Submission #546899

#	Time	Username	Problem	Language	Result	Execution time	Memory
546899		fvogel499	Roller Coaster Railroad (IOI16_railroad)	C++17	Compilation error	0 ms	0 KiB

railroad

/*
 * File created on 04/08/2022 at 21:58:56.
 * Link to problem: 
 * Description: 
 * Time complexity: O()
 * Space complexity: O()
 * Status: ---
 * Copyright: Ⓒ 2022 Francois Vogel
*/

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#include <functional>

using namespace std;
using namespace __gnu_pbds;

#define pii pair<int, int>
#define f first
#define s second

#define vi vector<int>
#define all(x) x.begin(), x.end()
#define size(x) (int)((x).size())
#define pb push_back
#define ins insert
#define cls clear

#define itn ll
#define ll long long
#define ld long double

typedef tree<int, null_type, less<int>, rb_tree_tag, tree_order_statistics_node_update> ordered_set;

ll plan_roller_coaster(vi& from, vi& to) {
    map<int, int> m;
    for (int i = 0; i < size(from); i++) {
        if (!m.count(from[i])) m[from[i]] = i;
        m[from[i]]++;
        if (!m.count(to[i])) m[to[i]] = i;
        m[to[i]]--;
    }
    int sum = 0;
    for (auto i : m) {
        sum += i.s;
        if (sum > 1) return 1;
    }
    return 0;
}

signed main() {
    cin.tie(0);
    ios_base::sync_with_stdio(0);

    int n;
    cin >> n;
    vi from(n), to(n);
    for (int i = 0; i < n; i++) cin >> from[i];
    for (int i = 0; i < n; i++) cin >> to[i];
    cout << plan_roller_coaster(from, to) << endl;

    cout.flush();
    int d = 0;
    d++;
}

Compilation message (stderr)

/usr/bin/ld: /tmp/cc1bxBhs.o: in function `main':
grader.cpp:(.text.startup+0x0): multiple definition of `main'; /tmp/ccbH3zfs.o:railroad.cpp:(.text.startup+0x0): first defined here
/usr/bin/ld: /tmp/cc1bxBhs.o: in function `main':
grader.cpp:(.text.startup+0xf4): undefined reference to `plan_roller_coaster(std::vector<int, std::allocator<int> >, std::vector<int, std::allocator<int> >)'
collect2: error: ld returned 1 exit status