сумма на отрезке

#include <iostream>
#include <string>
#include <sstream>
using namespace std;

int main ()
{
  stringstream container;
  int n, k, j, q, v;
  cin >> n >> k;
  int arr[n];
  char f[k][3];
  for (int i=0; i<n; i++)
  {
    arr[i]=0;
  }

  for (int i=0; i<k; i++)
  for (int h=0; h<3; h++)
  cin >> f[i][h];

  for (int i=0; i<k; i++)
  {
    if (f[i][0]=='A')
    {
      container.clear();
      container << f[i][1];
      container >> j;
      container.clear();
      container << f[i][2];
      container >> v;
      arr[j-1]=v;
      v=0;
      j=0;
    }
    if (f[i][0]=='Q')
    {
       container.clear();
      container << f[i][1];
      container >> j;
      container.clear();
      container << f[i][2];
      container >> v;
      for (int i=j-1; i<=v-1; i++)
       q+=arr[i];
       cout << q << " ";
       q=0;
       v=0;
       j=0;
    }
  }
    cout << endl;
    for (int i=0; i<n; i++)
    cout << arr[i] << " ";
}