#include <bits/stdc++.h>
#define ALL(x) x.begin(), x.end()
#define pii pair<int,int>
const int MAXN = 1e5 + 64;
const int SQRT = 150;
using namespace std;
#pragma GCC optimize("Ofast,unroll-loops")
#pragma GCC target("avx2,popcnt,lzcnt,abm,bmi,bmi2,fma,tune=native")
int block[MAXN], dp[MAXN], order[MAXN], tempo;
vector<int> trafo[MAXN];
pii best[MAXN][4*SQRT+5];
// mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
int main(){
ios::sync_with_stdio(false);
int n, m, q;
scanf("%d %d %d", &n, &m, &q);
for(int i=0, u, v; i<m; i++)
{
scanf("%d %d", &u, &v);
trafo[v].push_back(u);
dp[u]++;
}
deque<int> fila;
for(int i=1; i<=n; i++) if(!dp[i]) fila.push_back(i);
int od = n;
while(!fila.empty())
{
int u = fila.front(); fila.pop_front();
order[--od] = u;
// shuffle(ALL(trafo[u]), rng);
for(int v : trafo[u])
if(--dp[v] == 0)
fila.push_back(v);
}
order[n] = -1;
for(int u : order)
{
if(u == -1) break;
best[u][0] = pii(0, u);
int sz = 1;
for(auto v : trafo[u]){
for(auto [x, w] : best[v])
{
if(w == -1) break;
best[u][sz++] = pii(x-1, w);
}
if(sz >= 3*SQRT)
{
sort(best[u], best[u]+sz);
sz = min(SQRT, (int)(unique(best[u], best[u]+sz) - best[u]));
}
}
sort(best[u], best[u]+sz);
sz = min(SQRT, (int)(unique(best[u], best[u]+sz) - best[u]));
best[u][sz] = pii(999999, -1);
}
int t, y;
while(q--)
{
tempo++;
scanf("%d %d", &t, &y);
for(int i=0, x; i<y; i++)
{
scanf("%d", &x);
block[x] = tempo;
}
int ans = -1;
for(auto [x, w] : best[t])
{
if(w == -1) break;
if(block[w] != tempo)
{
ans = -x;
break;
}
}
if(ans == -1) for(int u : order)
{
dp[u] = (block[u] == tempo ? -1 : 0);
for(auto v : trafo[u])
if(~dp[v])
dp[u] = max(dp[u], dp[v]+1);
if(u == t){ ans = dp[u]; break; }
}
printf("%d\n", ans);
}
return 0;
}
Compilation message
bitaro.cpp: In function 'int main()':
bitaro.cpp:18:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
18 | scanf("%d %d %d", &n, &m, &q);
| ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
bitaro.cpp:22:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
22 | scanf("%d %d", &u, &v);
| ~~~~~^~~~~~~~~~~~~~~~~
bitaro.cpp:70:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
70 | scanf("%d %d", &t, &y);
| ~~~~~^~~~~~~~~~~~~~~~~
bitaro.cpp:74:9: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
74 | scanf("%d", &x);
| ~~~~~^~~~~~~~~~
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
2 ms |
2652 KB |
Output is correct |
2 |
Correct |
1 ms |
2652 KB |
Output is correct |
3 |
Correct |
1 ms |
2652 KB |
Output is correct |
4 |
Correct |
1 ms |
2652 KB |
Output is correct |
5 |
Correct |
7 ms |
7380 KB |
Output is correct |
6 |
Correct |
6 ms |
7260 KB |
Output is correct |
7 |
Correct |
6 ms |
7268 KB |
Output is correct |
8 |
Correct |
7 ms |
7516 KB |
Output is correct |
9 |
Correct |
6 ms |
7396 KB |
Output is correct |
10 |
Correct |
6 ms |
7516 KB |
Output is correct |
11 |
Correct |
7 ms |
7516 KB |
Output is correct |
12 |
Correct |
7 ms |
7516 KB |
Output is correct |
13 |
Correct |
7 ms |
7516 KB |
Output is correct |
14 |
Correct |
7 ms |
7256 KB |
Output is correct |
15 |
Correct |
6 ms |
7004 KB |
Output is correct |
16 |
Correct |
7 ms |
7260 KB |
Output is correct |
17 |
Correct |
8 ms |
7300 KB |
Output is correct |
18 |
Correct |
7 ms |
7256 KB |
Output is correct |
19 |
Correct |
9 ms |
7516 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
2 ms |
2652 KB |
Output is correct |
2 |
Correct |
1 ms |
2652 KB |
Output is correct |
3 |
Correct |
1 ms |
2652 KB |
Output is correct |
4 |
Correct |
1 ms |
2652 KB |
Output is correct |
5 |
Correct |
7 ms |
7380 KB |
Output is correct |
6 |
Correct |
6 ms |
7260 KB |
Output is correct |
7 |
Correct |
6 ms |
7268 KB |
Output is correct |
8 |
Correct |
7 ms |
7516 KB |
Output is correct |
9 |
Correct |
6 ms |
7396 KB |
Output is correct |
10 |
Correct |
6 ms |
7516 KB |
Output is correct |
11 |
Correct |
7 ms |
7516 KB |
Output is correct |
12 |
Correct |
7 ms |
7516 KB |
Output is correct |
13 |
Correct |
7 ms |
7516 KB |
Output is correct |
14 |
Correct |
7 ms |
7256 KB |
Output is correct |
15 |
Correct |
6 ms |
7004 KB |
Output is correct |
16 |
Correct |
7 ms |
7260 KB |
Output is correct |
17 |
Correct |
8 ms |
7300 KB |
Output is correct |
18 |
Correct |
7 ms |
7256 KB |
Output is correct |
19 |
Correct |
9 ms |
7516 KB |
Output is correct |
20 |
Correct |
679 ms |
10252 KB |
Output is correct |
21 |
Correct |
592 ms |
10104 KB |
Output is correct |
22 |
Correct |
631 ms |
10324 KB |
Output is correct |
23 |
Correct |
622 ms |
10320 KB |
Output is correct |
24 |
Correct |
959 ms |
467116 KB |
Output is correct |
25 |
Correct |
927 ms |
466812 KB |
Output is correct |
26 |
Correct |
957 ms |
467044 KB |
Output is correct |
27 |
Correct |
538 ms |
483152 KB |
Output is correct |
28 |
Correct |
547 ms |
483156 KB |
Output is correct |
29 |
Correct |
555 ms |
482644 KB |
Output is correct |
30 |
Correct |
576 ms |
483128 KB |
Output is correct |
31 |
Correct |
703 ms |
481760 KB |
Output is correct |
32 |
Correct |
607 ms |
482900 KB |
Output is correct |
33 |
Correct |
633 ms |
455384 KB |
Output is correct |
34 |
Correct |
629 ms |
449664 KB |
Output is correct |
35 |
Correct |
581 ms |
454740 KB |
Output is correct |
36 |
Correct |
665 ms |
469100 KB |
Output is correct |
37 |
Correct |
739 ms |
465744 KB |
Output is correct |
38 |
Correct |
643 ms |
469344 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
2 ms |
2652 KB |
Output is correct |
2 |
Correct |
1 ms |
2652 KB |
Output is correct |
3 |
Correct |
1 ms |
2652 KB |
Output is correct |
4 |
Correct |
1 ms |
2652 KB |
Output is correct |
5 |
Correct |
7 ms |
7380 KB |
Output is correct |
6 |
Correct |
6 ms |
7260 KB |
Output is correct |
7 |
Correct |
6 ms |
7268 KB |
Output is correct |
8 |
Correct |
7 ms |
7516 KB |
Output is correct |
9 |
Correct |
6 ms |
7396 KB |
Output is correct |
10 |
Correct |
6 ms |
7516 KB |
Output is correct |
11 |
Correct |
7 ms |
7516 KB |
Output is correct |
12 |
Correct |
7 ms |
7516 KB |
Output is correct |
13 |
Correct |
7 ms |
7516 KB |
Output is correct |
14 |
Correct |
7 ms |
7256 KB |
Output is correct |
15 |
Correct |
6 ms |
7004 KB |
Output is correct |
16 |
Correct |
7 ms |
7260 KB |
Output is correct |
17 |
Correct |
8 ms |
7300 KB |
Output is correct |
18 |
Correct |
7 ms |
7256 KB |
Output is correct |
19 |
Correct |
9 ms |
7516 KB |
Output is correct |
20 |
Correct |
679 ms |
10252 KB |
Output is correct |
21 |
Correct |
592 ms |
10104 KB |
Output is correct |
22 |
Correct |
631 ms |
10324 KB |
Output is correct |
23 |
Correct |
622 ms |
10320 KB |
Output is correct |
24 |
Correct |
959 ms |
467116 KB |
Output is correct |
25 |
Correct |
927 ms |
466812 KB |
Output is correct |
26 |
Correct |
957 ms |
467044 KB |
Output is correct |
27 |
Correct |
538 ms |
483152 KB |
Output is correct |
28 |
Correct |
547 ms |
483156 KB |
Output is correct |
29 |
Correct |
555 ms |
482644 KB |
Output is correct |
30 |
Correct |
576 ms |
483128 KB |
Output is correct |
31 |
Correct |
703 ms |
481760 KB |
Output is correct |
32 |
Correct |
607 ms |
482900 KB |
Output is correct |
33 |
Correct |
633 ms |
455384 KB |
Output is correct |
34 |
Correct |
629 ms |
449664 KB |
Output is correct |
35 |
Correct |
581 ms |
454740 KB |
Output is correct |
36 |
Correct |
665 ms |
469100 KB |
Output is correct |
37 |
Correct |
739 ms |
465744 KB |
Output is correct |
38 |
Correct |
643 ms |
469344 KB |
Output is correct |
39 |
Correct |
940 ms |
467844 KB |
Output is correct |
40 |
Correct |
836 ms |
467284 KB |
Output is correct |
41 |
Correct |
876 ms |
467372 KB |
Output is correct |
42 |
Correct |
897 ms |
467740 KB |
Output is correct |
43 |
Correct |
952 ms |
467336 KB |
Output is correct |
44 |
Correct |
673 ms |
11408 KB |
Output is correct |
45 |
Correct |
635 ms |
10652 KB |
Output is correct |
46 |
Correct |
681 ms |
10576 KB |
Output is correct |
47 |
Correct |
633 ms |
10324 KB |
Output is correct |
48 |
Correct |
646 ms |
10320 KB |
Output is correct |
49 |
Correct |
544 ms |
483548 KB |
Output is correct |
50 |
Correct |
1095 ms |
482780 KB |
Output is correct |
51 |
Correct |
544 ms |
11008 KB |
Output is correct |
52 |
Correct |
852 ms |
10460 KB |
Output is correct |
53 |
Correct |
741 ms |
469420 KB |
Output is correct |
54 |
Correct |
736 ms |
466280 KB |
Output is correct |
55 |
Correct |
1109 ms |
468048 KB |
Output is correct |
56 |
Correct |
717 ms |
465744 KB |
Output is correct |
57 |
Correct |
589 ms |
11088 KB |
Output is correct |
58 |
Correct |
686 ms |
11000 KB |
Output is correct |
59 |
Correct |
819 ms |
10580 KB |
Output is correct |
60 |
Correct |
881 ms |
10580 KB |
Output is correct |
61 |
Correct |
555 ms |
482468 KB |
Output is correct |
62 |
Correct |
629 ms |
468496 KB |
Output is correct |
63 |
Correct |
759 ms |
465320 KB |
Output is correct |
64 |
Correct |
692 ms |
482644 KB |
Output is correct |
65 |
Correct |
739 ms |
468292 KB |
Output is correct |
66 |
Correct |
911 ms |
465572 KB |
Output is correct |
67 |
Correct |
723 ms |
482440 KB |
Output is correct |
68 |
Correct |
866 ms |
468768 KB |
Output is correct |
69 |
Correct |
869 ms |
464724 KB |
Output is correct |
70 |
Correct |
495 ms |
482644 KB |
Output is correct |
71 |
Correct |
589 ms |
468792 KB |
Output is correct |
72 |
Correct |
735 ms |
465488 KB |
Output is correct |
73 |
Correct |
484 ms |
482640 KB |
Output is correct |
74 |
Correct |
567 ms |
468296 KB |
Output is correct |
75 |
Correct |
711 ms |
465236 KB |
Output is correct |
76 |
Correct |
505 ms |
484180 KB |
Output is correct |
77 |
Correct |
514 ms |
483276 KB |
Output is correct |
78 |
Correct |
465 ms |
483180 KB |
Output is correct |
79 |
Correct |
621 ms |
11420 KB |
Output is correct |
80 |
Correct |
508 ms |
10576 KB |
Output is correct |
81 |
Correct |
511 ms |
10320 KB |
Output is correct |
82 |
Correct |
600 ms |
484176 KB |
Output is correct |
83 |
Correct |
778 ms |
482980 KB |
Output is correct |
84 |
Correct |
581 ms |
483260 KB |
Output is correct |
85 |
Correct |
735 ms |
481872 KB |
Output is correct |
86 |
Correct |
550 ms |
483160 KB |
Output is correct |
87 |
Correct |
665 ms |
482128 KB |
Output is correct |
88 |
Correct |
614 ms |
11312 KB |
Output is correct |
89 |
Correct |
635 ms |
11424 KB |
Output is correct |
90 |
Correct |
648 ms |
10576 KB |
Output is correct |
91 |
Correct |
605 ms |
10456 KB |
Output is correct |
92 |
Correct |
636 ms |
10156 KB |
Output is correct |
93 |
Correct |
671 ms |
10328 KB |
Output is correct |
94 |
Correct |
638 ms |
456708 KB |
Output is correct |
95 |
Correct |
623 ms |
450644 KB |
Output is correct |
96 |
Correct |
645 ms |
455376 KB |
Output is correct |
97 |
Correct |
602 ms |
450724 KB |
Output is correct |
98 |
Correct |
587 ms |
455248 KB |
Output is correct |
99 |
Correct |
619 ms |
450416 KB |
Output is correct |
100 |
Correct |
594 ms |
11480 KB |
Output is correct |
101 |
Correct |
580 ms |
11416 KB |
Output is correct |
102 |
Correct |
621 ms |
10576 KB |
Output is correct |
103 |
Correct |
598 ms |
10560 KB |
Output is correct |
104 |
Correct |
634 ms |
10160 KB |
Output is correct |
105 |
Correct |
647 ms |
10320 KB |
Output is correct |
106 |
Correct |
662 ms |
470816 KB |
Output is correct |
107 |
Correct |
791 ms |
467284 KB |
Output is correct |
108 |
Correct |
633 ms |
469636 KB |
Output is correct |
109 |
Correct |
739 ms |
465744 KB |
Output is correct |
110 |
Correct |
670 ms |
469844 KB |
Output is correct |
111 |
Correct |
763 ms |
466512 KB |
Output is correct |
112 |
Correct |
626 ms |
11448 KB |
Output is correct |
113 |
Correct |
708 ms |
11504 KB |
Output is correct |
114 |
Correct |
610 ms |
10576 KB |
Output is correct |
115 |
Correct |
589 ms |
10468 KB |
Output is correct |
116 |
Correct |
668 ms |
10200 KB |
Output is correct |
117 |
Correct |
618 ms |
10236 KB |
Output is correct |
118 |
Execution timed out |
2085 ms |
483076 KB |
Time limit exceeded |
119 |
Halted |
0 ms |
0 KB |
- |