Submission #1257544

#	Time	Username	Problem	Language	Result	Execution time	Memory
1257544		nerrrmin	Mosaic (IOI24_mosaic)	C++20	22 / 100	215 ms	204236 KiB

mosaic

#include "mosaic.h"
#define pb push_back
#include <vector>
#include<bits/stdc++.h>
using namespace std;
const int maxn = 5005;
int a[maxn][maxn], pref[maxn][maxn];
int n;
std::vector<long long> mosaic(std::vector<int> X, std::vector<int> Y,
                              std::vector<int> T, std::vector<int> B,
                              std::vector<int> L, std::vector<int> R)
{

    n = X.size();
    for (int i = 1; i <= n; ++ i)
        a[1][i] = X[i-1];
    for (int i = 1; i <= n; ++ i)
        a[i][1] = Y[i-1];
    for (int i = 2; i <= n; ++ i)
    {
        for (int j = 2; j <= n; ++ j)
        {
            if(!a[i-1][j] && !a[i][j-1])a[i][j] = 1;
            else a[i][j] = 0;
        }
    }

    /**for (int i = 1; i <= n; ++ i)
    {
        for (int j = 1; j <= n; ++ j)
            cout << a[i][j] << " ";
        cout << endl;
    }*/
    for (int i = 1; i <= n; ++ i)
        pref[1][i] = pref[1][i-1] + a[1][i];
    for (int i = 2; i <= n; ++ i)
        pref[i][1] = pref[i-1][1] + a[i][1];

    for (int i = 2; i <= n; ++ i)
    {
        for (int j = 2; j <= n; ++ j)
        {
            pref[i][j] = pref[i-1][j] + pref[i][j-1] + a[i][j] - pref[i-1][j-1];
        }
    }
    int q = (int)T.size();
    std::vector<long long> C(q, 0);
    for (int i = 0; i < q; ++ i)
    {
        int t = T[i] + 1;
        int b = B[i] + 1;
        int l = L[i] + 1;
        int r = R[i] + 1;
        long long ans = pref[b][r] - pref[t-1][r] - pref[b][l-1] + pref[t-1][l-1];
        C[i] = ans;
    }
    return C;
}
/**
4
1 0 1 0
1 1 0 1
2
0 3 0 3
2 3 0 2
*/

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