oj.uz

Submission #1016372

# Submission time Handle Problem Language Result Execution time Memory
1016372 2024-07-08T02:18:47 Z nrg_studio Mecho (IOI09_mecho) C++17
84 / 100
 148 ms 5660 KB 
#include <bits/stdc++.h>
using namespace std;

#define ll long long
#define pb push_back
#define pii pair<int,int>
#define mp make_pair
#define f first
#define s second
#define FOR(i, a, b, s) for (int i = (a); i < (b); i += s)
#define F0R(i, a) for (int i = 0; i < (a); i++)

vector<vector<int>> g;
pii mecho, home;
int n, s;
pii d[4] = {{0,1},{0,-1},{1,0},{-1,0}};

bool check(int t) {
	vector<vector<int>> dist(n+2,vector<int>(n+2,INT_MAX));
	dist[mecho.f][mecho.s] = t*s;
	queue<pii> q; q.push(mecho);
	
	while (q.size()) {
		pii cur = q.front(); q.pop();
		if (dist[cur.f][cur.s]>=g[cur.f][cur.s]) {continue;}
		for (pii y : d) {
			if (dist[cur.f+y.f][cur.s+y.s]==INT_MAX) {
				dist[cur.f+y.f][cur.s+y.s] = dist[cur.f][cur.s]+1;
				q.push({cur.f+y.f,cur.s+y.s});
			}
		}
	} return (dist[home.f][home.s]!=INT_MAX);
}

int main() {
	ios::sync_with_stdio(false); cin.tie(0); cout.tie(0);
	
	cin >> n >> s;
	g = vector<vector<int>>(n+2,vector<int>(n+2,INT_MAX));
	char c; queue<pii> q;
	F0R(i,n) {
		F0R(j,n) {
			cin >> c;
			if (c=='M') {mecho = {i+1,j+1};}
			else if (c=='D') {home = {i+1,j+1};}
			else if (c=='H') {g[i+1][j+1]=0; q.push({i+1,j+1});}
			else if (c=='G') {g[i+1][j+1]=-1;}
			else if (c=='T') {g[i+1][j+1]=-2;}
		}
	}
	F0R(i,n+1) {g[0][i] = g[i][0] = g[n+1][i] = g[i][n+1] = -2;}
	while (q.size()) {
		pii x = q.front(); q.pop();
		for (pii y : d) {
			if (g[x.f+y.f][x.s+y.s]==-1) {
				g[x.f+y.f][x.s+y.s]=g[x.f][x.s]+s;
				q.push({x.f+y.f,x.s+y.s});
			}
		}
	} 
	int l = 0, h = n*n, m = (l+h)/2, ans = -1;
	while (l <= h) {
		if (check(m)) {ans = m; l = m+1;}
		else {h = m-1;}
		m = (l+h)/2;
	} cout << ans << '\n';
}

Subtask #1
84.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 54 ms 5628 KB Output is correct
8 Correct 0 ms 344 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 344 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Incorrect 0 ms 348 KB Output isn't correct
13 Incorrect 0 ms 348 KB Output isn't correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 0 ms 348 KB Output is correct
22 Correct 0 ms 348 KB Output is correct
23 Correct 0 ms 348 KB Output is correct
24 Correct 0 ms 348 KB Output is correct
25 Correct 0 ms 348 KB Output is correct
26 Correct 0 ms 348 KB Output is correct
27 Correct 0 ms 348 KB Output is correct
28 Correct 0 ms 348 KB Output is correct
29 Correct 0 ms 348 KB Output is correct
30 Correct 1 ms 344 KB Output is correct
31 Correct 1 ms 344 KB Output is correct
32 Correct 0 ms 348 KB Output is correct
33 Correct 5 ms 1456 KB Output is correct
34 Correct 6 ms 1444 KB Output is correct
35 Correct 14 ms 1452 KB Output is correct
36 Correct 7 ms 1628 KB Output is correct
37 Correct 8 ms 1748 KB Output is correct
38 Correct 19 ms 1756 KB Output is correct
39 Correct 9 ms 2084 KB Output is correct
40 Correct 10 ms 2084 KB Output is correct
41 Correct 27 ms 2132 KB Output is correct
42 Correct 11 ms 2524 KB Output is correct
43 Correct 11 ms 2452 KB Output is correct
44 Correct 32 ms 2444 KB Output is correct
45 Correct 13 ms 2880 KB Output is correct
46 Correct 20 ms 2920 KB Output is correct
47 Correct 42 ms 2888 KB Output is correct
48 Correct 15 ms 3324 KB Output is correct
49 Correct 16 ms 3400 KB Output is correct
50 Correct 42 ms 3324 KB Output is correct
51 Correct 19 ms 3876 KB Output is correct
52 Correct 19 ms 3828 KB Output is correct
53 Correct 55 ms 3876 KB Output is correct
54 Correct 20 ms 4408 KB Output is correct
55 Correct 22 ms 4412 KB Output is correct
56 Correct 63 ms 4384 KB Output is correct
57 Correct 23 ms 4956 KB Output is correct
58 Correct 26 ms 4964 KB Output is correct
59 Correct 74 ms 4952 KB Output is correct
60 Correct 28 ms 5564 KB Output is correct
61 Correct 33 ms 5628 KB Output is correct
62 Correct 85 ms 5576 KB Output is correct
63 Correct 89 ms 5596 KB Output is correct
64 Correct 148 ms 5548 KB Output is correct
65 Correct 117 ms 5528 KB Output is correct
66 Correct 101 ms 5520 KB Output is correct
67 Correct 100 ms 5560 KB Output is correct
68 Correct 52 ms 5580 KB Output is correct
69 Correct 49 ms 5608 KB Output is correct
70 Correct 43 ms 5588 KB Output is correct
71 Correct 43 ms 5592 KB Output is correct
72 Incorrect 56 ms 5560 KB Output isn't correct
73 Incorrect 45 ms 5628 KB Output isn't correct
74 Correct 41 ms 5600 KB Output is correct
75 Correct 49 ms 5584 KB Output is correct
76 Correct 44 ms 5576 KB Output is correct
77 Correct 41 ms 5592 KB Output is correct
78 Correct 47 ms 5608 KB Output is correct
79 Correct 35 ms 5604 KB Output is correct
80 Correct 39 ms 5592 KB Output is correct
81 Correct 41 ms 5588 KB Output is correct
82 Correct 42 ms 5588 KB Output is correct
83 Correct 49 ms 5596 KB Output is correct
84 Correct 44 ms 5596 KB Output is correct
85 Correct 47 ms 5632 KB Output is correct
86 Correct 48 ms 5660 KB Output is correct
87 Correct 50 ms 5568 KB Output is correct
88 Correct 50 ms 5660 KB Output is correct
89 Correct 51 ms 5660 KB Output is correct
90 Correct 53 ms 5600 KB Output is correct
91 Correct 46 ms 5592 KB Output is correct
92 Correct 52 ms 5556 KB Output is correct