Submission #624585

#	Time	Username	Problem	Language	Result	Execution time	Memory
624585		moyindavid	Parachute rings (IOI12_rings)	C++17	Compilation error	0 ms	0 KiB

rings

#include <bits/stdc++.h>
int N;
vector<int> v[2000];
int sz[2000]{0};

void Init(int N_) {

  N = N_;

}

void Link(int A, int B) {
    v[A].push_back(B);
    v[B].push_back(A);
    //sz[A]++;sz[B]++;
}

int CountCritical() {
    int ans=0;
    for(int i=0;i<N;i++){
        /*cnt=0;
        if(sz[i]>2)cnt++;
        for(auto u: v[i]){
            if(sz[u]==3)cnt++;
        }
        if(cnt==rem)ans++;*/
        for(int j=0;j<N;j++){
            if(j==i)continue;

            queue<int> q;q.push(j);
            bool vis[N]{0}, flag=0;

            while(!q.empty()){
                int a=q.front();q.pop();
                int cnt=0;
                for(auto u: v[a]){
                    if(u==i)continue;
                    if(vis[u]==1)cnt++;
                    if(cnt>1 || v[a].size()>3){
                        flag=true;
                        break;
                    }
                }
                if(flag)break;
            }
            if(flag){
                ans--;
                break;
            }

        }
        ans++;
    }

    return ans;

}

Compilation message (stderr)

rings.cpp:3:1: error: 'vector' does not name a type
    3 | vector<int> v[2000];
      | ^~~~~~
rings.cpp: In function 'void Link(int, int)':
rings.cpp:13:5: error: 'v' was not declared in this scope
   13 |     v[A].push_back(B);
      |     ^
rings.cpp: In function 'int CountCritical()':
rings.cpp:30:13: error: 'queue' was not declared in this scope; did you mean 'std::queue'?
   30 |             queue<int> q;q.push(j);
      |             ^~~~~
      |             std::queue
In file included from /usr/include/c++/10/queue:64,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:86,
                 from rings.cpp:1:
/usr/include/c++/10/bits/stl_queue.h:96:11: note: 'std::queue' declared here
   96 |     class queue
      |           ^~~~~
rings.cpp:30:19: error: expected primary-expression before 'int'
   30 |             queue<int> q;q.push(j);
      |                   ^~~
rings.cpp:30:26: error: 'q' was not declared in this scope
   30 |             queue<int> q;q.push(j);
      |                          ^
rings.cpp:36:29: error: 'v' was not declared in this scope
   36 |                 for(auto u: v[a]){
      |                             ^