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67 lines
1.3 KiB
Python
67 lines
1.3 KiB
Python
def problem_p02548(input_data):
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import array
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import bisect
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import collections
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import copy
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import heapq
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import itertools
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import math
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import os
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import queue
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import sys
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# from scipy.sparse.csgraph import csgraph_from_dense, floyd_warshall
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# from decimal import Decimal
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# from collections import defaultdict, deque
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sys.setrecursionlimit(10000000)
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ii = lambda: int(sys.stdin.buffer.readline().rstrip())
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il = lambda: list(map(int, sys.stdin.buffer.readline().split()))
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fl = lambda: list(map(float, sys.stdin.buffer.readline().split()))
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iln = lambda n: [int(sys.stdin.buffer.readline().rstrip()) for _ in range(n)]
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iss = lambda: sys.stdin.buffer.readline().decode().rstrip()
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sl = lambda: list(map(str, sys.stdin.buffer.readline().decode().split()))
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isn = lambda n: [sys.stdin.buffer.readline().decode().rstrip() for _ in range(n)]
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lcm = lambda x, y: (x * y) // math.gcd(x, y)
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MOD = 10**9 + 7
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INF = float("inf")
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def main():
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if os.getenv("LOCAL"):
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sys.stdin = open("input.txt", "r")
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N = ii()
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ret = 0
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for a in range(1, N):
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b = N // a
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if N - (a * b) <= 0:
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ret += b - 1
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else:
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ret += b
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return ret
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if __name__ == "__main__":
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main()
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