Submission #68910

#	Time	Username	Problem	Language	Result	Execution time	Memory
68910		MANcity	Bosses (BOI16_bosses)	C++14	100 / 100	996 ms	1052 KiB

bosses

///GAGO_O
#include<iostream>
#include<cstdio>
#include<fstream>
#include<algorithm>
#include<cmath>
#include<map>
#include<queue>
#include<set>
#include<stack>
#include<string>
#include<cstring>
#include<vector>
using namespace std;
#define for1(i,n) for(int i=1;i<=(int)n;i++)
#define for0(i,n) for(int i=0;i<=(int)n;i++)
#define forn(i,n) for(int i=n;i>=1;i--)
#define fo(i,x,y) for(int i=x;i<=(int)y;i++)
#define fr(i,x,y) for(int i=x;i>=(int)y;i--)
#define pb push_back
#define mp make_pair
#define LL long long
const LL Mod=1000*1000*1000+7;
int n;
int used[5002];
vector<vector<int> > g(5002);
int d[5002];
int p[5002];
int bfs(int x)
{
    for1(i,n)
    {
        used[i]=0;
        d[i]=0;
        p[i]=0;
    }
    int X=x;
    queue<int> q;
    q.push(x);
    used[x]=1;
    p[x]=1;
    while(!q.empty())
    {
        int x=q.front();
        for0(j,g[x].size()-1)
        {
            int to=g[x][j];
            if(used[to]==0)
            {
                p[to]=p[x]+1;
                used[to]=1;
                q.push(to);
            }
        }
        q.pop();
    }
    for1(i,n)
        if(used[i]==0)
            return (100000000);
    for1(i,n)
        d[p[i]]++;
    int u=0;
    forn(i,n)
    {
        if(d[i]!=0)
        {
            u=i;
            break;
        }
    }
    int ANS=0;
    ANS+=d[u];
    forn(i,u-1)
        ANS+=(d[i]-1);
    int f[5002];
    for1(i,n)
        f[i]=0;
    f[u-1]=d[u]+1;
    forn(i,u-2)
    {
        f[i]=(f[i+1]+d[i+1]);
    }
    forn(i,u-1)
        ANS+=f[i];
    return ANS;
}
int main()
{
    scanf("%d",&n);
    for1(i,n)
    {
        int k;
        scanf("%d",&k);
        for1(j,k)
        {
            int x;
            scanf("%d",&x);
            g[x].push_back(i);
        }
    }
    int ans=100000000;
    for1(i,n)
        ans=min(ans,bfs(i));
    cout<<ans<<endl;
    return 0;
}

Compilation message (stderr)

bosses.cpp: In function 'int bfs(int)':
bosses.cpp:37:9: warning: unused variable 'X' [-Wunused-variable]
     int X=x;
         ^
bosses.cpp: In function 'int main()':
bosses.cpp:89:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d",&n);
     ~~~~~^~~~~~~~~
bosses.cpp:93:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d",&k);
         ~~~~~^~~~~~~~~
bosses.cpp:97:18: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
             scanf("%d",&x);
             ~~~~~^~~~~~~~~

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