oj.uz

Submission #1013265

# Submission time Handle Problem Language Result Execution time Memory
1013265 2024-07-03T11:04:20 Z ducksaysquack Mecho (IOI09_mecho) C++
68 / 100
 176 ms 12196 KB 
#include <bits/stdc++.h>
#define int long long
#define f first
#define s second
using namespace std;
int n, m;
int C[]{0,1,0,-1}, R[]{1,0,-1,0};
pair<int,int> a, b; queue<pair<int,int>> q;
vector<vector<int>> g(805, vector<int>(805, 1e9));
vector<string> v(805);
bool bfs(int k) {
	vector<vector<int>> dis(n, vector<int>(n, 1e9));
	q.push(a); dis[a.f][a.s] = 0;
    while(!q.empty()) {
    	pair<int,int> r = q.front(); q.pop();
    	for(int i=0;i<4;i++) {
    		int x = r.f+R[i], y = r.s+C[i];
    		if(0 <= x && x < n && 0 <= y && y < n && ((dis[r.f][r.s]+1)/m < g[x][y]-k || (dis[r.f][r.s]+1)/m <= g[x][y]-k && v[x][y] == 'D'))
    			if(dis[r.f][r.s]+1 < dis[x][y] && (v[x][y] == 'G' || v[x][y] == 'D')) {
    				dis[x][y] = dis[r.f][r.s]+1;
    				q.push({x,y});
    			}
    	}
    }
    if(dis[b.f][b.s] == 1e9) return false;
    return true;
}
signed main() {
    //ios::sync_with_stdio(0); cin.tie(0);
    cin >> n >> m; for(int i=0;i<n;i++) cin >> v[i];
    for(int i=0;i<n;i++) for(int j=0;j<n;j++) {
    	if(v[i][j] == 'M') a.f = i, a.s = j;
    	if(v[i][j] == 'D') b.f = i, b.s = j;
    	if(v[i][j] == 'H') {q.push({i,j}); g[i][j] = 0;}
    }
    while(!q.empty()) {
    	pair<int,int> r = q.front(); q.pop();
    	for(int i=0;i<4;i++) {
    		int x = r.f+R[i], y = r.s+C[i];
    		if(0 <= x && x < n && 0 <= y && y < n) if(g[r.f][r.s]+1 < g[x][y] && v[x][y] == 'G') {
    			g[x][y] = g[r.f][r.s]+1;
    			q.push({x,y});
    		}
    	}
    }
    int l = 0, r = 1e6;
    while(l<r) {
    	int d = (l+r+1)/2;
    	if(bfs(d)) l = d;
    	else r = d-1;
    }
    cout << l;
}

Compilation message

mecho.cpp: In function 'bool bfs(long long int)':
mecho.cpp:18:117: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   18 |       if(0 <= x && x < n && 0 <= y && y < n && ((dis[r.f][r.s]+1)/m < g[x][y]-k || (dis[r.f][r.s]+1)/m <= g[x][y]-k && v[x][y] == 'D'))
      |                                                                                    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~

Subtask #1
68.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 5464 KB Output is correct
2 Correct 3 ms 5468 KB Output is correct
3 Correct 3 ms 5316 KB Output is correct
4 Correct 3 ms 5720 KB Output is correct
5 Correct 2 ms 5468 KB Output is correct
6 Correct 3 ms 5468 KB Output is correct
7 Correct 96 ms 12124 KB Output is correct
8 Incorrect 3 ms 5556 KB Output isn't correct
9 Correct 3 ms 5468 KB Output is correct
10 Correct 3 ms 5508 KB Output is correct
11 Correct 2 ms 5468 KB Output is correct
12 Incorrect 3 ms 5468 KB Output isn't correct
13 Incorrect 3 ms 5468 KB Output isn't correct
14 Incorrect 3 ms 5468 KB Output isn't correct
15 Correct 3 ms 5468 KB Output is correct
16 Correct 3 ms 5468 KB Output is correct
17 Correct 2 ms 5468 KB Output is correct
18 Correct 4 ms 5720 KB Output is correct
19 Correct 4 ms 5468 KB Output is correct
20 Correct 3 ms 5468 KB Output is correct
21 Correct 2 ms 5468 KB Output is correct
22 Correct 3 ms 5468 KB Output is correct
23 Correct 3 ms 5468 KB Output is correct
24 Correct 2 ms 5468 KB Output is correct
25 Correct 3 ms 5468 KB Output is correct
26 Correct 2 ms 5468 KB Output is correct
27 Correct 3 ms 5468 KB Output is correct
28 Correct 3 ms 5468 KB Output is correct
29 Correct 3 ms 5564 KB Output is correct
30 Correct 3 ms 5568 KB Output is correct
31 Correct 3 ms 5572 KB Output is correct
32 Correct 3 ms 5468 KB Output is correct
33 Correct 11 ms 6816 KB Output is correct
34 Correct 11 ms 6860 KB Output is correct
35 Correct 26 ms 6896 KB Output is correct
36 Correct 14 ms 7168 KB Output is correct
37 Correct 15 ms 7216 KB Output is correct
38 Correct 32 ms 7212 KB Output is correct
39 Correct 16 ms 7572 KB Output is correct
40 Correct 17 ms 7576 KB Output is correct
41 Correct 36 ms 7632 KB Output is correct
42 Correct 19 ms 8312 KB Output is correct
43 Correct 25 ms 8312 KB Output is correct
44 Correct 51 ms 8332 KB Output is correct
45 Correct 22 ms 8816 KB Output is correct
46 Correct 26 ms 8812 KB Output is correct
47 Correct 58 ms 8828 KB Output is correct
48 Correct 24 ms 9388 KB Output is correct
49 Correct 23 ms 9388 KB Output is correct
50 Correct 69 ms 9364 KB Output is correct
51 Correct 28 ms 10008 KB Output is correct
52 Correct 27 ms 10012 KB Output is correct
53 Correct 73 ms 9940 KB Output is correct
54 Correct 41 ms 10592 KB Output is correct
55 Correct 41 ms 10660 KB Output is correct
56 Correct 110 ms 10636 KB Output is correct
57 Correct 41 ms 11356 KB Output is correct
58 Correct 60 ms 11304 KB Output is correct
59 Correct 119 ms 11340 KB Output is correct
60 Correct 49 ms 12112 KB Output is correct
61 Correct 48 ms 12196 KB Output is correct
62 Correct 141 ms 12056 KB Output is correct
63 Correct 105 ms 12096 KB Output is correct
64 Correct 176 ms 11988 KB Output is correct
65 Correct 151 ms 12160 KB Output is correct
66 Correct 144 ms 12112 KB Output is correct
67 Incorrect 114 ms 12020 KB Output isn't correct
68 Correct 65 ms 12172 KB Output is correct
69 Correct 68 ms 12108 KB Output is correct
70 Correct 66 ms 12164 KB Output is correct
71 Correct 59 ms 12140 KB Output is correct
72 Incorrect 61 ms 12096 KB Output isn't correct
73 Incorrect 81 ms 12112 KB Output isn't correct
74 Correct 76 ms 12152 KB Output is correct
75 Correct 83 ms 12104 KB Output is correct
76 Correct 98 ms 12124 KB Output is correct
77 Correct 82 ms 12036 KB Output is correct
78 Incorrect 84 ms 12176 KB Output isn't correct
79 Correct 74 ms 12108 KB Output is correct
80 Correct 85 ms 12096 KB Output is correct
81 Correct 84 ms 12092 KB Output is correct
82 Correct 80 ms 12092 KB Output is correct
83 Correct 85 ms 12080 KB Output is correct
84 Correct 104 ms 12080 KB Output is correct
85 Correct 82 ms 12088 KB Output is correct
86 Correct 87 ms 12108 KB Output is correct
87 Correct 94 ms 12068 KB Output is correct
88 Correct 103 ms 12076 KB Output is correct
89 Correct 100 ms 12128 KB Output is correct
90 Correct 98 ms 12056 KB Output is correct
91 Correct 90 ms 12088 KB Output is correct
92 Correct 96 ms 12056 KB Output is correct