c_cpp https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&page=show_proble

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#include <bits/stdc++.h>

#define ll long long
#define sz(v) ((int) ((v).size()))
#define clr(v, d) memset(v, d, sizeof(v))
#define lp(i, n) for(int i = 0; i < (int)(n); ++i)
#define rep(i, v) for(int i = 0; i < sz(v); ++i)

using namespace std;

int n;
const int MAX = 1e2+5;
const int OO = 1e9;

string s1, s2;
int n1, n2;
int cache[MAX][MAX];

int lcm(int i, int j) {
    if(i == n1 || j == n2)
        return 0;

    int &ret = cache[i][j];
    if(ret != -1)
        return ret;
    int ch1 = -1*OO;
    if(s1[i] == s2[j])
        ch1 = 1+lcm(i+1, j+1);
    int ch2 = lcm(i, j+1);
    int ch3 = lcm(i+1, j);

    return ret = max(max(ch1, ch2), ch3);
}


int main() {
    int t =1;
    while(getline(cin, s1) && s1 != "#" ) {
        getline(cin, s2);
        n1 = s1.length();
        n2 = s2.length();
        clr(cache, -1);
        cout << "Case #"<< t <<": you can visit at most " << lcm(0, 0) << " cities.\n";
        t++;
    }
    return 0;
}

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