Submission #630663

#	Time	Username	Problem	Language	Result	Execution time	Memory
630663		fadyscube	Arranging Shoes (IOI19_shoes)	C++17	Compilation error	0 ms	0 KiB

shoes

#include <bits/stdc++.h>
#include <vector>

using namespace std;

#define ll long long

int getIndex(vector<int> v, int K) {
    auto it = find(v.begin(), v.end(), K);
    if (it != v.end()) return it - v.begin();
    else return -1;
}

ll count_swaps(vector<int> S, ll ans = 0) {
    if (S.size() == 2) {
        ans += (S[0] > 0) ? 1 : 0;
        return ans;
    } else if (S.size() < 2) return ans;

    int in = getIndex(S, S[0]*-1);
    ans += S[0] > 0 ? in : in-1;
    S.erase(S.begin()+in);
    S.erase(S.begin()+0);
    return count_swaps(S, ans);
}

int main () {
    ll n;
    cin >> n;
    vector<int> v(n*2);

    for (int i = 0; i < n*2; i++)
        cin >> v[i];
    
    cout << count_swaps(v) << endl;

    return 0;
}

Compilation message (stderr)

/usr/bin/ld: /tmp/ccaYUABw.o: in function `main':
grader.cpp:(.text.startup+0x0): multiple definition of `main'; /tmp/ccFnNUkt.o:shoes.cpp:(.text.startup+0x0): first defined here
/usr/bin/ld: /tmp/ccaYUABw.o: in function `main':
grader.cpp:(.text.startup+0x2a8): undefined reference to `count_swaps(std::vector<int, std::allocator<int> >)'
collect2: error: ld returned 1 exit status