oj.uz

Submission #649072

# Submission time Handle Problem Language Result Execution time Memory
649072 2022-10-09T07:05:59 Z rickbaishuak Tracks in the Snow (BOI13_tracks) C++14
82.5 / 100
 2000 ms 1048576 KB 
#include <bits/stdc++.h>
#define pb push_back
#define er erase
#define in insert
#define s(a, x, y) sort(a.begin()+x, a.begin()+y);
#define r(a, x, y) reverse(a.begin()+x, a.begin()+y);
#define mp make_pair
#define F first
#define S second
#define ll long long
#define ld long double
#define forn(i, a, b) for(int i=a; i<=b; i++)
#define form(i, a, b) for(int i=a; i>=b; i--)
#define PI 3.14159265358979
#define inf 2147483647
#define sp setprecision
#define pii pair <int, int>
#define gcd __gcd
#define endl '\n'
#define sz(a) (int)a.size()
using namespace std;
const ll N = 4000 + 13;
ll t1, n, m, d[N][N], ans;
vector <pii> g[N][N];
string t;
char s[N][N];
deque <pii> q;
bool st1[N][N], st2[N][N];
pii v;
void solve(){
	cin >> n >> m;
	forn (i, 1, max (n, m)){
		s[i][0] = s[0][i] = '.';
	}
	forn (i, 1, n){
		cin >> t;
		forn (j, 1, m){
			s[i][j] = t[j - 1];
			if (s[i][j] != '.' && s[i - 1][j] != '.') {
				g[i][j].pb ({i - 1, j});
				g[i - 1][j].pb ({i, j});
				if (s[i][j] == s[i - 1][j]) st2[i][j] = 0;
				else st2[i][j] = 1;
			}
			if (s[i][j] != '.' && s[i][j - 1] != '.') {
				g[i][j].pb ({i, j - 1});
				g[i][j - 1].pb ({i, j});
				if (s[i][j] == s[i][j - 1]) st1[i][j] = 0;
				else st1[i][j] = 1;
			}
		}
	}
	q.push_back ({1, 1});
	d[1][1] = 1;
	while (sz(q)){
		v = q[0];
		q.pop_front();
		for (pii to: g[v.F][v.S]){
			if (!d[to.F][to.S]){
				d[to.F][to.S] = d[v.F][v.S];
				if (v.F == to.F && !st1[v.F][max (v.S, to.S)] || v.S == to.S && !st2[max (v.F, to.F)][v.S]) q.push_front (to);
				else {
					q.push_back (to);
					d[to.F][to.S] ++;
					ans = max (ans, d[to.F][to.S]);
				}
			}
		}
	}
//	forn (i, 1, n){
//		forn (j, 1, m){
//			cout << d[i][j];
//		}
//		cout << endl;
//	}
	cout << ans << endl;
}
int main(){
	ios_base::sync_with_stdio(false);
	cin.tie(NULL);
	cout.tie(NULL);
//	cin >> t1;
	t1 = 1;
	while (t1 --){
		solve();
	}
	return 0;
}
/*
5
0.50 0.29 0.49 0.95 0.66
2 3
0 3
3 4
2 1

5
0.50 0.29 0.49 0.95 0.83
2 3
0 3
3 4
2 1
1
4 0.66
*/

Compilation message

tracks.cpp: In function 'void solve()':
tracks.cpp:61:21: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   61 |     if (v.F == to.F && !st1[v.F][max (v.S, to.S)] || v.S == to.S && !st2[max (v.F, to.F)][v.S]) q.push_front (to);
      |         ~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 231 ms 399320 KB Output is correct
2 Correct 179 ms 378716 KB Output is correct
3 Correct 180 ms 379360 KB Output is correct
4 Correct 208 ms 395000 KB Output is correct
5 Correct 208 ms 384428 KB Output is correct
6 Correct 178 ms 378724 KB Output is correct
7 Correct 188 ms 379320 KB Output is correct
8 Correct 196 ms 379712 KB Output is correct
9 Correct 176 ms 380164 KB Output is correct
10 Correct 186 ms 384000 KB Output is correct
11 Correct 191 ms 383892 KB Output is correct
12 Correct 194 ms 387656 KB Output is correct
13 Correct 188 ms 384352 KB Output is correct
14 Correct 194 ms 384312 KB Output is correct
15 Correct 217 ms 396324 KB Output is correct
16 Correct 244 ms 399436 KB Output is correct
17 Correct 205 ms 392520 KB Output is correct
18 Correct 215 ms 395184 KB Output is correct

Subtask #2
52.5 / 70.0

# Verdict Execution time Memory Grader output
1 Correct 230 ms 429088 KB Output is correct
2 Correct 306 ms 433136 KB Output is correct
3 Correct 769 ms 638484 KB Output is correct
4 Correct 373 ms 456948 KB Output is correct
5 Correct 611 ms 603852 KB Output is correct
6 Runtime error 1536 ms 1048576 KB Execution killed with signal 9
7 Correct 201 ms 431236 KB Output is correct
8 Correct 206 ms 429020 KB Output is correct
9 Correct 198 ms 395616 KB Output is correct
10 Correct 189 ms 394624 KB Output is correct
11 Correct 200 ms 426888 KB Output is correct
12 Correct 171 ms 380852 KB Output is correct
13 Correct 305 ms 433048 KB Output is correct
14 Correct 252 ms 414044 KB Output is correct
15 Correct 250 ms 407248 KB Output is correct
16 Correct 239 ms 408432 KB Output is correct
17 Correct 504 ms 497712 KB Output is correct
18 Correct 462 ms 468288 KB Output is correct
19 Correct 376 ms 456696 KB Output is correct
20 Correct 319 ms 455892 KB Output is correct
21 Correct 532 ms 547856 KB Output is correct
22 Correct 611 ms 603872 KB Output is correct
23 Correct 804 ms 591328 KB Output is correct
24 Correct 543 ms 544424 KB Output is correct
25 Correct 1639 ms 678624 KB Output is correct
26 Runtime error 1399 ms 1048576 KB Execution killed with signal 9
27 Runtime error 1396 ms 1048576 KB Execution killed with signal 9
28 Runtime error 1465 ms 1048576 KB Execution killed with signal 9
29 Runtime error 1451 ms 1048576 KB Execution killed with signal 9
30 Runtime error 1440 ms 1048576 KB Execution killed with signal 9
31 Execution timed out 2114 ms 959260 KB Time limit exceeded
32 Runtime error 1679 ms 1048576 KB Execution killed with signal 9