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1237.cpp
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1237.cpp
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#include<iostream>
#include<string>
using namespace std;
int lcs(string X, string Y)
{
int m = X.length();
int n = Y.length();
int c[m+1][n+1];
for(int i = 0; i < m+1; i++)
for(int j = 0; j < n+1; j++)
c[i][j] = 0;
for(int i = 1; i < m+1; i++)
{
for(int j = 1; j < n+1; j++)
{
if(i == 0 || j == 0)
c[i][j] = 0;
else if(X[i-1] == Y[j-1])
c[i][j] = c[i-1][j-1] + 1;
else if(c[i-1][j] >= c[i][j-1])
c[i][j] = c[i-1][j];
else
c[i][j] = c[i][j-1];
}
}
return c[m][n];
}
int lcs2(string X, string Y)
{
int m = X.length();
int n = Y.length();
int z = 0;
int c[m+1][n+1];
for(int i = 1; i < m+1; i++)
{
for(int j = 1; j < n+1; j++)
{
if(i == 0 || j == 0)
c[i][j] = 0;
if(X[i-1] == Y[j-1])
{
if(i == 1 || j == 1)
c[i][j] = 1;
else
c[i][j] = c[i-1][j-1] + 1;
if(c[i][j] > z)
z = c[i][j];
}
else
c[i][j] = 0;
}
}
return z;
}
int main()
{
int contador = 0;
string texto, s1, s2;
while(getline(cin, texto))
{
if(contador == 0)
{
s1 = texto;
contador++;
}
else if(contador == 1)
{
s2 = texto;
contador = 2;
}
if(contador == 2)
{
cout << lcs(s1,s2) << endl;
contador = 0;
}
}
return 0;
}