#/***********************************************************
#    rank1.c -- 順位づけ
#***********************************************************/

def rank1(i,  n,  a)  # a の順位 (学力テスト) 
    r = 1;  x = a[i]
    for k in 0...n
        if (a[k] > x); r += 1; end
    end
    return r
end

def rank2(i,  n,  a)  # a の順位 (統計学) 
    n_eq = 1;  n_lt = 0;  x = a[i]
    for k in 0...n
        if (a[k] < x); n_lt += 1
        elsif (a[k] == x); n_eq += 1; end
    end
    return n_lt + 0.5 * n_eq
end

N = 20
MAX = 100

    a = []

    for i in 0...N
        a[i] = ((MAX + 1.0) * rand).to_i
    end
    printf("    score rank1 rank2\n")
    for i in 0...N
        printf("%2d: %5d %5d %5.1f\n",
            i, a[i], rank1(i, N, a), rank2(i, N, a))
    end

exit 0