Submission #100762

#	Time	Username	Problem	Language	Result	Execution time	Memory
100762		dalgerok	Relativnost (COCI15_relativnost)	C++17	0 / 140	42 ms	33792 KiB

relativnost

#include<bits/stdc++.h>
using namespace std;


const int N = 1e5 + 5, M = 25, MOD = 1e4 + 7;




int n, m, q, a[N], b[N];

struct item{
    int dp[M];
    item(){
        memset(dp, 0, sizeof(dp));
    }
};
item t[4 * N];

inline item mrg(item a, item b){
    item c;
    for(int i = 0; i <= m; i++){
        for(int j = 0; j <= m; j++){
            c.dp[min(m, i + j)] += 1LL * a.dp[i] * b.dp[j] % MOD;
        }
    }
    for(int i = 0; i <= m; i++){
        c.dp[i] %= MOD;
    }
    return c;
}

void build(int v, int l, int r){
    if(l == r){
        t[v].dp[0] = a[l];
        t[v].dp[1] = b[l];
        return;
    }
    int mid = (r + l) >> 1;
    build(v + v, l, mid);
    build(v + v + 1, mid + 1, r);
    t[v] = mrg(t[v + v], t[v + v + 1]);
}
void update(int v, int l, int r, int pos){
    if(l == r){
        t[v].dp[0] = a[l];
        t[v].dp[1] = b[l];
        return;
    }
    int mid = (r + l) >> 1;
    if(pos <= mid){
        update(v + v, l, mid, pos);
    }
    else{
        update(v + v + 1, mid + 1, r, pos);
    }
    t[v] = mrg(t[v + v], t[v + v + 1]);
}

int main(){
    ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
    cin >> n >> m;
    for(int i = 1; i <= n; i++){
        cin >> a[i];
        a[i] %= MOD;
    }
    for(int i = 1; i <= n; i++){
        cin >> b[i];
        b[i] %= MOD;
    }
    build(1, 1, n);
    cin >> q;
    while(q--){
        int pos, x, y;
        cin >> pos >> x >> y;
        a[pos] = x;
        b[pos] = y;
        a[pos] %= MOD;
        b[pos] %= MOD;
        update(1, 1, n, pos);
        cout << t[1].dp[m] << "\n";
    }
}

• Subtask 1: 0 / 140