Submission #136803

#	Time	Username	Problem	Language	Result	Execution time	Memory
136803		Minnakhmetov	Fibonacci representations (CEOI18_fib)	C++14	0 / 100	4 ms	508 KiB

fib

#include<bits/stdc++.h>
using namespace std;
 
#define ll long long
#define all(aaa) aaa.begin(), aaa.end()

const int N = 1005, MOD = 1e9 + 7;
int dp[N][3][3], a[N];

int calc()  {
    memset(dp, 0, sizeof(dp));
    a[2] += a[1] / 2;
    a[1] %= 2;

    for (int i = 1; i < N - 1; i++) {
        int x = min(a[i], a[i - 1]);
        a[i] -= x;
        a[i - 1] -= x;
        a[i + 1] += x;
    }

    

    dp[N - 1][0][0] = 1;
    for (int i = N - 1; i > 0; i--) {
        for (int x = 0; x < 3; x++) {
            for (int y = 0; y < 3; y++) {
                if (a[i] + y > 2)
                    break;
                for (int k = 0; k <= a[i] + y; k++) {
                    if (a[i] + y - k < 2 && x + k < 3) {
                        dp[i - 1][k][x + k] = (dp[i - 1][k][x + k] + dp[i][x][y]) % MOD;
                    }
                }
            }
        }
    }
    return dp[0][0][0];

    return 0;
}

signed main() {
#ifdef HOME
    freopen("input.txt", "r", stdin);
    freopen("output.txt", "w", stdout);
#endif
    ios_base::sync_with_stdio(0);
    cin.tie(0);
 
    int n;
    cin >> n;

    for (int i = 0; i < n; i++)  {
        int x;
        cin >> x;
        a[x]++;
        cout << calc() << "\n";
    }


   
 
    return 0;
}

• Subtask 1: 0 / 5
• Subtask 2: 0 / 20
• Subtask 3: 0 / 15
• Subtask 4: 0 / 10
• Subtask 5: 0 / 15
• Subtask 6: 0 / 35