{"raw_statement":[{"iden":"problem statement","content":"Given is a positive integer $N$. How many tuples $(A,B,C)$ of positive integers satisfy $A \\times B + C = N$?"},{"iden":"constraints","content":"*   $2 \\leq N \\leq 10^6$\n*   All values in input are integers."},{"iden":"input","content":"Input is given from Standard Input in the following format:\n\n$N$"},{"iden":"sample input 1","content":"3"},{"iden":"sample output 1","content":"3\n\nThere are $3$ tuples of integers that satisfy $A \\times B + C = 3$: $(A, B, C) = (1, 1, 2), (1, 2, 1), (2, 1, 1)$."},{"iden":"sample input 2","content":"100"},{"iden":"sample output 2","content":"473"},{"iden":"sample input 3","content":"1000000"},{"iden":"sample output 3","content":"13969985"}],"translated_statement":null,"sample_group":[],"show_order":["default"],"formal_statement":null,"simple_statement":null,"has_page_source":true}