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답안 #1007356

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
1007356 2024-06-24T17:08:32 Z phoenix Traffic (IOI10_traffic) C++17
100 / 100
 635 ms 170836 KB 
#include "traffic.h"
#include <vector>
#include <iostream>

const int N = 1000000 + 100;

std::vector<int> g[N];
int sz[N];
int pr[N];

void dfs(int v) {
   for (int to : g[v]) if (to != pr[v]) {
      pr[to] = v;
      dfs(to);
      sz[v] += sz[to];
   }
}

int LocateCentre(int N, int p[], int S[], int D[]) {
   for (int i = 0; i < N; i++)
      sz[i] = p[i];
   for (int i = 0; i < N - 1; i++) {
      g[S[i]].push_back(D[i]);
      g[D[i]].push_back(S[i]);
   }
   dfs(0);
   int ver = 0, mx = 0;
   for (int to : g[ver]) mx = std::max(mx, sz[to]);
   
   for (int i = 1; i < N; i++) {
      int val = 0;
      for (int to : g[i]) if (to != pr[i])
         val = std::max(val, sz[to]);
      val = std::max(val, sz[0] - sz[i]);
      if (val < mx) {
         mx = val;
         ver = i;
      }
   }
   return ver;
}

Subtask #1
25.0 / 25.0

# 결과 실행 시간 메모리 Grader output
1 Correct 9 ms 23968 KB Output is correct
2 Correct 10 ms 23900 KB Output is correct
3 Correct 10 ms 23940 KB Output is correct
4 Correct 9 ms 23900 KB Output is correct
5 Correct 10 ms 23816 KB Output is correct
6 Correct 10 ms 23900 KB Output is correct
7 Correct 11 ms 23720 KB Output is correct
8 Correct 11 ms 23900 KB Output is correct
9 Correct 10 ms 23964 KB Output is correct
10 Correct 10 ms 23900 KB Output is correct
11 Correct 10 ms 23872 KB Output is correct
12 Correct 10 ms 23900 KB Output is correct
13 Correct 10 ms 23900 KB Output is correct
14 Correct 10 ms 23900 KB Output is correct
15 Correct 10 ms 23900 KB Output is correct
16 Correct 11 ms 23968 KB Output is correct
17 Correct 10 ms 23900 KB Output is correct
18 Correct 10 ms 23900 KB Output is correct
19 Correct 10 ms 23900 KB Output is correct
20 Correct 10 ms 23900 KB Output is correct
21 Correct 10 ms 23900 KB Output is correct
22 Correct 14 ms 23900 KB Output is correct
23 Correct 11 ms 23900 KB Output is correct
24 Correct 10 ms 23872 KB Output is correct
25 Correct 11 ms 23900 KB Output is correct
26 Correct 11 ms 23900 KB Output is correct
27 Correct 11 ms 23900 KB Output is correct
28 Correct 10 ms 23928 KB Output is correct
29 Correct 12 ms 23900 KB Output is correct
30 Correct 10 ms 23900 KB Output is correct
31 Correct 10 ms 23900 KB Output is correct
32 Correct 10 ms 23900 KB Output is correct
33 Correct 10 ms 23960 KB Output is correct
34 Correct 10 ms 23900 KB Output is correct
35 Correct 10 ms 24016 KB Output is correct
36 Correct 10 ms 23900 KB Output is correct
37 Correct 13 ms 23876 KB Output is correct
38 Correct 9 ms 23900 KB Output is correct
39 Correct 10 ms 24080 KB Output is correct
40 Correct 10 ms 23932 KB Output is correct
41 Correct 11 ms 23900 KB Output is correct
42 Correct 10 ms 23900 KB Output is correct
43 Correct 9 ms 23796 KB Output is correct
44 Correct 10 ms 23816 KB Output is correct
45 Correct 12 ms 23900 KB Output is correct
46 Correct 10 ms 23900 KB Output is correct
47 Correct 10 ms 23800 KB Output is correct

Subtask #2
25.0 / 25.0

# 결과 실행 시간 메모리 Grader output
1 Correct 9 ms 23968 KB Output is correct
2 Correct 10 ms 23900 KB Output is correct
3 Correct 10 ms 23940 KB Output is correct
4 Correct 9 ms 23900 KB Output is correct
5 Correct 10 ms 23816 KB Output is correct
6 Correct 10 ms 23900 KB Output is correct
7 Correct 11 ms 23720 KB Output is correct
8 Correct 11 ms 23900 KB Output is correct
9 Correct 10 ms 23964 KB Output is correct
10 Correct 10 ms 23900 KB Output is correct
11 Correct 10 ms 23872 KB Output is correct
12 Correct 10 ms 23900 KB Output is correct
13 Correct 10 ms 23900 KB Output is correct
14 Correct 10 ms 23900 KB Output is correct
15 Correct 10 ms 23900 KB Output is correct
16 Correct 11 ms 23968 KB Output is correct
17 Correct 10 ms 23900 KB Output is correct
18 Correct 10 ms 23900 KB Output is correct
19 Correct 10 ms 23900 KB Output is correct
20 Correct 10 ms 23900 KB Output is correct
21 Correct 10 ms 23900 KB Output is correct
22 Correct 14 ms 23900 KB Output is correct
23 Correct 11 ms 23900 KB Output is correct
24 Correct 10 ms 23872 KB Output is correct
25 Correct 11 ms 23900 KB Output is correct
26 Correct 11 ms 23900 KB Output is correct
27 Correct 11 ms 23900 KB Output is correct
28 Correct 10 ms 23928 KB Output is correct
29 Correct 12 ms 23900 KB Output is correct
30 Correct 10 ms 23900 KB Output is correct
31 Correct 10 ms 23900 KB Output is correct
32 Correct 10 ms 23900 KB Output is correct
33 Correct 10 ms 23960 KB Output is correct
34 Correct 10 ms 23900 KB Output is correct
35 Correct 10 ms 24016 KB Output is correct
36 Correct 10 ms 23900 KB Output is correct
37 Correct 13 ms 23876 KB Output is correct
38 Correct 9 ms 23900 KB Output is correct
39 Correct 10 ms 24080 KB Output is correct
40 Correct 10 ms 23932 KB Output is correct
41 Correct 11 ms 23900 KB Output is correct
42 Correct 10 ms 23900 KB Output is correct
43 Correct 9 ms 23796 KB Output is correct
44 Correct 10 ms 23816 KB Output is correct
45 Correct 12 ms 23900 KB Output is correct
46 Correct 10 ms 23900 KB Output is correct
47 Correct 10 ms 23800 KB Output is correct
48 Correct 13 ms 24156 KB Output is correct
49 Correct 10 ms 23900 KB Output is correct
50 Correct 10 ms 23844 KB Output is correct
51 Correct 10 ms 23900 KB Output is correct
52 Correct 10 ms 23900 KB Output is correct
53 Correct 11 ms 23964 KB Output is correct
54 Correct 11 ms 23900 KB Output is correct
55 Correct 10 ms 23796 KB Output is correct
56 Correct 10 ms 23900 KB Output is correct
57 Correct 11 ms 23940 KB Output is correct
58 Correct 10 ms 23900 KB Output is correct
59 Correct 11 ms 23900 KB Output is correct
60 Correct 9 ms 23904 KB Output is correct
61 Correct 10 ms 23900 KB Output is correct
62 Correct 10 ms 23900 KB Output is correct
63 Correct 10 ms 23900 KB Output is correct
64 Correct 9 ms 23900 KB Output is correct
65 Correct 10 ms 23968 KB Output is correct
66 Correct 10 ms 23900 KB Output is correct
67 Correct 10 ms 23948 KB Output is correct
68 Correct 23 ms 31068 KB Output is correct
69 Correct 39 ms 38492 KB Output is correct
70 Correct 13 ms 23900 KB Output is correct
71 Correct 53 ms 45908 KB Output is correct
72 Correct 67 ms 53076 KB Output is correct
73 Correct 87 ms 60376 KB Output is correct
74 Correct 95 ms 67856 KB Output is correct
75 Correct 119 ms 75348 KB Output is correct
76 Correct 126 ms 82516 KB Output is correct
77 Correct 140 ms 89940 KB Output is correct
78 Correct 146 ms 97616 KB Output is correct
79 Correct 158 ms 104784 KB Output is correct
80 Correct 173 ms 111956 KB Output is correct
81 Correct 9 ms 23900 KB Output is correct
82 Correct 202 ms 119380 KB Output is correct
83 Correct 216 ms 126800 KB Output is correct
84 Correct 221 ms 134160 KB Output is correct
85 Correct 281 ms 141456 KB Output is correct
86 Correct 257 ms 148888 KB Output is correct
87 Correct 291 ms 156024 KB Output is correct
88 Correct 275 ms 163408 KB Output is correct
89 Correct 312 ms 170836 KB Output is correct
90 Correct 9 ms 23900 KB Output is correct
91 Correct 9 ms 23940 KB Output is correct
92 Correct 10 ms 23900 KB Output is correct
93 Correct 10 ms 23788 KB Output is correct
94 Correct 9 ms 23900 KB Output is correct

Subtask #3
25.0 / 25.0

# 결과 실행 시간 메모리 Grader output
1 Correct 9 ms 23968 KB Output is correct
2 Correct 10 ms 23900 KB Output is correct
3 Correct 10 ms 23940 KB Output is correct
4 Correct 9 ms 23900 KB Output is correct
5 Correct 10 ms 23816 KB Output is correct
6 Correct 10 ms 23900 KB Output is correct
7 Correct 11 ms 23720 KB Output is correct
8 Correct 11 ms 23900 KB Output is correct
9 Correct 10 ms 23964 KB Output is correct
10 Correct 10 ms 23900 KB Output is correct
11 Correct 10 ms 23872 KB Output is correct
12 Correct 10 ms 23900 KB Output is correct
13 Correct 10 ms 23900 KB Output is correct
14 Correct 10 ms 23900 KB Output is correct
15 Correct 10 ms 23900 KB Output is correct
16 Correct 11 ms 23968 KB Output is correct
17 Correct 10 ms 23900 KB Output is correct
18 Correct 10 ms 23900 KB Output is correct
19 Correct 10 ms 23900 KB Output is correct
20 Correct 10 ms 23900 KB Output is correct
21 Correct 10 ms 23900 KB Output is correct
22 Correct 14 ms 23900 KB Output is correct
23 Correct 11 ms 23900 KB Output is correct
24 Correct 10 ms 23872 KB Output is correct
25 Correct 11 ms 23900 KB Output is correct
26 Correct 11 ms 23900 KB Output is correct
27 Correct 11 ms 23900 KB Output is correct
28 Correct 10 ms 23928 KB Output is correct
29 Correct 12 ms 23900 KB Output is correct
30 Correct 10 ms 23900 KB Output is correct
31 Correct 10 ms 23900 KB Output is correct
32 Correct 10 ms 23900 KB Output is correct
33 Correct 10 ms 23960 KB Output is correct
34 Correct 10 ms 23900 KB Output is correct
35 Correct 10 ms 24016 KB Output is correct
36 Correct 10 ms 23900 KB Output is correct
37 Correct 13 ms 23876 KB Output is correct
38 Correct 9 ms 23900 KB Output is correct
39 Correct 10 ms 24080 KB Output is correct
40 Correct 10 ms 23932 KB Output is correct
41 Correct 11 ms 23900 KB Output is correct
42 Correct 10 ms 23900 KB Output is correct
43 Correct 9 ms 23796 KB Output is correct
44 Correct 10 ms 23816 KB Output is correct
45 Correct 12 ms 23900 KB Output is correct
46 Correct 10 ms 23900 KB Output is correct
47 Correct 10 ms 23800 KB Output is correct
48 Correct 10 ms 23900 KB Output is correct
49 Correct 9 ms 23900 KB Output is correct
50 Correct 9 ms 23852 KB Output is correct
51 Correct 10 ms 23900 KB Output is correct
52 Correct 9 ms 23900 KB Output is correct
53 Correct 10 ms 23780 KB Output is correct
54 Correct 10 ms 23900 KB Output is correct
55 Correct 10 ms 23900 KB Output is correct
56 Correct 9 ms 23900 KB Output is correct
57 Correct 9 ms 23736 KB Output is correct
58 Correct 9 ms 23900 KB Output is correct
59 Correct 9 ms 23900 KB Output is correct
60 Correct 12 ms 23900 KB Output is correct
61 Correct 10 ms 24156 KB Output is correct
62 Correct 10 ms 23900 KB Output is correct
63 Correct 10 ms 23900 KB Output is correct
64 Correct 13 ms 23928 KB Output is correct
65 Correct 12 ms 23864 KB Output is correct
66 Correct 10 ms 23900 KB Output is correct
67 Correct 9 ms 23900 KB Output is correct
68 Correct 11 ms 23900 KB Output is correct
69 Correct 10 ms 23900 KB Output is correct
70 Correct 10 ms 23900 KB Output is correct
71 Correct 10 ms 23900 KB Output is correct
72 Correct 9 ms 23944 KB Output is correct
73 Correct 9 ms 23900 KB Output is correct
74 Correct 10 ms 23900 KB Output is correct
75 Correct 10 ms 23900 KB Output is correct
76 Correct 10 ms 24156 KB Output is correct
77 Correct 13 ms 23900 KB Output is correct
78 Correct 10 ms 23900 KB Output is correct
79 Correct 11 ms 23900 KB Output is correct
80 Correct 9 ms 23996 KB Output is correct
81 Correct 9 ms 23900 KB Output is correct
82 Correct 10 ms 23792 KB Output is correct
83 Correct 9 ms 23900 KB Output is correct
84 Correct 10 ms 24004 KB Output is correct
85 Correct 10 ms 23900 KB Output is correct
86 Correct 10 ms 23884 KB Output is correct
87 Correct 10 ms 24012 KB Output is correct
88 Correct 10 ms 23944 KB Output is correct
89 Correct 9 ms 23900 KB Output is correct
90 Correct 9 ms 23988 KB Output is correct
91 Correct 9 ms 23900 KB Output is correct
92 Correct 10 ms 23952 KB Output is correct
93 Correct 10 ms 23960 KB Output is correct
94 Correct 11 ms 23900 KB Output is correct
95 Correct 10 ms 23900 KB Output is correct
96 Correct 10 ms 23900 KB Output is correct
97 Correct 11 ms 23888 KB Output is correct
98 Correct 10 ms 23848 KB Output is correct
99 Correct 12 ms 23900 KB Output is correct

Subtask #4
25.0 / 25.0

# 결과 실행 시간 메모리 Grader output
1 Correct 9 ms 23968 KB Output is correct
2 Correct 10 ms 23900 KB Output is correct
3 Correct 10 ms 23940 KB Output is correct
4 Correct 9 ms 23900 KB Output is correct
5 Correct 10 ms 23816 KB Output is correct
6 Correct 10 ms 23900 KB Output is correct
7 Correct 11 ms 23720 KB Output is correct
8 Correct 11 ms 23900 KB Output is correct
9 Correct 10 ms 23964 KB Output is correct
10 Correct 10 ms 23900 KB Output is correct
11 Correct 10 ms 23872 KB Output is correct
12 Correct 10 ms 23900 KB Output is correct
13 Correct 10 ms 23900 KB Output is correct
14 Correct 10 ms 23900 KB Output is correct
15 Correct 10 ms 23900 KB Output is correct
16 Correct 11 ms 23968 KB Output is correct
17 Correct 10 ms 23900 KB Output is correct
18 Correct 10 ms 23900 KB Output is correct
19 Correct 10 ms 23900 KB Output is correct
20 Correct 10 ms 23900 KB Output is correct
21 Correct 10 ms 23900 KB Output is correct
22 Correct 14 ms 23900 KB Output is correct
23 Correct 11 ms 23900 KB Output is correct
24 Correct 10 ms 23872 KB Output is correct
25 Correct 11 ms 23900 KB Output is correct
26 Correct 11 ms 23900 KB Output is correct
27 Correct 11 ms 23900 KB Output is correct
28 Correct 10 ms 23928 KB Output is correct
29 Correct 12 ms 23900 KB Output is correct
30 Correct 10 ms 23900 KB Output is correct
31 Correct 10 ms 23900 KB Output is correct
32 Correct 10 ms 23900 KB Output is correct
33 Correct 10 ms 23960 KB Output is correct
34 Correct 10 ms 23900 KB Output is correct
35 Correct 10 ms 24016 KB Output is correct
36 Correct 10 ms 23900 KB Output is correct
37 Correct 13 ms 23876 KB Output is correct
38 Correct 9 ms 23900 KB Output is correct
39 Correct 10 ms 24080 KB Output is correct
40 Correct 10 ms 23932 KB Output is correct
41 Correct 11 ms 23900 KB Output is correct
42 Correct 10 ms 23900 KB Output is correct
43 Correct 9 ms 23796 KB Output is correct
44 Correct 10 ms 23816 KB Output is correct
45 Correct 12 ms 23900 KB Output is correct
46 Correct 10 ms 23900 KB Output is correct
47 Correct 10 ms 23800 KB Output is correct
48 Correct 13 ms 24156 KB Output is correct
49 Correct 10 ms 23900 KB Output is correct
50 Correct 10 ms 23844 KB Output is correct
51 Correct 10 ms 23900 KB Output is correct
52 Correct 10 ms 23900 KB Output is correct
53 Correct 11 ms 23964 KB Output is correct
54 Correct 11 ms 23900 KB Output is correct
55 Correct 10 ms 23796 KB Output is correct
56 Correct 10 ms 23900 KB Output is correct
57 Correct 11 ms 23940 KB Output is correct
58 Correct 10 ms 23900 KB Output is correct
59 Correct 11 ms 23900 KB Output is correct
60 Correct 9 ms 23904 KB Output is correct
61 Correct 10 ms 23900 KB Output is correct
62 Correct 10 ms 23900 KB Output is correct
63 Correct 10 ms 23900 KB Output is correct
64 Correct 9 ms 23900 KB Output is correct
65 Correct 10 ms 23968 KB Output is correct
66 Correct 10 ms 23900 KB Output is correct
67 Correct 10 ms 23948 KB Output is correct
68 Correct 23 ms 31068 KB Output is correct
69 Correct 39 ms 38492 KB Output is correct
70 Correct 13 ms 23900 KB Output is correct
71 Correct 53 ms 45908 KB Output is correct
72 Correct 67 ms 53076 KB Output is correct
73 Correct 87 ms 60376 KB Output is correct
74 Correct 95 ms 67856 KB Output is correct
75 Correct 119 ms 75348 KB Output is correct
76 Correct 126 ms 82516 KB Output is correct
77 Correct 140 ms 89940 KB Output is correct
78 Correct 146 ms 97616 KB Output is correct
79 Correct 158 ms 104784 KB Output is correct
80 Correct 173 ms 111956 KB Output is correct
81 Correct 9 ms 23900 KB Output is correct
82 Correct 202 ms 119380 KB Output is correct
83 Correct 216 ms 126800 KB Output is correct
84 Correct 221 ms 134160 KB Output is correct
85 Correct 281 ms 141456 KB Output is correct
86 Correct 257 ms 148888 KB Output is correct
87 Correct 291 ms 156024 KB Output is correct
88 Correct 275 ms 163408 KB Output is correct
89 Correct 312 ms 170836 KB Output is correct
90 Correct 9 ms 23900 KB Output is correct
91 Correct 9 ms 23940 KB Output is correct
92 Correct 10 ms 23900 KB Output is correct
93 Correct 10 ms 23788 KB Output is correct
94 Correct 9 ms 23900 KB Output is correct
95 Correct 10 ms 23900 KB Output is correct
96 Correct 9 ms 23900 KB Output is correct
97 Correct 9 ms 23852 KB Output is correct
98 Correct 10 ms 23900 KB Output is correct
99 Correct 9 ms 23900 KB Output is correct
100 Correct 10 ms 23780 KB Output is correct
101 Correct 10 ms 23900 KB Output is correct
102 Correct 10 ms 23900 KB Output is correct
103 Correct 9 ms 23900 KB Output is correct
104 Correct 9 ms 23736 KB Output is correct
105 Correct 9 ms 23900 KB Output is correct
106 Correct 9 ms 23900 KB Output is correct
107 Correct 12 ms 23900 KB Output is correct
108 Correct 10 ms 24156 KB Output is correct
109 Correct 10 ms 23900 KB Output is correct
110 Correct 10 ms 23900 KB Output is correct
111 Correct 13 ms 23928 KB Output is correct
112 Correct 12 ms 23864 KB Output is correct
113 Correct 10 ms 23900 KB Output is correct
114 Correct 9 ms 23900 KB Output is correct
115 Correct 11 ms 23900 KB Output is correct
116 Correct 10 ms 23900 KB Output is correct
117 Correct 10 ms 23900 KB Output is correct
118 Correct 10 ms 23900 KB Output is correct
119 Correct 9 ms 23944 KB Output is correct
120 Correct 9 ms 23900 KB Output is correct
121 Correct 10 ms 23900 KB Output is correct
122 Correct 10 ms 23900 KB Output is correct
123 Correct 10 ms 24156 KB Output is correct
124 Correct 13 ms 23900 KB Output is correct
125 Correct 10 ms 23900 KB Output is correct
126 Correct 11 ms 23900 KB Output is correct
127 Correct 9 ms 23996 KB Output is correct
128 Correct 9 ms 23900 KB Output is correct
129 Correct 10 ms 23792 KB Output is correct
130 Correct 9 ms 23900 KB Output is correct
131 Correct 10 ms 24004 KB Output is correct
132 Correct 10 ms 23900 KB Output is correct
133 Correct 10 ms 23884 KB Output is correct
134 Correct 10 ms 24012 KB Output is correct
135 Correct 10 ms 23944 KB Output is correct
136 Correct 9 ms 23900 KB Output is correct
137 Correct 9 ms 23988 KB Output is correct
138 Correct 9 ms 23900 KB Output is correct
139 Correct 10 ms 23952 KB Output is correct
140 Correct 10 ms 23960 KB Output is correct
141 Correct 11 ms 23900 KB Output is correct
142 Correct 10 ms 23900 KB Output is correct
143 Correct 10 ms 23900 KB Output is correct
144 Correct 11 ms 23888 KB Output is correct
145 Correct 10 ms 23848 KB Output is correct
146 Correct 12 ms 23900 KB Output is correct
147 Correct 12 ms 23900 KB Output is correct
148 Correct 10 ms 23900 KB Output is correct
149 Correct 11 ms 23900 KB Output is correct
150 Correct 10 ms 23900 KB Output is correct
151 Correct 9 ms 23900 KB Output is correct
152 Correct 10 ms 23900 KB Output is correct
153 Correct 10 ms 23900 KB Output is correct
154 Correct 10 ms 23968 KB Output is correct
155 Correct 10 ms 23936 KB Output is correct
156 Correct 11 ms 23768 KB Output is correct
157 Correct 10 ms 23864 KB Output is correct
158 Correct 9 ms 23900 KB Output is correct
159 Correct 9 ms 23900 KB Output is correct
160 Correct 9 ms 23788 KB Output is correct
161 Correct 10 ms 23900 KB Output is correct
162 Correct 10 ms 23900 KB Output is correct
163 Correct 10 ms 23968 KB Output is correct
164 Correct 10 ms 23900 KB Output is correct
165 Correct 10 ms 23724 KB Output is correct
166 Correct 10 ms 23900 KB Output is correct
167 Correct 10 ms 23812 KB Output is correct
168 Correct 10 ms 23900 KB Output is correct
169 Correct 10 ms 23900 KB Output is correct
170 Correct 10 ms 23900 KB Output is correct
171 Correct 26 ms 27228 KB Output is correct
172 Correct 53 ms 30548 KB Output is correct
173 Correct 62 ms 34036 KB Output is correct
174 Correct 86 ms 37716 KB Output is correct
175 Correct 100 ms 41044 KB Output is correct
176 Correct 128 ms 44628 KB Output is correct
177 Correct 155 ms 48048 KB Output is correct
178 Correct 168 ms 51392 KB Output is correct
179 Correct 205 ms 55124 KB Output is correct
180 Correct 10 ms 23900 KB Output is correct
181 Correct 236 ms 58488 KB Output is correct
182 Correct 267 ms 61832 KB Output is correct
183 Correct 341 ms 65620 KB Output is correct
184 Correct 321 ms 68948 KB Output is correct
185 Correct 402 ms 72312 KB Output is correct
186 Correct 410 ms 75760 KB Output is correct
187 Correct 449 ms 79196 KB Output is correct
188 Correct 527 ms 83024 KB Output is correct
189 Correct 532 ms 86108 KB Output is correct
190 Correct 558 ms 89428 KB Output is correct
191 Correct 12 ms 23900 KB Output is correct
192 Correct 635 ms 93012 KB Output is correct
193 Correct 138 ms 96084 KB Output is correct
194 Correct 253 ms 168276 KB Output is correct
195 Correct 9 ms 23900 KB Output is correct
196 Correct 10 ms 23900 KB Output is correct
197 Correct 9 ms 23900 KB Output is correct
198 Correct 10 ms 23900 KB Output is correct