Created
July 7, 2020 04:21
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substr.cpp
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| #include<bits/stdc++.h> | |
| using namespace std; | |
| const long long base=31,mod=1000000003; | |
| long long hashP[1000006],hashC,POW[1000006],lenP,lenC; | |
| string strC,strP; | |
| long long gethash(int l,int r){ | |
| if (l==1){ | |
| return hashP[r]; | |
| } | |
| return (hashP[r]-hashP[l-1]*POW[r-l+1]+mod*mod)%mod; | |
| } | |
| int main(){ | |
| //freopen("test.inp","r",stdin); | |
| //freopen("test.out","w",stdout); | |
| cin>>strP; | |
| cin>>strC; | |
| lenP=strP.size(); | |
| lenC=strC.size(); | |
| strP=" "+strP; | |
| strC=" "+strC; | |
| for (int i=1;i<=lenC;i++){ | |
| hashC=(hashC*base+strC[i]-'a'+1)%mod; | |
| } | |
| POW[1]=base; | |
| for (int i=2;i<=lenP;i++){ | |
| POW[i]=(POW[i-1]*base)%mod; | |
| } | |
| for (int i=1;i<=lenP;i++){ | |
| hashP[i]=(hashP[i-1]*base+strP[i]-'a'+1)%mod; | |
| } | |
| for (int i=lenC;i<=lenP;i++){ | |
| long long tmp=gethash(i-lenC+1,i); | |
| if (hashC==tmp){ | |
| cout<<i-lenC+1<<" "; | |
| } | |
| } | |
| return 0; | |
| } |
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