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Cod sursa(job #824590)
#include<cstring>
#include<fstream>
using namespace std;
ifstream f("cmlsc.in");
ofstream g("cmlsc.out");
char s1[1024], s2[1024], best[1024];
int d[1024][1024], bst, n, m, i, j;
int max(int a, int b){
if(a>b) return a;
else return b;
}
int main(){
f>>n>>m;
for(i=1; i<=n; ++i) f>>s1[i];
for(i=1; i<=m; ++i) f>>s2[i];
for(i=1; i<=n; ++i)
for(j=1; j<=m; ++j)
if(s1[i]==s2[j])
d[i][j]=1+d[i-1][j-1];
else d[i][j]= max(d[i-1][j], d[i][j-1]);
for(i=n, j=m; i>=1;)
if(s1[i]==s2[j])
best[++bst]=s1[i], --i, --j;
else if(d[i-1][j]<d[i][j-1]) --j;
else --i;
for(i=bst; i>=1; --i)
g<<best[i];
g<<'\n';
return 0;
}