#include <bits/stdc++.h>
using namespace std;
void maxi(int &x, int y) {
if(x < y) x = y;
}
int main() {
ios::sync_with_stdio(0); cin.tie(0);
const int C = 150;
int n, m, q;
cin >> n >> m >> q;
vector<vector<int>> g(n+1);
vector<vector<int>> r(n+1);
for(int i = 1; i <= m; ++i) {
int u, v; cin >> u >> v;
g[u].push_back(v);
r[v].push_back(u);
}
vector<int> dst(n+1);
vector<vector<pair<int, int>>> list(n+1);
for(int i = 1; i <= n; ++i) {
for(int x : r[i]) {
for(auto p : list[x]) maxi(dst[p.second], p.first);
}
for(int x : r[i]) {
for(auto p : list[x]) {
if(dst[p.second] == p.first) {
list[i].push_back({p.first+1, p.second});
dst[p.second] = -1;
}
}
}
list[i].push_back({0, i});
sort(list[i].rbegin(), list[i].rend());
while((int)list[i].size() > C) list[i].pop_back();
for(int x : r[i]) {
for(auto p : list[x]) dst[p.second] = 0;
}
}
vector<bool> blocked(n+1);
while(q--) {
int t, x; cin >> t >> x;
vector<int> v(x);
for(int i = 0; i < x; ++i) {
cin >> v[i];
blocked[v[i]] = 1;
}
int ans = -1;
if(x < C) {
for(pair<int, int> p : list[t]) {
if(!blocked[p.second]) {
ans = p.first;
break;
}
}
} else {
vector<int> dp(n+1, -1e6);
for(int i = 1; i <= t; ++i) {
if(!blocked[i]) {
dp[i] = 0;
}
for(int x : r[i]) {
maxi(dp[i], dp[x]+1);
}
}
ans = dp[t];
}
if(ans < 0) ans = -1;
cout << ans << '\n';
for(int i : v) blocked[i] = 0;
}
}
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
204 KB |
Output is correct |
2 |
Correct |
1 ms |
204 KB |
Output is correct |
3 |
Correct |
1 ms |
204 KB |
Output is correct |
4 |
Correct |
1 ms |
204 KB |
Output is correct |
5 |
Correct |
5 ms |
844 KB |
Output is correct |
6 |
Correct |
4 ms |
844 KB |
Output is correct |
7 |
Correct |
4 ms |
844 KB |
Output is correct |
8 |
Correct |
8 ms |
2252 KB |
Output is correct |
9 |
Correct |
8 ms |
2252 KB |
Output is correct |
10 |
Correct |
7 ms |
2252 KB |
Output is correct |
11 |
Correct |
8 ms |
2124 KB |
Output is correct |
12 |
Correct |
7 ms |
1484 KB |
Output is correct |
13 |
Correct |
8 ms |
2124 KB |
Output is correct |
14 |
Correct |
7 ms |
1484 KB |
Output is correct |
15 |
Correct |
7 ms |
1100 KB |
Output is correct |
16 |
Correct |
7 ms |
1484 KB |
Output is correct |
17 |
Correct |
9 ms |
1680 KB |
Output is correct |
18 |
Correct |
8 ms |
1236 KB |
Output is correct |
19 |
Correct |
8 ms |
1820 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
204 KB |
Output is correct |
2 |
Correct |
1 ms |
204 KB |
Output is correct |
3 |
Correct |
1 ms |
204 KB |
Output is correct |
4 |
Correct |
1 ms |
204 KB |
Output is correct |
5 |
Correct |
5 ms |
844 KB |
Output is correct |
6 |
Correct |
4 ms |
844 KB |
Output is correct |
7 |
Correct |
4 ms |
844 KB |
Output is correct |
8 |
Correct |
8 ms |
2252 KB |
Output is correct |
9 |
Correct |
8 ms |
2252 KB |
Output is correct |
10 |
Correct |
7 ms |
2252 KB |
Output is correct |
11 |
Correct |
8 ms |
2124 KB |
Output is correct |
12 |
Correct |
7 ms |
1484 KB |
Output is correct |
13 |
Correct |
8 ms |
2124 KB |
Output is correct |
14 |
Correct |
7 ms |
1484 KB |
Output is correct |
15 |
Correct |
7 ms |
1100 KB |
Output is correct |
16 |
Correct |
7 ms |
1484 KB |
Output is correct |
17 |
Correct |
9 ms |
1680 KB |
Output is correct |
18 |
Correct |
8 ms |
1236 KB |
Output is correct |
19 |
Correct |
8 ms |
1820 KB |
Output is correct |
20 |
Correct |
191 ms |
5424 KB |
Output is correct |
21 |
Correct |
193 ms |
5384 KB |
Output is correct |
22 |
Correct |
172 ms |
5372 KB |
Output is correct |
23 |
Correct |
236 ms |
5412 KB |
Output is correct |
24 |
Correct |
1118 ms |
161240 KB |
Output is correct |
25 |
Correct |
1162 ms |
162316 KB |
Output is correct |
26 |
Correct |
1166 ms |
163204 KB |
Output is correct |
27 |
Correct |
987 ms |
217264 KB |
Output is correct |
28 |
Correct |
863 ms |
217156 KB |
Output is correct |
29 |
Correct |
837 ms |
217236 KB |
Output is correct |
30 |
Correct |
816 ms |
216348 KB |
Output is correct |
31 |
Correct |
1010 ms |
213524 KB |
Output is correct |
32 |
Correct |
813 ms |
216256 KB |
Output is correct |
33 |
Correct |
713 ms |
138904 KB |
Output is correct |
34 |
Correct |
941 ms |
159472 KB |
Output is correct |
35 |
Correct |
658 ms |
137920 KB |
Output is correct |
36 |
Correct |
793 ms |
178012 KB |
Output is correct |
37 |
Correct |
1057 ms |
172004 KB |
Output is correct |
38 |
Correct |
783 ms |
178448 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
204 KB |
Output is correct |
2 |
Correct |
1 ms |
204 KB |
Output is correct |
3 |
Correct |
1 ms |
204 KB |
Output is correct |
4 |
Correct |
1 ms |
204 KB |
Output is correct |
5 |
Correct |
5 ms |
844 KB |
Output is correct |
6 |
Correct |
4 ms |
844 KB |
Output is correct |
7 |
Correct |
4 ms |
844 KB |
Output is correct |
8 |
Correct |
8 ms |
2252 KB |
Output is correct |
9 |
Correct |
8 ms |
2252 KB |
Output is correct |
10 |
Correct |
7 ms |
2252 KB |
Output is correct |
11 |
Correct |
8 ms |
2124 KB |
Output is correct |
12 |
Correct |
7 ms |
1484 KB |
Output is correct |
13 |
Correct |
8 ms |
2124 KB |
Output is correct |
14 |
Correct |
7 ms |
1484 KB |
Output is correct |
15 |
Correct |
7 ms |
1100 KB |
Output is correct |
16 |
Correct |
7 ms |
1484 KB |
Output is correct |
17 |
Correct |
9 ms |
1680 KB |
Output is correct |
18 |
Correct |
8 ms |
1236 KB |
Output is correct |
19 |
Correct |
8 ms |
1820 KB |
Output is correct |
20 |
Correct |
191 ms |
5424 KB |
Output is correct |
21 |
Correct |
193 ms |
5384 KB |
Output is correct |
22 |
Correct |
172 ms |
5372 KB |
Output is correct |
23 |
Correct |
236 ms |
5412 KB |
Output is correct |
24 |
Correct |
1118 ms |
161240 KB |
Output is correct |
25 |
Correct |
1162 ms |
162316 KB |
Output is correct |
26 |
Correct |
1166 ms |
163204 KB |
Output is correct |
27 |
Correct |
987 ms |
217264 KB |
Output is correct |
28 |
Correct |
863 ms |
217156 KB |
Output is correct |
29 |
Correct |
837 ms |
217236 KB |
Output is correct |
30 |
Correct |
816 ms |
216348 KB |
Output is correct |
31 |
Correct |
1010 ms |
213524 KB |
Output is correct |
32 |
Correct |
813 ms |
216256 KB |
Output is correct |
33 |
Correct |
713 ms |
138904 KB |
Output is correct |
34 |
Correct |
941 ms |
159472 KB |
Output is correct |
35 |
Correct |
658 ms |
137920 KB |
Output is correct |
36 |
Correct |
793 ms |
178012 KB |
Output is correct |
37 |
Correct |
1057 ms |
172004 KB |
Output is correct |
38 |
Correct |
783 ms |
178448 KB |
Output is correct |
39 |
Correct |
1127 ms |
161740 KB |
Output is correct |
40 |
Correct |
1046 ms |
160292 KB |
Output is correct |
41 |
Correct |
1038 ms |
161364 KB |
Output is correct |
42 |
Correct |
1210 ms |
161188 KB |
Output is correct |
43 |
Correct |
1140 ms |
164560 KB |
Output is correct |
44 |
Correct |
219 ms |
7416 KB |
Output is correct |
45 |
Correct |
214 ms |
6724 KB |
Output is correct |
46 |
Correct |
187 ms |
6476 KB |
Output is correct |
47 |
Correct |
200 ms |
6340 KB |
Output is correct |
48 |
Correct |
187 ms |
6152 KB |
Output is correct |
49 |
Correct |
861 ms |
219948 KB |
Output is correct |
50 |
Correct |
801 ms |
218860 KB |
Output is correct |
51 |
Correct |
218 ms |
7324 KB |
Output is correct |
52 |
Correct |
188 ms |
6464 KB |
Output is correct |
53 |
Correct |
816 ms |
180204 KB |
Output is correct |
54 |
Correct |
1077 ms |
172628 KB |
Output is correct |
55 |
Correct |
778 ms |
179164 KB |
Output is correct |
56 |
Correct |
1044 ms |
175784 KB |
Output is correct |
57 |
Correct |
241 ms |
7236 KB |
Output is correct |
58 |
Correct |
226 ms |
7292 KB |
Output is correct |
59 |
Correct |
189 ms |
6444 KB |
Output is correct |
60 |
Correct |
202 ms |
6484 KB |
Output is correct |
61 |
Correct |
891 ms |
219220 KB |
Output is correct |
62 |
Correct |
909 ms |
180412 KB |
Output is correct |
63 |
Correct |
1124 ms |
172024 KB |
Output is correct |
64 |
Correct |
1057 ms |
219316 KB |
Output is correct |
65 |
Correct |
1199 ms |
179692 KB |
Output is correct |
66 |
Correct |
1505 ms |
173096 KB |
Output is correct |
67 |
Correct |
1252 ms |
219160 KB |
Output is correct |
68 |
Correct |
1617 ms |
180356 KB |
Output is correct |
69 |
Correct |
1906 ms |
172540 KB |
Output is correct |
70 |
Correct |
848 ms |
219376 KB |
Output is correct |
71 |
Correct |
826 ms |
180324 KB |
Output is correct |
72 |
Correct |
1041 ms |
172648 KB |
Output is correct |
73 |
Correct |
897 ms |
219324 KB |
Output is correct |
74 |
Correct |
862 ms |
180176 KB |
Output is correct |
75 |
Correct |
1108 ms |
174240 KB |
Output is correct |
76 |
Correct |
889 ms |
220352 KB |
Output is correct |
77 |
Correct |
1086 ms |
219456 KB |
Output is correct |
78 |
Correct |
848 ms |
219408 KB |
Output is correct |
79 |
Correct |
226 ms |
7528 KB |
Output is correct |
80 |
Correct |
213 ms |
6608 KB |
Output is correct |
81 |
Correct |
184 ms |
6080 KB |
Output is correct |
82 |
Correct |
886 ms |
219492 KB |
Output is correct |
83 |
Correct |
1104 ms |
216840 KB |
Output is correct |
84 |
Correct |
1016 ms |
218656 KB |
Output is correct |
85 |
Correct |
1290 ms |
217276 KB |
Output is correct |
86 |
Correct |
813 ms |
218684 KB |
Output is correct |
87 |
Correct |
1066 ms |
216420 KB |
Output is correct |
88 |
Correct |
218 ms |
7492 KB |
Output is correct |
89 |
Correct |
224 ms |
7392 KB |
Output is correct |
90 |
Correct |
217 ms |
6468 KB |
Output is correct |
91 |
Correct |
227 ms |
6468 KB |
Output is correct |
92 |
Correct |
186 ms |
6208 KB |
Output is correct |
93 |
Correct |
185 ms |
6212 KB |
Output is correct |
94 |
Correct |
717 ms |
142148 KB |
Output is correct |
95 |
Correct |
1012 ms |
170948 KB |
Output is correct |
96 |
Correct |
947 ms |
140624 KB |
Output is correct |
97 |
Correct |
1283 ms |
171820 KB |
Output is correct |
98 |
Correct |
674 ms |
140988 KB |
Output is correct |
99 |
Correct |
964 ms |
167016 KB |
Output is correct |
100 |
Correct |
235 ms |
7496 KB |
Output is correct |
101 |
Correct |
233 ms |
7424 KB |
Output is correct |
102 |
Correct |
229 ms |
6612 KB |
Output is correct |
103 |
Correct |
238 ms |
6592 KB |
Output is correct |
104 |
Correct |
198 ms |
6084 KB |
Output is correct |
105 |
Correct |
198 ms |
6212 KB |
Output is correct |
106 |
Correct |
821 ms |
180508 KB |
Output is correct |
107 |
Correct |
1090 ms |
174756 KB |
Output is correct |
108 |
Correct |
1104 ms |
180796 KB |
Output is correct |
109 |
Correct |
1318 ms |
172432 KB |
Output is correct |
110 |
Correct |
795 ms |
180924 KB |
Output is correct |
111 |
Correct |
1044 ms |
172744 KB |
Output is correct |
112 |
Correct |
218 ms |
7620 KB |
Output is correct |
113 |
Correct |
219 ms |
7452 KB |
Output is correct |
114 |
Correct |
224 ms |
6632 KB |
Output is correct |
115 |
Correct |
227 ms |
6560 KB |
Output is correct |
116 |
Correct |
183 ms |
6088 KB |
Output is correct |
117 |
Correct |
187 ms |
6160 KB |
Output is correct |
118 |
Correct |
814 ms |
218692 KB |
Output is correct |
119 |
Correct |
781 ms |
180064 KB |
Output is correct |
120 |
Correct |
1022 ms |
173520 KB |
Output is correct |
121 |
Correct |
823 ms |
218816 KB |
Output is correct |
122 |
Correct |
778 ms |
179444 KB |
Output is correct |
123 |
Correct |
1018 ms |
173272 KB |
Output is correct |
124 |
Correct |
815 ms |
218688 KB |
Output is correct |
125 |
Correct |
784 ms |
180324 KB |
Output is correct |
126 |
Correct |
1000 ms |
173176 KB |
Output is correct |