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Ylhäältä alas -summa segmenttipuussa #7

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Laakeri opened this issue Feb 15, 2017 · 0 comments

Laakeri commented Feb 15, 2017 •

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int summa(int a, int b, int k, int x, int y) {
    if (b < x || a > y) return 0;
    if (a <= x && y <= b) return p[k];
    int d = (y+x)/2;
    return summa(a, b, 2*k, x, d) + summa(a, b, 2*k+1, d+1, y);
}

Oheinen koodi on parempi kuin luvun 28 alussa oleva.

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