Submission #94867

#	Time	Username	Problem	Language	Result	Execution time	Memory
94867		rhdmstjr	Treasure (different grader from official contest) (CEOI13_treasure2)	C++11	90 / 100	2 ms	380 KiB

treasure

#include "treasure.h"

#include <vector>
using namespace std;

#define MAX_N       104

int pSum[MAX_N][MAX_N]; // [1, 100]

bool isTreasure(int r, int c) {
    return pSum[r][c] - pSum[r-1][c] - pSum[r][c-1] + pSum[r-1][c-1];
}

int n;

void initPSum() {
    // init pSum
    // 일단은 한 방향 + 최적화 없이
    pSum[n][n] = countTreasure(1, 1, n, n);
    int half_boundary = (n + 1) / 2;
    for(int i = 1; i <= n; i++) {
        if (half_boundary <= i ){
            pSum[i][n] = countTreasure(1, 1, i, n);
            pSum[n][i] = countTreasure(1, 1, n, i);
        }
        else {
            pSum[i][n] = pSum[n][n] - countTreasure(i + 1, 1, n, n);
            pSum[n][i] = pSum[n][n] - countTreasure(1, i + 1, n, n);
        }
    }

    for(int r = 1; r < n; r++) {
        for(int c = 1; c < n; c++) {
            if (r < half_boundary) {
                if (c < half_boundary) {
                    pSum[r][c] = countTreasure(r + 1, c + 1, n, n) + pSum[r][n] + pSum[n][c] - pSum[n][n];
                }
                else {
                    pSum[r][c] = pSum[n][c] - countTreasure(r + 1, 1, n, c);
                }
            } else {
                if (c < half_boundary) {
                    pSum[r][c] = pSum[r][n] - countTreasure(1, c + 1, r, n);
                }
                else{
                    pSum[r][c] = countTreasure(1, 1, r, c);
                }
            }
            
        }
    }
}

void findTreasure (int N) {
    n = N;
    
    initPSum();


    for(int r = 1; r <= N; r++) {
        for(int c = 1; c <= N; c++) {
            if (isTreasure(r, c)) {
                Report(r, c);
            }
        }
    }
}

• Subtask 1: 90 / 100