{"problem":{"name":"Two Switches","description":{"content":"Alice and Bob are controlling a robot. They each have one switch that controls the robot.   Alice started holding down her button $A$ second after the start-up of the robot, and released her button $B","description_type":"Markdown"},"platform":"AtCoder","limit":{"time_limit":2000,"memory_limit":262144},"difficulty":"None","is_remote":true,"is_sync":true,"sync_url":null,"sign":"abc070_b"},"statements":[{"statement_type":"Markdown","content":"Alice and Bob are controlling a robot. They each have one switch that controls the robot.  \nAlice started holding down her button $A$ second after the start-up of the robot, and released her button $B$ second after the start-up.  \nBob started holding down his button $C$ second after the start-up, and released his button $D$ second after the start-up.  \nFor how many seconds both Alice and Bob were holding down their buttons?\n\n## Constraints\n\n*   $0≤A<B≤100$\n*   $0≤C<D≤100$\n*   All input values are integers.\n\n## Input\n\nInput is given from Standard Input in the following format:\n\n$A$ $B$ $C$ $D$\n\n[samples]","is_translate":false,"language":"English"}],"meta":{"iden":"abc070_b","tags":[],"sample_group":[["0 75 25 100","50\n\nAlice started holding down her button $0$ second after the start-up of the robot, and released her button $75$ second after the start-up.  \nBob started holding down his button $25$ second after the start-up, and released his button $100$ second after the start-up.  \nTherefore, the time when both of them were holding down their buttons, is the $50$ seconds from $25$ seconds after the start-up to $75$ seconds after the start-up."],["0 33 66 99","0\n\nAlice and Bob were not holding their buttons at the same time, so the answer is zero seconds."],["10 90 20 80","60"]],"created_at":"2026-03-03 11:01:14"}}