Submission #690906

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
690906	2023-01-30 15:53:23	MateiKing80	Subway (info1cup19_subway)	C++17	100 / 100	7 ms	724 KiB

subway

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#include <bits/stdc++.h>
using namespace std;
int main()
{
    int k,i=1;
    cin>>k;
    while(i*(i+1)/2<=k)
        i++;
    i--;
    if(i*(i+1)/2==k)
    {
        cout<<i+1<<'\n';
    cout<<0<<" "<<-1<<'\n';
        for(int j=1;j<=i;j++)
            cout<<j<<" "<<j-1<<'\n';
    }
    else
    {
        cout<<i+2<<'\n';
    cout<<0<<" "<<-1<<'\n';
        for(int j=1;j<=i;j++)
            cout<<j<<" "<<j-1<<'\n';
        cout<<i+1<<" "<<k-(i*(i+1)/2)-1;
    }
}
 
 
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• Subtask 1: 20 / 20
• Subtask 2: 30 / 30
• Subtask 3: 50 / 50