Submission #98787

#	Time	Username	Problem	Language	Result	Execution time	Memory
98787		someone_aa	Savez (COCI15_savez)	C++17	48 / 120	82 ms	21624 KiB

savez

#include <bits/stdc++.h>
#define ll long long
#define pb push_back
#define mp make_pair
using namespace std;
const int maxn = 510;
const ll mod = 468395662504823;
const ll k = 37;

int dp[maxn], n;
vector<ll>pref[maxn];
vector<ll>suff[maxn];
string codes[maxn];

bool match(int i, int j) {
    // returns true if we can put string i at string j
    if(codes[i].length() > codes[j].length()) return false;
    if(pref[j][codes[i].length()] == pref[i][codes[i].length()] && suff[j][codes[i].length()] == suff[i][codes[i].length()]) return true;
    return false;
}

int main() {
    cin>>n;
    for(int i=1;i<=n;i++) {
        cin>>codes[i];

        pref[i].pb(0);
        ll kk = 1LL;
        for(int j=0;j<codes[i].length();j++) {
            ll curr = pref[i].back() + (kk * (codes[i][j] - 'A' + 1))%mod;
            curr %= mod;
            kk *= k;
            kk %= mod;
            pref[i].pb(curr);
        }

        kk = 1LL;
        suff[i].pb(0);
        for(int j=codes[i].length()-1;j>=0;j--) {
            ll curr = suff[i].back() + (kk * (codes[i][j] - 'A' + 1))%mod;
            curr %= mod;
            kk *= k;
            kk %= mod;
            suff[i].pb(curr);
        }

    }

    int result = 0;
    for(int i=1;i<=n;i++) {
        dp[i] = 1;
        for(int j=1;j<i;j++) {
            if(match(j, i)) {
                dp[i] = max(dp[i], dp[j] + 1);
            }
        }
        result = max(result ,dp[i]);
    }
    cout<<result<<"\n";
    return 0;
}

Compilation message (stderr)

savez.cpp: In function 'int main()':
savez.cpp:29:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for(int j=0;j<codes[i].length();j++) {
                     ~^~~~~~~~~~~~~~~~~~

• Subtask 1: 12 / 12
• Subtask 2: 12 / 12
• Subtask 3: 12 / 12
• Subtask 4: 12 / 12
• Subtask 5: 0 / 12
• Subtask 6: 0 / 12
• Subtask 7: 0 / 12
• Subtask 8: 0 / 12
• Subtask 9: 0 / 12
• Subtask 10: 0 / 12