Ruudukko

#include <bits/stdc++.h>
#define ll long long
#define ull unsigned long long

using namespace std;

int n;
char chaa[3030][3030];
bool qaq[3030][3030];
priority_queue<pair<string, pair<int,int>>> q;

int main() {
	cin.tie(0);
	cout.tie(0);
	ios_base::sync_with_stdio(0);
	cin >> n;
	for(int i=1; i<=n; i++) {
		for(int j=1; j<=n; j++) {
			cin >> chaa[j][i];
		}
	}
	string aaa = "";
	aaa.push_back(chaa[1][1]);
	q.push(make_pair(aaa, make_pair(1, 1)));
	while(q.top().second.first!=n||q.top().second.second!=n) {
		pair<string, pair<int,int>> up;
		string sa = q.top().first;
		int xx = q.top().second.first;
		int yy = q.top().second.second;
		q.pop();
		if(xx>n)
			continue;
		else if(yy>n)
			continue;
		if(q.top().second.first==n) { // X on limit
			sa.push_back(chaa[xx][yy+1]);
			up.first = sa;
			up.second.first = xx;
			up.second.second = yy+1;
		} else if(q.top().second.second==n) { // Y ON LIMIT
			sa.push_back(chaa[xx+1][yy]);
			up.first = sa;
			up.second.first = xx+1;
			up.second.second = yy;
			q.push(up);
		} else { // VAPAUS
			if(chaa[xx+1][yy]<chaa[xx][yy+1]) {

			sa.push_back(chaa[xx+1][yy]);
			up.first = sa;
			up.second.first = xx+1;
			up.second.second = yy;
			q.push(up);
			} else if(chaa[xx+1][yy]>chaa[xx][yy+1]) {
			
			sa.push_back(chaa[xx][yy+1]);
			up.first = sa;
			up.second.first = xx;
			up.second.second = yy+1;
			} else {
			string sss = sa;
			sss.push_back(chaa[xx+1][yy]);
			up.first = sss;
			up.second.first = xx+1;
			up.second.second = yy;
		q.push(up);		
		sa.push_back(chaa[xx][yy+1]);
			up.first = sa;
			up.second.first = xx;
			up.second.second = yy+1;
			}
			}
		q.push(up);
	}
	cout << q.top().first;
}

Test 1

Group: 1

Verdict: ACCEPTED

Test 2

Group: 1

Verdict: ACCEPTED

Test 3

Group: 1

Verdict: ACCEPTED

Test 4

Group: 1

Verdict: ACCEPTED

Test 5

Group: 1

Verdict: ACCEPTED

Test 6

Group: 2

Verdict: WRONG ANSWER

Test 7

Group: 2

Verdict: WRONG ANSWER

Test 8

Group: 2

Verdict: WRONG ANSWER

Test 9

Group: 2

Verdict: TIME LIMIT EXCEEDED

Test 10

Group: 2

Verdict: WRONG ANSWER

Test 11

Group: 3

Verdict: WRONG ANSWER

Test 12

Group: 3

Verdict: WRONG ANSWER

Test 13

Group: 3

Verdict: WRONG ANSWER

Test 14

Group: 3

Verdict: WRONG ANSWER

Test 15

Group: 3

Verdict: WRONG ANSWER