Submission #1139440

#	Time	Username	Problem	Language	Result	Execution time	Memory
1139440		THXuan	Relativnost (COCI15_relativnost)	C++20	70 / 140	2252 ms	45300 KiB

relativnost

#include <iostream>
#include <vector>
#include <algorithm>
#include <queue>
#include <set>
#include <map>
#define INF 1e9
typedef long long ll;
using namespace std;

int n = 0, c = 0;
const ll MOD = 1e4 + 7;
ll dp[400005][21];

void build(int v, int l, int r, vector<ll>&a, vector<ll>&b) {
    if (l == r) {
        dp[v][0] = b[l] % MOD;
        dp[v][1] = a[l] % MOD;
        return;
    }
    int mid = (l + r) / 2;
    build(2 * v, l, mid, a, b);
    build(2 * v + 1, mid + 1, r,a, b);
    for (int i = 0; i <= c; i++)dp[v][i] = 0;
    for (int i = 0; i <= c; i++) {
        for (int j = 0; j <= c; j++) {
            dp[v][min(i + j, c)] = (dp[v][min(i + j, c)] + (dp[2 * v][i] * dp[2 * v + 1][j]) % MOD) % MOD;
        }
    }
}

void update(int v, int l, int r, int k, vector<ll>&a, vector<ll>&b) {
    if (l == r) {
        dp[v][0] = b[l] % MOD;
        dp[v][1] = a[l] % MOD;
        return;
    }
    int mid = (l + r) / 2;
    if (k <= mid) {
        update(2 * v, l, mid, k, a, b);
    }
    else {
        update(2 * v + 1, mid + 1, r, k, a, b);
    }
    for (int i = 0; i <= c; i++)dp[v][i] = 0;
    for (int i = 0; i <= c; i++) {
        for (int j = 0; j <= c; j++) {
            dp[v][min(i + j, c)] = (dp[v][min(i + j, c)] + (dp[2 * v][i] * dp[2 * v + 1][j]) % MOD) % MOD;
        }
    }
}

void solve()
{
    cin >> n >> c;
    vector<ll>a(n + 1), b(n + 1);
    for (int i = 1; i <= n; i++)cin >> a[i];
    for (int i = 1; i <= n; i++)cin >> b[i];
    build(1, 1, n, a, b);
    int q; cin >> q;
    while (q--) {
        ll p, A, B; cin >> p >> A >> B;
        a[p] = A; b[p] = B;
        update(1, 1, n, p, a, b);
        cout << dp[1][c] << "\n";
    }
}

int main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    int t = 1;// cin >> t;
    while (t--) solve();
    return 0;
}

• Subtask 1: 70 / 140