
USACO 2024 US Open Contest, Gold
Problem 2. Grass Segments
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Bessie is planting some grass on the positive real line. She has N (2≤N≤2⋅105) different cultivars of grass, and will plant the ith cultivar on the interval [ℓi,ri] (0<ℓi<ri≤109).
In addition, cultivar i grows better when there is some cultivar j (j≠i) such that cultivar j and cultivar i overlap with length at least ki (0<ki≤ri−ℓi). Bessie wants to evaluate all of her cultivars. For each i, compute the number of j≠i such that j and i overlap with length at least ki.
INPUT FORMAT (input arrives from the terminal / stdin):
The first line contains N.The next N lines each contain three space-separated integers ℓi, ri, and ki.
OUTPUT FORMAT (print output to the terminal / stdout):
The answers for all cultivars on separate lines.SAMPLE INPUT:
2 3 6 3 4 7 2
SAMPLE OUTPUT:
0 1
The overlaps of the cultivars is [4,6], which has length 2, which is at least 2 but not at least 3.
SAMPLE INPUT:
4 3 6 1 2 5 1 4 10 1 1 4 1
SAMPLE OUTPUT:
3 3 2 2
SAMPLE INPUT:
5 8 10 2 4 9 2 3 7 4 5 7 1 2 7 1
SAMPLE OUTPUT:
0 3 1 3 3
SCORING:
- Input 4-5: N≤5000
- Inputs 6-11: k is the same for all intervals
- Inputs 12-20: No additional constraints.
In addition, for Inputs 5, 7, ..., 19, ri≤2N for all i.
Problem credits: Benjamin Qi