Problem	missingnumber
User	caiyt
Submission Time	2026-06-08 19:41:05
Score	0
Max Time	N/A
Max Memory	N/A

Compile Error

missingnumber.cpp: In function ‘int main()’:
missingnumber.cpp:3:5: error: ‘ios_base’ has not been declared
3 | ios_base::sync_with_stdio(false);
| ^~~~~~~~
missingnumber.cpp:4:5: error: ‘cin’ was not declared in this scope
4 | cin.tie(NULL);
| ^~~
missingnumber.cpp:4:13: error: ‘NULL’ was not declared in this scope
4 | cin.tie(NULL);
| ^~~~
missingnumber.cpp:1:1: note: ‘NULL’ is defined in header ‘<cstddef>’; did you forget to ‘#include <cstddef>’?
+++ |+#include <cstddef>
1 |
missingnumber.cpp:9:5: error: ‘vector’ was not declared in this scope
9 | vector<int> a(n - 1);
| ^~~~~~
missingnumber.cpp:9:12: error: expected primary-expression before ‘int’
9 | vector<int> a(n - 1);
| ^~~
missingnumber.cpp:12:16: error: ‘a’ was not declared in this scope
12 | cin >> a[i];