Submission #539709

#	Time	Username	Problem	Language	Result	Execution time	Memory
539709		Eug1ena	Roller Coaster Railroad (IOI16_railroad)	C++14	Compilation error	0 ms	0 KiB

railroad

#include <bits/stdc++.h>
using namespace std;
using lint = long long;
#define rep(i, n) for(int i = 0; i < int(n); i++)
#define rep2(i, l, n) for(int i = int(l); i < int(n); i++)
#define repr(i, n) for(int i = int(n) - 1; i >= 0; i--)
#define all(x) (x).begin(), (x).end()
inline int has(lint x, int k){ return (x >> k) & 1; };

lint plan_roller_coaster(vector<int> s_in, vector<int> t_in){
    int n = int(s_in.size());
    n++;

    int a[n], b[n];
    rep(i, n - 1){
        a[i] = s_in[i];
        b[i] = t_in[i];
    }
    a[n - 1] = 1e9 + 100;
    b[n - 1] = 1;

    vector<int> nums;
    rep(i, n){
        nums.push_back(a[i]);
        nums.push_back(b[i]);
    }
    sort(all(nums));
    nums.erase(unique(all(nums)), nums.end());

    int sz = int(nums.size());
    vector<int> deg(sz, 0);
    rep(i, n){
        int a_idx = int(lower_bound(all(nums), a[i]) - nums.begin());
        int b_idx = int(lower_bound(all(nums), b[i]) - nums.begin());

        deg[a_idx]--;
        deg[b_idx]++;
    }

    int sum = deg[0];
    vector<int> big_light(sz - 1);
    rep(i, n - 1){
        big_light[i] = sum;

        sum += deg[i];
    }

    rep(i, n - 1){
        if(big_light[i] < 0){
            return 1;
        }
    }
    return 0;
}

int main(){
    // vector<int> s{1, 4, 5, 6};
    // vector<int> t{7, 3, 8, 6};
    // cout << plan_roller_coaster(s, t) << endl; // 3


    vector<int> s{1, 5, 3};
    vector<int> t{4, 2, 6};
    cout << plan_roller_coaster(s, t) << endl; // 0
}

Compilation message (stderr)

/usr/bin/ld: /tmp/cck3H8g3.o: in function `main':
grader.cpp:(.text.startup+0x0): multiple definition of `main'; /tmp/ccqVTwz6.o:railroad.cpp:(.text.startup+0x0): first defined here
collect2: error: ld returned 1 exit status