Submission #979275

#	Time	Username	Problem	Language	Result	Execution time	Memory
979275		Zicrus	Counting Mushrooms (IOI20_mushrooms)	C++17	Compilation error	0 ms	0 KiB

mushrooms

#include <bits/stdc++.h>
#include "mushrooms.h"
using namespace std;

typedef long long ll;

int kVal, kA, kB;

void get(vector<ll> &m, int a, int b) {
    ll sol = use_machine({kA, a, kB, b});
    m[a] = (sol >> 1) ^ kVal;
    m[b] = (sol & 1) ^ kVal;
}

int count_mushrooms(int n) {
    if (n == 0) return 0;
    if (n == 1) return 1;
    vector<ll> m(n, 0);
    m[0] = 1;
	ll sol01 = use_machine({0, 1});
    ll sol02;
    if (n <= 2) {
        if (sol01 == 0) m[1] = 1;
        goto end; // Hello
    }
    sol02 = use_machine({0, 2});
    if (sol01 == 0) m[1] = 1;
    if (sol02 == 0) m[2] = 1;
    if (sol01 == 0) {
        kVal = 1;
        kA = 0; kB = 1;
    }
    else if (sol02 == 0) {
        kVal = 1;
        kA = 0; kB = 2;
    }
    else {
        kVal = 0;
        kA = 1; kB = 2;
    }
    for (ll i = 3; i < n-1; i += 2) {
        get(m, i, i+1);
    }
    if (!(n & 1)) {
        get(m, n-2, n-1);
    }

end:
    ll res = 0;
    for (auto &e : m) {
        res += e;
    }
    return res;
}

#ifndef ONLINE_JUDGE
#include "grader.cpp"
#endif

Compilation message (stderr)

/usr/bin/ld: /tmp/ccoIw7wi.o: in function `use_machine(std::vector<int, std::allocator<int> >)':
stub.cpp:(.text+0x150): multiple definition of `use_machine(std::vector<int, std::allocator<int> >)'; /tmp/cch4NwXe.o:mushrooms.cpp:(.text+0x150): first defined here
/usr/bin/ld: /tmp/ccoIw7wi.o: in function `main':
stub.cpp:(.text.startup+0x0): multiple definition of `main'; /tmp/cch4NwXe.o:mushrooms.cpp:(.text.startup+0x0): first defined here
collect2: error: ld returned 1 exit status