Submission #902612

#	Time	Username	Problem	Language	Result	Execution time	Memory
902612		simona1230	Inside information (BOI21_servers)	C++17	5 / 100	1724 ms	63920 KiB

servers

#include <bits/stdc++.h>

using namespace std;

int n,k;
int in[4001][4001];

void slow()
{
    for(int i=1;i<=n;i++)
        in[i][i]=1;
    for(int i=1;i<=n+k-1;i++)
    {
        char c;
        cin>>c;
        int x,y;
        if(c=='S')
        {
            cin>>x>>y;
            for(int j=1;j<=n;j++)
            {
                in[x][j]=in[y][j]=max(in[x][j],in[y][j]);
            }
        }
        if(c=='C')
        {
            cin>>x;
            int cnt=0;
            for(int j=1;j<=n;j++)
                cnt+=in[j][x];
            cout<<cnt<<endl;
        }
        if(c=='Q')
        {
            cin>>x>>y;
            if(in[x][y])cout<<"yes"<<endl;
            else cout<<"no"<<endl;
        }
    }
}


int t[120001];
void subt2()
{
    t[1]=1;
    int sec=1;
    for(int i=1;i<=n+k-1;i++)
    {
        char c;
        cin>>c;

        if(c=='S')
        {
            int x,y;
            cin>>x>>y;

            t[max(x,y)]=sec++;
        }

        if(c=='Q')
        {
            int x,y;
            cin>>x>>y;

            if(t[y]&&t[y]<t[x])cout<<"yes"<<endl;
            else cout<<"no"<<endl;
        }

        if(c=='C')
        {
            int x;
            cin>>x;

            if(t[x]==0)cout<<1<<endl;
            else cout<<sec-t[x]<<endl;
        }
    }
}

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

	cin>>n>>k;
	if(n<=4000)slow();
    else subt2();

	return 0;
}

• Subtask 1: 2.5 / 2.5
• Subtask 2: 2.5 / 2.5
• Subtask 3: 0 / 2.5
• Subtask 4: 0 / 2.5
• Subtask 5: 0 / 5
• Subtask 6: 0 / 5
• Subtask 7: 0 / 10
• Subtask 8: 0 / 10
• Subtask 9: 0 / 12.5
• Subtask 10: 0 / 12.5
• Subtask 11: 0 / 17.5
• Subtask 12: 0 / 17.5