Submission #943687

#	Time	Username	Problem	Language	Result	Execution time	Memory
943687		yeediot	Two Transportations (JOI19_transportations)	C++17	Compilation error	0 ms	0 KiB

Azer

#include "Azer.h"
#include<bits/stdc++.h>
using namespace std;
#define S second
#define F first
#define int long long
namespace {
    const int mxn=5e5+5;
    int cur=0,bit=0,n=0,cnt=0,prev=0,first=0;
    vector<pair<int,int>>adj[mxn];
    vector<int>dis;
    vector<bool>vis;
    pair<int,int>mn={(1<<9)-1,(1<<9)-1};
    void send(int a,int b){
        b--;
        for(;b>=0;b--){
            SendA(a>>b&1);
        }
    }
    void gmn(){
        dis[mn.S]=prev+mn.F;
        prev=dis[mn.S];
        cnt--;
        vis[mn.S]=1;
        for(auto [u,d]:adj[mn.S]){
            dis[u]=min(dis[u],dis[mn.S]+d);
        }
        mn={(1<<9)-1,(1<<9)-1};
        for(int i=0;i<n;i++){
            if(vis[i])continue;
            mn=min(mn,{dis[i]-prev,i});
        }
        if(cnt)send(mn.F,9);
    }
    void gdis(){
        if(cur==(1<<9)-1){
            send(mn.S,11);
            gmn();
        }
        else{
            mn.F=cur;
            first=0;
        }
        cur=bit=0;
    }
    void gid(){
        mn.S=cur;
        gmn();
        cur=bit=0;
        first=1;
    }
}  // namespace
void InitA(int N, int A, std::vector<int> U, std::vector<int> V,std::vector<int> C) {
    for(int i=0;i<A;i++){
        adj[V[i]].push_back({U[i],C[i]});
        adj[U[i]].push_back({V[i],C[i]});
    }
    n=N;
    cnt=n;
    first=1;
    bit=0;
    cur=0;
    prev=0;
    dis=vector<int>(N,1e9);
    vis=vector<bool>(N,0);
    dis[0]=0;
    vis[0]=1;
    cnt--;
    int v=0;
    for(auto [u,d]:adj[v]){
        dis[u]=min(dis[u],dis[v]+d);
        mn=min(mn,{dis[u],u});
    }
    send(mn.F,9);
}

void ReceiveA(bool x) {
    cur=cur*2+x;
    bit++;
    if(bit==9 and first){
        gdis();
    }
    else if(bit==11){
        gid();
    }
}

std::vector<int> Answer() {
    return dis;
}

Baijan

Compilation message (stderr)

Azer.cpp: In function 'void InitA(long long int, long long int, std::vector<long long int>, std::vector<long long int>, std::vector<long long int>)':
Azer.cpp:63:5: error: reference to 'prev' is ambiguous
   63 |     prev=0;
      |     ^~~~
Azer.cpp:9:31: note: candidates are: 'long long int {anonymous}::prev'
    9 |     int cur=0,bit=0,n=0,cnt=0,prev=0,first=0;
      |                               ^~~~
In file included from /usr/include/c++/10/bits/stl_algobase.h:66,
                 from /usr/include/c++/10/vector:60,
                 from Azer.h:6,
                 from Azer.cpp:1:
/usr/include/c++/10/bits/stl_iterator_base_funcs.h:224:5: note:                 'template<class _BidirectionalIterator> constexpr _BidirectionalIterator std::prev(_BidirectionalIterator, typename std::iterator_traits<_Iter>::difference_type)'
  224 |     prev(_BidirectionalIterator __x, typename
      |     ^~~~
Azer.cpp: At global scope:
Azer.cpp:88:18: error: ambiguating new declaration of 'std::vector<long long int> Answer()'
   88 | std::vector<int> Answer() {
      |                  ^~~~~~
In file included from Azer.cpp:1:
Azer.h:11:18: note: old declaration 'std::vector<int> Answer()'
   11 | std::vector<int> Answer();
      |                  ^~~~~~

/usr/bin/ld: /tmp/ccA1bmaQ.o: in function `main':
grader_baijan.cpp:(.text.startup+0x174): undefined reference to `InitB(int, int, std::vector<int, std::allocator<int> >, std::vector<int, std::allocator<int> >, std::vector<int, std::allocator<int> >)'
/usr/bin/ld: grader_baijan.cpp:(.text.startup+0x202): undefined reference to `ReceiveB(bool)'
collect2: error: ld returned 1 exit status