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#include "message.h"
#include "poszukiwania.h"
#include <cstdio>
#include <vector>
#include <algorithm>
using namespace std;

#define LL long long
#define int128 LL//__int128

#define MOD1  2000000011LL
#define BASE1 1000000009LL
#define MOD2  2000000033LL
#define BASE2 1000000007LL
#define MOD3  2000000063LL
#define BASE3 1000000013LL

LL S,M;
int nodeId,numberOfNodes;

inline int128 pow(int128 a,int128 b,int128 m){
    int128 ret=1;
    while(b!=0){
        if(b&1)ret=(ret*a)%m;
        a=(a*a)%m;
        b>>=1;
    }
    return ret;
}

inline int128 mod(int128 a,int128 b){
    int128 c=a%b;
    if(c<0)return c+b;
    return c;
}

int main(){
    nodeId=MyNodeId();
    numberOfNodes=NumberOfNodes();
    S=SignalLength();
    M=SeqLength();

    LL l=nodeId*S/numberOfNodes;
    LL r=(nodeId+1)*S/numberOfNodes;
    int128 hash1=0;
    int128 base1=pow(BASE1,l,MOD1);
    int128 hash2=0;
    int128 base2=pow(BASE2,l,MOD2);
    int128 hash3=0;
    int128 base3=pow(BASE3,l,MOD3);
    for(LL i=l;i<r;++i){
        LL v=SignalAt(i+1)+1;
        hash1=(hash1+base1*v)%MOD1;
        base1=(base1*BASE1)%MOD1;
        hash2=(hash2+base2*v)%MOD2;
        base2=(base2*BASE2)%MOD2;
        hash3=(hash3+base3*v)%MOD3;
        base3=(base3*BASE3)%MOD3;
    }
    if(nodeId!=0){
        PutLL(0,hash1);
        PutLL(0,hash2);
        PutLL(0,hash3);
        Send(0);

        Receive(0);
        hash1=GetLL(0);
        hash2=GetLL(0);
        hash3=GetLL(0);
    }else{
        for(int i=1;i<numberOfNodes;++i){
            Receive(i);
            LL h1=GetLL(i);
            LL h2=GetLL(i);
            LL h3=GetLL(i);

            hash1=(hash1+h1)%MOD1;
            hash2=(hash2+h2)%MOD2;
            hash3=(hash3+h3)%MOD3;
        }
        for(int i=1;i<numberOfNodes;++i){
            PutLL(i,hash1);
            PutLL(i,hash2);
            PutLL(i,hash3);
            Send(i);
        }
    }
    
    LL sigHash1=hash1;
    LL sigHash2=hash2;
    LL sigHash3=hash3;

    numberOfNodes=min((LL)numberOfNodes,M);
    if(nodeId>=numberOfNodes)return 0;




    vector<pair<int,pair<LL,pair<LL,LL> > > > toSend;
    l=nodeId*M/numberOfNodes;
    r=(nodeId+1)*M/numberOfNodes;
    LL pow1=pow(BASE1,l,MOD1);
    LL pow2=pow(BASE2,l,MOD2);
    LL pow3=pow(BASE3,l,MOD3);
    hash1=0;
    base1=pow1;
    hash2=0;
    base2=pow2;
    hash3=0;
    base3=pow3;
    LL p=0;
    int source=-1;
    for(LL i=l;i<r;++i){
        while(p*M/numberOfNodes<i+S){
            if(p*M/numberOfNodes<=l-S)source=p;
            ++p;
        }
        if(p<numberOfNodes && p*M/numberOfNodes==(i+S)){
            toSend.push_back(make_pair(p,make_pair(hash1,make_pair(hash2,hash3))));
        }
        LL v=SeqAt(i+1)+1;
        hash1=(hash1+base1*v)%MOD1;
        base1=(base1*BASE1)%MOD1;
        hash2=(hash2+base2*v)%MOD2;
        base2=(base2*BASE2)%MOD2;
        hash3=(hash3+base3*v)%MOD3;
        base3=(base3*BASE3)%MOD3;
    }

    int128 prefHash1=0;
    int128 prefHash2=0;
    int128 prefHash3=0;
    if(nodeId!=0){
        PutLL(0,hash1);
        PutLL(0,hash2);
        PutLL(0,hash3);
        Send(0);

        Receive(0);
        prefHash1=GetLL(0);
        prefHash2=GetLL(0);
        prefHash3=GetLL(0);
    }else{
        prefHash1=0;
        prefHash2=0;
        prefHash3=0;
        for(int i=1;i<numberOfNodes;++i){
            PutLL(i,hash1);
            PutLL(i,hash2);
            PutLL(i,hash3);
            Send(i);

            Receive(i);
            LL h1=GetLL(i);
            LL h2=GetLL(i);
            LL h3=GetLL(i);
            hash1=(hash1+h1)%MOD1;
            hash2=(hash2+h2)%MOD2;
            hash3=(hash3+h3)%MOD3;
        }
    }
    for(pair<int,pair<LL,pair<LL,LL> > > p:toSend){
        PutLL(p.first,(prefHash1+p.second.first)%MOD1);
        PutLL(p.first,(prefHash2+p.second.second.first)%MOD2);
        PutLL(p.first,(prefHash3+p.second.second.second)%MOD3);
        Send(p.first);
    }




    int128 lhash1=0;
    int128 lbase1=1;
    int128 lhash2=0;
    int128 lbase2=1;
    int128 lhash3=0;
    int128 lbase3=1;
    hash1=prefHash1;
    hash2=prefHash2;
    hash3=prefHash3;
    base1=pow1;
    base2=pow2;
    base3=pow3;
    LL i=l;
    LL ans=0;
    if(l-S>=0){
        //assert(source!=-1);
        Receive(source);
        lhash1=GetLL(source);
        lbase1=pow(BASE1,i-S,MOD1);
        lhash2=GetLL(source);
        lbase2=pow(BASE2,i-S,MOD2);
        lhash3=GetLL(source);
        lbase3=pow(BASE3,i-S,MOD3);
    }else{
        if(S<=r){
            for(;i<S;++i){
                LL v=SeqAt(i+1)+1;
                hash1=(hash1+base1*v)%MOD1;
                base1=(base1*BASE1)%MOD1;
                hash2=(hash2+base2*v)%MOD2;
                base2=(base2*BASE2)%MOD2;
                hash3=(hash3+base3*v)%MOD3;
                base3=(base3*BASE3)%MOD3;
            }
        }else i=r;
    }
    for(;i<r;++i){
        if(mod(hash1-lhash1,MOD1)==(sigHash1*lbase1)%MOD1 && mod(hash2-lhash2,MOD2)==(sigHash2*lbase2)%MOD2 && mod(hash3-lhash3,MOD3)==(sigHash3*lbase3)%MOD3)
            ++ans;

        LL v=SeqAt(i+1)+1;
        hash1=(hash1+base1*v)%MOD1;
        base1=(base1*BASE1)%MOD1;
        hash2=(hash2+base2*v)%MOD2;
        base2=(base2*BASE2)%MOD2;
        hash3=(hash3+base3*v)%MOD3;
        base3=(base3*BASE3)%MOD3;

        v=SeqAt(i-S+1)+1;
        lhash1=(lhash1+lbase1*v)%MOD1;
        lbase1=(lbase1*BASE1)%MOD1;
        lhash2=(lhash2+lbase2*v)%MOD2;
        lbase2=(lbase2*BASE2)%MOD2;
        lhash3=(lhash3+lbase3*v)%MOD3;
        lbase3=(lbase3*BASE3)%MOD3;
    }
    if(nodeId==numberOfNodes-1){
        if(mod(hash1-lhash1,MOD1)==(sigHash1*lbase1)%MOD1 && mod(hash2-lhash2,MOD2)==(sigHash2*lbase2)%MOD2 && mod(hash3-lhash3,MOD3)==(sigHash3*lbase3)%MOD3)
            ++ans;
    }

    if(nodeId!=0){
        PutInt(0,ans);
        Send(0);
    }else{
        for(int i=1;i<numberOfNodes;++i){
            Receive(i);
            ans+=GetInt(i);
        }
        printf("%d",ans);
    }

    return 0;
}