// Programmer: Shadow1
#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using ld = long double;
using ull = unsigned long long;
using str = string; // yay python!
#define i64 int64_t
#define watch(x) cerr << (#x) << " = " << (x) << '\n';
#define output_vector(v) for(auto &x : v){cout << x << " ";}cout << '\n';
#define vt vector
#define st stack
#define pq priority_queue
#define pb push_back
#define eb emplace_back
#define pii pair<int,int>
#define umap unordered_map
#define uset unordered_set
#define fir first
#define sec second
#define sz(x) int(x.size())
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(), x.rend()
// T: O(n^3)
// M : O(n + k log n)
void solve() {
int n;
cin >> n;
vector<int> d(n-1), ans(n);
for(auto &D : d) {
cin >> D;
}
int64_t mx = 0, mn = 0;
int64_t sum = 0;
for(auto &D : d) {
sum += D;
mx = max(mx, sum);
mn = min(mn, sum);
}
// watch(mx);
// watch(mn);
if(mx - mn == n-1) {
ans[0] = n - mx;
for(int i=1; i<n; ++i) {
ans[i] = d[i-1] + ans[i-1];
}
output_vector(ans);
} else {
cout << -1 << '\n';
}
}
int main() {
// freopen("output.txt", "w", stdout);
// freopen("input.txt", "r", stdin);
ios::sync_with_stdio(false);
cin.tie(NULL);
solve();
return 0;
}
/* CHECK :
1. COMPARATOR FUNCTION MUST RETURN FALSE WHEN ARGUMENTS ARE EQUAL!!!
2. Overflow! Typecase int64_t on operations if varaibles are int
3. Check array bounds!!!
4. Check array indexing!!!
5. Edge cases. (N==1)!!!
*/
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
0 ms |
344 KB |
Output is correct |
2 |
Correct |
0 ms |
348 KB |
Output is correct |
3 |
Correct |
0 ms |
348 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
0 ms |
344 KB |
Output is correct |
2 |
Correct |
0 ms |
348 KB |
Output is correct |
3 |
Correct |
0 ms |
348 KB |
Output is correct |
4 |
Correct |
0 ms |
348 KB |
Output is correct |
5 |
Correct |
0 ms |
348 KB |
Output is correct |
6 |
Correct |
0 ms |
344 KB |
Output is correct |
7 |
Correct |
0 ms |
348 KB |
Output is correct |
8 |
Correct |
0 ms |
344 KB |
Output is correct |
9 |
Correct |
0 ms |
344 KB |
Output is correct |
10 |
Correct |
0 ms |
348 KB |
Output is correct |
11 |
Correct |
0 ms |
348 KB |
Output is correct |
12 |
Correct |
0 ms |
348 KB |
Output is correct |
13 |
Correct |
0 ms |
452 KB |
Output is correct |
14 |
Correct |
0 ms |
348 KB |
Output is correct |
15 |
Correct |
0 ms |
348 KB |
Output is correct |
16 |
Correct |
0 ms |
348 KB |
Output is correct |
17 |
Correct |
0 ms |
348 KB |
Output is correct |
18 |
Correct |
0 ms |
344 KB |
Output is correct |
19 |
Correct |
0 ms |
348 KB |
Output is correct |
20 |
Correct |
0 ms |
348 KB |
Output is correct |
21 |
Correct |
0 ms |
456 KB |
Output is correct |
22 |
Correct |
0 ms |
348 KB |
Output is correct |
23 |
Correct |
0 ms |
348 KB |
Output is correct |
24 |
Correct |
0 ms |
344 KB |
Output is correct |
25 |
Correct |
0 ms |
348 KB |
Output is correct |
26 |
Correct |
0 ms |
456 KB |
Output is correct |
27 |
Correct |
0 ms |
348 KB |
Output is correct |
28 |
Correct |
1 ms |
348 KB |
Output is correct |
29 |
Correct |
0 ms |
348 KB |
Output is correct |
30 |
Correct |
1 ms |
348 KB |
Output is correct |
31 |
Correct |
0 ms |
456 KB |
Output is correct |
32 |
Correct |
0 ms |
348 KB |
Output is correct |
33 |
Correct |
0 ms |
348 KB |
Output is correct |
34 |
Correct |
0 ms |
348 KB |
Output is correct |
35 |
Correct |
0 ms |
456 KB |
Output is correct |
36 |
Correct |
0 ms |
348 KB |
Output is correct |
37 |
Correct |
0 ms |
348 KB |
Output is correct |
38 |
Correct |
0 ms |
348 KB |
Output is correct |
39 |
Correct |
0 ms |
348 KB |
Output is correct |
40 |
Correct |
0 ms |
348 KB |
Output is correct |
41 |
Correct |
0 ms |
348 KB |
Output is correct |
42 |
Correct |
0 ms |
348 KB |
Output is correct |
43 |
Correct |
1 ms |
348 KB |
Output is correct |
44 |
Correct |
0 ms |
348 KB |
Output is correct |
45 |
Correct |
0 ms |
348 KB |
Output is correct |
46 |
Correct |
0 ms |
348 KB |
Output is correct |
47 |
Correct |
0 ms |
348 KB |
Output is correct |
48 |
Correct |
1 ms |
348 KB |
Output is correct |
49 |
Correct |
0 ms |
348 KB |
Output is correct |
50 |
Correct |
0 ms |
348 KB |
Output is correct |
51 |
Correct |
0 ms |
348 KB |
Output is correct |
52 |
Correct |
1 ms |
348 KB |
Output is correct |
53 |
Correct |
0 ms |
348 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
0 ms |
344 KB |
Output is correct |
2 |
Correct |
0 ms |
348 KB |
Output is correct |
3 |
Correct |
0 ms |
348 KB |
Output is correct |
4 |
Correct |
0 ms |
348 KB |
Output is correct |
5 |
Correct |
0 ms |
348 KB |
Output is correct |
6 |
Correct |
0 ms |
344 KB |
Output is correct |
7 |
Correct |
0 ms |
348 KB |
Output is correct |
8 |
Correct |
0 ms |
344 KB |
Output is correct |
9 |
Correct |
0 ms |
344 KB |
Output is correct |
10 |
Correct |
0 ms |
348 KB |
Output is correct |
11 |
Correct |
0 ms |
348 KB |
Output is correct |
12 |
Correct |
0 ms |
348 KB |
Output is correct |
13 |
Correct |
0 ms |
452 KB |
Output is correct |
14 |
Correct |
0 ms |
348 KB |
Output is correct |
15 |
Correct |
0 ms |
348 KB |
Output is correct |
16 |
Correct |
0 ms |
348 KB |
Output is correct |
17 |
Correct |
0 ms |
348 KB |
Output is correct |
18 |
Correct |
0 ms |
344 KB |
Output is correct |
19 |
Correct |
0 ms |
348 KB |
Output is correct |
20 |
Correct |
0 ms |
348 KB |
Output is correct |
21 |
Correct |
0 ms |
456 KB |
Output is correct |
22 |
Correct |
0 ms |
348 KB |
Output is correct |
23 |
Correct |
0 ms |
348 KB |
Output is correct |
24 |
Correct |
0 ms |
344 KB |
Output is correct |
25 |
Correct |
0 ms |
348 KB |
Output is correct |
26 |
Correct |
0 ms |
456 KB |
Output is correct |
27 |
Correct |
0 ms |
348 KB |
Output is correct |
28 |
Correct |
1 ms |
348 KB |
Output is correct |
29 |
Correct |
0 ms |
348 KB |
Output is correct |
30 |
Correct |
1 ms |
348 KB |
Output is correct |
31 |
Correct |
0 ms |
456 KB |
Output is correct |
32 |
Correct |
0 ms |
348 KB |
Output is correct |
33 |
Correct |
0 ms |
348 KB |
Output is correct |
34 |
Correct |
0 ms |
348 KB |
Output is correct |
35 |
Correct |
0 ms |
456 KB |
Output is correct |
36 |
Correct |
0 ms |
348 KB |
Output is correct |
37 |
Correct |
0 ms |
348 KB |
Output is correct |
38 |
Correct |
0 ms |
348 KB |
Output is correct |
39 |
Correct |
0 ms |
348 KB |
Output is correct |
40 |
Correct |
0 ms |
348 KB |
Output is correct |
41 |
Correct |
0 ms |
348 KB |
Output is correct |
42 |
Correct |
0 ms |
348 KB |
Output is correct |
43 |
Correct |
1 ms |
348 KB |
Output is correct |
44 |
Correct |
0 ms |
348 KB |
Output is correct |
45 |
Correct |
0 ms |
348 KB |
Output is correct |
46 |
Correct |
0 ms |
348 KB |
Output is correct |
47 |
Correct |
0 ms |
348 KB |
Output is correct |
48 |
Correct |
1 ms |
348 KB |
Output is correct |
49 |
Correct |
0 ms |
348 KB |
Output is correct |
50 |
Correct |
0 ms |
348 KB |
Output is correct |
51 |
Correct |
0 ms |
348 KB |
Output is correct |
52 |
Correct |
1 ms |
348 KB |
Output is correct |
53 |
Correct |
0 ms |
348 KB |
Output is correct |
54 |
Correct |
1 ms |
344 KB |
Output is correct |
55 |
Correct |
0 ms |
348 KB |
Output is correct |
56 |
Correct |
0 ms |
348 KB |
Output is correct |
57 |
Correct |
1 ms |
348 KB |
Output is correct |
58 |
Correct |
0 ms |
348 KB |
Output is correct |
59 |
Correct |
0 ms |
348 KB |
Output is correct |
60 |
Correct |
1 ms |
348 KB |
Output is correct |
61 |
Correct |
0 ms |
348 KB |
Output is correct |
62 |
Correct |
1 ms |
348 KB |
Output is correct |
63 |
Correct |
0 ms |
348 KB |
Output is correct |
64 |
Correct |
0 ms |
348 KB |
Output is correct |
65 |
Correct |
0 ms |
348 KB |
Output is correct |
66 |
Correct |
0 ms |
348 KB |
Output is correct |
67 |
Correct |
0 ms |
348 KB |
Output is correct |
68 |
Correct |
1 ms |
348 KB |
Output is correct |
69 |
Correct |
0 ms |
348 KB |
Output is correct |
70 |
Correct |
0 ms |
348 KB |
Output is correct |
71 |
Correct |
0 ms |
348 KB |
Output is correct |
72 |
Correct |
0 ms |
348 KB |
Output is correct |
73 |
Correct |
0 ms |
348 KB |
Output is correct |
74 |
Correct |
0 ms |
348 KB |
Output is correct |
75 |
Correct |
0 ms |
348 KB |
Output is correct |
76 |
Correct |
1 ms |
344 KB |
Output is correct |
77 |
Correct |
1 ms |
348 KB |
Output is correct |
78 |
Correct |
0 ms |
348 KB |
Output is correct |
79 |
Correct |
0 ms |
344 KB |
Output is correct |
80 |
Correct |
0 ms |
348 KB |
Output is correct |
81 |
Correct |
0 ms |
428 KB |
Output is correct |
82 |
Correct |
1 ms |
348 KB |
Output is correct |
83 |
Correct |
0 ms |
348 KB |
Output is correct |
84 |
Correct |
0 ms |
348 KB |
Output is correct |
85 |
Correct |
1 ms |
348 KB |
Output is correct |
86 |
Correct |
0 ms |
352 KB |
Output is correct |
87 |
Correct |
0 ms |
348 KB |
Output is correct |
88 |
Correct |
1 ms |
604 KB |
Output is correct |
89 |
Correct |
0 ms |
348 KB |
Output is correct |
90 |
Correct |
0 ms |
348 KB |
Output is correct |
91 |
Correct |
0 ms |
348 KB |
Output is correct |
92 |
Correct |
0 ms |
348 KB |
Output is correct |
93 |
Correct |
0 ms |
348 KB |
Output is correct |
94 |
Correct |
1 ms |
348 KB |
Output is correct |
95 |
Correct |
0 ms |
348 KB |
Output is correct |
96 |
Correct |
0 ms |
348 KB |
Output is correct |
97 |
Correct |
0 ms |
348 KB |
Output is correct |
98 |
Correct |
0 ms |
348 KB |
Output is correct |
99 |
Correct |
0 ms |
344 KB |
Output is correct |
100 |
Correct |
0 ms |
348 KB |
Output is correct |
101 |
Correct |
0 ms |
456 KB |
Output is correct |
102 |
Correct |
0 ms |
348 KB |
Output is correct |
103 |
Correct |
0 ms |
348 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
25 ms |
5212 KB |
Output is correct |
2 |
Correct |
1 ms |
348 KB |
Output is correct |
3 |
Correct |
26 ms |
5456 KB |
Output is correct |
4 |
Correct |
11 ms |
3160 KB |
Output is correct |
5 |
Correct |
13 ms |
3420 KB |
Output is correct |
6 |
Correct |
13 ms |
3420 KB |
Output is correct |
7 |
Correct |
12 ms |
3164 KB |
Output is correct |
8 |
Correct |
13 ms |
3420 KB |
Output is correct |
9 |
Correct |
0 ms |
348 KB |
Output is correct |
10 |
Correct |
0 ms |
460 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
0 ms |
344 KB |
Output is correct |
2 |
Correct |
0 ms |
348 KB |
Output is correct |
3 |
Correct |
0 ms |
348 KB |
Output is correct |
4 |
Correct |
0 ms |
348 KB |
Output is correct |
5 |
Correct |
0 ms |
348 KB |
Output is correct |
6 |
Correct |
0 ms |
344 KB |
Output is correct |
7 |
Correct |
0 ms |
348 KB |
Output is correct |
8 |
Correct |
0 ms |
344 KB |
Output is correct |
9 |
Correct |
0 ms |
344 KB |
Output is correct |
10 |
Correct |
0 ms |
348 KB |
Output is correct |
11 |
Correct |
0 ms |
348 KB |
Output is correct |
12 |
Correct |
0 ms |
348 KB |
Output is correct |
13 |
Correct |
0 ms |
452 KB |
Output is correct |
14 |
Correct |
0 ms |
348 KB |
Output is correct |
15 |
Correct |
0 ms |
348 KB |
Output is correct |
16 |
Correct |
0 ms |
348 KB |
Output is correct |
17 |
Correct |
0 ms |
348 KB |
Output is correct |
18 |
Correct |
0 ms |
344 KB |
Output is correct |
19 |
Correct |
0 ms |
348 KB |
Output is correct |
20 |
Correct |
0 ms |
348 KB |
Output is correct |
21 |
Correct |
0 ms |
456 KB |
Output is correct |
22 |
Correct |
0 ms |
348 KB |
Output is correct |
23 |
Correct |
0 ms |
348 KB |
Output is correct |
24 |
Correct |
0 ms |
344 KB |
Output is correct |
25 |
Correct |
0 ms |
348 KB |
Output is correct |
26 |
Correct |
0 ms |
456 KB |
Output is correct |
27 |
Correct |
0 ms |
348 KB |
Output is correct |
28 |
Correct |
1 ms |
348 KB |
Output is correct |
29 |
Correct |
0 ms |
348 KB |
Output is correct |
30 |
Correct |
1 ms |
348 KB |
Output is correct |
31 |
Correct |
0 ms |
456 KB |
Output is correct |
32 |
Correct |
0 ms |
348 KB |
Output is correct |
33 |
Correct |
0 ms |
348 KB |
Output is correct |
34 |
Correct |
0 ms |
348 KB |
Output is correct |
35 |
Correct |
0 ms |
456 KB |
Output is correct |
36 |
Correct |
0 ms |
348 KB |
Output is correct |
37 |
Correct |
0 ms |
348 KB |
Output is correct |
38 |
Correct |
0 ms |
348 KB |
Output is correct |
39 |
Correct |
0 ms |
348 KB |
Output is correct |
40 |
Correct |
0 ms |
348 KB |
Output is correct |
41 |
Correct |
0 ms |
348 KB |
Output is correct |
42 |
Correct |
0 ms |
348 KB |
Output is correct |
43 |
Correct |
1 ms |
348 KB |
Output is correct |
44 |
Correct |
0 ms |
348 KB |
Output is correct |
45 |
Correct |
0 ms |
348 KB |
Output is correct |
46 |
Correct |
0 ms |
348 KB |
Output is correct |
47 |
Correct |
0 ms |
348 KB |
Output is correct |
48 |
Correct |
1 ms |
348 KB |
Output is correct |
49 |
Correct |
0 ms |
348 KB |
Output is correct |
50 |
Correct |
0 ms |
348 KB |
Output is correct |
51 |
Correct |
0 ms |
348 KB |
Output is correct |
52 |
Correct |
1 ms |
348 KB |
Output is correct |
53 |
Correct |
0 ms |
348 KB |
Output is correct |
54 |
Correct |
1 ms |
344 KB |
Output is correct |
55 |
Correct |
0 ms |
348 KB |
Output is correct |
56 |
Correct |
0 ms |
348 KB |
Output is correct |
57 |
Correct |
1 ms |
348 KB |
Output is correct |
58 |
Correct |
0 ms |
348 KB |
Output is correct |
59 |
Correct |
0 ms |
348 KB |
Output is correct |
60 |
Correct |
1 ms |
348 KB |
Output is correct |
61 |
Correct |
0 ms |
348 KB |
Output is correct |
62 |
Correct |
1 ms |
348 KB |
Output is correct |
63 |
Correct |
0 ms |
348 KB |
Output is correct |
64 |
Correct |
0 ms |
348 KB |
Output is correct |
65 |
Correct |
0 ms |
348 KB |
Output is correct |
66 |
Correct |
0 ms |
348 KB |
Output is correct |
67 |
Correct |
0 ms |
348 KB |
Output is correct |
68 |
Correct |
1 ms |
348 KB |
Output is correct |
69 |
Correct |
0 ms |
348 KB |
Output is correct |
70 |
Correct |
0 ms |
348 KB |
Output is correct |
71 |
Correct |
0 ms |
348 KB |
Output is correct |
72 |
Correct |
0 ms |
348 KB |
Output is correct |
73 |
Correct |
0 ms |
348 KB |
Output is correct |
74 |
Correct |
0 ms |
348 KB |
Output is correct |
75 |
Correct |
0 ms |
348 KB |
Output is correct |
76 |
Correct |
1 ms |
344 KB |
Output is correct |
77 |
Correct |
1 ms |
348 KB |
Output is correct |
78 |
Correct |
0 ms |
348 KB |
Output is correct |
79 |
Correct |
0 ms |
344 KB |
Output is correct |
80 |
Correct |
0 ms |
348 KB |
Output is correct |
81 |
Correct |
0 ms |
428 KB |
Output is correct |
82 |
Correct |
1 ms |
348 KB |
Output is correct |
83 |
Correct |
0 ms |
348 KB |
Output is correct |
84 |
Correct |
0 ms |
348 KB |
Output is correct |
85 |
Correct |
1 ms |
348 KB |
Output is correct |
86 |
Correct |
0 ms |
352 KB |
Output is correct |
87 |
Correct |
0 ms |
348 KB |
Output is correct |
88 |
Correct |
1 ms |
604 KB |
Output is correct |
89 |
Correct |
0 ms |
348 KB |
Output is correct |
90 |
Correct |
0 ms |
348 KB |
Output is correct |
91 |
Correct |
0 ms |
348 KB |
Output is correct |
92 |
Correct |
0 ms |
348 KB |
Output is correct |
93 |
Correct |
0 ms |
348 KB |
Output is correct |
94 |
Correct |
1 ms |
348 KB |
Output is correct |
95 |
Correct |
0 ms |
348 KB |
Output is correct |
96 |
Correct |
0 ms |
348 KB |
Output is correct |
97 |
Correct |
0 ms |
348 KB |
Output is correct |
98 |
Correct |
0 ms |
348 KB |
Output is correct |
99 |
Correct |
0 ms |
344 KB |
Output is correct |
100 |
Correct |
0 ms |
348 KB |
Output is correct |
101 |
Correct |
0 ms |
456 KB |
Output is correct |
102 |
Correct |
0 ms |
348 KB |
Output is correct |
103 |
Correct |
0 ms |
348 KB |
Output is correct |
104 |
Correct |
25 ms |
5212 KB |
Output is correct |
105 |
Correct |
1 ms |
348 KB |
Output is correct |
106 |
Correct |
26 ms |
5456 KB |
Output is correct |
107 |
Correct |
11 ms |
3160 KB |
Output is correct |
108 |
Correct |
13 ms |
3420 KB |
Output is correct |
109 |
Correct |
13 ms |
3420 KB |
Output is correct |
110 |
Correct |
12 ms |
3164 KB |
Output is correct |
111 |
Correct |
13 ms |
3420 KB |
Output is correct |
112 |
Correct |
0 ms |
348 KB |
Output is correct |
113 |
Correct |
0 ms |
460 KB |
Output is correct |
114 |
Correct |
19 ms |
4700 KB |
Output is correct |
115 |
Correct |
34 ms |
6740 KB |
Output is correct |
116 |
Correct |
19 ms |
4696 KB |
Output is correct |
117 |
Correct |
18 ms |
4592 KB |
Output is correct |
118 |
Correct |
35 ms |
6568 KB |
Output is correct |
119 |
Correct |
20 ms |
4696 KB |
Output is correct |
120 |
Correct |
34 ms |
6740 KB |
Output is correct |
121 |
Correct |
34 ms |
6764 KB |
Output is correct |
122 |
Correct |
35 ms |
6756 KB |
Output is correct |
123 |
Correct |
19 ms |
4696 KB |
Output is correct |
124 |
Correct |
36 ms |
6812 KB |
Output is correct |
125 |
Correct |
34 ms |
6624 KB |
Output is correct |
126 |
Correct |
42 ms |
6828 KB |
Output is correct |
127 |
Correct |
36 ms |
6608 KB |
Output is correct |
128 |
Correct |
18 ms |
4700 KB |
Output is correct |
129 |
Correct |
34 ms |
6764 KB |
Output is correct |
130 |
Correct |
43 ms |
6736 KB |
Output is correct |
131 |
Correct |
38 ms |
6740 KB |
Output is correct |
132 |
Correct |
35 ms |
6600 KB |
Output is correct |
133 |
Correct |
35 ms |
6736 KB |
Output is correct |
134 |
Correct |
23 ms |
4700 KB |
Output is correct |
135 |
Correct |
36 ms |
6744 KB |
Output is correct |
136 |
Correct |
21 ms |
4700 KB |
Output is correct |
137 |
Correct |
23 ms |
4700 KB |
Output is correct |
138 |
Correct |
21 ms |
4656 KB |
Output is correct |
139 |
Correct |
19 ms |
4700 KB |
Output is correct |
140 |
Correct |
18 ms |
4700 KB |
Output is correct |
141 |
Correct |
18 ms |
4596 KB |
Output is correct |
142 |
Correct |
47 ms |
6736 KB |
Output is correct |
143 |
Correct |
19 ms |
4700 KB |
Output is correct |
144 |
Correct |
20 ms |
4688 KB |
Output is correct |
145 |
Correct |
44 ms |
6732 KB |
Output is correct |
146 |
Correct |
34 ms |
6764 KB |
Output is correct |
147 |
Correct |
37 ms |
6628 KB |
Output is correct |
148 |
Correct |
34 ms |
6688 KB |
Output is correct |
149 |
Correct |
26 ms |
5208 KB |
Output is correct |
150 |
Correct |
29 ms |
5468 KB |
Output is correct |
151 |
Correct |
11 ms |
3160 KB |
Output is correct |
152 |
Correct |
17 ms |
3560 KB |
Output is correct |
153 |
Correct |
18 ms |
3420 KB |
Output is correct |
154 |
Correct |
12 ms |
3164 KB |
Output is correct |
155 |
Correct |
14 ms |
3420 KB |
Output is correct |
156 |
Correct |
0 ms |
348 KB |
Output is correct |
157 |
Correct |
0 ms |
348 KB |
Output is correct |
158 |
Correct |
18 ms |
4584 KB |
Output is correct |
159 |
Correct |
0 ms |
348 KB |
Output is correct |
160 |
Correct |
34 ms |
6628 KB |
Output is correct |
161 |
Correct |
18 ms |
4712 KB |
Output is correct |
162 |
Correct |
19 ms |
4716 KB |
Output is correct |
163 |
Correct |
19 ms |
4720 KB |
Output is correct |