Submission #1253107

#	Time	Username	Problem	Language	Result	Execution time	Memory
1253107		kkzyr	Obstacles for a Llama (IOI25_obstacles)	C++20	Compilation error	0 ms	0 KiB

obstacles

#include <iostream>
#include <vector>
using namespace std;

int parent[1000000];

int find(int x){
    if (parent[x] == -1){
        return x;
    }
    int ans = find(parent[x]);
    parent[x] = ans;
    return ans;
}

void merge(int x, int y){
    int component1 = find(x), component2 = find(y);
    if (component1 != component2){
        parent[component1] = component2;
    }
}

void initialize(std::vector<int> T, std::vector<int> H){
    for (int i = 0;i < H.size();i++){
        parent[i] = -1;
    }
    for (int i = 0;i < H.size();i++){
        if (T[T.size() - 1] > H[i]){
            if (i >= 1 and T[T.size() - 1] > H[i - 1]){
                merge(i, i - 1);
            }
            if (i < (H.size() - 1) and T[T.size() - 1] > H[i + 1]){
                merge(i, i + 1);
            }
        }
    }
}

Compilation message (stderr)

/usr/bin/ld: /tmp/ccUaXRDD.o: in function `main':
grader.cpp:(.text.startup+0x402): undefined reference to `can_reach(int, int, int, int)'
collect2: error: ld returned 1 exit status