Problem	foreveralone
User	yuanbin
Submission Time	2026-07-16 17:54:44
Score	0
Max Time	N/A
Max Memory	N/A

Compile Error

foreveralone.cpp: In function ‘int main()’:
foreveralone.cpp:5:2: error: ‘vector’ was not declared in this scope
5 | vector<bool> hasfren;
| ^~~~~~
foreveralone.cpp:2:1: note: ‘std::vector’ is defined in header ‘<vector>’; did you forget to ‘#include <vector>’?
1 | #include <iostream>
+++ |+#include <vector>
2 | using namespace std;
foreveralone.cpp:5:9: error: expected primary-expression before ‘bool’
5 | vector<bool> hasfren;
| ^~~~
foreveralone.cpp:8:3: error: ‘hasfren’ was not declared in this scope
8 | hasfren.push_back(false);
| ^~~~~~~
foreveralone.cpp:16:4: error: ‘hasfren’ was not declared in this scope
16 | hasfren[id1] = true;
| ^~~~~~~
foreveralone.cpp:22:21: error: invalid types ‘long long int[int]’ for array subscript
22 | if ( !frendships[i]){ alone++ }
| ^
foreveralone.cpp:22: