This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include<bits/stdc++.h>
#pragma GCC optimize ("Ofast")
using namespace std;
long long s,d[30],f[1502],g,h,j,k,mod=1000000000736009,mar=1507;
int i,a,l,n,m;
string x,z;
unordered_set<long long> q[2002];
main(){
//ios::sync_with_stdio(0);
d[0]=1;
for(i=1;i<30;i++){
d[i]=(d[i-1]*mar)%mod;
}
char c;
while((c=getchar())!='\n') x+=c;
while((c=getchar())!='\n') z+=c;
//if(x.size()>z.size()) swap(x,z);
//cout<<"*"<<x<<" "<<z<<"*";
n=x.size();
for(i=0;i<x.size();i++) x[i]-='a';
for(i=0;i<z.size();i++) {z[i]-='a';f[i]=i;}
random_shuffle(f,f+z.size());
for(i=0;i<n;i++){
h=0;
for(a=i;a<n;a++){
h+=d[x[a]];
if(h>mod) h-=mod;
q[a-i].insert(h);
}
}
m=z.size();
for(i=0;i<m;i++){
h=0;//cout<<f[i]<<" ";
//f=min(z.size(),i+x.size());
for(a=f[i];a<m;a++){
//if(a>i+x.size()) break;
h+=d[z[a]];
if(h>mod) h-=mod;
if(l<a-f[i]+1 && q[a-f[i]].find(h)!=q[a-f[i]].end()) l=a-f[i]+1;
}
}
cout<<l;
}
Compilation message (stderr)
interval.cpp:8:6: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
main(){
^
interval.cpp: In function 'int main()':
interval.cpp:20:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for(i=0;i<x.size();i++) x[i]-='a';
~^~~~~~~~~
interval.cpp:21:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for(i=0;i<z.size();i++) {z[i]-='a';f[i]=i;}
~^~~~~~~~~
interval.cpp:26:22: warning: array subscript has type 'char' [-Wchar-subscripts]
h+=d[x[a]];
^
interval.cpp:38:22: warning: array subscript has type 'char' [-Wchar-subscripts]
h+=d[z[a]];
^
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