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#include <bits/stdc++.h>
#include "message.h"
#include "palindromy.h"


#define FOR(i,a,b) for(int i=(a);i<(b);++i)
#define FORD(i, a, b) for(int i = (a); i >= (b); --i)
#define VAR(v, i) __typeof(i) v=(i)
#define FORE(i, c) for(VAR(i, (c).begin()); i != (c).end(); ++i)
#define all(v) (v).begin(),(v).end()
 
#define PII pair<int,int>
#define mp make_pair
#define st first
#define nd second
#define pb push_back
#define lint long long int
#define VI vector<int>
 
#define debug(x) {cerr <<#x <<" = " <<x <<endl; }
#define debug2(x,y) {cerr <<#x <<" = " <<x << ", "<<#y<<" = "<< y <<endl; } 
#define debug3(x,y,z) {cerr <<#x <<" = " <<x << ", "<<#y<<" = "<< y << ", " << #z << " = " << z <<endl; } 
#define debugv(x) {{cerr <<#x <<" = "; FORE(itt, (x)) cerr <<*itt <<", "; cerr <<endl; }}
#define debugt(t,n) {{cerr <<#t <<" = "; FOR(it,0,(n)) cerr <<t[it] <<", "; cerr <<endl; }}
 
#define make( x) int (x); scanf("%d",&(x));
#define make2( x, y) int (x), (y); scanf("%d%d",&(x),&(y));
#define make3(x, y, z) int (x), (y), (z); scanf("%d%d%d",&(x),&(y),&(z));
#define make4(x, y, z, t) int (x), (y), (z), (t); scanf("%d%d%d%d",&(x),&(y),&(z),&(t));
#define makev(v,n) VI (v); FOR(i,0,(n)) { make(a); (v).pb(a);} 
#define IOS ios_base::sync_with_stdio(0)
#define HEAP priority_queue
 
#define read( x) scanf("%d",&(x));
#define read2( x, y) scanf("%d%d",&(x),&(y));
#define read3(x, y, z) scanf("%d%d%d",&(x),&(y),&(z));
#define read4(x, y, z, t) scanf("%d%d%d%d",&(x),&(y),&(z),&(t));
#define readv(v,n) FOR(i,0,(n)) { make(a); (v).pb(a);}
 
 
using namespace std;

const int max_n = 30000005;

int id;
int nodes;
int N;

char w[max_n];
int p1[max_n];
int p2[max_n];

void manacher(const char *w, int n, int *p, int sh) {
	int g = 0;
	p[0] = 1-sh;
	for(int i=1;i<n;i++) {
		p[i] = 2*g-i>=0?max(min(p[2*g-i], p[g]+g-i),0):0;
		while(i>=p[i]+sh && i+p[i]<n && w[i+p[i]]==w[i-p[i]-sh]) p[g=i]++;
	}
}

void bruteforce1() {
	if (id == 0) {
		FOR(i,0,N) w[i] = GetLetter(i);
		w[N] = '\0';
		manacher(w, N, p1, 0);
		manacher(w, N, p2, 1);
		lint my_ans = 0;
		FOR(i,0,N) my_ans += p1[i] + p2[i];
		printf("%lld\n", my_ans);
	}
}

int main() {
	id = MyNodeId();
	nodes = NumberOfNodes();
	N = GetLength();
	if (N < 3e7) {
		bruteforce1();
	} else {
	int BLOCK_SIZE = (N+nodes-1)/nodes;	
	int B1 = id * BLOCK_SIZE;
	int B2 = min(N, (id+1)*BLOCK_SIZE);
	int pB1 = max( (id -1) * BLOCK_SIZE, 0);
	int pB2 = B1;
	int nB1 = B2;
	int nB2 = min(N, nB1 + BLOCK_SIZE);
	lint my_res = 0;
	
	
	FOR(i,pB1, nB2) w[i-pB1] = GetLetter(i);
	w[nB2-pB1] = '\0';
	manacher(w, nB2-pB1, p1, 0);
	manacher(w, nB2-pB1, p2, 1);
	FOR(i, B1, B2) {
		my_res += p1[i-pB1];
		if ( (p1[i-pB1] == i-pB1+1) || (p1[i-pB1]+i == nB2) ) {
			int j1 = i-p1[i-pB1];
			int j2 = i+p1[i-pB1];
			while (j1>=0 && j2<N && GetLetter(j1) == GetLetter(j2)) {
				my_res++;
				j1--; j2++;
			}
		}
	}
	FOR(i, B1, B2) {
		my_res += p2[i-pB1];
		if ( (p2[i-pB1] == i-pB1) || (p2[i-pB1]+i == nB2)) {
			int j1 = i-p2[i-pB1]-1;
			int j2 = i+p2[i-pB1];
			while (j1>=0 && j2<N && GetLetter(j1) == GetLetter(j2)) {
				my_res++;
				j1--; j2++;
			}
		}
	}
	

	if (id != 0) {
		PutLL(0, my_res);
		Send(0);
	} else {
		FOR(i,1,nodes) {
			int instancja = Receive(-1);
			my_res = my_res + GetLL(instancja);
		}
		printf("%lld\n", my_res);
	}
	
	
	}
}