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3132:Taunt Exposure Estimation

题目描述
The brave knights of Camelot are constantly exposed to French taunting while assaulting the castle occupied by the French. Consequently, the taunting to which they are exposed varies with their distance from the castle during their assault, as well as variations in French taunting activity. We need to estimate the total amount of taunting that they are exposed to during a certain time period. Unfortunately, we only have access to a set of measurements at random times — we do not have a continuous reading — and, because of flaws in our archaic equipment, the measurements of taunting occur at unpredictable intervals.

The total amount of taunting will be given by the integral of the taunting intensity during the time period, as held in the observation data file. The amount of random noise, though, is fairly high, so that a simple trapezoid-rule integration is all that is merited.


输入解释
  • A single number, n, specifying the number of data points in the file

  • n pairs of floating point numbers (given in increasing x order), separated by a comma — in other words, a CSV file that could be input for a spreadsheet program [the first number is the x coordinate (time specification), the second is the y coordinate (the radiation reading)]
  • 输出解释
    A single line of text giving the first and last x values (with two digits to the right of the decimal point), and the computed integral (with four digits to the right of the decimal point), in the fashion shown below (which reflects the data shown in the graph):

    0.00 to 365.25: 2099.8021

    [A reasonable value for the given input, (shown in the graph above), since the values range around 5 3/4, and 365.25 * 5.75 gives 2100.1875.]
    输入样例
    9
    0.0000, 0.5176
    0.9869, 1.000
    1.596, 1.114
    2.370, 1.006
    2.904, 0.8481
    3.506, 0.5760
    3.996, 0.4775
    5.004, 0.3945
    6.283, 1.004
    输出样例
    0.00 to 6.28: 4.7288
    来自杭电HDUOJ的附加信息
    Recommend chenrui

    该题目是Virtual Judge题目,来自 杭电HDUOJ

    源链接: HDU-3132

    最后修改于 2020-10-25T23:00:22+00:00 由爬虫自动更新

    共提交 0

    通过率 --%
    时间上限 内存上限
    2000/1000MS(Java/Others) 32768/32768K(Java/Others)