Correct 10 ms 45660 KB Output is correct
9 Correct 7 ms 45752 KB Output is correct

Subtask #3
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 45660 KB Output is correct
2 Correct 6 ms 45660 KB Output is correct
3 Correct 8 ms 45796 KB Output is correct
4 Correct 8 ms 45660 KB Output is correct
5 Correct 11 ms 45660 KB Output is correct
6 Correct 7 ms 45808 KB Output is correct
7 Correct 8 ms 45656 KB Output is correct
8 Correct 10 ms 45660 KB Output is correct
9 Correct 7 ms 45752 KB Output is correct
10 Correct 6 ms 45660 KB Output is correct
11 Correct 5 ms 45752 KB Output is correct
12 Correct 8 ms 45660 KB Output is correct
13 Correct 8 ms 45812 KB Output is correct
14 Correct 8 ms 45776 KB Output is correct
15 Correct 8 ms 45804 KB Output is correct
16 Correct 7 ms 45656 KB Output is correct
17 Correct 7 ms 45660 KB Output is correct
18 Correct 7 ms 45660 KB Output is correct
19 Correct 205 ms 47052 KB Output is correct
20 Correct 243 ms 47168 KB Output is correct
21 Correct 200 ms 47440 KB Output is correct
22 Correct 171 ms 47440 KB Output is correct
23 Correct 158 ms 47448 KB Output is correct
24 Correct 159 ms 47244 KB Output is correct
25 Correct 181 ms 46928 KB Output is correct

Subtask #4
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 45660 KB Output is correct
2 Correct 6 ms 45660 KB Output is correct
3 Correct 8 ms 45796 KB Output is correct
4 Correct 8 ms 45660 KB Output is correct
5 Correct 11 ms 45660 KB Output is correct
6 Correct 7 ms 45808 KB Output is correct
7 Correct 8 ms 45656 KB Output is correct
8 Correct 10 ms 45660 KB Output is correct
9 Correct 7 ms 45752 KB Output is correct
10 Correct 6 ms 45656 KB Output is correct
11 Correct 5 ms 45660 KB Output is correct
12 Correct 8 ms 45660 KB Output is correct
13 Correct 8 ms 45800 KB Output is correct
14 Correct 7 ms 45800 KB Output is correct
15 Correct 8 ms 45656 KB Output is correct
16 Correct 7 ms 45808 KB Output is correct
17 Correct 7 ms 45660 KB Output is correct
18 Correct 7 ms 45660 KB Output is correct
19 Correct 253 ms 47484 KB Output is correct
20 Correct 272 ms 46676 KB Output is correct
21 Correct 199 ms 47620 KB Output is correct
22 Correct 242 ms 47720 KB Output is correct
23 Correct 192 ms 47700 KB Output is correct
24 Correct 238 ms 47700 KB Output is correct
25 Correct 131 ms 47040 KB Output is correct

Subtask #5
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 470 ms 49492 KB Output is correct
2 Correct 524 ms 49492 KB Output is correct
3 Correct 565 ms 49220 KB Output is correct
4 Correct 336 ms 49744 KB Output is correct
5 Correct 494 ms 49744 KB Output is correct
6 Correct 493 ms 49492 KB Output is correct
7 Correct 484 ms 49488 KB Output is correct
8 Correct 543 ms 49720 KB Output is correct
9 Correct 186 ms 47708 KB Output is correct
10 Correct 439 ms 49236 KB Output is correct
11 Correct 372 ms 48952 KB Output is correct
12 Correct 489 ms 49232 KB Output is correct

Subtask #6
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 45656 KB Output is correct
2 Correct 481 ms 49456 KB Output is correct
3 Correct 545 ms 49236 KB Output is correct
4 Correct 544 ms 49464 KB Output is correct
5 Correct 524 ms 49468 KB Output is correct
6 Correct 513 ms 49476 KB Output is correct
7 Correct 494 ms 49492 KB Output is correct
8 Correct 346 ms 49872 KB Output is correct
9 Correct 358 ms 49744 KB Output is correct
10 Correct 491 ms 49748 KB Output is correct
11 Correct 447 ms 49728 KB Output is correct
12 Correct 305 ms 48976 KB Output is correct
13 Correct 6 ms 45660 KB Output is correct
14 Correct 6 ms 45660 KB Output is correct
15 Correct 8 ms 45796 KB Output is correct
16 Correct 8 ms 45660 KB Output is correct
17 Correct 11 ms 45660 KB Output is correct
18 Correct 7 ms 45808 KB Output is correct
19 Correct 8 ms 45656 KB Output is correct
20 Correct 10 ms 45660 KB Output is correct
21 Correct 7 ms 45752 KB Output is correct
22 Correct 6 ms 45660 KB Output is correct
23 Correct 5 ms 45752 KB Output is correct
24 Correct 8 ms 45660 KB Output is correct
25 Correct 8 ms 45812 KB Output is correct
26 Correct 8 ms 45776 KB Output is correct
27 Correct 8 ms 45804 KB Output is correct
28 Correct 7 ms 45656 KB Output is correct
29 Correct 7 ms 45660 KB Output is correct
30 Correct 7 ms 45660 KB Output is correct
31 Correct 205 ms 47052 KB Output is correct
32 Correct 243 ms 47168 KB Output is correct
33 Correct 200 ms 47440 KB Output is correct
34 Correct 171 ms 47440 KB Output is correct
35 Correct 158 ms 47448 KB Output is correct
36 Correct 159 ms 47244 KB Output is correct
37 Correct 181 ms 46928 KB Output is correct
38 Correct 6 ms 45656 KB Output is correct
39 Correct 5 ms 45660 KB Output is correct
40 Correct 8 ms 45660 KB Output is correct
41 Correct 8 ms 45800 KB Output is correct
42 Correct 7 ms 45800 KB Output is correct
43 Correct 8 ms 45656 KB Output is correct
44 Correct 7 ms 45808 KB Output is correct
45 Correct 7 ms 45660 KB Output is correct
46 Correct 7 ms 45660 KB Output is correct
47 Correct 253 ms 47484 KB Output is correct
48 Correct 272 ms 46676 KB Output is correct
49 Correct 199 ms 47620 KB Output is correct
50 Correct 242 ms 47720 KB Output is correct
51 Correct 192 ms 47700 KB Output is correct
52 Correct 238 ms 47700 KB Output is correct
53 Correct 131 ms 47040 KB Output is correct
54 Correct 470 ms 49492 KB Output is correct
55 Correct 524 ms 49492 KB Output is correct
56 Correct 565 ms 49220 KB Output is correct
57 Correct 336 ms 49744 KB Output is correct
58 Correct 494 ms 49744 KB Output is correct
59 Correct 493 ms 49492 KB Output is correct
60 Correct 484 ms 49488 KB Output is correct
61 Correct 543 ms 49720 KB Output is correct
62 Correct 186 ms 47708 KB Output is correct
63 Correct 439 ms 49236 KB Output is correct
64 Correct 372 ms 48952 KB Output is correct
65 Correct 489 ms 49232 KB Output is correct
66 Correct 7 ms 45776 KB Output is correct
67 Correct 522 ms 49468 KB Output is correct
68 Correct 554 ms 49360 KB Output is correct
69 Correct 581 ms 49520 KB Output is correct
70 Correct 554 ms 49496 KB Output is correct
71 Correct 570 ms 49408 KB Output is correct
72 Correct 512 ms 49348 KB Output is correct
73 Correct 344 ms 49744 KB Output is correct
74 Correct 343 ms 49744 KB Output is correct
75 Correct 486 ms 49716 KB Output is correct
76 Correct 510 ms 49788 KB Output is correct
77 Correct 303 ms 49088 KB Output is correct
78 Correct 5 ms 45656 KB Output is correct
79 Correct 10 ms 45656 KB Output is correct
80 Correct 8 ms 45660 KB Output is correct
81 Correct 10 ms 45732 KB Output is correct
82 Correct 8 ms 45660 KB Output is correct
83 Correct 11 ms 45768 KB Output is correct
84 Correct 7 ms 45660 KB Output is correct
85 Correct 8 ms 45656 KB Output is correct
86 Correct 218 ms 47200 KB Output is correct
87 Correct 229 ms 47188 KB Output is correct
88 Correct 207 ms 47440 KB Output is correct
89 Correct 169 ms 47496 KB Output is correct
90 Correct 156 ms 47440 KB Output is correct
91 Correct 156 ms 47440 KB Output is correct
92 Correct 180 ms 46928 KB Output is correct
93 Correct 250 ms 47696 KB Output is correct
94 Correct 253 ms 46676 KB Output is correct
95 Correct 235 ms 47444 KB Output is correct
96 Correct 251 ms 47572 KB Output is correct
97 Correct 192 ms 47464 KB Output is correct
98 Correct 253 ms 47464 KB Output is correct
99 Correct 126 ms 46988 KB Output is correct
100 Correct 488 ms 49488 KB Output is correct
101 Correct 483 ms 49580 KB Output is correct
102 Correct 603 ms 49740 KB Output is correct
103 Correct 472 ms 49232 KB Output is correct
104 Correct 352 ms 48964 KB Output is correct
105 Correct 454 ms 49236 KB Output is correct
106 Correct 458 ms 48724 KB Output is correct
107 Correct 541 ms 48720 KB Output is correct
108 Correct 428 ms 49488 KB Output is correct
109 Correct 374 ms 49588 KB Output is correct
110 Correct 377 ms 49488 KB Output is correct
111 Correct 370 ms 49492 KB Output is correct