Submission #680969

#	Time	Username	Problem	Language	Result	Execution time	Memory
680969		Cross_Ratio	Treasure (different grader from official contest) (CEOI13_treasure2)	C++14	80 / 100	3 ms	1236 KiB

treasure

#include <bits/stdc++.h>
#include "treasure.h"
using namespace std;
int B[105][105][4];
map<array<int, 4>, int> M;
int q(int a, int b, int c, int d) {
    if(M.count({a, b, c, d})) return M[{a, b, c, d}];
    int v = countTreasure(a, b, c, d);
    M[{a, b, c, d}] = v;
    return v;
}
void r(int a, int b) {
    Report(a, b);
}
void findTreasure(int N) {
    if(N==1) {
        if(q(1, 1, 1, 1)) r(1, 1);
        return;
    }
    int d = N / 2;
    vector<array<int, 2>> ans;
    //1 ~ d, d+1 ~ N
    int i, j;
    for(i=d;i<=N;i++) {
        for(j=d;j<=N;j++) {
            B[i][j][0] = q(1, 1, i, j);
        }
    }
    for(i=d+1;i<=N;i++) {
        for(j=d+1;j<=N;j++) {
            int v = B[i][j][0] - B[i][j-1][0] - B[i-1][j][0] + B[i-1][j-1][0];
            if(v) ans.push_back({i, j});
        }
    }

    for(i=d;i<=N;i++) {
        for(j=1;j<=d+1;j++) {
            B[i][j][1] = q(1, j, i, N);
        }
    }
    for(i=d+1;i<=N;i++) {
        for(j=1;j<=d;j++) {
            int v = B[i][j][1] - B[i-1][j][1] - B[i][j+1][1] + B[i-1][j+1][1];
            if(v) ans.push_back({i, j});
        }
    }

    for(i=1;i<=d+1;i++) {
        for(j=1;j<=d+1;j++) {
            B[i][j][2] = q(i, j, N, N);
        }
    }
    for(i=1;i<=d;i++) {
        for(j=1;j<=d;j++) {
            int v = B[i][j][2] - B[i+1][j][2] - B[i][j+1][2] + B[i+1][j+1][2];
            if(v) ans.push_back({i, j});
        }
    }

    for(i=1;i<=d+1;i++) {
        for(j=d;j<=N;j++) {
            B[i][j][3] = q(i, 1, N, j);
        }
    }
    for(i=1;i<=d;i++) {
        for(j=d+1;j<=N;j++) {
            int v = B[i][j][3] - B[i+1][j][3] - B[i][j-1][3] + B[i+1][j-1][3];
            if(v) ans.push_back({i, j});
        }
    }
    for(auto it : ans) r(it[0], it[1]);
}

• Subtask 1: 80 / 100