Submission #1156330

#	Time	Username	Problem	Language	Result	Execution time	Memory
1156330		The_Samurai	Mosaic (IOI24_mosaic)	C++20	0 / 100	89 ms	25416 KiB

mosaic

#include "mosaic.h"
#include "bits/stdc++.h"
using namespace std;
using ll = long long;

void maxs(int &x, int y) {
    x = max(x, y);
}

vector<long long> mosaic(vector<int> X, vector<int> Y, vector<int> T, 
                        vector<int> B, vector<int> L, vector<int> R) {

    int n = X.size();
    vector a(n, vector(min(n, 3), false));
    a[0] = vector(n, false);
    for (int i = 0; i < n; i++) {
        a[0][i] = X[i]; a[i][0] = Y[i];
    }
    for (int i = 1; i < n; i++) {
        if (i <= 2) a[i].resize(n);
        for (int j = 1; j < a[i].size(); j++) {
            a[i][j] = !(a[i - 1][j] | a[i][j - 1]);
            
        }
    }

    auto get = [&](int x, int y1, int y2) -> int {
        if ((x + y1) % 2) y1++;
        if ((x + y2) % 2) y2--;
        if (y1 > y2) return 0;
        return (y2 - y1) / 2 + 1;
    };

    vector<ll> ans(T.size());
    for (int i = 0; i < T.size(); i++) {
        auto [x1, x2] = make_pair(T[i], B[i]);
        auto [y1, y2] = make_pair(L[i], R[i]);
        maxs(x1, 1); maxs(y1, 1);
        // cout << x1 << ' ' << y1 << ' ' << x2 << ' ' << y2 << endl;
        if (x1 > x2 or y1 > y2) continue;
        int c = (x2 - x1 + 1);
        int now = get(x1, y1, y2) * ((c + 1) / 2);
        now += get(x1 + 1, y1, y2) * (c / 2);
        // for (int x = T[i]; x <= B[i]; x++) {
        //     for (int y = L[i]; y <= R[i]; y++) {
        //         if (min(x, y) <= 2) {
        //             now += a[x][y];
        //             continue;
        //         }
        //         int d = min(x, y) - 2;
        //         now += a[x - d][y - d];
        //     }
        // }
        ans[i] = now;
    }

    // for (int i = 0; i < n; i++) {
    //     for (int j = 0; j < a[i].size(); j++) cout << a[i][j] << ' ';
    //     cout << endl;
    // }
    return ans;

    // for (int i = 2; i < n - 1; i++) {
    //     for (int j = 2; j < n - 1; j++) {
    //         if (a[i][j] != a[i - 1][j - 1]) {
    //             cout << i << ' ' << j << endl;
    //         }
    //         // assert(a[i][j] == a[i - 1][j - 1]);
    //     }
    // }
    // return vector(T.size(), 0ll);
}

• Subtask 0: 0 / 0
• Subtask 1: 0 / 5
• Subtask 2: 0 / 7
• Subtask 3: 0 / 7
• Subtask 4: 0 / 10
• Subtask 5: 0 / 8
• Subtask 6: 0 / 22
• Subtask 7: 0 / 19
• Subtask 8: 0 / 22