摘要：
A -Expanding RodsTime Limit:1000MSMemory Limit:30000KB64bit IO Format:%I64d & %I64uSubmitStatusDescriptionWhen a thin rod of length L is heated n degrees, it expands to a new length L'=(1+n*C)*L, where C is the coefficient of heat expansion.When a thin rod is mounted on two solid walls and t 阅读全文