Problem p02748 (C++)

Buggy submission (status: Runtime Error):
// #include <tourist>
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef pair<ll, ll> p;
const int INF = 1e9;
const ll LINF = ll(1e18) + 1;
const int MOD = 1000000007;
const int dx[4] = {0, 1, 0, -1}, dy[4] = {-1, 0, 1, 0};
const int Dx[8] = {0, 1, 1, 1, 0, -1, -1, -1},
          Dy[8] = {-1, -1, 0, 1, 1, 1, 0, -1};
#define yes cout << "Yes" << endl
#define YES cout << "YES" << endl
#define no cout << "No" << endl
#define NO cout << "NO" << endl
#define rep(i, n) for (int i = 0; i < n; i++)
#define ALL(v) v.begin(), v.end()
#define debug(v)                                                               \
  cout << #v << ":";                                                           \
  for (auto x : v) {                                                           \
    cout << x << ' ';                                                          \
  }                                                                            \
  cout << endl;
template <class T> bool chmax(T &a, const T &b) {
  if (a < b) {
    a = b;
    return 1;
  }
  return 0;
}
template <class T> bool chmin(T &a, const T &b) {
  if (b < a) {
    a = b;
    return 1;
  }
  return 0;
}
// cout<<fixed<<setprecision(15);有効数字15桁
//-std=c++14
ll gcd(ll a, ll b) { return b ? gcd(b, a % b) : a; }
ll lcm(ll a, ll b) { return a / gcd(a, b) * b; }
int A, B, m;
vector<int> a, b;
int main() {
  cin.tie(0);
  ios::sync_with_stdio(false);
  cin >> A >> B >> m;
  for (int i = 0; i < A; i++) {
    int temp;
    cin >> temp;
    a.push_back(temp);
  }
  for (int i = 0; i < B; i++) {
    int temp;
    cin >> temp;
    b.push_back(temp);
  }
  vector<ll> ans;
  rep(i, m) {
    int temp, temp1, cost;
    cin >> temp >> temp1 >> cost;
    temp--;
    temp1--;
    ans.push_back(a[temp] + b[temp] - cost);
  }
  sort(ALL(a));
  sort(ALL(b));
  ans.push_back(a[0] + b[0]);
  sort(ALL(ans));
  cout << ans[0] << "\n";
}


Fixed submission:
// #include <tourist>
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef pair<ll, ll> p;
const int INF = 1e9;
const ll LINF = ll(1e18) + 1;
const int MOD = 1000000007;
const int dx[4] = {0, 1, 0, -1}, dy[4] = {-1, 0, 1, 0};
const int Dx[8] = {0, 1, 1, 1, 0, -1, -1, -1},
          Dy[8] = {-1, -1, 0, 1, 1, 1, 0, -1};
#define yes cout << "Yes" << endl
#define YES cout << "YES" << endl
#define no cout << "No" << endl
#define NO cout << "NO" << endl
#define rep(i, n) for (int i = 0; i < n; i++)
#define ALL(v) v.begin(), v.end()
#define debug(v)                                                               \
  cout << #v << ":";                                                           \
  for (auto x : v) {                                                           \
    cout << x << ' ';                                                          \
  }                                                                            \
  cout << endl;
template <class T> bool chmax(T &a, const T &b) {
  if (a < b) {
    a = b;
    return 1;
  }
  return 0;
}
template <class T> bool chmin(T &a, const T &b) {
  if (b < a) {
    a = b;
    return 1;
  }
  return 0;
}
// cout<<fixed<<setprecision(15);有効数字15桁
//-std=c++14
ll gcd(ll a, ll b) { return b ? gcd(b, a % b) : a; }
ll lcm(ll a, ll b) { return a / gcd(a, b) * b; }
int A, B, m;
vector<int> a, b;
int main() {
  cin.tie(0);
  ios::sync_with_stdio(false);
  cin >> A >> B >> m;
  for (int i = 0; i < A; i++) {
    int temp;
    cin >> temp;
    a.push_back(temp);
  }
  for (int i = 0; i < B; i++) {
    int temp;
    cin >> temp;
    b.push_back(temp);
  }
  vector<ll> ans;
  rep(i, m) {
    int temp, temp1, cost;
    cin >> temp >> temp1 >> cost;
    temp--;
    temp1--;
    ans.push_back(a[temp] + b[temp1] - cost);
  }
  sort(ALL(a));
  sort(ALL(b));
  ans.push_back(a[0] + b[0]);
  sort(ALL(ans));
  cout << ans[0] << "\n";
}