#include <iostream>
#include <stack>
using namespace std;
string s;
int cnt, n;
#define nmax 4000001
int lSon[nmax], rSon[nmax], parent[nmax], arb[nmax], minn[nmax], maxx[nmax], sizee[nmax];
// 0 - frunza, 1 - maxim, -1 - minim
int is_min( int i ) {
if( s[i] == 'm' && s[i + 1] == 'i' && s[i + 2] == 'n' )
return 1;
return 0;
}
int is_max( int i ) {
if( s[i] == 'm' && s[i + 1] == 'a' && s[i + 2] == 'x' )
return 1;
return 0;
}
void init( int l, int vf ) {
if( l >= n )
return;
//cout << l << " " << vf << "\n";
if( is_min( l ) ) {
arb[vf] = -1;
cnt++;
lSon[vf] = cnt;
parent[cnt] = vf;
init( l + 4, cnt );
} else if( is_max( l ) ) {
arb[vf] = 1;
cnt++;
lSon[vf] = cnt;
parent[cnt] = vf;
init( l + 4, cnt );
} else if( s[l] == ',' ) {
cnt++;
parent[cnt] = parent[vf];
rSon[parent[vf]] = cnt;
init( l + 1, cnt );
} else if( s[l] == ')' ) {
init( l + 1, parent[vf] );
} else {
init( l + 1, vf );
}
}
void dfs( int vf ) {
if( arb[vf] == 0 ) {
sizee[vf] = 1;
minn[vf] = maxx[vf] = 1;
//cout << vf << " " << arb[vf];
//cout << "\n";
return;
}
dfs( lSon[vf] );
dfs( rSon[vf] );
sizee[vf] = sizee[lSon[vf]] + sizee[rSon[vf]];
if( arb[vf] == -1 ) {
minn[vf] = min( minn[lSon[vf]], minn[rSon[vf]] );
maxx[vf] = maxx[lSon[vf]] + maxx[rSon[vf]] - 1;
} else {
minn[vf] = minn[lSon[vf]] + minn[rSon[vf]];
maxx[vf] = max( sizee[lSon[vf]] + maxx[rSon[vf]], sizee[rSon[vf]] + maxx[lSon[vf]] );
}
//cout << vf << " " << arb[vf] << " ";
//cout << maxx[vf] << " " << minn[vf] << " " << sizee[vf] << "\n";
}
int main() {
cin >> s;
n = s.size();
cnt = 1;
init( 0, 1 );
dfs( 1 );
cout << 1 - minn[1] + maxx[1];
return 0;
}
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
2 ms |
12632 KB |
Output is correct |
2 |
Correct |
1 ms |
12636 KB |
Output is correct |
3 |
Correct |
1 ms |
12660 KB |
Output is correct |
4 |
Correct |
1 ms |
12636 KB |
Output is correct |
5 |
Correct |
1 ms |
12636 KB |
Output is correct |
6 |
Correct |
1 ms |
12636 KB |
Output is correct |
7 |
Correct |
1 ms |
12636 KB |
Output is correct |
8 |
Correct |
1 ms |
12636 KB |
Output is correct |
9 |
Correct |
1 ms |
12636 KB |
Output is correct |
10 |
Correct |
1 ms |
12636 KB |
Output is correct |
11 |
Correct |
1 ms |
12636 KB |
Output is correct |
12 |
Correct |
1 ms |
12636 KB |
Output is correct |
13 |
Correct |
1 ms |
12636 KB |
Output is correct |
14 |
Correct |
1 ms |
12636 KB |
Output is correct |
15 |
Correct |
1 ms |
12636 KB |
Output is correct |
16 |
Correct |
1 ms |
12636 KB |
Output is correct |
17 |
Correct |
1 ms |
12636 KB |
Output is correct |
18 |
Correct |
1 ms |
12636 KB |
Output is correct |
19 |
Correct |
1 ms |
12636 KB |
Output is correct |
20 |
Correct |
1 ms |
12632 KB |
Output is correct |
21 |
Correct |
1 ms |
12636 KB |
Output is correct |
22 |
Correct |
1 ms |
12636 KB |
Output is correct |
23 |
Correct |
1 ms |
12636 KB |
Output is correct |
24 |
Correct |
1 ms |
12636 KB |
Output is correct |
25 |
Correct |
1 ms |
12636 KB |
Output is correct |
26 |
Correct |
1 ms |
12636 KB |
Output is correct |
27 |
Correct |
2 ms |
12636 KB |
Output is correct |
28 |
Correct |
1 ms |
12632 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
2 ms |
12632 KB |
Output is correct |
2 |
Correct |
1 ms |
12636 KB |
Output is correct |
3 |
Correct |
1 ms |
12660 KB |
Output is correct |
4 |
Correct |
1 ms |
12636 KB |
Output is correct |
5 |
Correct |
1 ms |
12636 KB |
Output is correct |
6 |
Correct |
1 ms |
12636 KB |
Output is correct |
7 |
Correct |
1 ms |
12636 KB |
Output is correct |
8 |
Correct |
1 ms |
12636 KB |
Output is correct |
9 |
Correct |
1 ms |
12636 KB |
Output is correct |
10 |
Correct |
1 ms |
12636 KB |
Output is correct |
11 |
Correct |
1 ms |
12636 KB |
Output is correct |
12 |
Correct |
1 ms |
12636 KB |
Output is correct |
13 |
Correct |
1 ms |
12636 KB |
Output is correct |
14 |
Correct |
1 ms |
12636 KB |
Output is correct |
15 |
Correct |
1 ms |
12636 KB |
Output is correct |
16 |
Correct |
1 ms |
12636 KB |
Output is correct |
17 |
Correct |
1 ms |
12636 KB |
Output is correct |
18 |
Correct |
1 ms |
12636 KB |
Output is correct |
19 |
Correct |
1 ms |
12636 KB |
Output is correct |
20 |
Correct |
1 ms |
12632 KB |
Output is correct |
21 |
Correct |
1 ms |
12636 KB |
Output is correct |
22 |
Correct |
1 ms |
12636 KB |
Output is correct |
23 |
Correct |
1 ms |
12636 KB |
Output is correct |
24 |
Correct |
1 ms |
12636 KB |
Output is correct |
25 |
Correct |
1 ms |
12636 KB |
Output is correct |
26 |
Correct |
1 ms |
12636 KB |
Output is correct |
27 |
Correct |
2 ms |
12636 KB |
Output is correct |
28 |
Correct |
1 ms |
12632 KB |
Output is correct |
29 |
Correct |
1 ms |
12632 KB |
Output is correct |
30 |
Correct |
1 ms |
12636 KB |
Output is correct |
31 |
Correct |
1 ms |
12636 KB |
Output is correct |
32 |
Correct |
1 ms |
12636 KB |
Output is correct |
33 |
Correct |
1 ms |
12636 KB |
Output is correct |
34 |
Correct |
1 ms |
12632 KB |
Output is correct |
35 |
Correct |
1 ms |
12632 KB |
Output is correct |
36 |
Correct |
1 ms |
12632 KB |
Output is correct |
37 |
Correct |
1 ms |
12636 KB |
Output is correct |
38 |
Correct |
1 ms |
12636 KB |
Output is correct |
39 |
Correct |
2 ms |
12632 KB |
Output is correct |
40 |
Correct |
1 ms |
12636 KB |
Output is correct |
41 |
Correct |
2 ms |
12636 KB |
Output is correct |
42 |
Correct |
2 ms |
12636 KB |
Output is correct |
43 |
Correct |
1 ms |
12636 KB |
Output is correct |
44 |
Correct |
1 ms |
12636 KB |
Output is correct |
45 |
Correct |
1 ms |
12636 KB |
Output is correct |
46 |
Correct |
1 ms |
12636 KB |
Output is correct |
47 |
Correct |
1 ms |
12636 KB |
Output is correct |
48 |
Correct |
1 ms |
12636 KB |
Output is correct |
49 |
Correct |
1 ms |
12740 KB |
Output is correct |
50 |
Correct |
1 ms |
12636 KB |
Output is correct |
51 |
Correct |
1 ms |
12636 KB |
Output is correct |
52 |
Correct |
1 ms |
12636 KB |
Output is correct |
53 |
Correct |
1 ms |
12636 KB |
Output is correct |
54 |
Correct |
1 ms |
12632 KB |
Output is correct |
55 |
Correct |
2 ms |
12636 KB |
Output is correct |
56 |
Correct |
1 ms |
12636 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
159 ms |
129556 KB |
Output is correct |
2 |
Correct |
157 ms |
136636 KB |
Output is correct |
3 |
Correct |
156 ms |
136624 KB |
Output is correct |
4 |
Correct |
159 ms |
136416 KB |
Output is correct |
5 |
Correct |
163 ms |
137320 KB |
Output is correct |
6 |
Correct |
156 ms |
136708 KB |
Output is correct |
7 |
Correct |
161 ms |
136372 KB |
Output is correct |
8 |
Correct |
158 ms |
136368 KB |
Output is correct |
9 |
Correct |
164 ms |
136456 KB |
Output is correct |
10 |
Correct |
154 ms |
136368 KB |
Output is correct |
11 |
Correct |
159 ms |
137140 KB |
Output is correct |
12 |
Correct |
162 ms |
136356 KB |
Output is correct |
13 |
Correct |
1 ms |
12632 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
2 ms |
12632 KB |
Output is correct |
2 |
Correct |
1 ms |
12636 KB |
Output is correct |
3 |
Correct |
1 ms |
12660 KB |
Output is correct |
4 |
Correct |
1 ms |
12636 KB |
Output is correct |
5 |
Correct |
1 ms |
12636 KB |
Output is correct |
6 |
Correct |
1 ms |
12636 KB |
Output is correct |
7 |
Correct |
1 ms |
12636 KB |
Output is correct |
8 |
Correct |
1 ms |
12636 KB |
Output is correct |
9 |
Correct |
1 ms |
12636 KB |
Output is correct |
10 |
Correct |
1 ms |
12636 KB |
Output is correct |
11 |
Correct |
1 ms |
12636 KB |
Output is correct |
12 |
Correct |
1 ms |
12636 KB |
Output is correct |
13 |
Correct |
1 ms |
12636 KB |
Output is correct |
14 |
Correct |
1 ms |
12636 KB |
Output is correct |
15 |
Correct |
1 ms |
12636 KB |
Output is correct |
16 |
Correct |
1 ms |
12636 KB |
Output is correct |
17 |
Correct |
1 ms |
12636 KB |
Output is correct |
18 |
Correct |
1 ms |
12636 KB |
Output is correct |
19 |
Correct |
1 ms |
12636 KB |
Output is correct |
20 |
Correct |
1 ms |
12632 KB |
Output is correct |
21 |
Correct |
1 ms |
12636 KB |
Output is correct |
22 |
Correct |
1 ms |
12636 KB |
Output is correct |
23 |
Correct |
1 ms |
12636 KB |
Output is correct |
24 |
Correct |
1 ms |
12636 KB |
Output is correct |
25 |
Correct |
1 ms |
12636 KB |
Output is correct |
26 |
Correct |
1 ms |
12636 KB |
Output is correct |
27 |
Correct |
2 ms |
12636 KB |
Output is correct |
28 |
Correct |
1 ms |
12632 KB |
Output is correct |
29 |
Correct |
1 ms |
12632 KB |
Output is correct |
30 |
Correct |
1 ms |
12636 KB |
Output is correct |
31 |
Correct |
1 ms |
12636 KB |
Output is correct |
32 |
Correct |
1 ms |
12636 KB |
Output is correct |
33 |
Correct |
1 ms |
12636 KB |
Output is correct |
34 |
Correct |
1 ms |
12632 KB |
Output is correct |
35 |
Correct |
1 ms |
12632 KB |
Output is correct |
36 |
Correct |
1 ms |
12632 KB |
Output is correct |
37 |
Correct |
1 ms |
12636 KB |
Output is correct |
38 |
Correct |
1 ms |
12636 KB |
Output is correct |
39 |
Correct |
2 ms |
12632 KB |
Output is correct |
40 |
Correct |
1 ms |
12636 KB |
Output is correct |
41 |
Correct |
2 ms |
12636 KB |
Output is correct |
42 |
Correct |
2 ms |
12636 KB |
Output is correct |
43 |
Correct |
1 ms |
12636 KB |
Output is correct |
44 |
Correct |
1 ms |
12636 KB |
Output is correct |
45 |
Correct |
1 ms |
12636 KB |
Output is correct |
46 |
Correct |
1 ms |
12636 KB |
Output is correct |
47 |
Correct |
1 ms |
12636 KB |
Output is correct |
48 |
Correct |
1 ms |
12636 KB |
Output is correct |
49 |
Correct |
1 ms |
12740 KB |
Output is correct |
50 |
Correct |
1 ms |
12636 KB |
Output is correct |
51 |
Correct |
1 ms |
12636 KB |
Output is correct |
52 |
Correct |
1 ms |
12636 KB |
Output is correct |
53 |
Correct |
1 ms |
12636 KB |
Output is correct |
54 |
Correct |
1 ms |
12632 KB |
Output is correct |
55 |
Correct |
2 ms |
12636 KB |
Output is correct |
56 |
Correct |
1 ms |
12636 KB |
Output is correct |
57 |
Correct |
1 ms |
12632 KB |
Output is correct |
58 |
Correct |
1 ms |
12636 KB |
Output is correct |
59 |
Correct |
1 ms |
12752 KB |
Output is correct |
60 |
Correct |
1 ms |
12636 KB |
Output is correct |
61 |
Correct |
1 ms |
12636 KB |
Output is correct |
62 |
Correct |
1 ms |
12636 KB |
Output is correct |
63 |
Correct |
1 ms |
12748 KB |
Output is correct |
64 |
Correct |
1 ms |
12636 KB |
Output is correct |
65 |
Correct |
1 ms |
12636 KB |
Output is correct |
66 |
Correct |
1 ms |
12636 KB |
Output is correct |
67 |
Correct |
1 ms |
12636 KB |
Output is correct |
68 |
Correct |
1 ms |
12636 KB |
Output is correct |
69 |
Correct |
1 ms |
12636 KB |
Output is correct |
70 |
Correct |
1 ms |
12636 KB |
Output is correct |
71 |
Correct |
1 ms |
12636 KB |
Output is correct |
72 |
Correct |
1 ms |
12636 KB |
Output is correct |
73 |
Correct |
1 ms |
12636 KB |
Output is correct |
74 |
Correct |
1 ms |
12636 KB |
Output is correct |
75 |
Correct |
1 ms |
12636 KB |
Output is correct |
76 |
Correct |
2 ms |
12636 KB |
Output is correct |
77 |
Correct |
1 ms |
12636 KB |
Output is correct |
78 |
Correct |
1 ms |
12636 KB |
Output is correct |
79 |
Correct |
1 ms |
12632 KB |
Output is correct |
80 |
Correct |
1 ms |
12636 KB |
Output is correct |
81 |
Correct |
1 ms |
12636 KB |
Output is correct |
82 |
Correct |
2 ms |
12636 KB |
Output is correct |
83 |
Correct |
1 ms |
12632 KB |
Output is correct |
84 |
Correct |
1 ms |
12888 KB |
Output is correct |
85 |
Correct |
1 ms |
12636 KB |
Output is correct |
86 |
Correct |
1 ms |
12636 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
2 ms |
12632 KB |
Output is correct |
2 |
Correct |
1 ms |
12636 KB |
Output is correct |
3 |
Correct |
1 ms |
12660 KB |
Output is correct |
4 |
Correct |
1 ms |
12636 KB |
Output is correct |
5 |
Correct |
1 ms |
12636 KB |
Output is correct |
6 |
Correct |
1 ms |
12636 KB |
Output is correct |
7 |
Correct |
1 ms |
12636 KB |
Output is correct |
8 |
Correct |
1 ms |
12636 KB |
Output is correct |
9 |
Correct |
1 ms |
12636 KB |
Output is correct |
10 |
Correct |
1 ms |
12636 KB |
Output is correct |
11 |
Correct |
1 ms |
12636 KB |
Output is correct |
12 |
Correct |
1 ms |
12636 KB |
Output is correct |
13 |
Correct |
1 ms |
12636 KB |
Output is correct |
14 |
Correct |
1 ms |
12636 KB |
Output is correct |
15 |
Correct |
1 ms |
12636 KB |
Output is correct |
16 |
Correct |
1 ms |
12636 KB |
Output is correct |
17 |
Correct |
1 ms |
12636 KB |
Output is correct |
18 |
Correct |
1 ms |
12636 KB |
Output is correct |
19 |
Correct |
1 ms |
12636 KB |
Output is correct |
20 |
Correct |
1 ms |
12632 KB |
Output is correct |
21 |
Correct |
1 ms |
12636 KB |
Output is correct |
22 |
Correct |
1 ms |
12636 KB |
Output is correct |
23 |
Correct |
1 ms |
12636 KB |
Output is correct |
24 |
Correct |
1 ms |
12636 KB |
Output is correct |
25 |
Correct |
1 ms |
12636 KB |
Output is correct |
26 |
Correct |
1 ms |
12636 KB |
Output is correct |
27 |
Correct |
2 ms |
12636 KB |
Output is correct |
28 |
Correct |
1 ms |
12632 KB |
Output is correct |
29 |
Correct |
1 ms |
12632 KB |
Output is correct |
30 |
Correct |
1 ms |
12636 KB |
Output is correct |
31 |
Correct |
1 ms |
12636 KB |
Output is correct |
32 |
Correct |
1 ms |
12636 KB |
Output is correct |
33 |
Correct |
1 ms |
12636 KB |
Output is correct |
34 |
Correct |
1 ms |
12632 KB |
Output is correct |
35 |
Correct |
1 ms |
12632 KB |
Output is correct |
36 |
Correct |
1 ms |
12632 KB |
Output is correct |
37 |
Correct |
1 ms |
12636 KB |
Output is correct |
38 |
Correct |
1 ms |
12636 KB |
Output is correct |
39 |
Correct |
2 ms |
12632 KB |
Output is correct |
40 |
Correct |
1 ms |
12636 KB |
Output is correct |
41 |
Correct |
2 ms |
12636 KB |
Output is correct |
42 |
Correct |
2 ms |
12636 KB |
Output is correct |
43 |
Correct |
1 ms |
12636 KB |
Output is correct |
44 |
Correct |
1 ms |
12636 KB |
Output is correct |
45 |
Correct |
1 ms |
12636 KB |
Output is correct |
46 |
Correct |
1 ms |
12636 KB |
Output is correct |
47 |
Correct |
1 ms |
12636 KB |
Output is correct |
48 |
Correct |
1 ms |
12636 KB |
Output is correct |
49 |
Correct |
1 ms |
12740 KB |
Output is correct |
50 |
Correct |
1 ms |
12636 KB |
Output is correct |
51 |
Correct |
1 ms |
12636 KB |
Output is correct |
52 |
Correct |
1 ms |
12636 KB |
Output is correct |
53 |
Correct |
1 ms |
12636 KB |
Output is correct |
54 |
Correct |
1 ms |
12632 KB |
Output is correct |
55 |
Correct |
2 ms |
12636 KB |
Output is correct |
56 |
Correct |
1 ms |
12636 KB |
Output is correct |
57 |
Correct |
159 ms |
129556 KB |
Output is correct |
58 |
Correct |
157 ms |
136636 KB |
Output is correct |
59 |
Correct |
156 ms |
136624 KB |
Output is correct |
60 |
Correct |
159 ms |
136416 KB |
Output is correct |
61 |
Correct |
163 ms |
137320 KB |
Output is correct |
62 |
Correct |
156 ms |
136708 KB |
Output is correct |
63 |
Correct |
161 ms |
136372 KB |
Output is correct |
64 |
Correct |
158 ms |
136368 KB |
Output is correct |
65 |
Correct |
164 ms |
136456 KB |
Output is correct |
66 |
Correct |
154 ms |
136368 KB |
Output is correct |
67 |
Correct |
159 ms |
137140 KB |
Output is correct |
68 |
Correct |
162 ms |
136356 KB |
Output is correct |
69 |
Correct |
1 ms |
12632 KB |
Output is correct |
70 |
Correct |
1 ms |
12632 KB |
Output is correct |
71 |
Correct |
1 ms |
12636 KB |
Output is correct |
72 |
Correct |
1 ms |
12752 KB |
Output is correct |
73 |
Correct |
1 ms |
12636 KB |
Output is correct |
74 |
Correct |
1 ms |
12636 KB |
Output is correct |
75 |
Correct |
1 ms |
12636 KB |
Output is correct |
76 |
Correct |
1 ms |
12748 KB |
Output is correct |
77 |
Correct |
1 ms |
12636 KB |
Output is correct |
78 |
Correct |
1 ms |
12636 KB |
Output is correct |
79 |
Correct |
1 ms |
12636 KB |
Output is correct |
80 |
Correct |
1 ms |
12636 KB |
Output is correct |
81 |
Correct |
1 ms |
12636 KB |
Output is correct |
82 |
Correct |
1 ms |
12636 KB |
Output is correct |
83 |
Correct |
1 ms |
12636 KB |
Output is correct |
84 |
Correct |
1 ms |
12636 KB |
Output is correct |
85 |
Correct |
1 ms |
12636 KB |
Output is correct |
86 |
Correct |
1 ms |
12636 KB |
Output is correct |
87 |
Correct |
1 ms |
12636 KB |
Output is correct |
88 |
Correct |
1 ms |
12636 KB |
Output is correct |
89 |
Correct |
2 ms |
12636 KB |
Output is correct |
90 |
Correct |
1 ms |
12636 KB |
Output is correct |
91 |
Correct |
1 ms |
12636 KB |
Output is correct |
92 |
Correct |
1 ms |
12632 KB |
Output is correct |
93 |
Correct |
1 ms |
12636 KB |
Output is correct |
94 |
Correct |
1 ms |
12636 KB |
Output is correct |
95 |
Correct |
2 ms |
12636 KB |
Output is correct |
96 |
Correct |
1 ms |
12632 KB |
Output is correct |
97 |
Correct |
1 ms |
12888 KB |
Output is correct |
98 |
Correct |
1 ms |
12636 KB |
Output is correct |
99 |
Correct |
1 ms |
12636 KB |
Output is correct |
100 |
Correct |
118 ms |
80568 KB |
Output is correct |
101 |
Correct |
159 ms |
80560 KB |
Output is correct |
102 |
Correct |
111 ms |
80048 KB |
Output is correct |
103 |
Correct |
113 ms |
79824 KB |
Output is correct |
104 |
Correct |
108 ms |
80048 KB |
Output is correct |
105 |
Correct |
138 ms |
101112 KB |
Output is correct |
106 |
Correct |
134 ms |
100824 KB |
Output is correct |
107 |
Correct |
127 ms |
100784 KB |
Output is correct |
108 |
Correct |
157 ms |
101496 KB |
Output is correct |
109 |
Correct |
127 ms |
100784 KB |
Output is correct |
110 |
Correct |
121 ms |
80308 KB |
Output is correct |
111 |
Correct |
120 ms |
79828 KB |
Output is correct |
112 |
Correct |
115 ms |
80564 KB |
Output is correct |
113 |
Correct |
115 ms |
80048 KB |
Output is correct |
114 |
Correct |
117 ms |
79824 KB |
Output is correct |
115 |
Correct |
158 ms |
136888 KB |
Output is correct |
116 |
Correct |
160 ms |
136372 KB |
Output is correct |
117 |
Correct |
161 ms |
136508 KB |
Output is correct |
118 |
Correct |
178 ms |
136496 KB |
Output is correct |
119 |
Correct |
165 ms |
137136 KB |
Output is correct |
120 |
Correct |
114 ms |
80052 KB |
Output is correct |
121 |
Correct |
115 ms |
80048 KB |
Output is correct |
122 |
Correct |
122 ms |
80048 KB |
Output is correct |
123 |
Correct |
125 ms |
80052 KB |
Output is correct |
124 |
Correct |
128 ms |
111280 KB |
Output is correct |
125 |
Correct |
151 ms |
111544 KB |
Output is correct |
126 |
Correct |
135 ms |
111284 KB |
Output is correct |
127 |
Correct |
128 ms |
111284 KB |
Output is correct |
128 |
Correct |
59 ms |
49068 KB |
Output is correct |
129 |
Correct |
54 ms |
48828 KB |
Output is correct |
130 |
Correct |
54 ms |
48824 KB |
Output is correct |
131 |
Correct |
1 ms |
12636 KB |
Output is correct |