#define _CRT_SECURE_NO_WARNINGS
#include <bits/stdc++.h>
//#include <ext/pb_ds/tree_policy.hpp>
//#include <ext/pb_ds/assoc_container.hpp>
using namespace std;
//using namespace __gnu_pbds;
#define FOR(i,start,end) for(int i=start;i<(int)(end);i++)
#define FORE(i,start,end) for(int i=start;i<=(int)end;i++)
#define RFOR(i,start,end) for(int i = start; i>end; i--)
#define RFORE(i,start,end) for(int i = start; i>=end; i--)
#define vsort(a) sort(a.begin(), a.end());
#define mp make_pair
#define v vector
#define sf scanf
#define pf printf
typedef long long ll;
typedef pair<int, int > pii;
typedef pair<ll, ll> pll;
//template <class T> using ordered_set = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
void io();
struct fastStr {
string str;
int cmp(fastStr & other) { // returns idx of first different or -1 if no differnet
for (int i = 0; i < str.size() && i < other.str.size(); i++)
if (str[i] != other.str[i])
return i;
return -1;
}
};
int N;
v<fastStr> all;
v<int> adj[26]; // a->b :: a<b
v<int> topsort;
int prereq[26];
bool topo() { // topological sort a->b st a before b
FOR(i, 0, 26) for (int j : adj[i])
prereq[j] += i + 1;
priority_queue<int, vector<int>, greater<int>> q;
FOR(i, 0, 26)
if (prereq[i] == 0)
q.push(i);
while (!q.empty()) {
topsort.push_back(q.top());
int used = q.top();
q.pop();
for (int j : adj[used]) {
prereq[j] -= used + 1;
if (prereq[j] == 0)
q.push(j);
}
}
return topsort.size() == 26;
}
bool genAdj() {
FOR(i, 0, N - 1) {
int letterDif = all[i].cmp(all[i + 1]);
if (letterDif == -1) {
if (all[i].str.size() > all[i + 1].str.size())
return 0;
}
else {
adj[all[i].str[letterDif] - 'a'].push_back(all[i + 1].str[letterDif] - 'a');
// pf("%c < %c \n", all[i].str[letterDif], all[i + 1].str[letterDif]);
}
}
return 1;
}
void input() {
cin >> N;
v<fastStr> temp(N);
all.resize(N);
FOR(i, 0, N)
cin >> temp[i].str;
FOR(i, 0, N) {
int which;
cin >> which;
all[i] = temp[which - 1];
}
}
int main() {
io();
input();
if (!genAdj()) {
cout << "NE\n";
}
else {
if (!topo())
cout << "NE\n";
else {
cout << "DA\n";
FOR(i, 0, 26)
cout << (char)(topsort[i] + 'a');
cout << "\n";
}
}
return 0;
}
void io() {
#ifdef LOCAL_STUFF
freopen("input.in", "r", stdin);
freopen("output.out", "w", stdout);
#else
// online submission
#endif
ios_base::sync_with_stdio(false);
cin.tie(NULL);
}
Compilation message
cezar.cpp: In member function 'int fastStr::cmp(fastStr&)':
cezar.cpp:29:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for (int i = 0; i < str.size() && i < other.str.size(); i++)
~~^~~~~~~~~~~~
cezar.cpp:29:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for (int i = 0; i < str.size() && i < other.str.size(); i++)
~~^~~~~~~~~~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
2 ms |
376 KB |
Output is correct |
| 2 |
Correct |
3 ms |
632 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
2 ms |
632 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
3 ms |
680 KB |
Output is correct |
| 2 |
Correct |
2 ms |
720 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
2 ms |
724 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
2 ms |
732 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
2 ms |
740 KB |
Output is correct |
| 2 |
Correct |
2 ms |
824 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
2 ms |
844 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
3 ms |
844 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
3 ms |
844 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
2 ms |
844 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
