{"problem":{"name":"Kagami Mochi","description":{"content":"An _$X$\\-layered kagami mochi_ $(X ≥ 1)$ is a pile of $X$ round mochi (rice cake) stacked vertically where each mochi (except the bottom one) has a smaller diameter than that of the mochi directly bel","description_type":"Markdown"},"platform":"AtCoder","limit":{"time_limit":2000,"memory_limit":262144},"difficulty":"None","is_remote":true,"is_sync":true,"sync_url":null,"sign":"abc085_b"},"statements":[{"statement_type":"Markdown","content":"An _$X$\\-layered kagami mochi_ $(X ≥ 1)$ is a pile of $X$ round mochi (rice cake) stacked vertically where each mochi (except the bottom one) has a smaller diameter than that of the mochi directly below it. For example, if you stack three mochi with diameters of $10$, $8$ and $6$ centimeters from bottom to top in this order, you have a $3$\\-layered kagami mochi; if you put just one mochi, you have a $1$\\-layered kagami mochi.\nLunlun the dachshund has $N$ round mochi, and the diameter of the $i$\\-th mochi is $d_i$ centimeters. When we make a kagami mochi using some or all of them, at most how many layers can our kagami mochi have?\n\n## Constraints\n\n*   $1 ≤ N ≤ 100$\n*   $1 ≤ d_i ≤ 100$\n*   All input values are integers.\n\n## Input\n\nInput is given from Standard Input in the following format:\n\n$N$\n$d_1$\n$:$\n$d_N$\n\n[samples]","is_translate":false,"language":"English"}],"meta":{"iden":"abc085_b","tags":[],"sample_group":[["4\n10\n8\n8\n6","3\n\nIf we stack the mochi with diameters of $10$, $8$ and $6$ centimeters from bottom to top in this order, we have a $3$\\-layered kagami mochi, which is the maximum number of layers."],["3\n15\n15\n15","1\n\nWhen all the mochi have the same diameter, we can only have a $1$\\-layered kagami mochi."],["7\n50\n30\n50\n100\n50\n80\n30","4"]],"created_at":"2026-03-03 11:01:14"}}