// In The Name Of The God
#include <bits/stdc++.h>
#define f first
#define s second
#define pb push_back
#define pp pop_back
#define all(x) x.begin(), x.end()
#define sz(x) (int)x.size()
#define rep(a, b, c) for (int (a) = (b); (a) <= (c); a++)
#define per(a, b, c) for (int (a) = (b); (a) >= (c); a--)
#define nl '\n'
#define ioi exit(0);
using namespace std;
const int MAX_N = (int)1e5 + 7;
const int K = 100;
const int inf = (int)1e9 + 7;
int n, m, q;
list <int> g[MAX_N];
int T, k;
int tmr;
int a[MAX_N], was[MAX_N], dp[MAX_N], h[MAX_N];
bool ban[MAX_N];
int calc(int v) {
int res = -inf;
if (was[v] == tmr) return dp[v];
was[v] = tmr;
if (!ban[v]) res = 0;
for (auto to : g[v]) {
res = max(res, calc(to) + 1);
}
return dp[v] = res;
}
void read() {
cin >> T >> k;
rep(i, 1, k) {
cin >> a[i];
}
}
void naive() {
rep(i, 1, k) {
ban[a[i]] = 1;
}
++tmr;
int res = calc(T);
if (res < 0) res = -1;
cout << res << nl;
rep(i, 1, k) {
ban[a[i]] = 0;
}
}
int sz[MAX_N], used[MAX_N], pos[MAX_N];
pair <int, int> bfr[MAX_N];
pair <int, int> dist[MAX_N][K];
void pre() {
rep(i, 1, n) {
int S = 0;
bfr[S++] = {0, i};
for (auto to : g[i]) {
for (int j = 0; j < sz[to]; j++) {
auto it = dist[to][j];
if (used[it.s] == i) {
bfr[pos[it.s]].f = max(bfr[pos[it.s]].f, it.f + 1);
continue;
}
pos[it.s] = S;
used[it.s] = i;
bfr[S++] = {it.f + 1, it.s};
}
}
sort(bfr, bfr + S, greater < pair <int, int> > () );
rep(j, 0, S - 1) {
dist[i][sz[i]++] = bfr[j];
if (sz[i] == K) break;
}
}
}
void fast() {
int res = -1;
rep(i, 1, k) {
ban[a[i]] = 1;
}
rep(i, 0, sz[T] - 1) {
if (!ban[dist[T][i].s]) {
res = max(res, dist[T][i].f);
break;
}
}
rep(i, 1, k) {
ban[a[i]] = 0;
}
cout << res << nl;
//cerr << "DA\n";
}
int main() {
ios_base :: sync_with_stdio(0);
cin.tie(0), cout.tie(0);
#ifdef IOI
freopen ("in.txt", "r", stdin);
freopen ("B.out", "w", stdout);
#endif
cin >> n >> m >> q;
rep(i, 1, m) {
int s, e;
cin >> s >> e;
g[e].pb(s);
}
pre();
rep(i, 1, q) {
read();
if (k >= K) naive();
else fast();
}
ioi
}
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
4 ms |
2680 KB |
Output is correct |
2 |
Correct |
4 ms |
2680 KB |
Output is correct |
3 |
Correct |
4 ms |
2780 KB |
Output is correct |
4 |
Correct |
4 ms |
2680 KB |
Output is correct |
5 |
Correct |
7 ms |
3676 KB |
Output is correct |
6 |
Correct |
7 ms |
3576 KB |
Output is correct |
7 |
Correct |
6 ms |
3576 KB |
Output is correct |
8 |
Correct |
6 ms |
3576 KB |
Output is correct |
9 |
Correct |
7 ms |
3704 KB |
Output is correct |
10 |
Correct |
6 ms |
3576 KB |
Output is correct |
11 |
Correct |
7 ms |
3548 KB |
Output is correct |
12 |
Correct |
7 ms |
3576 KB |
Output is correct |
13 |
Correct |
7 ms |
3576 KB |
Output is correct |
14 |
Correct |
7 ms |
3576 KB |
Output is correct |
15 |
Correct |
7 ms |
3548 KB |
Output is correct |
16 |
Correct |
7 ms |
3548 KB |
Output is correct |
17 |
Correct |
7 ms |
3576 KB |
Output is correct |
18 |
Correct |
7 ms |
3548 KB |
Output is correct |
19 |
Correct |
7 ms |
3624 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
4 ms |
2680 KB |
Output is correct |
2 |
Correct |
4 ms |
2680 KB |
Output is correct |
3 |
Correct |
4 ms |
2780 KB |
Output is correct |
4 |
Correct |
4 ms |
2680 KB |
Output is correct |
5 |
Correct |
7 ms |
3676 KB |
Output is correct |
6 |
Correct |
7 ms |
3576 KB |
Output is correct |
7 |
Correct |
6 ms |
3576 KB |
Output is correct |
8 |
Correct |
6 ms |
3576 KB |
Output is correct |
9 |
Correct |
7 ms |
3704 KB |
Output is correct |
10 |
Correct |
6 ms |
3576 KB |
Output is correct |
11 |
Correct |
7 ms |
3548 KB |
Output is correct |
12 |
Correct |
7 ms |
3576 KB |
Output is correct |
13 |
Correct |
7 ms |
3576 KB |
Output is correct |
14 |
Correct |
7 ms |
3576 KB |
Output is correct |
15 |
Correct |
7 ms |
3548 KB |
Output is correct |
16 |
Correct |
7 ms |
3548 KB |
Output is correct |
17 |
Correct |
7 ms |
3576 KB |
Output is correct |
18 |
Correct |
7 ms |
3548 KB |
Output is correct |
19 |
Correct |
7 ms |
3624 KB |
Output is correct |
20 |
Correct |
200 ms |
9840 KB |
Output is correct |
21 |
Correct |
199 ms |
9732 KB |
Output is correct |
22 |
Correct |
206 ms |
9824 KB |
Output is correct |
23 |
Correct |
200 ms |
9856 KB |
Output is correct |
24 |
Correct |
631 ms |
88804 KB |
Output is correct |
25 |
Correct |
643 ms |
88740 KB |
Output is correct |
26 |
Correct |
630 ms |
88688 KB |
Output is correct |
27 |
Correct |
351 ms |
91152 KB |
Output is correct |
28 |
Correct |
351 ms |
91204 KB |
Output is correct |
29 |
Correct |
348 ms |
92328 KB |
Output is correct |
30 |
Correct |
356 ms |
87956 KB |
Output is correct |
31 |
Correct |
438 ms |
88440 KB |
Output is correct |
32 |
Correct |
412 ms |
88204 KB |
Output is correct |
33 |
Correct |
377 ms |
88696 KB |
Output is correct |
34 |
Correct |
541 ms |
88928 KB |
Output is correct |
35 |
Correct |
350 ms |
88648 KB |
Output is correct |
36 |
Correct |
372 ms |
88992 KB |
Output is correct |
37 |
Correct |
562 ms |
88964 KB |
Output is correct |
38 |
Correct |
378 ms |
88860 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
4 ms |
2680 KB |
Output is correct |
2 |
Correct |
4 ms |
2680 KB |
Output is correct |
3 |
Correct |
4 ms |
2780 KB |
Output is correct |
4 |
Correct |
4 ms |
2680 KB |
Output is correct |
5 |
Correct |
7 ms |
3676 KB |
Output is correct |
6 |
Correct |
7 ms |
3576 KB |
Output is correct |
7 |
Correct |
6 ms |
3576 KB |
Output is correct |
8 |
Correct |
6 ms |
3576 KB |
Output is correct |
9 |
Correct |
7 ms |
3704 KB |
Output is correct |
10 |
Correct |
6 ms |
3576 KB |
Output is correct |
11 |
Correct |
7 ms |
3548 KB |
Output is correct |
12 |
Correct |
7 ms |
3576 KB |
Output is correct |
13 |
Correct |
7 ms |
3576 KB |
Output is correct |
14 |
Correct |
7 ms |
3576 KB |
Output is correct |
15 |
Correct |
7 ms |
3548 KB |
Output is correct |
16 |
Correct |
7 ms |
3548 KB |
Output is correct |
17 |
Correct |
7 ms |
3576 KB |
Output is correct |
18 |
Correct |
7 ms |
3548 KB |
Output is correct |
19 |
Correct |
7 ms |
3624 KB |
Output is correct |
20 |
Correct |
200 ms |
9840 KB |
Output is correct |
21 |
Correct |
199 ms |
9732 KB |
Output is correct |
22 |
Correct |
206 ms |
9824 KB |
Output is correct |
23 |
Correct |
200 ms |
9856 KB |
Output is correct |
24 |
Correct |
631 ms |
88804 KB |
Output is correct |
25 |
Correct |
643 ms |
88740 KB |
Output is correct |
26 |
Correct |
630 ms |
88688 KB |
Output is correct |
27 |
Correct |
351 ms |
91152 KB |
Output is correct |
28 |
Correct |
351 ms |
91204 KB |
Output is correct |
29 |
Correct |
348 ms |
92328 KB |
Output is correct |
30 |
Correct |
356 ms |
87956 KB |
Output is correct |
31 |
Correct |
438 ms |
88440 KB |
Output is correct |
32 |
Correct |
412 ms |
88204 KB |
Output is correct |
33 |
Correct |
377 ms |
88696 KB |
Output is correct |
34 |
Correct |
541 ms |
88928 KB |
Output is correct |
35 |
Correct |
350 ms |
88648 KB |
Output is correct |
36 |
Correct |
372 ms |
88992 KB |
Output is correct |
37 |
Correct |
562 ms |
88964 KB |
Output is correct |
38 |
Correct |
378 ms |
88860 KB |
Output is correct |
39 |
Correct |
711 ms |
88888 KB |
Output is correct |
40 |
Correct |
629 ms |
88608 KB |
Output is correct |
41 |
Correct |
622 ms |
89352 KB |
Output is correct |
42 |
Correct |
688 ms |
89352 KB |
Output is correct |
43 |
Correct |
646 ms |
88784 KB |
Output is correct |
44 |
Correct |
223 ms |
10308 KB |
Output is correct |
45 |
Correct |
202 ms |
9964 KB |
Output is correct |
46 |
Correct |
1568 ms |
9944 KB |
Output is correct |
47 |
Correct |
449 ms |
9820 KB |
Output is correct |
48 |
Correct |
228 ms |
9976 KB |
Output is correct |
49 |
Correct |
386 ms |
88304 KB |
Output is correct |
50 |
Correct |
1365 ms |
93484 KB |
Output is correct |
51 |
Correct |
223 ms |
10700 KB |
Output is correct |
52 |
Correct |
1622 ms |
10492 KB |
Output is correct |
53 |
Correct |
421 ms |
89520 KB |
Output is correct |
54 |
Correct |
640 ms |
89592 KB |
Output is correct |
55 |
Correct |
1441 ms |
89792 KB |
Output is correct |
56 |
Correct |
1312 ms |
89976 KB |
Output is correct |
57 |
Correct |
220 ms |
10744 KB |
Output is correct |
58 |
Correct |
246 ms |
10748 KB |
Output is correct |
59 |
Correct |
1622 ms |
10488 KB |
Output is correct |
60 |
Correct |
1583 ms |
10616 KB |
Output is correct |
61 |
Correct |
536 ms |
93688 KB |
Output is correct |
62 |
Correct |
584 ms |
89984 KB |
Output is correct |
63 |
Correct |
659 ms |
89848 KB |
Output is correct |
64 |
Correct |
942 ms |
93944 KB |
Output is correct |
65 |
Correct |
995 ms |
90000 KB |
Output is correct |
66 |
Correct |
967 ms |
89824 KB |
Output is correct |
67 |
Correct |
1388 ms |
93816 KB |
Output is correct |
68 |
Correct |
1331 ms |
89820 KB |
Output is correct |
69 |
Correct |
1310 ms |
89980 KB |
Output is correct |
70 |
Correct |
380 ms |
93048 KB |
Output is correct |
71 |
Correct |
397 ms |
89592 KB |
Output is correct |
72 |
Correct |
582 ms |
89688 KB |
Output is correct |
73 |
Correct |
424 ms |
93884 KB |
Output is correct |
74 |
Correct |
483 ms |
90124 KB |
Output is correct |
75 |
Correct |
667 ms |
90384 KB |
Output is correct |
76 |
Correct |
389 ms |
89420 KB |
Output is correct |
77 |
Correct |
1319 ms |
94368 KB |
Output is correct |
78 |
Correct |
372 ms |
93820 KB |
Output is correct |
79 |
Correct |
234 ms |
11384 KB |
Output is correct |
80 |
Correct |
1610 ms |
11064 KB |
Output is correct |
81 |
Correct |
226 ms |
10968 KB |
Output is correct |
82 |
Correct |
397 ms |
89388 KB |
Output is correct |
83 |
Correct |
511 ms |
89064 KB |
Output is correct |
84 |
Correct |
1556 ms |
90488 KB |
Output is correct |
85 |
Correct |
1372 ms |
89728 KB |
Output is correct |
86 |
Correct |
374 ms |
89976 KB |
Output is correct |
87 |
Correct |
496 ms |
89488 KB |
Output is correct |
88 |
Correct |
223 ms |
11200 KB |
Output is correct |
89 |
Correct |
227 ms |
10972 KB |
Output is correct |
90 |
Correct |
1539 ms |
10920 KB |
Output is correct |
91 |
Correct |
1534 ms |
10724 KB |
Output is correct |
92 |
Correct |
219 ms |
10732 KB |
Output is correct |
93 |
Correct |
230 ms |
10680 KB |
Output is correct |
94 |
Correct |
392 ms |
89820 KB |
Output is correct |
95 |
Correct |
615 ms |
89516 KB |
Output is correct |
96 |
Correct |
1301 ms |
90240 KB |
Output is correct |
97 |
Correct |
1450 ms |
90212 KB |
Output is correct |
98 |
Correct |
387 ms |
90128 KB |
Output is correct |
99 |
Correct |
567 ms |
89868 KB |
Output is correct |
100 |
Correct |
236 ms |
11040 KB |
Output is correct |
101 |
Correct |
234 ms |
11008 KB |
Output is correct |
102 |
Correct |
1329 ms |
10712 KB |
Output is correct |
103 |
Correct |
1487 ms |
10712 KB |
Output is correct |
104 |
Correct |
208 ms |
10644 KB |
Output is correct |
105 |
Correct |
219 ms |
10772 KB |
Output is correct |
106 |
Correct |
431 ms |
89868 KB |
Output is correct |
107 |
Correct |
631 ms |
89592 KB |
Output is correct |
108 |
Correct |
1259 ms |
90364 KB |
Output is correct |
109 |
Correct |
1386 ms |
90252 KB |
Output is correct |
110 |
Correct |
403 ms |
90168 KB |
Output is correct |
111 |
Correct |
578 ms |
90032 KB |
Output is correct |
112 |
Correct |
226 ms |
11000 KB |
Output is correct |
113 |
Correct |
224 ms |
11048 KB |
Output is correct |
114 |
Correct |
1528 ms |
10716 KB |
Output is correct |
115 |
Correct |
1520 ms |
10800 KB |
Output is correct |
116 |
Correct |
230 ms |
10688 KB |
Output is correct |
117 |
Correct |
275 ms |
10692 KB |
Output is correct |
118 |
Correct |
350 ms |
88508 KB |
Output is correct |
119 |
Correct |
369 ms |
89336 KB |
Output is correct |
120 |
Correct |
584 ms |
89292 KB |
Output is correct |
121 |
Correct |
351 ms |
88568 KB |
Output is correct |
122 |
Correct |
373 ms |
89428 KB |
Output is correct |
123 |
Correct |
600 ms |
89396 KB |
Output is correct |
124 |
Correct |
376 ms |
88536 KB |
Output is correct |
125 |
Correct |
374 ms |
89276 KB |
Output is correct |
126 |
Correct |
554 ms |
89272 KB |
Output is correct |