Submission #866703

# Submission time Handle Problem Language Result Execution time Memory
866703 2023-10-26T19:01:53 Z Bula Traffic (IOI10_traffic) C++17
100 / 100
903 ms 163084 KB
#include "traffic.h"
#include <bits/stdc++.h>
using namespace std;

const int N = 1e6 + 5;
vector<long long> subtree(N), c(N);
vector<int> v[N];
long long ans = LLONG_MAX, sum = 0;
int pas;

void dfs1(int u, int par){
    subtree[u] = c[u];
    for(auto x : v[u]){
        if(x == par) continue;
        dfs1(x, u);
        subtree[u] += subtree[x];
    }
}


void dfs2(int u, int par){
    long long mx = 0;
    mx = max(mx, sum - subtree[u]);
    for(auto x : v[u]){
        if(x != par){
            mx = max(mx, subtree[x]);
            dfs2(x, u);
        }
    }
    if(mx < ans){
        ans = mx;
        pas = u;
    }
}

int LocateCentre(int n, int p[], int s[], int d[]){
    for(int i = 0; i < n; i++){
        c[i] = p[i];
        sum += p[i];
        if(i == n - 1) continue;
        v[s[i]].push_back(d[i]);
        v[d[i]].push_back(s[i]);
    }
    dfs1(0, -1);
    dfs2(0, -1);
    return pas;
}
# Verdict Execution time Memory Grader output
1 Correct 10 ms 44892 KB Output is correct
2 Correct 10 ms 44892 KB Output is correct
3 Correct 9 ms 45032 KB Output is correct
4 Correct 8 ms 44888 KB Output is correct
5 Correct 8 ms 44888 KB Output is correct
6 Correct 8 ms 44892 KB Output is correct
7 Correct 9 ms 44892 KB Output is correct
8 Correct 8 ms 44892 KB Output is correct
9 Correct 8 ms 44972 KB Output is correct
10 Correct 8 ms 44892 KB Output is correct
11 Correct 8 ms 45028 KB Output is correct
12 Correct 9 ms 45008 KB Output is correct
13 Correct 8 ms 45012 KB Output is correct
14 Correct 8 ms 44892 KB Output is correct
15 Correct 9 ms 44888 KB Output is correct
16 Correct 8 ms 44892 KB Output is correct
17 Correct 9 ms 45020 KB Output is correct
18 Correct 8 ms 45020 KB Output is correct
19 Correct 9 ms 44836 KB Output is correct
20 Correct 9 ms 44960 KB Output is correct
21 Correct 8 ms 44924 KB Output is correct
22 Correct 8 ms 44888 KB Output is correct
23 Correct 8 ms 44892 KB Output is correct
24 Correct 8 ms 45032 KB Output is correct
25 Correct 8 ms 44892 KB Output is correct
26 Correct 9 ms 45144 KB Output is correct
27 Correct 11 ms 44888 KB Output is correct
28 Correct 10 ms 44888 KB Output is correct
29 Correct 8 ms 44892 KB Output is correct
30 Correct 9 ms 44892 KB Output is correct
31 Correct 9 ms 44892 KB Output is correct
32 Correct 8 ms 44892 KB Output is correct
33 Correct 9 ms 44892 KB Output is correct
34 Correct 8 ms 44892 KB Output is correct
35 Correct 9 ms 44888 KB Output is correct
36 Correct 9 ms 44892 KB Output is correct
37 Correct 9 ms 44892 KB Output is correct
38 Correct 9 ms 44980 KB Output is correct
39 Correct 9 ms 44992 KB Output is correct
40 Correct 9 ms 44892 KB Output is correct
41 Correct 9 ms 44896 KB Output is correct
42 Correct 9 ms 44888 KB Output is correct
43 Correct 8 ms 42840 KB Output is correct
44 Correct 8 ms 44892 KB Output is correct
45 Correct 8 ms 44888 KB Output is correct
46 Correct 9 ms 44892 KB Output is correct
47 Correct 9 ms 44892 KB Output is correct
# Verdict Execution time Memory Grader output
1 Correct 10 ms 44892 KB Output is correct
2 Correct 10 ms 44892 KB Output is correct
3 Correct 9 ms 45032 KB Output is correct
4 Correct 8 ms 44888 KB Output is correct
5 Correct 8 ms 44888 KB Output is correct
6 Correct 8 ms 44892 KB Output is correct
7 Correct 9 ms 44892 KB Output is correct
8 Correct 8 ms 44892 KB Output is correct
9 Correct 8 ms 44972 KB Output is correct
10 Correct 8 ms 44892 KB Output is correct
11 Correct 8 ms 45028 KB Output is correct
12 Correct 9 ms 45008 KB Output is correct
13 Correct 8 ms 45012 KB Output is correct
14 Correct 8 ms 44892 KB Output is correct
15 Correct 9 ms 44888 KB Output is correct
16 Correct 8 ms 44892 KB Output is correct
17 Correct 9 ms 45020 KB Output is correct
18 Correct 8 ms 45020 KB Output is correct
19 Correct 9 ms 44836 KB Output is correct
20 Correct 9 ms 44960 KB Output is correct
21 Correct 8 ms 44924 KB Output is correct
22 Correct 8 ms 44888 KB Output is correct
23 Correct 8 ms 44892 KB Output is correct
24 Correct 8 ms 45032 KB Output is correct
25 Correct 8 ms 44892 KB Output is correct
26 Correct 9 ms 45144 KB Output is correct
27 Correct 11 ms 44888 KB Output is correct
28 Correct 10 ms 44888 KB Output is correct
29 Correct 8 ms 44892 KB Output is correct
30 Correct 9 ms 44892 KB Output is correct
31 Correct 9 ms 44892 KB Output is correct
32 Correct 8 ms 44892 KB Output is correct
33 Correct 9 ms 44892 KB Output is correct
34 Correct 8 ms 44892 KB Output is correct
35 Correct 9 ms 44888 KB Output is correct
36 Correct 9 ms 44892 KB Output is correct
37 Correct 9 ms 44892 KB Output is correct
38 Correct 9 ms 44980 KB Output is correct
39 Correct 9 ms 44992 KB Output is correct
40 Correct 9 ms 44892 KB Output is correct
41 Correct 9 ms 44896 KB Output is correct
42 Correct 9 ms 44888 KB Output is correct
43 Correct 8 ms 42840 KB Output is correct
44 Correct 8 ms 44892 KB Output is correct
45 Correct 8 ms 44888 KB Output is correct
46 Correct 9 ms 44892 KB Output is correct
47 Correct 9 ms 44892 KB Output is correct
48 Correct 9 ms 44892 KB Output is correct
49 Correct 8 ms 44980 KB Output is correct
50 Correct 8 ms 44892 KB Output is correct
51 Correct 9 ms 44892 KB Output is correct
52 Correct 9 ms 44892 KB Output is correct
53 Correct 8 ms 45000 KB Output is correct
54 Correct 9 ms 45016 KB Output is correct
55 Correct 10 ms 44856 KB Output is correct
56 Correct 9 ms 44892 KB Output is correct
57 Correct 9 ms 44892 KB Output is correct
58 Correct 8 ms 44836 KB Output is correct
59 Correct 8 ms 44892 KB Output is correct
60 Correct 8 ms 44892 KB Output is correct
61 Correct 8 ms 44892 KB Output is correct
62 Correct 9 ms 45028 KB Output is correct
63 Correct 9 ms 45008 KB Output is correct
64 Correct 8 ms 45144 KB Output is correct
65 Correct 9 ms 44892 KB Output is correct
66 Correct 8 ms 44892 KB Output is correct
67 Correct 8 ms 44892 KB Output is correct
68 Correct 26 ms 50372 KB Output is correct
69 Correct 49 ms 55888 KB Output is correct
70 Correct 9 ms 44888 KB Output is correct
71 Correct 57 ms 61524 KB Output is correct
72 Correct 77 ms 67012 KB Output is correct
73 Correct 88 ms 72672 KB Output is correct
74 Correct 104 ms 78276 KB Output is correct
75 Correct 135 ms 86076 KB Output is correct
76 Correct 143 ms 93744 KB Output is correct
77 Correct 161 ms 101224 KB Output is correct
78 Correct 197 ms 107096 KB Output is correct
79 Correct 225 ms 112456 KB Output is correct
80 Correct 206 ms 118104 KB Output is correct
81 Correct 8 ms 44888 KB Output is correct
82 Correct 237 ms 123728 KB Output is correct
83 Correct 246 ms 129240 KB Output is correct
84 Correct 262 ms 134996 KB Output is correct
85 Correct 280 ms 140372 KB Output is correct
86 Correct 299 ms 146012 KB Output is correct
87 Correct 322 ms 151620 KB Output is correct
88 Correct 340 ms 157268 KB Output is correct
89 Correct 347 ms 163084 KB Output is correct
90 Correct 9 ms 42840 KB Output is correct
91 Correct 9 ms 44888 KB Output is correct
92 Correct 8 ms 44892 KB Output is correct
93 Correct 9 ms 44892 KB Output is correct
94 Correct 8 ms 44892 KB Output is correct
# Verdict Execution time Memory Grader output
1 Correct 10 ms 44892 KB Output is correct
2 Correct 10 ms 44892 KB Output is correct
3 Correct 9 ms 45032 KB Output is correct
4 Correct 8 ms 44888 KB Output is correct
5 Correct 8 ms 44888 KB Output is correct
6 Correct 8 ms 44892 KB Output is correct
7 Correct 9 ms 44892 KB Output is correct
8 Correct 8 ms 44892 KB Output is correct
9 Correct 8 ms 44972 KB Output is correct
10 Correct 8 ms 44892 KB Output is correct
11 Correct 8 ms 45028 KB Output is correct
12 Correct 9 ms 45008 KB Output is correct
13 Correct 8 ms 45012 KB Output is correct
14 Correct 8 ms 44892 KB Output is correct
15 Correct 9 ms 44888 KB Output is correct
16 Correct 8 ms 44892 KB Output is correct
17 Correct 9 ms 45020 KB Output is correct
18 Correct 8 ms 45020 KB Output is correct
19 Correct 9 ms 44836 KB Output is correct
20 Correct 9 ms 44960 KB Output is correct
21 Correct 8 ms 44924 KB Output is correct
22 Correct 8 ms 44888 KB Output is correct
23 Correct 8 ms 44892 KB Output is correct
24 Correct 8 ms 45032 KB Output is correct
25 Correct 8 ms 44892 KB Output is correct
26 Correct 9 ms 45144 KB Output is correct
27 Correct 11 ms 44888 KB Output is correct
28 Correct 10 ms 44888 KB Output is correct
29 Correct 8 ms 44892 KB Output is correct
30 Correct 9 ms 44892 KB Output is correct
31 Correct 9 ms 44892 KB Output is correct
32 Correct 8 ms 44892 KB Output is correct
33 Correct 9 ms 44892 KB Output is correct
34 Correct 8 ms 44892 KB Output is correct
35 Correct 9 ms 44888 KB Output is correct
36 Correct 9 ms 44892 KB Output is correct
37 Correct 9 ms 44892 KB Output is correct
38 Correct 9 ms 44980 KB Output is correct
39 Correct 9 ms 44992 KB Output is correct
40 Correct 9 ms 44892 KB Output is correct
41 Correct 9 ms 44896 KB Output is correct
42 Correct 9 ms 44888 KB Output is correct
43 Correct 8 ms 42840 KB Output is correct
44 Correct 8 ms 44892 KB Output is correct
45 Correct 8 ms 44888 KB Output is correct
46 Correct 9 ms 44892 KB Output is correct
47 Correct 9 ms 44892 KB Output is correct
48 Correct 9 ms 44880 KB Output is correct
49 Correct 8 ms 44892 KB Output is correct
50 Correct 9 ms 44888 KB Output is correct
51 Correct 9 ms 44892 KB Output is correct
52 Correct 9 ms 45024 KB Output is correct
53 Correct 9 ms 44892 KB Output is correct
54 Correct 9 ms 44888 KB Output is correct
55 Correct 9 ms 45008 KB Output is correct
56 Correct 8 ms 44892 KB Output is correct
57 Correct 8 ms 45020 KB Output is correct
58 Correct 9 ms 44892 KB Output is correct
59 Correct 9 ms 44960 KB Output is correct
60 Correct 8 ms 44888 KB Output is correct
61 Correct 8 ms 44892 KB Output is correct
62 Correct 9 ms 44892 KB Output is correct
63 Correct 8 ms 44892 KB Output is correct
64 Correct 8 ms 44888 KB Output is correct
65 Correct 9 ms 44892 KB Output is correct
66 Correct 9 ms 44892 KB Output is correct
67 Correct 8 ms 44892 KB Output is correct
68 Correct 9 ms 44892 KB Output is correct
69 Correct 8 ms 44892 KB Output is correct
70 Correct 9 ms 45012 KB Output is correct
71 Correct 8 ms 44888 KB Output is correct
72 Correct 8 ms 44892 KB Output is correct
73 Correct 9 ms 45004 KB Output is correct
74 Correct 8 ms 44892 KB Output is correct
75 Correct 9 ms 44892 KB Output is correct
76 Correct 10 ms 44892 KB Output is correct
77 Correct 10 ms 45036 KB Output is correct
78 Correct 10 ms 44892 KB Output is correct
79 Correct 10 ms 44892 KB Output is correct
80 Correct 11 ms 44892 KB Output is correct
81 Correct 9 ms 42844 KB Output is correct
82 Correct 9 ms 44892 KB Output is correct
83 Correct 9 ms 44892 KB Output is correct
84 Correct 9 ms 44976 KB Output is correct
85 Correct 9 ms 44892 KB Output is correct
86 Correct 9 ms 44892 KB Output is correct
87 Correct 9 ms 44892 KB Output is correct
88 Correct 9 ms 44892 KB Output is correct
89 Correct 9 ms 44892 KB Output is correct
90 Correct 10 ms 45284 KB Output is correct
91 Correct 8 ms 44888 KB Output is correct
92 Correct 9 ms 44888 KB Output is correct
93 Correct 9 ms 44892 KB Output is correct
94 Correct 9 ms 44892 KB Output is correct
95 Correct 9 ms 44888 KB Output is correct
96 Correct 8 ms 44892 KB Output is correct
97 Correct 11 ms 45020 KB Output is correct
98 Correct 8 ms 44892 KB Output is correct
99 Correct 9 ms 44892 KB Output is correct
# Verdict Execution time Memory Grader output
1 Correct 10 ms 44892 KB Output is correct
2 Correct 10 ms 44892 KB Output is correct
3 Correct 9 ms 45032 KB Output is correct
4 Correct 8 ms 44888 KB Output is correct
5 Correct 8 ms 44888 KB Output is correct
6 Correct 8 ms 44892 KB Output is correct
7 Correct 9 ms 44892 KB Output is correct
8 Correct 8 ms 44892 KB Output is correct
9 Correct 8 ms 44972 KB Output is correct
10 Correct 8 ms 44892 KB Output is correct
11 Correct 8 ms 45028 KB Output is correct
12 Correct 9 ms 45008 KB Output is correct
13 Correct 8 ms 45012 KB Output is correct
14 Correct 8 ms 44892 KB Output is correct
15 Correct 9 ms 44888 KB Output is correct
16 Correct 8 ms 44892 KB Output is correct
17 Correct 9 ms 45020 KB Output is correct
18 Correct 8 ms 45020 KB Output is correct
19 Correct 9 ms 44836 KB Output is correct
20 Correct 9 ms 44960 KB Output is correct
21 Correct 8 ms 44924 KB Output is correct
22 Correct 8 ms 44888 KB Output is correct
23 Correct 8 ms 44892 KB Output is correct
24 Correct 8 ms 45032 KB Output is correct
25 Correct 8 ms 44892 KB Output is correct
26 Correct 9 ms 45144 KB Output is correct
27 Correct 11 ms 44888 KB Output is correct
28 Correct 10 ms 44888 KB Output is correct
29 Correct 8 ms 44892 KB Output is correct
30 Correct 9 ms 44892 KB Output is correct
31 Correct 9 ms 44892 KB Output is correct
32 Correct 8 ms 44892 KB Output is correct
33 Correct 9 ms 44892 KB Output is correct
34 Correct 8 ms 44892 KB Output is correct
35 Correct 9 ms 44888 KB Output is correct
36 Correct 9 ms 44892 KB Output is correct
37 Correct 9 ms 44892 KB Output is correct
38 Correct 9 ms 44980 KB Output is correct
39 Correct 9 ms 44992 KB Output is correct
40 Correct 9 ms 44892 KB Output is correct
41 Correct 9 ms 44896 KB Output is correct
42 Correct 9 ms 44888 KB Output is correct
43 Correct 8 ms 42840 KB Output is correct
44 Correct 8 ms 44892 KB Output is correct
45 Correct 8 ms 44888 KB Output is correct
46 Correct 9 ms 44892 KB Output is correct
47 Correct 9 ms 44892 KB Output is correct
48 Correct 9 ms 44892 KB Output is correct
49 Correct 8 ms 44980 KB Output is correct
50 Correct 8 ms 44892 KB Output is correct
51 Correct 9 ms 44892 KB Output is correct
52 Correct 9 ms 44892 KB Output is correct
53 Correct 8 ms 45000 KB Output is correct
54 Correct 9 ms 45016 KB Output is correct
55 Correct 10 ms 44856 KB Output is correct
56 Correct 9 ms 44892 KB Output is correct
57 Correct 9 ms 44892 KB Output is correct
58 Correct 8 ms 44836 KB Output is correct
59 Correct 8 ms 44892 KB Output is correct
60 Correct 8 ms 44892 KB Output is correct
61 Correct 8 ms 44892 KB Output is correct
62 Correct 9 ms 45028 KB Output is correct
63 Correct 9 ms 45008 KB Output is correct
64 Correct 8 ms 45144 KB Output is correct
65 Correct 9 ms 44892 KB Output is correct
66 Correct 8 ms 44892 KB Output is correct
67 Correct 8 ms 44892 KB Output is correct
68 Correct 26 ms 50372 KB Output is correct
69 Correct 49 ms 55888 KB Output is correct
70 Correct 9 ms 44888 KB Output is correct
71 Correct 57 ms 61524 KB Output is correct
72 Correct 77 ms 67012 KB Output is correct
73 Correct 88 ms 72672 KB Output is correct
74 Correct 104 ms 78276 KB Output is correct
75 Correct 135 ms 86076 KB Output is correct
76 Correct 143 ms 93744 KB Output is correct
77 Correct 161 ms 101224 KB Output is correct
78 Correct 197 ms 107096 KB Output is correct
79 Correct 225 ms 112456 KB Output is correct
80 Correct 206 ms 118104 KB Output is correct
81 Correct 8 ms 44888 KB Output is correct
82 Correct 237 ms 123728 KB Output is correct
83 Correct 246 ms 129240 KB Output is correct
84 Correct 262 ms 134996 KB Output is correct
85 Correct 280 ms 140372 KB Output is correct
86 Correct 299 ms 146012 KB Output is correct
87 Correct 322 ms 151620 KB Output is correct
88 Correct 340 ms 157268 KB Output is correct
89 Correct 347 ms 163084 KB Output is correct
90 Correct 9 ms 42840 KB Output is correct
91 Correct 9 ms 44888 KB Output is correct
92 Correct 8 ms 44892 KB Output is correct
93 Correct 9 ms 44892 KB Output is correct
94 Correct 8 ms 44892 KB Output is correct
95 Correct 9 ms 44880 KB Output is correct
96 Correct 8 ms 44892 KB Output is correct
97 Correct 9 ms 44888 KB Output is correct
98 Correct 9 ms 44892 KB Output is correct
99 Correct 9 ms 45024 KB Output is correct
100 Correct 9 ms 44892 KB Output is correct
101 Correct 9 ms 44888 KB Output is correct
102 Correct 9 ms 45008 KB Output is correct
103 Correct 8 ms 44892 KB Output is correct
104 Correct 8 ms 45020 KB Output is correct
105 Correct 9 ms 44892 KB Output is correct
106 Correct 9 ms 44960 KB Output is correct
107 Correct 8 ms 44888 KB Output is correct
108 Correct 8 ms 44892 KB Output is correct
109 Correct 9 ms 44892 KB Output is correct
110 Correct 8 ms 44892 KB Output is correct
111 Correct 8 ms 44888 KB Output is correct
112 Correct 9 ms 44892 KB Output is correct
113 Correct 9 ms 44892 KB Output is correct
114 Correct 8 ms 44892 KB Output is correct
115 Correct 9 ms 44892 KB Output is correct
116 Correct 8 ms 44892 KB Output is correct
117 Correct 9 ms 45012 KB Output is correct
118 Correct 8 ms 44888 KB Output is correct
119 Correct 8 ms 44892 KB Output is correct
120 Correct 9 ms 45004 KB Output is correct
121 Correct 8 ms 44892 KB Output is correct
122 Correct 9 ms 44892 KB Output is correct
123 Correct 10 ms 44892 KB Output is correct
124 Correct 10 ms 45036 KB Output is correct
125 Correct 10 ms 44892 KB Output is correct
126 Correct 10 ms 44892 KB Output is correct
127 Correct 11 ms 44892 KB Output is correct
128 Correct 9 ms 42844 KB Output is correct
129 Correct 9 ms 44892 KB Output is correct
130 Correct 9 ms 44892 KB Output is correct
131 Correct 9 ms 44976 KB Output is correct
132 Correct 9 ms 44892 KB Output is correct
133 Correct 9 ms 44892 KB Output is correct
134 Correct 9 ms 44892 KB Output is correct
135 Correct 9 ms 44892 KB Output is correct
136 Correct 9 ms 44892 KB Output is correct
137 Correct 10 ms 45284 KB Output is correct
138 Correct 8 ms 44888 KB Output is correct
139 Correct 9 ms 44888 KB Output is correct
140 Correct 9 ms 44892 KB Output is correct
141 Correct 9 ms 44892 KB Output is correct
142 Correct 9 ms 44888 KB Output is correct
143 Correct 8 ms 44892 KB Output is correct
144 Correct 11 ms 45020 KB Output is correct
145 Correct 8 ms 44892 KB Output is correct
146 Correct 9 ms 44892 KB Output is correct
147 Correct 9 ms 44892 KB Output is correct
148 Correct 10 ms 44892 KB Output is correct
149 Correct 9 ms 45028 KB Output is correct
150 Correct 8 ms 44888 KB Output is correct
151 Correct 8 ms 44888 KB Output is correct
152 Correct 8 ms 44892 KB Output is correct
153 Correct 9 ms 44892 KB Output is correct
154 Correct 9 ms 44892 KB Output is correct
155 Correct 8 ms 44888 KB Output is correct
156 Correct 9 ms 45028 KB Output is correct
157 Correct 10 ms 44964 KB Output is correct
158 Correct 8 ms 44892 KB Output is correct
159 Correct 9 ms 44892 KB Output is correct
160 Correct 9 ms 44888 KB Output is correct
161 Correct 8 ms 45012 KB Output is correct
162 Correct 9 ms 44984 KB Output is correct
163 Correct 8 ms 45012 KB Output is correct
164 Correct 8 ms 45024 KB Output is correct
165 Correct 9 ms 45032 KB Output is correct
166 Correct 8 ms 44892 KB Output is correct
167 Correct 9 ms 44984 KB Output is correct
168 Correct 9 ms 44888 KB Output is correct
169 Correct 9 ms 45144 KB Output is correct
170 Correct 9 ms 45000 KB Output is correct
171 Correct 29 ms 47304 KB Output is correct
172 Correct 50 ms 49752 KB Output is correct
173 Correct 101 ms 52304 KB Output is correct
174 Correct 97 ms 54876 KB Output is correct
175 Correct 133 ms 57152 KB Output is correct
176 Correct 199 ms 59860 KB Output is correct
177 Correct 263 ms 64456 KB Output is correct
178 Correct 292 ms 68948 KB Output is correct
179 Correct 320 ms 73300 KB Output is correct
180 Correct 8 ms 42844 KB Output is correct
181 Correct 395 ms 75976 KB Output is correct
182 Correct 453 ms 78292 KB Output is correct
183 Correct 472 ms 81136 KB Output is correct
184 Correct 561 ms 83280 KB Output is correct
185 Correct 581 ms 85908 KB Output is correct
186 Correct 641 ms 88400 KB Output is correct
187 Correct 695 ms 91004 KB Output is correct
188 Correct 770 ms 93632 KB Output is correct
189 Correct 778 ms 95916 KB Output is correct
190 Correct 882 ms 98352 KB Output is correct
191 Correct 8 ms 44892 KB Output is correct
192 Correct 903 ms 100884 KB Output is correct
193 Correct 181 ms 105540 KB Output is correct
194 Correct 336 ms 160560 KB Output is correct
195 Correct 8 ms 44888 KB Output is correct
196 Correct 10 ms 44892 KB Output is correct
197 Correct 9 ms 44892 KB Output is correct
198 Correct 9 ms 44980 KB Output is correct