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#include <bits/stdc++.h>
#include <stdint.h>

#include "palindromy.h"
#include "message.h"

using namespace std;


void slave() {
  int n = NumberOfNodes();
  int ii = MyNodeId();
  
  int s = n - 1;
  int l = GetLength();
  s = min(s, l);
  
  if(ii >= s) return;
  
  // int i0 =      l * ii       / s;
  // int i1 = -1 + l * (ii + 1) / s;
  
  // cerr << "ii = " << ii << ", i0 = " << i0 << ", i1 = " << i1 << '\n';
  
  int64_t ans = 0;
  for(int i = ii; i < l; i += s) {
    ans += 1;
    
    for(int j = 1; i-j >= 0 and i+j < l; j++) {
      if(GetLetter(i-j) == GetLetter(i+j)) {
        ans += 1;
      } else {
        break;
      }
    }
    
    for(int j = 1; i-j >= 0 and i+j-1 < l; j++) {
      if(GetLetter(i-j) == GetLetter(i+j-1)) {
        ans += 1;
      } else {
        break;
      }
    }
  }
  
  PutLL(n-1, ans);
  Send(n-1);
}


void master() {
  int n = NumberOfNodes();
  int s = n - 1;
  int l = GetLength();
  s = min(s, l);
  
  int64_t ans = 0;
  
  for(int i = 0; i < s; i++) {
    Receive(i);
    ans += GetLL(i);
  }
  
  cout << ans << '\n';
}


int main() {
  ios_base::sync_with_stdio(false);
  cin.tie(NULL);
  
  int n = NumberOfNodes();
  
  if(MyNodeId() != n-1) {
    slave();
  } else {
    master();
  }
  
  return 0;
}