Cod sursa(job #1524269)

Utilizator bciobanuBogdan Ciobanu bciobanu Data 13 noiembrie 2015 19:10:37
Problema Order Scor 100
Compilator cpp Status done
Runda Arhiva de probleme Marime 1.06 kb
#include <cstdio>

const int MAX_N = 30000;

int fen[MAX_N + 1];
int n;

void fenAdd(int indx, int key) {
    for (; indx <= n; indx += (indx & -indx)) {
        fen[indx] += key;
    }
}

int binSearch(int X, int stepSize) {
    int pos = 0;
    for (int step = stepSize; step; step >>= 1) {
        if (pos + step <= n && fen[pos + step] < X) {
            X -= fen[pos + step];
            pos += step;
        }
    }
    return pos + 1;
}

int main(void) {
    freopen("order.in", "r", stdin);
    freopen("order.out", "w", stdout);
    scanf("%d", &n);
    fclose(stdin);

    for (int i = 1; i <= n; i++) {
        fenAdd(i, 1);
    }
    int pos = 2, stepSize = n;
    while (stepSize & (stepSize - 1)) {
        stepSize -= (stepSize & -stepSize);
    }
    for (int i = 0; i < n; i++) {
        pos += i;
        pos -= pos / (n - i) * (n - i);
        pos += ((n - i) & -(pos == 0));
        int key = binSearch(pos, stepSize);
        printf("%d ", key);
        fenAdd(key, -1);
    }
    fclose(stdout);
    return 0;
}