oj.uz

Submission #162676

# Submission time Handle Problem Language Result Execution time Memory
162676 2019-11-09T08:26:22 Z _qVp_ Cezar (COCI16_cezar) C++14
50 / 100
 3 ms 504 KB 
#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);
}

void dfs(int u) {
    num[u] = 1;
    //cout << u << '\n';
    for(int i = 0; i < adj[u].size(); i++) {
        int v = adj[u][i];
        if (num[v]) continue;
        dfs(v);
    }
    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])
            dfs(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

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 'void dfs(int)':
cezar.cpp:45:22: 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:92:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int i = 0; i < topo.size(); i++) {
                    ~~^~~~~~~~~~~~~
cezar.cpp:91:9: warning: unused variable 'cnt' [-Wunused-variable]
     int cnt = 0;
         ^~~

Subtask #1
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Incorrect 2 ms 376 KB Output isn't correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 376 KB Output is correct

Subtask #3
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 380 KB Output is correct
2 Correct 2 ms 376 KB Output is correct

Subtask #4
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 376 KB Output is correct

Subtask #5
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 380 KB Output is correct
2 Incorrect 2 ms 376 KB Output isn't correct

Subtask #6
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 380 KB Output is correct

Subtask #7
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 376 KB Output is correct
2 Incorrect 3 ms 376 KB Output isn't correct

Subtask #8
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 376 KB Output is correct
2 Correct 2 ms 504 KB Output is correct

Subtask #9
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Incorrect 2 ms 376 KB Output isn't correct

Subtask #10
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 376 KB Output isn't correct
2 Halted 0 ms 0 KB -