제출 #530841

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
530841		M1v1savva	Arranging Shoes (IOI19_shoes)	C++17	컴파일 에러	0 ms	0 KiB

shoes

#include <bits/stdc++.h>

#define int long long
#define sz(x) (int)(x).size()
#define forn(i, x) for (int i = 0; i < (int)x; i++)
#define pb push_back
#define rforn(i, x) for (int i = (int)x - 1; i >= 0; i--)
#define pii pair<int, int>
#define all(x) (x).begin(), (x).end()
#define rall(x) (x).rbegin(), (x).rend()
#define ff first
#define ss second

using namespace std;

template<class T>
void print(T a) {
    for (auto x : a)
        cout << x << ' ';
    cout << endl;
}

//signed main() {
    //freopen("test.txt", "r", stdin);

    // int n;
    // cin >> n;
    // vector<int> a(n * 2);
    // forn (i, n * 2)
    // 	cin >> a[i];
int count_swaps(int S[]) {
	vector<int> a;
	int n = (sizeof(S) / sizeof(S[0])) / 2;
	forn (i, 2 * n)
		a.pb(S[i]);

    map<int, int> scores;
    map<int, int> prev;

    int ans = 0;
    forn (i, 2 * n) {
    	int val = a[i];
    	scores[abs(val)]++;

		if (scores[abs(val)] % 2 == 0) {
			ans += i - prev[abs(val)];
			if (val > 0)
				ans--;
		} else {
			prev[abs(val)] = i;
		}
    }
    return ans;
    //cout << ans << '\n';

    //return 0;
}

컴파일 시 표준 에러 (stderr) 메시지

shoes.cpp: In function 'long long int count_swaps(long long int*)':
shoes.cpp:33:18: warning: 'sizeof' on array function parameter 'S' will return size of 'long long int*' [-Wsizeof-array-argument]
   33 |  int n = (sizeof(S) / sizeof(S[0])) / 2;
      |                 ~^~
shoes.cpp:31:21: note: declared here
   31 | int count_swaps(int S[]) {
      |                     ^
/usr/bin/ld: /tmp/ccHGV6By.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