#include <bits/stdc++.h>
using namespace std;
#ifdef LOCAL
#include "debug.h"
#else
#define debug(...) 42
#endif
int main() {
ios::sync_with_stdio(false); cin.tie(nullptr);
const int S = 320, inf = 1e9;
int N, M, Q; cin >> N >> M >> Q;
vector<vector<int>> g(N);
while (M--) {
int u, v; cin >> u >> v; --u, --v;
g[u].push_back(v);
}
vector<vector<array<int, 2>>> cands(N);
vector<bool> vs(N);
auto mrg = [&](vector<array<int, 2>> A, vector<array<int, 2>> B) {
vector<array<int, 2>> res;
auto add = [&](const array<int, 2> &elem) {
if (!vs[elem[1]]) {
res.push_back(elem);
vs[elem[1]] = 1;
}
};
for (auto &x : A) {
++x[0];
}
for (int i = 0, j = 0; res.size() < S && (i < A.size() || j < B.size()); ) {
if (i == A.size()) {
add(B[j++]);
} else if (j == B.size()) {
add(A[i++]);
} else if (A[i][0] > B[j][0]) {
add(A[i++]);
} else {
add(B[j++]);
}
}
for (auto &x : res) {
vs[x[1]] = 0;
}
return res;
};
for (int i = 0; i < N; ++i) {
cands[i] = mrg({{-1, i}}, cands[i]);
for (int j : g[i]) {
cands[j] = mrg(cands[i], cands[j]);
}
}
vector<int> dp(N);
while (Q--) {
int T, Y; cin >> T >> Y; --T;
vector<int> C(Y);
for (int &x : C) {
cin >> x; --x;
vs[x] = 1;
}
if (Y >= S) {
fill(dp.begin(), dp.end(), -inf);
for (int i = 0; i < N; ++i) {
if (!vs[i]) {
dp[i] = max(dp[i], 0);
}
for (int j : g[i]) {
dp[j] = max(dp[j], dp[i] + 1);
}
}
cout << (dp[T] >= 0 ? dp[T] : -1) << "\n";
} else {
int res = -1;
for (auto &x : cands[T]) {
if (!vs[x[1]]) {
res = x[0];
break;
}
}
cout << res << "\n";
}
for (int &x : C) {
vs[x] = 0;
}
}
return 0;
}
Compilation message
bitaro.cpp: In lambda function:
bitaro.cpp:35:47: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::array<int, 2> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
35 | for (int i = 0, j = 0; res.size() < S && (i < A.size() || j < B.size()); ) {
| ~~^~~~~~~~~~
bitaro.cpp:35:63: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::array<int, 2> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
35 | for (int i = 0, j = 0; res.size() < S && (i < A.size() || j < B.size()); ) {
| ~~^~~~~~~~~~
bitaro.cpp:36:10: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::array<int, 2> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
36 | if (i == A.size()) {
| ~~^~~~~~~~~~~
bitaro.cpp:38:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::array<int, 2> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
38 | } else if (j == B.size()) {
| ~~^~~~~~~~~~~
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
348 KB |
Output is correct |
2 |
Correct |
0 ms |
348 KB |
Output is correct |
3 |
Correct |
0 ms |
348 KB |
Output is correct |
4 |
Correct |
0 ms |
460 KB |
Output is correct |
5 |
Correct |
2 ms |
988 KB |
Output is correct |
6 |
Correct |
3 ms |
860 KB |
Output is correct |
7 |
Correct |
2 ms |
980 KB |
Output is correct |
8 |
Correct |
9 ms |
3968 KB |
Output is correct |
9 |
Correct |
9 ms |
4188 KB |
Output is correct |
10 |
Correct |
9 ms |
4040 KB |
Output is correct |
11 |
Correct |
8 ms |
3672 KB |
Output is correct |
12 |
Correct |
4 ms |
1804 KB |
Output is correct |
13 |
Correct |
6 ms |
3612 KB |
Output is correct |
14 |
Correct |
6 ms |
2400 KB |
Output is correct |
15 |
Correct |
3 ms |
1372 KB |
Output is correct |
16 |
Correct |
8 ms |
2568 KB |
Output is correct |
17 |
Correct |
8 ms |
2780 KB |
Output is correct |
18 |
Correct |
4 ms |
1648 KB |
Output is correct |
19 |
Correct |
8 ms |
2652 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
348 KB |
Output is correct |
2 |
Correct |
0 ms |
348 KB |
Output is correct |
3 |
Correct |
0 ms |
348 KB |
Output is correct |
4 |
Correct |
0 ms |
460 KB |
Output is correct |
5 |
Correct |
2 ms |
988 KB |
Output is correct |
6 |
Correct |
3 ms |
860 KB |
Output is correct |
7 |
Correct |
2 ms |
980 KB |
Output is correct |
8 |
Correct |
9 ms |
3968 KB |
Output is correct |
9 |
Correct |
9 ms |
4188 KB |
Output is correct |
10 |
Correct |
9 ms |
4040 KB |
Output is correct |
11 |
Correct |
8 ms |
3672 KB |
Output is correct |
12 |
Correct |
4 ms |
1804 KB |
Output is correct |
13 |
Correct |
6 ms |
3612 KB |
Output is correct |
14 |
Correct |
6 ms |
2400 KB |
Output is correct |
15 |
Correct |
3 ms |
1372 KB |
Output is correct |
16 |
Correct |
8 ms |
2568 KB |
Output is correct |
17 |
Correct |
8 ms |
2780 KB |
Output is correct |
18 |
Correct |
4 ms |
1648 KB |
Output is correct |
19 |
Correct |
8 ms |
2652 KB |
Output is correct |
20 |
Correct |
416 ms |
6996 KB |
Output is correct |
21 |
Correct |
410 ms |
6824 KB |
Output is correct |
22 |
Correct |
406 ms |
6992 KB |
Output is correct |
23 |
Correct |
515 ms |
6736 KB |
Output is correct |
24 |
Correct |
652 ms |
258892 KB |
Output is correct |
25 |
Correct |
701 ms |
269648 KB |
Output is correct |
26 |
Correct |
676 ms |
269708 KB |
Output is correct |
27 |
Correct |
877 ms |
413728 KB |
Output is correct |
28 |
Correct |
886 ms |
413736 KB |
Output is correct |
29 |
Correct |
939 ms |
413780 KB |
Output is correct |
30 |
Correct |
892 ms |
412912 KB |
Output is correct |
31 |
Correct |
837 ms |
402972 KB |
Output is correct |
32 |
Correct |
849 ms |
412900 KB |
Output is correct |
33 |
Correct |
680 ms |
256336 KB |
Output is correct |
34 |
Correct |
481 ms |
211612 KB |
Output is correct |
35 |
Correct |
689 ms |
254392 KB |
Output is correct |
36 |
Correct |
835 ms |
334540 KB |
Output is correct |
37 |
Correct |
718 ms |
305196 KB |
Output is correct |
38 |
Correct |
798 ms |
335828 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
348 KB |
Output is correct |
2 |
Correct |
0 ms |
348 KB |
Output is correct |
3 |
Correct |
0 ms |
348 KB |
Output is correct |
4 |
Correct |
0 ms |
460 KB |
Output is correct |
5 |
Correct |
2 ms |
988 KB |
Output is correct |
6 |
Correct |
3 ms |
860 KB |
Output is correct |
7 |
Correct |
2 ms |
980 KB |
Output is correct |
8 |
Correct |
9 ms |
3968 KB |
Output is correct |
9 |
Correct |
9 ms |
4188 KB |
Output is correct |
10 |
Correct |
9 ms |
4040 KB |
Output is correct |
11 |
Correct |
8 ms |
3672 KB |
Output is correct |
12 |
Correct |
4 ms |
1804 KB |
Output is correct |
13 |
Correct |
6 ms |
3612 KB |
Output is correct |
14 |
Correct |
6 ms |
2400 KB |
Output is correct |
15 |
Correct |
3 ms |
1372 KB |
Output is correct |
16 |
Correct |
8 ms |
2568 KB |
Output is correct |
17 |
Correct |
8 ms |
2780 KB |
Output is correct |
18 |
Correct |
4 ms |
1648 KB |
Output is correct |
19 |
Correct |
8 ms |
2652 KB |
Output is correct |
20 |
Correct |
416 ms |
6996 KB |
Output is correct |
21 |
Correct |
410 ms |
6824 KB |
Output is correct |
22 |
Correct |
406 ms |
6992 KB |
Output is correct |
23 |
Correct |
515 ms |
6736 KB |
Output is correct |
24 |
Correct |
652 ms |
258892 KB |
Output is correct |
25 |
Correct |
701 ms |
269648 KB |
Output is correct |
26 |
Correct |
676 ms |
269708 KB |
Output is correct |
27 |
Correct |
877 ms |
413728 KB |
Output is correct |
28 |
Correct |
886 ms |
413736 KB |
Output is correct |
29 |
Correct |
939 ms |
413780 KB |
Output is correct |
30 |
Correct |
892 ms |
412912 KB |
Output is correct |
31 |
Correct |
837 ms |
402972 KB |
Output is correct |
32 |
Correct |
849 ms |
412900 KB |
Output is correct |
33 |
Correct |
680 ms |
256336 KB |
Output is correct |
34 |
Correct |
481 ms |
211612 KB |
Output is correct |
35 |
Correct |
689 ms |
254392 KB |
Output is correct |
36 |
Correct |
835 ms |
334540 KB |
Output is correct |
37 |
Correct |
718 ms |
305196 KB |
Output is correct |
38 |
Correct |
798 ms |
335828 KB |
Output is correct |
39 |
Correct |
674 ms |
263232 KB |
Output is correct |
40 |
Correct |
690 ms |
264272 KB |
Output is correct |
41 |
Correct |
713 ms |
267504 KB |
Output is correct |
42 |
Correct |
719 ms |
265296 KB |
Output is correct |
43 |
Correct |
651 ms |
264640 KB |
Output is correct |
44 |
Correct |
409 ms |
8276 KB |
Output is correct |
45 |
Correct |
484 ms |
7504 KB |
Output is correct |
46 |
Correct |
470 ms |
7388 KB |
Output is correct |
47 |
Correct |
431 ms |
7164 KB |
Output is correct |
48 |
Correct |
392 ms |
6992 KB |
Output is correct |
49 |
Correct |
916 ms |
414800 KB |
Output is correct |
50 |
Correct |
842 ms |
413472 KB |
Output is correct |
51 |
Correct |
428 ms |
8036 KB |
Output is correct |
52 |
Correct |
405 ms |
7256 KB |
Output is correct |
53 |
Correct |
834 ms |
334164 KB |
Output is correct |
54 |
Correct |
711 ms |
306396 KB |
Output is correct |
55 |
Correct |
792 ms |
333580 KB |
Output is correct |
56 |
Correct |
638 ms |
306380 KB |
Output is correct |
57 |
Correct |
407 ms |
8020 KB |
Output is correct |
58 |
Correct |
431 ms |
7928 KB |
Output is correct |
59 |
Correct |
389 ms |
7240 KB |
Output is correct |
60 |
Correct |
389 ms |
7260 KB |
Output is correct |
61 |
Correct |
940 ms |
413756 KB |
Output is correct |
62 |
Correct |
879 ms |
335084 KB |
Output is correct |
63 |
Correct |
702 ms |
304448 KB |
Output is correct |
64 |
Correct |
992 ms |
413548 KB |
Output is correct |
65 |
Correct |
970 ms |
333648 KB |
Output is correct |
66 |
Correct |
807 ms |
306772 KB |
Output is correct |
67 |
Correct |
799 ms |
413524 KB |
Output is correct |
68 |
Correct |
840 ms |
335128 KB |
Output is correct |
69 |
Correct |
595 ms |
302492 KB |
Output is correct |
70 |
Correct |
810 ms |
413904 KB |
Output is correct |
71 |
Correct |
764 ms |
334956 KB |
Output is correct |
72 |
Correct |
647 ms |
305804 KB |
Output is correct |
73 |
Correct |
829 ms |
413836 KB |
Output is correct |
74 |
Correct |
826 ms |
335076 KB |
Output is correct |
75 |
Correct |
631 ms |
305820 KB |
Output is correct |
76 |
Correct |
822 ms |
415396 KB |
Output is correct |
77 |
Correct |
745 ms |
413896 KB |
Output is correct |
78 |
Correct |
844 ms |
413976 KB |
Output is correct |
79 |
Correct |
381 ms |
8288 KB |
Output is correct |
80 |
Correct |
368 ms |
7248 KB |
Output is correct |
81 |
Correct |
375 ms |
6840 KB |
Output is correct |
82 |
Correct |
812 ms |
414288 KB |
Output is correct |
83 |
Correct |
792 ms |
404380 KB |
Output is correct |
84 |
Correct |
820 ms |
413068 KB |
Output is correct |
85 |
Correct |
882 ms |
402852 KB |
Output is correct |
86 |
Correct |
947 ms |
413012 KB |
Output is correct |
87 |
Correct |
819 ms |
403636 KB |
Output is correct |
88 |
Correct |
421 ms |
8268 KB |
Output is correct |
89 |
Correct |
414 ms |
8216 KB |
Output is correct |
90 |
Correct |
392 ms |
7328 KB |
Output is correct |
91 |
Correct |
412 ms |
7252 KB |
Output is correct |
92 |
Correct |
425 ms |
7060 KB |
Output is correct |
93 |
Correct |
404 ms |
7076 KB |
Output is correct |
94 |
Correct |
659 ms |
257444 KB |
Output is correct |
95 |
Correct |
555 ms |
211764 KB |
Output is correct |
96 |
Correct |
648 ms |
254960 KB |
Output is correct |
97 |
Correct |
479 ms |
214520 KB |
Output is correct |
98 |
Correct |
684 ms |
255948 KB |
Output is correct |
99 |
Correct |
514 ms |
214020 KB |
Output is correct |
100 |
Correct |
465 ms |
8216 KB |
Output is correct |
101 |
Correct |
523 ms |
8272 KB |
Output is correct |
102 |
Correct |
494 ms |
7136 KB |
Output is correct |
103 |
Correct |
445 ms |
7128 KB |
Output is correct |
104 |
Correct |
478 ms |
7004 KB |
Output is correct |
105 |
Correct |
492 ms |
6844 KB |
Output is correct |
106 |
Correct |
757 ms |
335100 KB |
Output is correct |
107 |
Correct |
637 ms |
307024 KB |
Output is correct |
108 |
Correct |
768 ms |
335956 KB |
Output is correct |
109 |
Correct |
619 ms |
305320 KB |
Output is correct |
110 |
Correct |
921 ms |
336208 KB |
Output is correct |
111 |
Correct |
698 ms |
306800 KB |
Output is correct |
112 |
Correct |
407 ms |
8180 KB |
Output is correct |
113 |
Correct |
372 ms |
8272 KB |
Output is correct |
114 |
Correct |
417 ms |
7356 KB |
Output is correct |
115 |
Correct |
407 ms |
7244 KB |
Output is correct |
116 |
Correct |
441 ms |
7060 KB |
Output is correct |
117 |
Correct |
424 ms |
7048 KB |
Output is correct |
118 |
Correct |
882 ms |
413472 KB |
Output is correct |
119 |
Correct |
869 ms |
335536 KB |
Output is correct |
120 |
Correct |
740 ms |
304932 KB |
Output is correct |
121 |
Correct |
902 ms |
413524 KB |
Output is correct |
122 |
Correct |
860 ms |
334160 KB |
Output is correct |
123 |
Correct |
724 ms |
305304 KB |
Output is correct |
124 |
Correct |
861 ms |
413560 KB |
Output is correct |
125 |
Correct |
797 ms |
335840 KB |
Output is correct |
126 |
Correct |
644 ms |
304248 KB |
Output is correct |