Submission #1023892

#	Time	Username	Problem	Language	Result	Execution time	Memory
1023892		Double_Slash	Cezar (COCI16_cezar)	C++17	30 / 100	1 ms	496 KiB

cezar

#include <bits/stdc++.h>
#define debug(x) [&] { auto _x = x; cerr << __LINE__ << ": " << #x << " = " << _x << endl; return _x; }()

using namespace std;

int n, deg[26], ans[26];
string raw[101], words[101];
vector<int> adj[26];

bool comp(int i, int j) {
    for (int k = 0; k < words[i].size(); ++k) {
        if (k == words[j].size()) return false;
        if (words[i][k] != words[j][k]) {
            adj[words[i][k] - 'a'].emplace_back(words[j][k] - 'a');
            deg[words[j][k] - 'a']++;
            break;
        }
    }
    return true;
}

bool solve() {
    for (int i = 1; i < n; ++i) {
        for (int j = i + 1; j <= n; ++j) {
            if (not comp(i, j)) return false;
        }
    }
    queue<int> q;
    for (int i = 0; i < 26; ++i) {
        if (not deg[i]) q.emplace(i);
    }
    int idx = 0;
    while (not q.empty()) {
        int i = q.front();
        q.pop();
        ans[i] = idx++;
        for (int j: adj[i]) {
            if (not --deg[j]) q.emplace(j);
        }
    }
    if (idx < 26) return false;
    cout << "DA\n";
    for (int i = 0; i < 26; ++i) cout << (char) ('a' + ans[i]);
    cout << endl;
    return true;
}

int main() {
    cin >> n;
    for (int i = 1; i <= n; ++i) cin >> raw[i];
    for (int i = 1; i <= n; ++i) {
        int j;
        cin >> j;
        words[i] = raw[j];
    }
    if (not solve()) cout << "NE\n";
    else {
        for (int i = 1; i <= n; ++i) {
            for (char &c: words[i]) {
                c = ans[c - 'a'] + 'a';
            }
            if (i > 1) assert(words[i] > words[i - 1]);
        }
    }
}

Compilation message (stderr)

cezar.cpp: In function 'bool comp(int, int)':
cezar.cpp:11:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   11 |     for (int k = 0; k < words[i].size(); ++k) {
      |                     ~~^~~~~~~~~~~~~~~~~
cezar.cpp:12:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   12 |         if (k == words[j].size()) return false;
      |             ~~^~~~~~~~~~~~~~~~~~

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