Submission #418559

#	Time	Username	Problem	Language	Result	Execution time	Memory
418559		fvogel499	Secret (JOI14_secret)	C++14	100 / 100	528 ms	8296 KiB

secret

/*
File created on 06/05/2021 at 15:10:35.
Link to problem: 
Description: 
Time complexity: O()
Space complexity: O()
Status: DEV
Copyright: Ⓒ 2021 Francois Vogel
*/

#include <iostream>
#include <cmath>
#include <vector>
#include <bitset>
#include <queue>
#include <cstring>
#include <set>
#include <unordered_set>
#include <map>
#include <unordered_map>
#include <algorithm>

using namespace std;

#define pii pair<int, int>
#define f first
#define s second

#define pb push_back
#define ins insert
#define cls clear

#define ll long long

const int siz = 1000;

int b [siz][siz];
int a [siz];
int n;

#include <secret.h>
// int Secret(int x, int y) {
//     return x+2*(y/2);
// }

void bs(int start, int end) {
    if (start > end) return;
    int mid = (start+end)/2;
    b[mid][mid] = a[mid];
    for (int i = mid-1; i >= start; i--) {
        b[i][mid] = Secret(a[i], b[i+1][mid]);
    }
    if (start >= end) return;
    b[mid+1][mid+1] = a[mid+1];
    for (int i = mid+2; i <= end; i++) {
        b[mid+1][i] = Secret(b[mid+1][i-1], a[i]);
    }
    bs(start, mid-1);
    bs(mid+1, end);
}

void Init(int ln, int la []) {
    n = ln;
    for (int i = 0; i < n; i++) {
        a[i] = la[i];
    }
    for (int i = 0; i < n; i++) {
        for (int j = 0; j < n; j++) {
            b[i][j] = -1;
        }
    }
    bs(0, n-1);
}

int Query(int queryLeft, int queryRight) {
    if (queryLeft == queryRight) {
        return a[queryLeft];
    }
    int start = 0;
    int end = n-1;
    while (true) {
        int mid = (start+end)/2;
        if (queryLeft <= mid and mid < queryRight) {
            int res = Secret(b[queryLeft][mid], b[mid+1][queryRight]);
            return res;
        }
        else if (queryLeft <= mid and mid == queryRight) {
            int res = b[queryLeft][mid];
            return res;
        }
        if (queryRight <= mid) end = mid-1;
        else start = mid+1;
    }
}

// signed main() {
//     int ln = 10;
//     int la [ln] = {2, 5, 6, 7, 10, 5, 7, 10, 22, 100};
//     Init(ln, la);
//     for (int i = 0; i < ln; i++) {
//         for (int j = i+1; j < ln; j++) {
//             int res = a[i];
//             for (int k = i+1; k <= j; k++) res = Secret(res, a[k]);
//             // cout << "                                               RUNNING: " << i << " " << j << endl;
//             int ans = Query(i, j);
//             if (res != ans) {
//                 cout << "WA: " << i << " " << j << " ------> " << ans << " instead of " << res << endl;
//             }
//         }
//     }

//     int d = 0;
//     d++;
// }

• Subtask 1: 100 / 100