Submission #117627

#	Time	Username	Problem	Language	Result	Execution time	Memory
117627		Osama_Alkhodairy	Highway Tolls (IOI18_highway)	C++17	Compilation error	0 ms	0 KiB

highway

#include <bits/stdc++.h>
//#include "highway.h"
#include "grader.cpp"
using namespace std;
#define ll long long

int n;
vector <pair <int, int> > es, g[90001];
ll light;

int find(int root){
    vector <bool> vis(n);
    queue <int> ready;
    vector <int> depth(n);
    ready.push(root);
    vector <int> edges;
    while(ready.size()){
        int node = ready.front();
        vis[node] = 1;
        ready.pop();
        for(auto &i : g[node]){
            if(vis[i.first]) continue;
            depth[i.first] = depth[node] + 1;
            edges.push_back(i.second);
            ready.push(i.first);
        }
    }
    reverse(edges.begin(), edges.end());
    int l = 0, r = n - 1;
    while(l <= r){
        int mid = (l + r) / 2;
        vector <int> check(n - 1);
        for(int i = 0 ; i <= mid ; i++){
            check[edges[i]] = 1;
        }
        if(ask(check) != light) r = mid - 1;
        else l = mid + 1;
    }
    auto edge = es[edges[l]];
    if(depth[edge.first] > depth[edge.second]) return edge.first;
    return edge.second;
}
void find_pair(int N, std::vector<int> u, std::vector<int> v, int a, int b) {
    n = N;
    for(int i = 0 ; i < n - 1 ; i++){
        g[u[i]].push_back(make_pair(v[i], i));
        g[v[i]].push_back(make_pair(u[i], i));
        es.push_back(make_pair(u[i], v[i]));
    }
    light = ask(vector <int>(n - 1, 0));
    int s = find(0);
    int t = find(s);
    answer(s, t);
}

Compilation message (stderr)

/tmp/cch2niQF.o: In function `ask(std::vector<int, std::allocator<int> > const&)':
grader.cpp:(.text+0x70): multiple definition of `ask(std::vector<int, std::allocator<int> > const&)'
/tmp/ccAFntbE.o:highway.cpp:(.text+0xa0): first defined here
/tmp/cch2niQF.o: In function `answer(int, int)':
grader.cpp:(.text+0x1e0): multiple definition of `answer(int, int)'
/tmp/ccAFntbE.o:highway.cpp:(.text+0x210): first defined here
/tmp/cch2niQF.o: In function `main':
grader.cpp:(.text.startup+0x0): multiple definition of `main'
/tmp/ccAFntbE.o:highway.cpp:(.text.startup+0x0): first defined here
collect2: error: ld returned 1 exit status