Submission #491849

#	Time	Username	Problem	Language	Result	Execution time	Memory
491849		Alexandruabcde	삶의 질 (IOI10_quality)	C++14	0 / 100	1 ms	424 KiB

quality

#include "quality.h"
#include <bits/stdc++.h>
#define ub(x) (x&(-x))

using namespace std;

constexpr int VALMAX = 9000000;

int aib[VALMAX+5];

void Update (int pos, int val) {
    for (int i = pos; i <= VALMAX; i += ub(i))
        aib[i] += val;
}

int Query (int pos) {
    int S = 0;

    for (; pos; pos -= ub(pos))
        S += aib[pos];

    return S;
}

int rectangle(int R, int C, int H, int W, int Q[3001][3001]) {
	for (int i = 0; i < H; ++ i )
        for (int j = 0; j < W-1; ++ j )
            Update(Q[i][j], 1);

    int Min = R * C;

    for (int i = 0; i < R - H + 1; ++ i ) {
        if (i % 2 == 0) {
            for (int j = W-1; j < C; ++ j ) {
                for (int aux = i; aux < i + H; ++ aux )
                    Update(Q[aux][j], 1);

                int st = 1, dr = R * C;
                int ans = 0;

                while (st <= dr) {
                    int mij = (st + dr) / 2;
                    int val = Query(mij-1);

                    if (val <= H * W / 2) {
                        st = mij + 1;
                        ans = mij;
                    }
                    else dr = mij - 1;
                }

                Min = min(Min, ans);
                for (int aux = i; aux < i + H; ++ aux )
                    Update(Q[aux][j-W+1], -1);
            }

            if (i != R - H) {
                for (int j = C - W + 1; j < C; ++ j ) {
                    Update(Q[i + H][j], 1);
                    Update(Q[i][j], -1);
                }
            }
        }
        else {
            for (int j = C-W; j >= 0; -- j ) {
                for (int aux = i; aux < i + H; ++ aux )
                    Update(Q[aux][j], 1);

                int st = 1, dr = R * C;
                int ans = 0;

                while (st <= dr) {
                    int mij = (st + dr) / 2;
                    int val = Query(mij-1);

                    if (val <= H * W / 2) {
                        st = mij + 1;
                        ans = mij;
                    }
                    else dr = mij - 1;
                }

                Min = min(Min, ans);
                for (int aux = i; aux < i + H; ++ aux )
                    Update(Q[aux][j+W-1], -1);
            }

            if (i != R - H) {
                for (int j = 0; j < C-1; ++ j ) {
                    Update(Q[i+H][j], 1);
                    Update(Q[i][j], -1);
                }
            }
        }
    }

    return Min;
}

• Subtask 1: 0 / 20
• Subtask 2: 0 / 20
• Subtask 3: 0 / 20
• Subtask 4: 0 / 20
• Subtask 5: 0 / 20