My code stop running with error 3221225477

#include <iostream>
#include <vector>
using namespace std;

long long seg[4*1000000];
vector<long long> vettore;
void update(int ind, int low, int high, int l,int differenza){
 if(high<l || low>l)return;
   seg[ind]+=differenza;
   int mid=(low+high)/2;
   update(2*ind+1,low,mid,l,differenza);
   update(2*ind+2,mid+1,high,l,differenza);//if i erase this function it runs
  }
 void build(int ind, int low, int high){
  if(low==high){
     seg[ind]=vettore[low];
     return;
  }
  int mid=(low+high)/2;
  build(2*ind+1,low,mid);
  build(2*ind+2,mid+1,high);
  seg[ind]=seg[2*ind+1]+seg[2*ind+2];
 }
 void init(vector<long long> a) {
 vettore.resize(a.size());
 for(int i=0;i<a.size();i++)vettore[i]=a[i];
  build(0,0,a.size()-1);
 }


long long query(int ind, int low, int high, int l, int r){
if(low>=l&&high<=r){
   return seg[ind];
}
if(high<l || low>r)return 0;
 int mid=(low+high)/2;
 long long left=query(2*ind+1,low,mid,l,r);
 long long right=query(2*ind+2,mid+1,high,l,r);
 return left+right;
 }


long long get_sum(int l, int r) {
r--;
return query(0,0,vettore.size()-1,l,r);
}
/*
void add(int l, int r, long long x) {
for(int i=l;i<r;i++)vettore[i]+=x;
}
*/
 void set_range(int l, int r, long long x) {
for(int i=l;i<r;i++){
   int differenza=x-vettore[i];
   update(0,0,vettore.size()-1,i,differenza);
  vettore[i]=x;
 }
 }
/*
long long get_min(int l, int r) {
long long min=vettore[l];
l++;
 for(int i=l;i<r;i++){
   if(vettore[i]<min)min=vettore[i];
 }
 return min;
 }

 int lower_bound(int l, int r, long long x) {
  for(int i=l;i<r;i++){
   if(vettore[i]<x)return i;
 }
 return -1;
 }
 */
 int main(){
  ios::sync_with_stdio(false);


int n, q;
cin >> n >> q;

vector<long long> a(n);
for (int i = 0; i < n; i++)
    cin >> a[i];
init(a);
for (int i = 0; i < q; i++) {
    int op, l, r;
    long long x;
    cin >> op;
cin >> l >> r;
    if (op == 2 or op == 3 or op == 5)
        cin >> x;
    if (op == 1) cout << get_sum(l, r) << "\n";
    if (op == 2) add(l, r, x);
    if (op == 3) set_range(l, r, x);
    if (op == 4) cout << get_min(l, r) << "\n";
    if (op == 5) cout << lower_bound(l, r, x) << "\n";
}

return 0;
}