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Submission #546702

# Submission time Handle Problem Language Result Execution time Memory
546702 2022-04-08T08:30:19 Z alexdumitru Subway (info1cup19_subway) C++14
100 / 100
 8 ms 724 KB 
#include <bits/stdc++.h>
using namespace std;
int k,n,i;
signed main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cin>>k;
    for(n=1;n*(n-1)/2<k;n++);
    if(n*(n-1)/2>k)
    {
        n--;
        cout<<n+1<<'\n';
        for(i=0;i<n;i++)
            cout<<i<<' '<<i-1<<'\n';
        cout<<n<<' '<<k-n*(n-1)/2-1<<'\n';
    }
    else {
        cout<<n<<'\n';
        for(i=0;i<n;i++)
            cout<<i<<' '<<i-1<<'\n';
    }
    return 0;
}

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 320 KB Output is correct
5 Correct 1 ms 212 KB Output is correct

Subtask #2
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 320 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 212 KB Output is correct

Subtask #3
50.0 / 50.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 320 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 3 ms 340 KB Output is correct
12 Correct 2 ms 340 KB Output is correct
13 Correct 2 ms 320 KB Output is correct
14 Correct 2 ms 340 KB Output is correct
15 Correct 2 ms 412 KB Output is correct
16 Correct 8 ms 724 KB Output is correct
17 Correct 1 ms 212 KB Output is correct
18 Correct 7 ms 724 KB Output is correct
19 Correct 5 ms 596 KB Output is correct
20 Correct 4 ms 576 KB Output is correct