#include <bits/stdc++.h>
#define ALL(x) x.begin(), x.end()
#define pii pair<int,int>
const int MAXN = 1e5 + 64;
const int SQRT = 30;
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][5*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 |
1 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 |
2648 KB |
Output is correct |
5 |
Correct |
3 ms |
4004 KB |
Output is correct |
6 |
Correct |
3 ms |
3932 KB |
Output is correct |
7 |
Correct |
3 ms |
3932 KB |
Output is correct |
8 |
Correct |
3 ms |
3932 KB |
Output is correct |
9 |
Correct |
3 ms |
3932 KB |
Output is correct |
10 |
Correct |
3 ms |
3932 KB |
Output is correct |
11 |
Correct |
3 ms |
3932 KB |
Output is correct |
12 |
Correct |
3 ms |
3932 KB |
Output is correct |
13 |
Correct |
3 ms |
3932 KB |
Output is correct |
14 |
Correct |
3 ms |
3932 KB |
Output is correct |
15 |
Correct |
3 ms |
3932 KB |
Output is correct |
16 |
Correct |
3 ms |
3932 KB |
Output is correct |
17 |
Correct |
3 ms |
3932 KB |
Output is correct |
18 |
Correct |
3 ms |
3932 KB |
Output is correct |
19 |
Correct |
3 ms |
3928 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 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 |
2648 KB |
Output is correct |
5 |
Correct |
3 ms |
4004 KB |
Output is correct |
6 |
Correct |
3 ms |
3932 KB |
Output is correct |
7 |
Correct |
3 ms |
3932 KB |
Output is correct |
8 |
Correct |
3 ms |
3932 KB |
Output is correct |
9 |
Correct |
3 ms |
3932 KB |
Output is correct |
10 |
Correct |
3 ms |
3932 KB |
Output is correct |
11 |
Correct |
3 ms |
3932 KB |
Output is correct |
12 |
Correct |
3 ms |
3932 KB |
Output is correct |
13 |
Correct |
3 ms |
3932 KB |
Output is correct |
14 |
Correct |
3 ms |
3932 KB |
Output is correct |
15 |
Correct |
3 ms |
3932 KB |
Output is correct |
16 |
Correct |
3 ms |
3932 KB |
Output is correct |
17 |
Correct |
3 ms |
3932 KB |
Output is correct |
18 |
Correct |
3 ms |
3932 KB |
Output is correct |
19 |
Correct |
3 ms |
3928 KB |
Output is correct |
20 |
Correct |
94 ms |
6736 KB |
Output is correct |
21 |
Correct |
90 ms |
6676 KB |
Output is correct |
22 |
Correct |
92 ms |
6736 KB |
Output is correct |
23 |
Correct |
86 ms |
6740 KB |
Output is correct |
24 |
Correct |
216 ms |
130616 KB |
Output is correct |
25 |
Correct |
222 ms |
130648 KB |
Output is correct |
26 |
Correct |
233 ms |
130388 KB |
Output is correct |
27 |
Correct |
156 ms |
130900 KB |
Output is correct |
28 |
Correct |
149 ms |
130896 KB |
Output is correct |
29 |
Correct |
149 ms |
130744 KB |
Output is correct |
30 |
Correct |
165 ms |
130952 KB |
Output is correct |
31 |
Correct |
188 ms |
131152 KB |
Output is correct |
32 |
Correct |
162 ms |
130896 KB |
Output is correct |
33 |
Correct |
152 ms |
130640 KB |
Output is correct |
34 |
Correct |
177 ms |
130456 KB |
Output is correct |
35 |
Correct |
149 ms |
130384 KB |
Output is correct |
36 |
Correct |
147 ms |
130640 KB |
Output is correct |
37 |
Correct |
197 ms |
130412 KB |
Output is correct |
38 |
Correct |
156 ms |
130384 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 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 |
2648 KB |
Output is correct |
5 |
Correct |
3 ms |
4004 KB |
Output is correct |
6 |
Correct |
3 ms |
3932 KB |
Output is correct |
7 |
Correct |
3 ms |
3932 KB |
Output is correct |
8 |
Correct |
3 ms |
3932 KB |
Output is correct |
9 |
Correct |
3 ms |
3932 KB |
Output is correct |
10 |
Correct |
3 ms |
3932 KB |
Output is correct |
11 |
Correct |
3 ms |
3932 KB |
Output is correct |
12 |
Correct |
3 ms |
3932 KB |
Output is correct |
13 |
Correct |
3 ms |
3932 KB |
Output is correct |
14 |
Correct |
3 ms |
3932 KB |
Output is correct |
15 |
Correct |
3 ms |
3932 KB |
Output is correct |
16 |
Correct |
3 ms |
3932 KB |
Output is correct |
17 |
Correct |
3 ms |
3932 KB |
Output is correct |
18 |
Correct |
3 ms |
3932 KB |
Output is correct |
19 |
Correct |
3 ms |
3928 KB |
Output is correct |
20 |
Correct |
94 ms |
6736 KB |
Output is correct |
21 |
Correct |
90 ms |
6676 KB |
Output is correct |
22 |
Correct |
92 ms |
6736 KB |
Output is correct |
23 |
Correct |
86 ms |
6740 KB |
Output is correct |
24 |
Correct |
216 ms |
130616 KB |
Output is correct |
25 |
Correct |
222 ms |
130648 KB |
Output is correct |
26 |
Correct |
233 ms |
130388 KB |
Output is correct |
27 |
Correct |
156 ms |
130900 KB |
Output is correct |
28 |
Correct |
149 ms |
130896 KB |
Output is correct |
29 |
Correct |
149 ms |
130744 KB |
Output is correct |
30 |
Correct |
165 ms |
130952 KB |
Output is correct |
31 |
Correct |
188 ms |
131152 KB |
Output is correct |
32 |
Correct |
162 ms |
130896 KB |
Output is correct |
33 |
Correct |
152 ms |
130640 KB |
Output is correct |
34 |
Correct |
177 ms |
130456 KB |
Output is correct |
35 |
Correct |
149 ms |
130384 KB |
Output is correct |
36 |
Correct |
147 ms |
130640 KB |
Output is correct |
37 |
Correct |
197 ms |
130412 KB |
Output is correct |
38 |
Correct |
156 ms |
130384 KB |
Output is correct |
39 |
Correct |
229 ms |
131924 KB |
Output is correct |
40 |
Correct |
221 ms |
131152 KB |
Output is correct |
41 |
Correct |
220 ms |
130896 KB |
Output is correct |
42 |
Correct |
226 ms |
130896 KB |
Output is correct |
43 |
Correct |
205 ms |
130896 KB |
Output is correct |
44 |
Correct |
115 ms |
7956 KB |
Output is correct |
45 |
Correct |
98 ms |
7248 KB |
Output is correct |
46 |
Correct |
101 ms |
6996 KB |
Output is correct |
47 |
Correct |
103 ms |
6900 KB |
Output is correct |
48 |
Correct |
94 ms |
6736 KB |
Output is correct |
49 |
Correct |
186 ms |
131724 KB |
Output is correct |
50 |
Correct |
718 ms |
130904 KB |
Output is correct |
51 |
Correct |
115 ms |
7724 KB |
Output is correct |
52 |
Correct |
359 ms |
6872 KB |
Output is correct |
53 |
Correct |
173 ms |
131388 KB |
Output is correct |
54 |
Correct |
209 ms |
131112 KB |
Output is correct |
55 |
Correct |
641 ms |
130128 KB |
Output is correct |
56 |
Correct |
769 ms |
130132 KB |
Output is correct |
57 |
Correct |
111 ms |
7760 KB |
Output is correct |
58 |
Correct |
113 ms |
7764 KB |
Output is correct |
59 |
Correct |
369 ms |
6996 KB |
Output is correct |
60 |
Correct |
334 ms |
6960 KB |
Output is correct |
61 |
Correct |
217 ms |
130640 KB |
Output is correct |
62 |
Correct |
210 ms |
130388 KB |
Output is correct |
63 |
Correct |
237 ms |
130388 KB |
Output is correct |
64 |
Correct |
328 ms |
130640 KB |
Output is correct |
65 |
Correct |
311 ms |
130316 KB |
Output is correct |
66 |
Correct |
361 ms |
130132 KB |
Output is correct |
67 |
Correct |
445 ms |
130644 KB |
Output is correct |
68 |
Correct |
429 ms |
130132 KB |
Output is correct |
69 |
Correct |
495 ms |
130096 KB |
Output is correct |
70 |
Correct |
160 ms |
130740 KB |
Output is correct |
71 |
Correct |
158 ms |
130388 KB |
Output is correct |
72 |
Correct |
187 ms |
130388 KB |
Output is correct |
73 |
Correct |
168 ms |
130676 KB |
Output is correct |
74 |
Correct |
180 ms |
130384 KB |
Output is correct |
75 |
Correct |
214 ms |
130416 KB |
Output is correct |
76 |
Correct |
171 ms |
132688 KB |
Output is correct |
77 |
Correct |
151 ms |
131324 KB |
Output is correct |
78 |
Correct |
146 ms |
131276 KB |
Output is correct |
79 |
Correct |
118 ms |
8104 KB |
Output is correct |
80 |
Correct |
95 ms |
7184 KB |
Output is correct |
81 |
Correct |
92 ms |
6644 KB |
Output is correct |
82 |
Correct |
187 ms |
132680 KB |
Output is correct |
83 |
Correct |
219 ms |
132440 KB |
Output is correct |
84 |
Correct |
165 ms |
131260 KB |
Output is correct |
85 |
Correct |
199 ms |
131364 KB |
Output is correct |
86 |
Correct |
168 ms |
131400 KB |
Output is correct |
87 |
Correct |
196 ms |
131408 KB |
Output is correct |
88 |
Correct |
110 ms |
8016 KB |
Output is correct |
89 |
Correct |
112 ms |
8080 KB |
Output is correct |
90 |
Correct |
95 ms |
6996 KB |
Output is correct |
91 |
Correct |
102 ms |
6992 KB |
Output is correct |
92 |
Correct |
100 ms |
6736 KB |
Output is correct |
93 |
Correct |
89 ms |
6736 KB |
Output is correct |
94 |
Correct |
177 ms |
131920 KB |
Output is correct |
95 |
Correct |
206 ms |
131920 KB |
Output is correct |
96 |
Correct |
158 ms |
130896 KB |
Output is correct |
97 |
Correct |
177 ms |
130900 KB |
Output is correct |
98 |
Correct |
158 ms |
130900 KB |
Output is correct |
99 |
Correct |
182 ms |
130900 KB |
Output is correct |
100 |
Correct |
111 ms |
8016 KB |
Output is correct |
101 |
Correct |
108 ms |
8016 KB |
Output is correct |
102 |
Correct |
99 ms |
6992 KB |
Output is correct |
103 |
Correct |
95 ms |
6992 KB |
Output is correct |
104 |
Correct |
91 ms |
6736 KB |
Output is correct |
105 |
Correct |
90 ms |
6740 KB |
Output is correct |
106 |
Correct |
182 ms |
131920 KB |
Output is correct |
107 |
Correct |
206 ms |
132180 KB |
Output is correct |
108 |
Correct |
162 ms |
130896 KB |
Output is correct |
109 |
Correct |
183 ms |
130900 KB |
Output is correct |
110 |
Correct |
150 ms |
130900 KB |
Output is correct |
111 |
Correct |
182 ms |
130896 KB |
Output is correct |
112 |
Correct |
111 ms |
8016 KB |
Output is correct |
113 |
Correct |
131 ms |
8016 KB |
Output is correct |
114 |
Correct |
93 ms |
6992 KB |
Output is correct |
115 |
Correct |
100 ms |
6996 KB |
Output is correct |
116 |
Correct |
94 ms |
6684 KB |
Output is correct |
117 |
Correct |
92 ms |
6740 KB |
Output is correct |
118 |
Execution timed out |
2079 ms |
130728 KB |
Time limit exceeded |
119 |
Halted |
0 ms |
0 KB |
- |