//#pragma GCC optimize("O3") #include <bits/stdc++.h> #include "shoes.h" using namespace std; long long count_swap(vector<int>nums) { long long ans; if(nums[0]<0) { ans=0; } else { ans=1; } return ans; }

/usr/bin/ld: /tmp/ccehAwDe.o: in function `main':
grader.cpp:(.text.startup+0x26b): undefined reference to `count_swaps(std::vector<int, std::allocator<int> >)'
collect2: error: ld returned 1 exit status