Submission #1188526

#	Time	Username	Problem	Language	Result	Execution time	Memory
1188526		qwusha	Flight to the Ford (BOI22_communication)	C++20	Compilation error	0 ms	0 KiB

communication

#include <bits/stdc++.h>
using namespace std;
#define fi first
#define se second
typedef long long ll;
typedef long double ld;
mt19937 rnd(chrono::high_resolution_clock::now().time_since_epoch().count());
#define int long long
#define ld long double

signed main() {
    string s;
    cin >> s;
    int n = s.size();
    ld res = 0;
    for (int i = 0; i < n / 2; i++) {
        res += i;
    }
    for (int i = n - 1; i >= n / 2; i--) {
        res += (n - 1 - i);
    }
    res /= 2;
    cout << setprecision(15) << res << '\n';
}

Compilation message (stderr)

/usr/bin/ld: /tmp/cctTnnyW.o: in function `main':
interface.cpp:(.text.startup+0x0): multiple definition of `main'; /tmp/ccLYZwut.o:communication.cpp:(.text.startup+0x0): first defined here
/usr/bin/ld: /tmp/cctTnnyW.o: in function `_do_encode(int, int)':
interface.cpp:(.text+0x1d9): undefined reference to `encode(int, int)'
/usr/bin/ld: /tmp/cctTnnyW.o: in function `_do_decode(int)':
interface.cpp:(.text+0x219): undefined reference to `decode(int)'
/usr/bin/ld: /tmp/cctTnnyW.o: in function `main':
interface.cpp:(.text.startup+0xc2): undefined reference to `decode(int)'
/usr/bin/ld: interface.cpp:(.text.startup+0x16e): undefined reference to `encode(int, int)'
collect2: error: ld returned 1 exit status