Submission #162677

#	Time	Username	Problem	Language	Result	Execution time	Memory
162677		_qVp_	Cezar (COCI16_cezar)	C++14	70 / 100	8 ms	472 KiB

cezar

#include <bits/stdc++.h>

using namespace std;

const int md = 105;
const int oo = 1e9;

int low[md], num[md], a[md], ans[md], in[md];
stack < int > st;
vector < int > adj[md], topo;
int cnt, n;
string s1[md], s[md];

void tarjan(int u) {
    st.push(u);
    //cout << u << '\n';
    low[u] = num[u] = ++cnt;
    for(int i = 0; i < adj[u].size(); i++) {
        int v = adj[u][i];
        if (num[v]) 
            low[u] = min(low[u], num[v]);
        else {
            tarjan(v);
            low[u] = min(low[u], low[v]);
        }
    }
    if (low[u] == num[u]) {
        int v = 0, c = 0;
        do {
            v = st.top(); st.pop();
            c++;
            low[u] = num[u] = oo;
        } while (v != u);
        if (c >= 2) {
            cout << "NE";
            exit(0);
        }
    }
    topo.push_back(u);
}

int main() {
    //freopen("test.in", "r", stdin);
    ios_base::sync_with_stdio(0);
    cin >> n;
    for(int i = 1; i <= n; i++)
        cin >> s1[i];
    for(int i = 1; i <= n; i++) {
        int x;
        cin >> x;
        s[i] = s1[x];
    }
    for(int u = 1; u < n; u++) {
        //int u = a[i];
        //cerr << s[u] << endl;
        //int v = u + 1;
        for(int v = u + 1; v <= n; v++) {
            int len = min(s[u].size(), s[v].size());
            //cerr << s[v] << " ";
            bool ok = false;
            for(int k = 0; k < len; k++) 
                if (s[u][k] != s[v][k]) {
                    ok = true;
                    //cout << (s[v][k] - 'a') << " " << (s[u][k] - 'a') << endl;
                    adj[s[v][k] - 'a'].push_back(s[u][k] - 'a');
                    in[s[u][k] - 'a']++;
                    break;
                }
            if (ok == false && s[u].size() > s[v].size())  {
                cout << "NE";
                return 0;
            }
        }
        //cerr << endl;
    }
    //cerr  << "checking";  
    for(int i = 0; i < 26; i++)
        if (!in[i])
            tarjan(i);
    int cnt = 0;
    for(int i = 0; i < topo.size(); i++) {
        //cout << topo[i] << " ";
        ans[topo[i]] = i;
    }
    cout << "DA\n";
    for(int i = 0; i < 26; i++)
        cout << char(ans[i] + 'a');
    return 0;
}

Compilation message (stderr)

cezar.cpp: In function 'void tarjan(int)':
cezar.cpp:18:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int i = 0; i < adj[u].size(); i++) {
                    ~~^~~~~~~~~~~~~~~
cezar.cpp: In function 'int main()':
cezar.cpp:81:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int i = 0; i < topo.size(); i++) {
                    ~~^~~~~~~~~~~~~
cezar.cpp:80:9: warning: unused variable 'cnt' [-Wunused-variable]
     int cnt = 0;
         ^~~

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