Envío 6324

Código

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

int main() {
  int n; cin>>n;
  int arr[n];
  int i = 1, leftSum, rightSum;
  bool rightOk = false, leftOk = false;
  for(int i = 0; i < n; i++) {
    cin>>arr[i];
  }
  while(i < n && (!rightOk || !leftOk)) {
    leftSum = 0;
    rightSum = 0;
    for(int j = 0; j < i; j++) {
      leftSum += arr[j];
    }
    for(int j = i; j < n; j++) {
      rightSum += arr[j];
    }
    leftOk = leftSum > 0;
    rightOk = rightSum < 0;
    i++;
  }

  if(rightOk && leftOk) {
    cout<<i-1<<endl;
  } else {
    cout<<"Impossible"<<endl;
  }
  return 0;
}