#include <bits/stdc++.h>
#define ALL(x) x.begin(), x.end()
#define pii pair<int,int>
const int MAXN = 1e5 + 1;
const int SQRT = 50;
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];
vector<pii> best[MAXN];
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].push_back(pii(0, u));
for(auto v : trafo[u]){
for(auto [x, w] : best[v])
best[u].push_back(pii(x-1, w));
if(best[u].size() >= 300)
{
sort(ALL(best[u]));
best[u].resize(min(SQRT, (int)(unique(ALL(best[u])) - best[u].begin())));
}
}
sort(ALL(best[u]));
best[u].resize(min(SQRT, (int)(unique(ALL(best[u])) - best[u].begin())));
}
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(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:65:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
65 | scanf("%d %d", &t, &y);
| ~~~~~^~~~~~~~~~~~~~~~~
bitaro.cpp:69:9: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
69 | scanf("%d", &x);
| ~~~~~^~~~~~~~~~
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
2 ms |
4956 KB |
Output is correct |
2 |
Correct |
2 ms |
4956 KB |
Output is correct |
3 |
Correct |
2 ms |
4956 KB |
Output is correct |
4 |
Correct |
2 ms |
5168 KB |
Output is correct |
5 |
Correct |
5 ms |
5748 KB |
Output is correct |
6 |
Correct |
5 ms |
5724 KB |
Output is correct |
7 |
Correct |
5 ms |
5724 KB |
Output is correct |
8 |
Correct |
5 ms |
6236 KB |
Output is correct |
9 |
Correct |
5 ms |
6236 KB |
Output is correct |
10 |
Correct |
5 ms |
6236 KB |
Output is correct |
11 |
Correct |
6 ms |
6236 KB |
Output is correct |
12 |
Correct |
5 ms |
5948 KB |
Output is correct |
13 |
Correct |
5 ms |
6236 KB |
Output is correct |
14 |
Correct |
5 ms |
5692 KB |
Output is correct |
15 |
Correct |
4 ms |
5724 KB |
Output is correct |
16 |
Correct |
4 ms |
5724 KB |
Output is correct |
17 |
Correct |
5 ms |
5980 KB |
Output is correct |
18 |
Correct |
4 ms |
5724 KB |
Output is correct |
19 |
Correct |
5 ms |
5980 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
2 ms |
4956 KB |
Output is correct |
2 |
Correct |
2 ms |
4956 KB |
Output is correct |
3 |
Correct |
2 ms |
4956 KB |
Output is correct |
4 |
Correct |
2 ms |
5168 KB |
Output is correct |
5 |
Correct |
5 ms |
5748 KB |
Output is correct |
6 |
Correct |
5 ms |
5724 KB |
Output is correct |
7 |
Correct |
5 ms |
5724 KB |
Output is correct |
8 |
Correct |
5 ms |
6236 KB |
Output is correct |
9 |
Correct |
5 ms |
6236 KB |
Output is correct |
10 |
Correct |
5 ms |
6236 KB |
Output is correct |
11 |
Correct |
6 ms |
6236 KB |
Output is correct |
12 |
Correct |
5 ms |
5948 KB |
Output is correct |
13 |
Correct |
5 ms |
6236 KB |
Output is correct |
14 |
Correct |
5 ms |
5692 KB |
Output is correct |
15 |
Correct |
4 ms |
5724 KB |
Output is correct |
16 |
Correct |
4 ms |
5724 KB |
Output is correct |
17 |
Correct |
5 ms |
5980 KB |
Output is correct |
18 |
Correct |
4 ms |
5724 KB |
Output is correct |
19 |
Correct |
5 ms |
5980 KB |
Output is correct |
20 |
Correct |
338 ms |
11988 KB |
Output is correct |
21 |
Correct |
305 ms |
11860 KB |
Output is correct |
22 |
Correct |
305 ms |
11860 KB |
Output is correct |
23 |
Correct |
315 ms |
11700 KB |
Output is correct |
24 |
Correct |
375 ms |
98496 KB |
Output is correct |
25 |
Correct |
377 ms |
98640 KB |
Output is correct |
26 |
Correct |
363 ms |
98564 KB |
Output is correct |
27 |
Correct |
291 ms |
122600 KB |
Output is correct |
28 |
Correct |
316 ms |
122704 KB |
Output is correct |
29 |
Correct |
294 ms |
122264 KB |
Output is correct |
30 |
Correct |
311 ms |
122468 KB |
Output is correct |
31 |
Correct |
364 ms |
117768 KB |
Output is correct |
32 |
Correct |
314 ms |
122288 KB |
Output is correct |
33 |
Correct |
273 ms |
82136 KB |
Output is correct |
34 |
Correct |
275 ms |
76112 KB |
Output is correct |
35 |
Correct |
247 ms |
81492 KB |
Output is correct |
36 |
Correct |
280 ms |
101204 KB |
Output is correct |
37 |
Correct |
292 ms |
95008 KB |
Output is correct |
38 |
Correct |
277 ms |
101204 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
2 ms |
4956 KB |
Output is correct |
2 |
Correct |
2 ms |
4956 KB |
Output is correct |
3 |
Correct |
2 ms |
4956 KB |
Output is correct |
4 |
Correct |
2 ms |
5168 KB |
Output is correct |
5 |
Correct |
5 ms |
5748 KB |
Output is correct |
6 |
Correct |
5 ms |
5724 KB |
Output is correct |
7 |
Correct |
5 ms |
5724 KB |
Output is correct |
8 |
Correct |
5 ms |
6236 KB |
Output is correct |
9 |
Correct |
5 ms |
6236 KB |
Output is correct |
10 |
Correct |
5 ms |
6236 KB |
Output is correct |
11 |
Correct |
6 ms |
6236 KB |
Output is correct |
12 |
Correct |
5 ms |
5948 KB |
Output is correct |
13 |
Correct |
5 ms |
6236 KB |
Output is correct |
14 |
Correct |
5 ms |
5692 KB |
Output is correct |
15 |
Correct |
4 ms |
5724 KB |
Output is correct |
16 |
Correct |
4 ms |
5724 KB |
Output is correct |
17 |
Correct |
5 ms |
5980 KB |
Output is correct |
18 |
Correct |
4 ms |
5724 KB |
Output is correct |
19 |
Correct |
5 ms |
5980 KB |
Output is correct |
20 |
Correct |
338 ms |
11988 KB |
Output is correct |
21 |
Correct |
305 ms |
11860 KB |
Output is correct |
22 |
Correct |
305 ms |
11860 KB |
Output is correct |
23 |
Correct |
315 ms |
11700 KB |
Output is correct |
24 |
Correct |
375 ms |
98496 KB |
Output is correct |
25 |
Correct |
377 ms |
98640 KB |
Output is correct |
26 |
Correct |
363 ms |
98564 KB |
Output is correct |
27 |
Correct |
291 ms |
122600 KB |
Output is correct |
28 |
Correct |
316 ms |
122704 KB |
Output is correct |
29 |
Correct |
294 ms |
122264 KB |
Output is correct |
30 |
Correct |
311 ms |
122468 KB |
Output is correct |
31 |
Correct |
364 ms |
117768 KB |
Output is correct |
32 |
Correct |
314 ms |
122288 KB |
Output is correct |
33 |
Correct |
273 ms |
82136 KB |
Output is correct |
34 |
Correct |
275 ms |
76112 KB |
Output is correct |
35 |
Correct |
247 ms |
81492 KB |
Output is correct |
36 |
Correct |
280 ms |
101204 KB |
Output is correct |
37 |
Correct |
292 ms |
95008 KB |
Output is correct |
38 |
Correct |
277 ms |
101204 KB |
Output is correct |
39 |
Correct |
413 ms |
99432 KB |
Output is correct |
40 |
Correct |
364 ms |
98188 KB |
Output is correct |
41 |
Correct |
382 ms |
98388 KB |
Output is correct |
42 |
Correct |
396 ms |
99220 KB |
Output is correct |
43 |
Correct |
367 ms |
98644 KB |
Output is correct |
44 |
Correct |
368 ms |
13080 KB |
Output is correct |
45 |
Correct |
345 ms |
12368 KB |
Output is correct |
46 |
Correct |
363 ms |
12112 KB |
Output is correct |
47 |
Correct |
334 ms |
11896 KB |
Output is correct |
48 |
Correct |
333 ms |
11860 KB |
Output is correct |
49 |
Correct |
349 ms |
123356 KB |
Output is correct |
50 |
Correct |
906 ms |
122192 KB |
Output is correct |
51 |
Correct |
353 ms |
12880 KB |
Output is correct |
52 |
Correct |
554 ms |
11972 KB |
Output is correct |
53 |
Correct |
325 ms |
101712 KB |
Output is correct |
54 |
Correct |
395 ms |
95964 KB |
Output is correct |
55 |
Correct |
832 ms |
100688 KB |
Output is correct |
56 |
Correct |
980 ms |
95572 KB |
Output is correct |
57 |
Correct |
343 ms |
12916 KB |
Output is correct |
58 |
Correct |
390 ms |
12880 KB |
Output is correct |
59 |
Correct |
575 ms |
11988 KB |
Output is correct |
60 |
Correct |
620 ms |
12280 KB |
Output is correct |
61 |
Correct |
401 ms |
122192 KB |
Output is correct |
62 |
Correct |
336 ms |
101200 KB |
Output is correct |
63 |
Correct |
401 ms |
95008 KB |
Output is correct |
64 |
Correct |
495 ms |
122456 KB |
Output is correct |
65 |
Correct |
460 ms |
100524 KB |
Output is correct |
66 |
Correct |
566 ms |
95248 KB |
Output is correct |
67 |
Correct |
618 ms |
122192 KB |
Output is correct |
68 |
Correct |
594 ms |
101124 KB |
Output is correct |
69 |
Correct |
647 ms |
94012 KB |
Output is correct |
70 |
Correct |
327 ms |
122460 KB |
Output is correct |
71 |
Correct |
340 ms |
101064 KB |
Output is correct |
72 |
Correct |
349 ms |
94800 KB |
Output is correct |
73 |
Correct |
348 ms |
122448 KB |
Output is correct |
74 |
Correct |
324 ms |
101204 KB |
Output is correct |
75 |
Correct |
372 ms |
94800 KB |
Output is correct |
76 |
Correct |
343 ms |
124100 KB |
Output is correct |
77 |
Correct |
320 ms |
123064 KB |
Output is correct |
78 |
Correct |
326 ms |
122792 KB |
Output is correct |
79 |
Correct |
343 ms |
13228 KB |
Output is correct |
80 |
Correct |
327 ms |
12276 KB |
Output is correct |
81 |
Correct |
318 ms |
11748 KB |
Output is correct |
82 |
Correct |
397 ms |
124036 KB |
Output is correct |
83 |
Correct |
421 ms |
119768 KB |
Output is correct |
84 |
Correct |
341 ms |
122704 KB |
Output is correct |
85 |
Correct |
390 ms |
118088 KB |
Output is correct |
86 |
Correct |
337 ms |
122828 KB |
Output is correct |
87 |
Correct |
396 ms |
118960 KB |
Output is correct |
88 |
Correct |
348 ms |
13140 KB |
Output is correct |
89 |
Correct |
360 ms |
13188 KB |
Output is correct |
90 |
Correct |
334 ms |
12112 KB |
Output is correct |
91 |
Correct |
364 ms |
12112 KB |
Output is correct |
92 |
Correct |
332 ms |
11860 KB |
Output is correct |
93 |
Correct |
330 ms |
11688 KB |
Output is correct |
94 |
Correct |
301 ms |
83460 KB |
Output is correct |
95 |
Correct |
315 ms |
77396 KB |
Output is correct |
96 |
Correct |
278 ms |
82256 KB |
Output is correct |
97 |
Correct |
307 ms |
77136 KB |
Output is correct |
98 |
Correct |
277 ms |
82772 KB |
Output is correct |
99 |
Correct |
293 ms |
76884 KB |
Output is correct |
100 |
Correct |
343 ms |
13108 KB |
Output is correct |
101 |
Correct |
342 ms |
13140 KB |
Output is correct |
102 |
Correct |
302 ms |
12096 KB |
Output is correct |
103 |
Correct |
365 ms |
12124 KB |
Output is correct |
104 |
Correct |
333 ms |
11800 KB |
Output is correct |
105 |
Correct |
323 ms |
11860 KB |
Output is correct |
106 |
Correct |
345 ms |
102740 KB |
Output is correct |
107 |
Correct |
384 ms |
97432 KB |
Output is correct |
108 |
Correct |
311 ms |
101968 KB |
Output is correct |
109 |
Correct |
330 ms |
94784 KB |
Output is correct |
110 |
Correct |
301 ms |
101968 KB |
Output is correct |
111 |
Correct |
326 ms |
95824 KB |
Output is correct |
112 |
Correct |
324 ms |
13136 KB |
Output is correct |
113 |
Correct |
367 ms |
13252 KB |
Output is correct |
114 |
Correct |
353 ms |
12116 KB |
Output is correct |
115 |
Correct |
343 ms |
12284 KB |
Output is correct |
116 |
Correct |
334 ms |
11908 KB |
Output is correct |
117 |
Correct |
328 ms |
11712 KB |
Output is correct |
118 |
Execution timed out |
2039 ms |
122368 KB |
Time limit exceeded |
119 |
Halted |
0 ms |
0 KB |
- |