Problem	swapbuildings
User	StormyGood
Submission Time	2025-12-30 09:12:33
Score	0
Max Time	N/A
Max Memory	N/A

Compile Error

swapbuildings.cpp: In function ‘int main()’:
swapbuildings.cpp:18:18: error: base operand of ‘->’ has non-pointer type ‘std::pair<const long long int, long long int>’
18 | invalid += (i->second)*(i->second-1)/2;
| ^~
swapbuildings.cpp:18:30: error: base operand of ‘->’ has non-pointer type ‘std::pair<const long long int, long long int>’
18 | invalid += (i->second)*(i->second-1)/2;
| ^~