Submission #1073563

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
1073563	2024-08-24 16:07:50	blushingecchigirl	Carnival Tickets (IOI20_tickets)	C++17	Compilation error	0 ms	0 KiB

tickets

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#include <bits/stdc++.h>
using namespace std;
#define pb push_back
struct dsu {
    vector<int> parent, rank;
    int size;
    dsu(int sz) {
        size = sz;
        rank.assign(size, 1);
        parent.resize(size);
        for(int i = 0; i<size; i++) parent[i] = i;
    }
    int search(int v) {
        if(v == parent[v]) return v;
        return parent[v] = search(parent[v]);
    }
    void connect(int v, int u) {
        v = search(v);
        u = search(u);
        if(v == u) return;
        if(rank[v]>=rank[u]) parent[u] = v;
        else parent[v] = u;
        if(rank[v] == rank[u]) rank[v]++;
        return;
    }
};
void build(std::vector<std::vector<int>> b);
 
 
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Compilation message (stderr)

tickets.cpp: In function 'int construct(std::vector<std::vector<int> >)':
tickets.cpp:63:33: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   63 |                 for(int j = 1; j<tree[ii].size(); j++) b[tree[ii][j]][tree[ii][j-1]] = b[tree[ii][j-1]][tree[ii][j]] = 1;
      |                                ~^~~~~~~~~~~~~~~~
/usr/bin/ld: /tmp/cct6UwLh.o: in function `construct(std::vector<std::vector<int, std::allocator<int> >, std::allocator<std::vector<int, std::allocator<int> > > >)':
tickets.cpp:(.text+0x866): undefined reference to `build(std::vector<std::vector<int, std::allocator<int> >, std::allocator<std::vector<int, std::allocator<int> > > >)'
/usr/bin/ld: /tmp/cca6J8Vk.o: in function `main':
grader.cpp:(.text.startup+0x3b2): undefined reference to `find_maximum(int, std::vector<std::vector<int, std::allocator<int> >, std::allocator<std::vector<int, std::allocator<int> > > >)'
collect2: error: ld returned 1 exit status