#include<bits/stdc++.h>
namespace {
#pragma GCC diagnostic ignored "-Wunused-function"
#include<atcoder/all>
#pragma GCC diagnostic warning "-Wunused-function"
using namespace std;
using namespace atcoder;
#define rep(i,n) for(int i = 0; i < (int)(n); i++)
#define rrep(i,n) for(int i = (int)(n) - 1; i >= 0; i--)
#define all(x) begin(x), end(x)
#define rall(x) rbegin(x), rend(x)
template<class T> bool chmax(T& a, const T& b) { if (a < b) { a = b; return true; } else return false; }
template<class T> bool chmin(T& a, const T& b) { if (b < a) { a = b; return true; } else return false; }
using ll = long long;
// using P = pair<int,int>;
using VI = vector<int>;
using VVI = vector<VI>;
using VL = vector<ll>;
using VVL = vector<VL>;
constexpr int INF = 1001001001;
constexpr int M = 200010;
constexpr int B = 3125;
int a[M], b[M];
int ans_memo[2 * M];
bool invalid[M];
int n;

void dfs(int l_ask, int r_ask, int l_a, int r_a) {
  if (l_ask == r_ask) return;
  int c_ask = (l_ask + r_ask) / 2;
  int mn = 2 * INF;
  int imn = max(l_a, c_ask - (n - 1));
  for (int ia = imn, iar = min({r_a, n, c_ask + 1}); ia < iar; ia++) {
    if (!invalid[ia] && chmin(mn, a[ia] + b[c_ask - ia])) imn = ia;
  }
  ans_memo[c_ask] = mn;
  dfs(l_ask, c_ask, l_a, imn + 1);
  dfs(c_ask + 1, r_ask, imn, r_a);
}

int P[M], X[M], K[M];

} int main() {
  ios::sync_with_stdio(false);
  cin.tie(0);
  int q;
  cin >> n >> q;
  rep(i, n) cin >> a[i];
  rep(i, n) cin >> b[i];
  rep(i, q) cin >> P[i] >> X[i] >> K[i], P[i]--, K[i] -= 2;
  int bl = 0, br = 0;
  rep(iq, q) {
    if (iq % B == 0) {
      bl = iq;
      br = min(iq + B, q);
      for (int i = bl; i < br; i++) invalid[P[i]] = true;
      dfs(0, 2 * n - 1, 0, n);
      for (int i = bl; i < br; i++) invalid[P[i]] = false;
    }
    a[P[iq]] = X[iq];
    int ans = ans_memo[K[iq]];
    for (int i = bl; i < br; i++) {
      int ia = P[i], ib = K[iq] - ia;
      if (0 <= ib && ib < n) chmin(ans, a[ia] + b[ib]);
    }
    cout << ans << '\n';
  }
}