Submission #735549

#	Time	Username	Problem	Language	Result	Execution time	Memory
735549		tigar	Bosses (BOI16_bosses)	C++14	0 / 100	1 ms	468 KiB

bosses

#include <bits/stdc++.h>

using namespace std;

int n;
vector<int>graff[5050], tree[5050];
pair<int, int>d[5050];
bool check[5050], ch[5050];
int val[5050];
vector<pair<int, int> >ord;
int reezz=0;

void bfs(int v, int br)
{
    if(check[v])return;
    check[v]=true;
    if(br!=0)tree[ord[br-1].second].push_back(v);
    for(int i=0; i<graff[v].size(); i++)
    {
        if(!check[graff[v][i]]){ord.push_back({graff[v][i], v}); /*tree[v].push_back(graff[v][i]);*/}
    }
    if(br==ord.size())return;

    bfs(ord[br].first, br+1);
}

int dfs(int v)
{
    if(ch[v])return 0;
    ch[v]=true;
    int ans=1;
    for(int i=0; i<tree[v].size(); i++)
    {
        ans+=dfs(tree[v][i]);
    }
    reezz+=ans;
    return ans;
}

int main()
{
    ios_base::sync_with_stdio(false);
    //cin.tie(0); cout.tie(0);

    cin>>n;
    for(int i=1; i<=n; i++)
    {
        int k; cin>>k;
        d[i].second=i;
        for(int j=0; j<k; j++)
        {
            int a; cin>>a;
            graff[a].push_back(i);
            d[a].first++;
        }
    }
    sort(d+1, d+n+1);
    bfs(d[n].second, 0);
    //for(int i=1; i<=n; i++){for(int j=0; j<tree[i].size(); j++)cout<<tree[i][j]<<" "; cout<<endl;}
    int k=dfs(d[n].second);
    cout<<reezz;
    return 0;
}
/*4
1 2
1 1
1 1
1 1
9*/

Compilation message (stderr)

bosses.cpp: In function 'void bfs(int, int)':
bosses.cpp:18:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   18 |     for(int i=0; i<graff[v].size(); i++)
      |                  ~^~~~~~~~~~~~~~~~
bosses.cpp:22:10: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   22 |     if(br==ord.size())return;
      |        ~~^~~~~~~~~~~~
bosses.cpp: In function 'int dfs(int)':
bosses.cpp:32:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   32 |     for(int i=0; i<tree[v].size(); i++)
      |                  ~^~~~~~~~~~~~~~~
bosses.cpp: In function 'int main()':
bosses.cpp:60:9: warning: unused variable 'k' [-Wunused-variable]
   60 |     int k=dfs(d[n].second);
      |         ^

• Subtask 1: 0 / 22
• Subtask 2: 0 / 45
• Subtask 3: 0 / 33