Submission #524916

#	Time	Username	Problem	Language	Result	Execution time	Memory
524916		lucri	Subway (info1cup19_subway)	C++17	100 / 100	10 ms	972 KiB

subway

#include <iostream>
using namespace std;
int k,n,link[6000010];
int main()
{
    link[0]=-1;
    cin>>k;
    n=1;
    for(int i=1;i<=k;++i)
    {
        ++n;
        k-=i;
        link[i]=i-1;
    }
    if(k)
        link[n++]=k-1;
    cout<<n<<'\n';
    for(int i=0;i<n;++i)
        cout<<i<<' '<<link[i]<<'\n';
    return 0;
}

• Subtask 1: 20 / 20
• Subtask 2: 30 / 30
• Subtask 3: 50 / 50