#include<bits/stdc++.h>
#define IOS ios_base::sync_with_stdio(false);cin.tie();cout.tie();
#define all(x) x.begin(), x.end()
#define lnl long long
#define pq priority_queue
#define eb emplace_back
#define lb lower_bound
#define ub upper_bound
#define pb push_back
#define pp pop_back
#define F first
#define S second
using namespace std;
lnl dis[31][31];
char c[31][31];
void build() {
dis[0][0] = 1;
for (int i = 0; i <= 30; i++) {
for (int j = 0; j <= 30; j++) {
if (i) dis[i][j] += dis[i-1][j];
if (j) dis[i][j] += dis[i][j-1];
}
}
}
void solve () {
build();
int n, m; cin >> n >> m;
for (int i = 0; i < n; i++) {
for (int j = 0; j < m; j++) {
cin >> c[i][j];
}
}
int k; cin >> k;
n--; m--;
int x = 0, y = 0;
string ans;
while (x != n || y != m) {
//cout << x << ' ' << y << ' ' << n << ' ' << m << ' ' << k << '\n';
ans += c[x][y];
if (x == n) {
while (y != m) {
y++;
ans += c[x][y];
}
break ;
}
if (y == m) {
while (x != n) {
x++;
ans += c[x][y];
}
break ;
}
if (c[x+1][y] > c[x][y+1]) {
if (dis[n-x][m-y-1] < k) {k -= dis[n-x][m-y-1]; x++;}
else y++;
}
else {
if (dis[n-x-1][m-y] < k) {k -= dis[n-x-1][m-y]; y++;}
else x++;
}
}
cout << ans;
}
int main() {IOS solve(); return 0;}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
1 ms |
336 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
