#include <cstdio>
#include <algorithm>
#include <vector>
const int Inf = 0x3f3f3f3f;
const int MN = 100005, MS = 100005, B = 300 /* sqrt(MS) */, MB = B + 5;
int N, M, Q, banb[MN], ban[MN];
std::vector<int> G[MN];
int V[MN][MB], D[MN][MB], tV[MB], tD[MB], vis[MN];
void Prework() {
int id = 0;
for (int i = 1; i <= N; ++i) {
V[i][1] = i, D[i][1] = 0;
for (int j : G[i]) {
++id;
int x = 1, y = 1, z = 0;
while (V[i][x] && V[j][y] && z < B) {
int v, d;
if (D[i][x] > D[j][y]) v = V[i][x], d = D[i][x], ++x;
else v = V[j][y], d = D[j][y] + 1, ++y;
if (vis[v] != id)
vis[v] = id, ++z,
tV[z] = v, tD[z] = d;
}
while (V[i][x] && z < B) {
int v = V[i][x], d = D[i][x]; ++x;
if (vis[v] != id)
vis[v] = id, ++z,
tV[z] = v, tD[z] = d;
}
while (V[j][y] && z < B) {
int v = V[j][y], d = D[j][y] + 1; ++y;
if (vis[v] != id)
vis[v] = id, ++z,
tV[z] = v, tD[z] = d;
}
for (int k = 1; k <= z; ++k)
V[i][k] = tV[k], D[i][k] = tD[k];
}
}
}
int f[MN];
int main() {
scanf("%d%d%d", &N, &M, &Q);
for (int i = 1; i <= M; ++i) {
int x, y;
scanf("%d%d", &x, &y);
G[y].push_back(x);
}
Prework();
while (Q--) {
int s, c;
scanf("%d%d", &s, &c);
for (int i = 1; i <= c; ++i) scanf("%d", &ban[i]), banb[ban[i]] = 1;
if (c < B) {
int ans = -1;
for (int i = 1; V[s][i]; ++i)
if (!banb[V[s][i]]) {
ans = D[s][i];
break;
}
printf("%d\n", ans);
} else {
f[s] = 0;
for (int i = 1; i < s; ++i) f[i] = -Inf;
for (int i = s; i > 1; --i)
for (int j : G[i])
f[j] = std::max(f[j], f[i] + 1);
int ans = -1;
for (int i = 1; i <= s; ++i)
if (!banb[i]) ans = std::max(ans, f[i]);
printf("%d\n", ans);
}
for (int i = 1; i <= c; ++i) banb[ban[i]] = 0;
}
return 0;
}
Compilation message
bitaro.cpp: In function 'int main()':
bitaro.cpp:48:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%d%d%d", &N, &M, &Q);
~~~~~^~~~~~~~~~~~~~~~~~~~~~
bitaro.cpp:51:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%d%d", &x, &y);
~~~~~^~~~~~~~~~~~~~~~
bitaro.cpp:57:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%d%d", &s, &c);
~~~~~^~~~~~~~~~~~~~~~
bitaro.cpp:58:52: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
for (int i = 1; i <= c; ++i) scanf("%d", &ban[i]), banb[ban[i]] = 1;
~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
6 ms |
2688 KB |
Output is correct |
2 |
Correct |
6 ms |
2688 KB |
Output is correct |
3 |
Correct |
6 ms |
2688 KB |
Output is correct |
4 |
Correct |
6 ms |
2740 KB |
Output is correct |
5 |
Correct |
8 ms |
5120 KB |
Output is correct |
6 |
Correct |
8 ms |
5120 KB |
Output is correct |
7 |
Correct |
8 ms |
5120 KB |
Output is correct |
8 |
Correct |
9 ms |
5120 KB |
Output is correct |
9 |
Correct |
9 ms |
5120 KB |
Output is correct |
10 |
Correct |
9 ms |
5120 KB |
Output is correct |
11 |
Correct |
10 ms |
5120 KB |
Output is correct |
12 |
Correct |
9 ms |
5120 KB |
Output is correct |
13 |
Correct |
10 ms |
5120 KB |
Output is correct |
14 |
Correct |
9 ms |
5156 KB |
Output is correct |
15 |
Correct |
8 ms |
5120 KB |
Output is correct |
16 |
Correct |
9 ms |
5120 KB |
Output is correct |
17 |
Correct |
9 ms |
5120 KB |
Output is correct |
18 |
Correct |
9 ms |
5120 KB |
Output is correct |
19 |
Correct |
9 ms |
5120 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
6 ms |
2688 KB |
Output is correct |
2 |
Correct |
6 ms |
2688 KB |
Output is correct |
3 |
Correct |
6 ms |
2688 KB |
Output is correct |
4 |
Correct |
6 ms |
2740 KB |
Output is correct |
5 |
Correct |
8 ms |
5120 KB |
Output is correct |
6 |
Correct |
8 ms |
5120 KB |
Output is correct |
7 |
Correct |
8 ms |
5120 KB |
Output is correct |
8 |
Correct |
9 ms |
5120 KB |
Output is correct |
9 |
Correct |
9 ms |
5120 KB |
Output is correct |
10 |
Correct |
9 ms |
5120 KB |
Output is correct |
11 |
Correct |
10 ms |
5120 KB |
Output is correct |
12 |
Correct |
9 ms |
5120 KB |
Output is correct |
13 |
Correct |
10 ms |
5120 KB |
Output is correct |
14 |
Correct |
9 ms |
5156 KB |
Output is correct |
15 |
Correct |
8 ms |
5120 KB |
Output is correct |
16 |
Correct |
9 ms |
5120 KB |
Output is correct |
17 |
Correct |
9 ms |
5120 KB |
Output is correct |
18 |
Correct |
9 ms |
5120 KB |
Output is correct |
19 |
Correct |
9 ms |
5120 KB |
Output is correct |
20 |
Correct |
320 ms |
7904 KB |
Output is correct |
21 |
Correct |
271 ms |
7928 KB |
Output is correct |
22 |
Correct |
324 ms |
7804 KB |
Output is correct |
23 |
Correct |
341 ms |
7800 KB |
Output is correct |
24 |
Correct |
473 ms |
248056 KB |
Output is correct |
25 |
Correct |
464 ms |
248056 KB |
Output is correct |
26 |
Correct |
460 ms |
247800 KB |
Output is correct |
27 |
Correct |
414 ms |
248056 KB |
Output is correct |
28 |
Correct |
426 ms |
248008 KB |
Output is correct |
29 |
Correct |
421 ms |
248056 KB |
Output is correct |
30 |
Correct |
413 ms |
247800 KB |
Output is correct |
31 |
Correct |
429 ms |
248056 KB |
Output is correct |
32 |
Correct |
419 ms |
247672 KB |
Output is correct |
33 |
Correct |
365 ms |
247800 KB |
Output is correct |
34 |
Correct |
371 ms |
248056 KB |
Output is correct |
35 |
Correct |
368 ms |
247728 KB |
Output is correct |
36 |
Correct |
397 ms |
248184 KB |
Output is correct |
37 |
Correct |
408 ms |
247904 KB |
Output is correct |
38 |
Correct |
412 ms |
247648 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
6 ms |
2688 KB |
Output is correct |
2 |
Correct |
6 ms |
2688 KB |
Output is correct |
3 |
Correct |
6 ms |
2688 KB |
Output is correct |
4 |
Correct |
6 ms |
2740 KB |
Output is correct |
5 |
Correct |
8 ms |
5120 KB |
Output is correct |
6 |
Correct |
8 ms |
5120 KB |
Output is correct |
7 |
Correct |
8 ms |
5120 KB |
Output is correct |
8 |
Correct |
9 ms |
5120 KB |
Output is correct |
9 |
Correct |
9 ms |
5120 KB |
Output is correct |
10 |
Correct |
9 ms |
5120 KB |
Output is correct |
11 |
Correct |
10 ms |
5120 KB |
Output is correct |
12 |
Correct |
9 ms |
5120 KB |
Output is correct |
13 |
Correct |
10 ms |
5120 KB |
Output is correct |
14 |
Correct |
9 ms |
5156 KB |
Output is correct |
15 |
Correct |
8 ms |
5120 KB |
Output is correct |
16 |
Correct |
9 ms |
5120 KB |
Output is correct |
17 |
Correct |
9 ms |
5120 KB |
Output is correct |
18 |
Correct |
9 ms |
5120 KB |
Output is correct |
19 |
Correct |
9 ms |
5120 KB |
Output is correct |
20 |
Correct |
320 ms |
7904 KB |
Output is correct |
21 |
Correct |
271 ms |
7928 KB |
Output is correct |
22 |
Correct |
324 ms |
7804 KB |
Output is correct |
23 |
Correct |
341 ms |
7800 KB |
Output is correct |
24 |
Correct |
473 ms |
248056 KB |
Output is correct |
25 |
Correct |
464 ms |
248056 KB |
Output is correct |
26 |
Correct |
460 ms |
247800 KB |
Output is correct |
27 |
Correct |
414 ms |
248056 KB |
Output is correct |
28 |
Correct |
426 ms |
248008 KB |
Output is correct |
29 |
Correct |
421 ms |
248056 KB |
Output is correct |
30 |
Correct |
413 ms |
247800 KB |
Output is correct |
31 |
Correct |
429 ms |
248056 KB |
Output is correct |
32 |
Correct |
419 ms |
247672 KB |
Output is correct |
33 |
Correct |
365 ms |
247800 KB |
Output is correct |
34 |
Correct |
371 ms |
248056 KB |
Output is correct |
35 |
Correct |
368 ms |
247728 KB |
Output is correct |
36 |
Correct |
397 ms |
248184 KB |
Output is correct |
37 |
Correct |
408 ms |
247904 KB |
Output is correct |
38 |
Correct |
412 ms |
247648 KB |
Output is correct |
39 |
Correct |
510 ms |
248848 KB |
Output is correct |
40 |
Correct |
486 ms |
248056 KB |
Output is correct |
41 |
Correct |
472 ms |
248056 KB |
Output is correct |
42 |
Correct |
618 ms |
248312 KB |
Output is correct |
43 |
Correct |
488 ms |
248312 KB |
Output is correct |
44 |
Correct |
364 ms |
9208 KB |
Output is correct |
45 |
Correct |
339 ms |
8308 KB |
Output is correct |
46 |
Correct |
332 ms |
8312 KB |
Output is correct |
47 |
Correct |
347 ms |
7980 KB |
Output is correct |
48 |
Correct |
317 ms |
7928 KB |
Output is correct |
49 |
Correct |
472 ms |
248440 KB |
Output is correct |
50 |
Correct |
426 ms |
247288 KB |
Output is correct |
51 |
Correct |
304 ms |
9180 KB |
Output is correct |
52 |
Correct |
283 ms |
8056 KB |
Output is correct |
53 |
Correct |
447 ms |
248312 KB |
Output is correct |
54 |
Correct |
457 ms |
248312 KB |
Output is correct |
55 |
Correct |
400 ms |
247220 KB |
Output is correct |
56 |
Correct |
403 ms |
247288 KB |
Output is correct |
57 |
Correct |
353 ms |
8956 KB |
Output is correct |
58 |
Correct |
367 ms |
9080 KB |
Output is correct |
59 |
Correct |
312 ms |
8052 KB |
Output is correct |
60 |
Correct |
331 ms |
8056 KB |
Output is correct |
61 |
Correct |
509 ms |
247672 KB |
Output is correct |
62 |
Correct |
505 ms |
247672 KB |
Output is correct |
63 |
Correct |
525 ms |
247800 KB |
Output is correct |
64 |
Correct |
738 ms |
247672 KB |
Output is correct |
65 |
Correct |
719 ms |
247672 KB |
Output is correct |
66 |
Correct |
753 ms |
247684 KB |
Output is correct |
67 |
Correct |
414 ms |
247356 KB |
Output is correct |
68 |
Correct |
405 ms |
247292 KB |
Output is correct |
69 |
Correct |
400 ms |
247160 KB |
Output is correct |
70 |
Correct |
430 ms |
247940 KB |
Output is correct |
71 |
Correct |
408 ms |
247800 KB |
Output is correct |
72 |
Correct |
416 ms |
247928 KB |
Output is correct |
73 |
Correct |
450 ms |
247800 KB |
Output is correct |
74 |
Correct |
438 ms |
247800 KB |
Output is correct |
75 |
Correct |
441 ms |
247800 KB |
Output is correct |
76 |
Correct |
463 ms |
249368 KB |
Output is correct |
77 |
Correct |
420 ms |
248172 KB |
Output is correct |
78 |
Correct |
434 ms |
248312 KB |
Output is correct |
79 |
Correct |
316 ms |
9208 KB |
Output is correct |
80 |
Correct |
277 ms |
8312 KB |
Output is correct |
81 |
Correct |
264 ms |
7928 KB |
Output is correct |
82 |
Correct |
468 ms |
249224 KB |
Output is correct |
83 |
Correct |
473 ms |
249080 KB |
Output is correct |
84 |
Correct |
426 ms |
247928 KB |
Output is correct |
85 |
Correct |
423 ms |
247884 KB |
Output is correct |
86 |
Correct |
438 ms |
248312 KB |
Output is correct |
87 |
Correct |
438 ms |
248312 KB |
Output is correct |
88 |
Correct |
361 ms |
9208 KB |
Output is correct |
89 |
Correct |
372 ms |
9208 KB |
Output is correct |
90 |
Correct |
327 ms |
8184 KB |
Output is correct |
91 |
Correct |
342 ms |
8192 KB |
Output is correct |
92 |
Correct |
321 ms |
7928 KB |
Output is correct |
93 |
Correct |
318 ms |
7800 KB |
Output is correct |
94 |
Correct |
426 ms |
249080 KB |
Output is correct |
95 |
Correct |
424 ms |
248952 KB |
Output is correct |
96 |
Correct |
374 ms |
247944 KB |
Output is correct |
97 |
Correct |
375 ms |
247800 KB |
Output is correct |
98 |
Correct |
377 ms |
248184 KB |
Output is correct |
99 |
Correct |
374 ms |
248144 KB |
Output is correct |
100 |
Correct |
392 ms |
9208 KB |
Output is correct |
101 |
Correct |
363 ms |
9208 KB |
Output is correct |
102 |
Correct |
354 ms |
8216 KB |
Output is correct |
103 |
Correct |
352 ms |
8224 KB |
Output is correct |
104 |
Correct |
346 ms |
7800 KB |
Output is correct |
105 |
Correct |
339 ms |
7800 KB |
Output is correct |
106 |
Correct |
446 ms |
249208 KB |
Output is correct |
107 |
Correct |
450 ms |
248884 KB |
Output is correct |
108 |
Correct |
415 ms |
247928 KB |
Output is correct |
109 |
Correct |
410 ms |
247928 KB |
Output is correct |
110 |
Correct |
420 ms |
248312 KB |
Output is correct |
111 |
Correct |
414 ms |
248440 KB |
Output is correct |
112 |
Correct |
354 ms |
9208 KB |
Output is correct |
113 |
Correct |
373 ms |
9208 KB |
Output is correct |
114 |
Correct |
327 ms |
8196 KB |
Output is correct |
115 |
Correct |
331 ms |
8184 KB |
Output is correct |
116 |
Correct |
310 ms |
7800 KB |
Output is correct |
117 |
Correct |
339 ms |
8060 KB |
Output is correct |
118 |
Correct |
414 ms |
247416 KB |
Output is correct |
119 |
Correct |
411 ms |
247160 KB |
Output is correct |
120 |
Correct |
401 ms |
247288 KB |
Output is correct |
121 |
Correct |
407 ms |
247416 KB |
Output is correct |
122 |
Correct |
419 ms |
247288 KB |
Output is correct |
123 |
Correct |
415 ms |
247288 KB |
Output is correct |
124 |
Correct |
420 ms |
247288 KB |
Output is correct |
125 |
Correct |
400 ms |
247160 KB |
Output is correct |
126 |
Correct |
401 ms |
247160 KB |
Output is correct |