#include using namespace std; struct Modint64{ //2^62未満&奇数modのみ. using Mint = Modint64; using u64 = uint64_t; using u128 = __uint128_t; static u64 mod,mod2,invmod,t128; u64 v = 0; Modint64(){v = 0;} Modint64(long long w){v = reduce((u128(w)+mod)*t128);} u64 val()const{ u64 ret = reduce(v); return ret >= mod ? ret-mod : ret; } static u64 getmod(){return mod;} static u64 getinvmod(){ u64 ret = mod; for(int i=0; i<5; i++) ret *= 2-mod*ret; return ret; } static void setmod(u64 m){ assert((m<(1LL<<62)) && (m&1)); mod = m; mod2 = m*2; t128 = -u128(mod)%mod; invmod = getinvmod(); } static u64 reduce(const u128 &v){return (v+u128(u64(v)*u64(-invmod))*mod) >> 64;} Mint operator+(const Mint &b)const{return Mint(*this)+=b;} Mint operator-(const Mint &b)const{return Mint(*this)-=b;} Mint operator*(const Mint &b)const{return Mint(*this)*=b;} Mint operator/(const Mint &b)const{return Mint(*this)/=b;} Mint operator-()const{return Mint()-Mint(*this);} Mint& operator+=(const Mint &b){ v += b.v; if(v >= mod2) v -= mod2; return *this; } Mint& operator-=(const Mint &b){ v += mod2-b.v; if(v >= mod2) v -= mod2; return *this; } Mint& operator*=(const Mint &b){ v = reduce(u128(v)*b.v); return *this; } Mint& operator/=(const Mint &b){ *this *= b.inv(); return *this; } Mint pow(u128 b)const{ Mint ret(1),p(*this); while(b){ if(b&1) ret *= p; p = p*p; b >>= 1; } return ret; } Mint inv()const{return pow(mod-2);} bool operator==(const Mint &b)const{return (v >= mod?v-mod:v) == (b.v >= mod?b.v-mod:b.v);} bool operator!=(const Mint &b)const{return (v >= mod?v-mod:v) != (b.v >= mod?b.v-mod:b.v);} }; typename Modint64::u64 Modint64::mod,Modint64::mod2,Modint64::invmod,Modint64::t128; bool MillerRabin(long long N,vector A){ using Mint = Modint64; Mint::setmod(N); int s = 0; long long d = N-1; while(d%2 == 0){s++,d >>= 1;} for(auto a : A){ if(N <= a) return true; int t = 0; Mint x = Mint(a).pow(d); if(x != 1){ for(; t < s; t++){ if(x == N-1) break; x *= x; } if(t == s) return false; } } return true; } bool isprime(long long N){ if(N <= 1) return false; if(N == 2) return true; if(N%2 == 0) return false; if(N < 475912314) return MillerRabin(N,{2,7,61}); return MillerRabin(N,{2,325,9375,28178,450775,9780504,1795265022}); } random_device rnd; mt19937 mt(rnd()); mt19937_64 mt2(rnd()); int getprime1(int minv,int range){ assert(minv+range >= 2); int ret = -1; while(true){ ret = mt()%range+minv; if(isprime(ret)) return ret; } } long long getprime2(long long minv,long long range){ assert(minv+range >= 2); long long ret = -1; while(true){ ret = mt2()%range+minv; if(isprime(ret)) return ret; } } int getvalue(int minv,int range){return mt()%range+minv;} struct SS{ int len; long long hash; bool operator==(SS &b){return (len == b.len && hash == b.hash);} }; class SegmentTreeHash{ public: int siz = 1,n = -1;; long long B = 1,mod = 1; vector pB; vector dat; SS op(SS a, SS b){return {a.len+b.len,(a.hash*pB.at(b.len)+b.hash)%mod};} SS e(){return {0,0};} void renew (SS &a,SS x){ //a = op(a,x); a = x; //その他. } void make(int N){ n = N; while(siz < N) siz *= 2; dat.resize(siz*2,{0,0}); } void make3(int N,string &A,int M,int b){ make(N); pB.resize(N+1,1); mod = M; B = b; for(int i=1; i<=N; i++) pB.at(i) = pB.at(i-1)*B%mod; for(int i=0; i0; i--) dat.at(i) = op(dat.at(i*2),dat.at(i*2+1)); } void update(int pos,char x){ int pos2 = n-1-pos+siz; pos += siz; renew(dat.at(pos),{1,x}); while(pos != 1){ pos = pos/2; dat.at(pos) = op(dat.at(pos*2),dat.at(pos*2+1)); } } SS findans(int l, int r){ SS retl = e(),retr = e(); l += siz,r += siz; while(l < r){ if(l&1) retl = op(retl,dat.at(l++)); if(r&1) retr = op(dat.at(--r),retr); l >>= 1; r >>= 1; } return op(retl,retr); } SS get1(int pos){return dat.at(pos+siz);} SS rangeans(int l,int r){return findans(l,r);} //ノーマルセグ木 二分探索は実装してない. }; int main() { ios_base::sync_with_stdio(false); cin.tie(nullptr); int N,L,Q; cin >> N >> L >> Q; long long mod = getprime1(1000000000,1000000),B = getvalue(1000000,1000000); long long mod2 = getprime1(1000000000,1000000),B2 = getvalue(1000000,1000000); vector> Z(N,vector(2)); for(int i=0; i> s; Z.at(i).at(0).make3(L,s,mod,B); Z.at(i).at(1).make3(L,s,mod2,B2); } while(Q--){ int ope; cin >> ope; if(ope == 1){ int pos; char c,d; cin >> pos >> c >> d; pos--; for(int i=0; i> t; long long hash1 = 0,hash2 = 0; for(auto c : t){ hash1 = hash1*B%mod,hash2 = hash2*B2%mod2; hash1 += c; hash2 += c; hash1 %= mod; hash2 %= mod; } int n = t.size(),answer = 0; for(int i=0; i