Problem Link : http://lightoj.com:81/volume/problem/1255
#include <bits/stdc++.h> #define pii pair <int,int> #define pll pair <long long,long long> #define sc scanf #define pf printf #define Pi 2*acos(0.0) #define ms(a,b) memset(a, b, sizeof(a)) #define pb(a) push_back(a) #define MP make_pair #define db double #define ll long long #define EPS 10E-10 #define ff first #define ss second #define sqr(x) (x)*(x) #define D(x) cout<<#x " = "<<(x)<<endl #define VI vector <int> #define DBG pf("Hi\n") #define MOD 1000000007 #define CIN ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0) #define SZ(a) (int)a.size() #define sf(a) scanf("%d",&a) #define sfl(a) scanf("%lld",&a) #define sff(a,b) scanf("%d %d",&a,&b) #define sffl(a,b) scanf("%lld %lld",&a,&b) #define sfff(a,b,c) scanf("%d %d %d",&a,&b,&c) #define sfffl(a,b,c) scanf("%lld %lld %lld",&a,&b,&c) #define stlloop(v) for(__typeof(v.begin()) it=v.begin();it!=v.end();it++) #define loop(i,n) for(int i=0;i<n;i++) #define loop1(i,n) for(int i=1;i<=n;i++) #define REP(i,a,b) for(int i=a;i<b;i++) #define RREP(i,a,b) for(int i=a;i>=b;i--) #define TEST_CASE(t) for(int z=1;z<=t;z++) #define PRINT_CASE printf("Case %d: ",z) #define CASE_PRINT cout<<"Case "<<z<<": " #define all(a) a.begin(),a.end() #define intlim 2147483648 #define infinity (1<<28) #define ull unsigned long long #define gcd(a, b) __gcd(a, b) #define lcm(a, b) ((a)*((b)/gcd(a,b))) using namespace std; /*----------------------Graph Moves----------------*/ //const int fx[]={+1,-1,+0,+0}; //const int fy[]={+0,+0,+1,-1}; //const int fx[]={+0,+0,+1,-1,-1,+1,-1,+1}; // Kings Move //const int fy[]={-1,+1,+0,+0,+1,+1,-1,-1}; // Kings Move //const int fx[]={-2, -2, -1, -1, 1, 1, 2, 2}; // Knights Move //const int fy[]={-1, 1, -2, 2, -2, 2, -1, 1}; // Knights Move /*------------------------------------------------*/ /*-----------------------Bitmask------------------*/ //int Set(int N,int pos){return N=N | (1<<pos);} //int reset(int N,int pos){return N= N & ~(1<<pos);} //bool check(int N,int pos){return (bool)(N & (1<<pos));} /*------------------------------------------------*/ /*---------------------Hashing---------------------*/ #define MH 1000006 #define Base1 10000019 #define Base2 10000079 #define MOD1 1000000007 #define MOD2 1000000009 ll B1[MH],B2[MH]; void init_hash() { B1[0]=B2[0]=1; for(int i=1;i<MH;i++) { B1[i]=(B1[i-1]*Base1)%MOD1; B2[i]=(B2[i-1]*Base2)%MOD2; } } struct Hash { pll H[MH]; int digit[MH]; int len; Hash() { len=0; H[0]=pll(0,0); } void clear() { len=0; H[0]=pll(0,0); } void insert(char ch) { len++; digit[len]=ch-'a'+1; H[len].ff=(((H[len-1].ff*Base1)%MOD1)+digit[len])%MOD1; H[len].ss=(((H[len-1].ss*Base2)%MOD2)+digit[len])%MOD2; } pll substr(int l, int r) { int sub_len=r-l+1; pll ans; ans.ff=(H[r].ff-((H[l-1].ff*B1[sub_len])%MOD1)+MOD1)%MOD1; ans.ss=(H[r].ss-((H[l-1].ss*B2[sub_len])%MOD2)+MOD2)%MOD2; return ans; } pll concate(pll h, int l, int r) { pll x=substr(l,r); int sub_len=r-l+1; h.ff=(((h.ff*B1[sub_len])%MOD1)+x.ff)%MOD1; h.ss=(((h.ss*B2[sub_len])%MOD2)+x.ss)%MOD2; return h; } bool operator==(const Hash& p) const { return len==p.len && H[len]==p.H[len]; } pll & operator[](int index) { return H[index]; } }; Hash h1,h2; int lcp(int id1, int id2, int l) { int lo=1,hi=l; while(lo<=hi) { int mid=(lo+hi)/2; if(h1.substr(id1,id1+mid)==h2.substr(id2,id2+mid)) lo=mid+1; else hi=mid-1; } return hi; } /*------------------Hashing End---------- ----------*/ char text[MH],pattern[MH]; int main() { ///freopen("in.txt","r",stdin); ///freopen("out.txt","w",stdout); init_hash(); int t; sf(t); getchar(); TEST_CASE(t) { sc("%s %s",text,pattern); int l1=strlen(text); int l2=strlen(pattern); h1.clear(); h2.clear(); for(int i=0;i<l1;i++) h1.insert(text[i]); for(int i=0;i<l2;i++) h2.insert(pattern[i]); int ans=0; for(int i=0;i<=l1-l2;i++) { if(h1.substr(i+1,i+l2)==h2[l2]) ans++; } PRINT_CASE; pf("%d\n",ans); } return 0; }