#pragma GCC optimize("O3,unroll-loops")
#pragma GCC target("avx,popcnt,sse4,abm")
#include <bits/stdc++.h>
using namespace std;
#ifndef WAIMAI
#include "game.h"
#endif
#ifdef WAIMAI
#define debug(HEHE...) cout << "[" << #HEHE << "] : ", dout(HEHE)
void dout() {cout << '\n';}
template<typename T, typename...U>
void dout(T t, U...u) {cout << t << (sizeof...(u) ? ", " : ""), dout(u...);}
#else
#define debug(...) 7122
#endif
#define ll long long
#define Waimai ios::sync_with_stdio(false), cin.tie(0)
#define FOR(x,a,b) for (int x = a, I = b; x <= I; x++)
#define pb emplace_back
#define F first
#define S second
const int SIZE = 3e5 + 5;
int n, k;
int l[SIZE], r[SIZE];
vector<int> adj[SIZE], rev[SIZE];
void init(int N, int K) {
n = N, k = K;
FOR (i, 0, k - 1) l[i] = r[i] = i;
FOR (i, k, n - 1) l[i] = -1, r[i] = k;
}
bool upd(int a, int b) {
if (l[a] >= r[b]) return 1;
int mid = (l[a] + r[a]) >> 1;
if (r[b] <= mid) {
r[a] = mid;
for (int p : adj[a]) if (upd(a, p)) return 1;
for (int p : rev[a]) if (upd(p, a)) return 1;
}
mid = (l[b] + r[b]) >> 1;
if (l[a] > mid) {
l[b] = mid + 1;
for (int p : adj[b]) if (upd(b, p)) return 1;
for (int p : rev[b]) if (upd(p, b)) return 1;
}
return 0;
}
int add_teleporter(int a, int b) {
if (max(a, b) < k && a >= b) return 1;
adj[a].pb(b);
rev[b].pb(a);
return upd(a, b);
}
#ifdef WAIMAI
namespace {
int read_int() {
int x;
if (scanf("%d", &x) != 1) {
fprintf(stderr, "Error while reading input\n");
exit(1);
}
return x;
}
} // namespace
int main() {
int N = read_int();
int M = read_int();
int K = read_int();
std::vector<int> u(M), v(M);
for (int i = 0; i < M; ++i) {
u[i] = read_int();
v[i] = read_int();
}
init(N, K);
int i;
for (i = 0; i < M; ++i) {
int answer = add_teleporter(u[i], v[i]);
if (answer != 0 && answer != 1) {
i = -1;
break;
} else if (answer == 1) {
break;
}
}
printf("%d\n", i);
return 0;
}
#endif
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
9 ms |
14288 KB |
Output is correct |
2 |
Correct |
8 ms |
14292 KB |
Output is correct |
3 |
Correct |
8 ms |
14416 KB |
Output is correct |
4 |
Correct |
8 ms |
14288 KB |
Output is correct |
5 |
Correct |
9 ms |
14288 KB |
Output is correct |
6 |
Correct |
8 ms |
14288 KB |
Output is correct |
7 |
Correct |
9 ms |
14408 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
9 ms |
14288 KB |
Output is correct |
2 |
Correct |
8 ms |
14292 KB |
Output is correct |
3 |
Correct |
8 ms |
14416 KB |
Output is correct |
4 |
Correct |
8 ms |
14288 KB |
Output is correct |
5 |
Correct |
9 ms |
14288 KB |
Output is correct |
6 |
Correct |
8 ms |
14288 KB |
Output is correct |
7 |
Correct |
9 ms |
14408 KB |
Output is correct |
8 |
Correct |
9 ms |
14288 KB |
Output is correct |
9 |
Correct |
8 ms |
14288 KB |
Output is correct |
10 |
Correct |
10 ms |
14288 KB |
Output is correct |
11 |
Correct |
8 ms |
14288 KB |
Output is correct |
12 |
Correct |
8 ms |
14288 KB |
Output is correct |
13 |
Correct |
9 ms |
14288 KB |
Output is correct |
14 |
Correct |
9 ms |
14416 KB |
Output is correct |
15 |
Correct |
9 ms |
14288 KB |
Output is correct |
16 |
Correct |
8 ms |
14416 KB |
Output is correct |
17 |
Correct |
8 ms |
14288 KB |
Output is correct |
18 |
Correct |
10 ms |
14408 KB |
Output is correct |
19 |
Correct |
10 ms |
14408 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
9 ms |
14288 KB |
Output is correct |
2 |
Correct |
8 ms |
14292 KB |
Output is correct |
3 |
Correct |
8 ms |
14416 KB |
Output is correct |
4 |
Correct |
8 ms |
14288 KB |
Output is correct |
5 |
Correct |
9 ms |
14288 KB |
Output is correct |
6 |
Correct |
8 ms |
14288 KB |
Output is correct |
7 |
Correct |
9 ms |
14408 KB |
Output is correct |
8 |
Correct |
9 ms |
14288 KB |
Output is correct |
9 |
Correct |
8 ms |
14288 KB |
Output is correct |
10 |
Correct |
10 ms |
14288 KB |
Output is correct |
11 |
Correct |
8 ms |
14288 KB |
Output is correct |
12 |
Correct |
8 ms |
14288 KB |
Output is correct |
13 |
Correct |
9 ms |
14288 KB |
Output is correct |
14 |
Correct |
9 ms |
14416 KB |
Output is correct |
15 |
Correct |
9 ms |
14288 KB |
Output is correct |
16 |
Correct |
8 ms |
14416 KB |
Output is correct |
17 |
Correct |
8 ms |
14288 KB |
Output is correct |
18 |
Correct |
10 ms |
14408 KB |
Output is correct |
19 |
Correct |
10 ms |
14408 KB |
Output is correct |
20 |
Correct |
9 ms |
14432 KB |
Output is correct |
21 |
Correct |
8 ms |
14288 KB |
Output is correct |
22 |
Correct |
9 ms |
14544 KB |
Output is correct |
23 |
Correct |
9 ms |
14344 KB |
Output is correct |
24 |
Correct |
10 ms |
14544 KB |
Output is correct |
25 |
Correct |
12 ms |
14544 KB |
Output is correct |
26 |
Correct |
11 ms |
14416 KB |
Output is correct |
27 |
Correct |
11 ms |
14416 KB |
Output is correct |
28 |
Correct |
10 ms |
14544 KB |
Output is correct |
29 |
Correct |
10 ms |
14544 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
9 ms |
14288 KB |
Output is correct |
2 |
Correct |
8 ms |
14292 KB |
Output is correct |
3 |
Correct |
8 ms |
14416 KB |
Output is correct |
4 |
Correct |
8 ms |
14288 KB |
Output is correct |
5 |
Correct |
9 ms |
14288 KB |
Output is correct |
6 |
Correct |
8 ms |
14288 KB |
Output is correct |
7 |
Correct |
9 ms |
14408 KB |
Output is correct |
8 |
Correct |
9 ms |
14288 KB |
Output is correct |
9 |
Correct |
8 ms |
14288 KB |
Output is correct |
10 |
Correct |
10 ms |
14288 KB |
Output is correct |
11 |
Correct |
8 ms |
14288 KB |
Output is correct |
12 |
Correct |
8 ms |
14288 KB |
Output is correct |
13 |
Correct |
9 ms |
14288 KB |
Output is correct |
14 |
Correct |
9 ms |
14416 KB |
Output is correct |
15 |
Correct |
9 ms |
14288 KB |
Output is correct |
16 |
Correct |
8 ms |
14416 KB |
Output is correct |
17 |
Correct |
8 ms |
14288 KB |
Output is correct |
18 |
Correct |
10 ms |
14408 KB |
Output is correct |
19 |
Correct |
10 ms |
14408 KB |
Output is correct |
20 |
Correct |
9 ms |
14432 KB |
Output is correct |
21 |
Correct |
8 ms |
14288 KB |
Output is correct |
22 |
Correct |
9 ms |
14544 KB |
Output is correct |
23 |
Correct |
9 ms |
14344 KB |
Output is correct |
24 |
Correct |
10 ms |
14544 KB |
Output is correct |
25 |
Correct |
12 ms |
14544 KB |
Output is correct |
26 |
Correct |
11 ms |
14416 KB |
Output is correct |
27 |
Correct |
11 ms |
14416 KB |
Output is correct |
28 |
Correct |
10 ms |
14544 KB |
Output is correct |
29 |
Correct |
10 ms |
14544 KB |
Output is correct |
30 |
Correct |
25 ms |
15824 KB |
Output is correct |
31 |
Correct |
11 ms |
15040 KB |
Output is correct |
32 |
Correct |
29 ms |
24704 KB |
Output is correct |
33 |
Correct |
29 ms |
16456 KB |
Output is correct |
34 |
Correct |
45 ms |
32760 KB |
Output is correct |
35 |
Correct |
48 ms |
18348 KB |
Output is correct |
36 |
Correct |
45 ms |
16456 KB |
Output is correct |
37 |
Correct |
62 ms |
16436 KB |
Output is correct |
38 |
Correct |
34 ms |
16176 KB |
Output is correct |
39 |
Correct |
44 ms |
16320 KB |
Output is correct |
40 |
Correct |
44 ms |
19072 KB |
Output is correct |
41 |
Correct |
48 ms |
18428 KB |
Output is correct |
42 |
Correct |
62 ms |
19376 KB |
Output is correct |
43 |
Correct |
47 ms |
17956 KB |
Output is correct |
44 |
Correct |
53 ms |
17844 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
9 ms |
14288 KB |
Output is correct |
2 |
Correct |
8 ms |
14292 KB |
Output is correct |
3 |
Correct |
8 ms |
14416 KB |
Output is correct |
4 |
Correct |
8 ms |
14288 KB |
Output is correct |
5 |
Correct |
9 ms |
14288 KB |
Output is correct |
6 |
Correct |
8 ms |
14288 KB |
Output is correct |
7 |
Correct |
9 ms |
14408 KB |
Output is correct |
8 |
Correct |
9 ms |
14288 KB |
Output is correct |
9 |
Correct |
8 ms |
14288 KB |
Output is correct |
10 |
Correct |
10 ms |
14288 KB |
Output is correct |
11 |
Correct |
8 ms |
14288 KB |
Output is correct |
12 |
Correct |
8 ms |
14288 KB |
Output is correct |
13 |
Correct |
9 ms |
14288 KB |
Output is correct |
14 |
Correct |
9 ms |
14416 KB |
Output is correct |
15 |
Correct |
9 ms |
14288 KB |
Output is correct |
16 |
Correct |
8 ms |
14416 KB |
Output is correct |
17 |
Correct |
8 ms |
14288 KB |
Output is correct |
18 |
Correct |
10 ms |
14408 KB |
Output is correct |
19 |
Correct |
10 ms |
14408 KB |
Output is correct |
20 |
Correct |
9 ms |
14432 KB |
Output is correct |
21 |
Correct |
8 ms |
14288 KB |
Output is correct |
22 |
Correct |
9 ms |
14544 KB |
Output is correct |
23 |
Correct |
9 ms |
14344 KB |
Output is correct |
24 |
Correct |
10 ms |
14544 KB |
Output is correct |
25 |
Correct |
12 ms |
14544 KB |
Output is correct |
26 |
Correct |
11 ms |
14416 KB |
Output is correct |
27 |
Correct |
11 ms |
14416 KB |
Output is correct |
28 |
Correct |
10 ms |
14544 KB |
Output is correct |
29 |
Correct |
10 ms |
14544 KB |
Output is correct |
30 |
Correct |
25 ms |
15824 KB |
Output is correct |
31 |
Correct |
11 ms |
15040 KB |
Output is correct |
32 |
Correct |
29 ms |
24704 KB |
Output is correct |
33 |
Correct |
29 ms |
16456 KB |
Output is correct |
34 |
Correct |
45 ms |
32760 KB |
Output is correct |
35 |
Correct |
48 ms |
18348 KB |
Output is correct |
36 |
Correct |
45 ms |
16456 KB |
Output is correct |
37 |
Correct |
62 ms |
16436 KB |
Output is correct |
38 |
Correct |
34 ms |
16176 KB |
Output is correct |
39 |
Correct |
44 ms |
16320 KB |
Output is correct |
40 |
Correct |
44 ms |
19072 KB |
Output is correct |
41 |
Correct |
48 ms |
18428 KB |
Output is correct |
42 |
Correct |
62 ms |
19376 KB |
Output is correct |
43 |
Correct |
47 ms |
17956 KB |
Output is correct |
44 |
Correct |
53 ms |
17844 KB |
Output is correct |
45 |
Correct |
251 ms |
28080 KB |
Output is correct |
46 |
Correct |
18 ms |
17128 KB |
Output is correct |
47 |
Correct |
14 ms |
17104 KB |
Output is correct |
48 |
Correct |
361 ms |
47560 KB |
Output is correct |
49 |
Correct |
250 ms |
35620 KB |
Output is correct |
50 |
Correct |
652 ms |
144176 KB |
Output is correct |
51 |
Correct |
981 ms |
70124 KB |
Output is correct |
52 |
Correct |
643 ms |
35632 KB |
Output is correct |
53 |
Correct |
869 ms |
35828 KB |
Output is correct |
54 |
Correct |
857 ms |
35528 KB |
Output is correct |
55 |
Correct |
1132 ms |
37156 KB |
Output is correct |
56 |
Correct |
1374 ms |
36068 KB |
Output is correct |
57 |
Correct |
510 ms |
29668 KB |
Output is correct |
58 |
Correct |
491 ms |
29552 KB |
Output is correct |
59 |
Correct |
577 ms |
29596 KB |
Output is correct |
60 |
Correct |
631 ms |
29632 KB |
Output is correct |
61 |
Correct |
851 ms |
29236 KB |
Output is correct |
62 |
Correct |
511 ms |
44232 KB |
Output is correct |
63 |
Correct |
439 ms |
40808 KB |
Output is correct |
64 |
Correct |
1283 ms |
76504 KB |
Output is correct |
65 |
Correct |
617 ms |
49024 KB |
Output is correct |
66 |
Correct |
531 ms |
34348 KB |
Output is correct |
67 |
Correct |
942 ms |
70596 KB |
Output is correct |
68 |
Correct |
260 ms |
26368 KB |
Output is correct |
69 |
Correct |
61 ms |
20268 KB |
Output is correct |
70 |
Correct |
934 ms |
44668 KB |
Output is correct |
71 |
Correct |
321 ms |
29260 KB |
Output is correct |
72 |
Correct |
230 ms |
25012 KB |
Output is correct |
73 |
Correct |
701 ms |
44376 KB |
Output is correct |
74 |
Correct |
1598 ms |
35680 KB |
Output is correct |
75 |
Correct |
1117 ms |
49576 KB |
Output is correct |
76 |
Correct |
1218 ms |
58060 KB |
Output is correct |