{"problem":{"name":"A x B + C","description":{"content":"Given is a positive integer $N$. How many tuples $(A,B,C)$ of positive integers satisfy $A \\times B + C = N$?","description_type":"Markdown"},"platform":"AtCoder","limit":{"time_limit":2000,"memory_limit":262144},"difficulty":"None","is_remote":true,"is_sync":true,"sync_url":null,"sign":"abc179_c"},"statements":[{"statement_type":"Markdown","content":"Given is a positive integer $N$. How many tuples $(A,B,C)$ of positive integers satisfy $A \\times B + C = N$?\n\n## Constraints\n\n*   $2 \\leq N \\leq 10^6$\n*   All values in input are integers.\n\n## Input\n\nInput is given from Standard Input in the following format:\n\n$N$\n\n[samples]","is_translate":false,"language":"English"}],"meta":{"iden":"abc179_c","tags":[],"sample_group":[["3","3\n\nThere are $3$ tuples of integers that satisfy $A \\times B + C = 3$: $(A, B, C) = (1, 1, 2), (1, 2, 1), (2, 1, 1)$."],["100","473"],["1000000","13969985"]],"created_at":"2026-03-03 11:01:14"}}