oj.uz

Submission #341026

# Submission time Handle Problem Language Result Execution time Memory
341026 2020-12-28T22:26:08 Z peuch Mecho (IOI09_mecho) C++17
22 / 100
 279 ms 10988 KB 
#include<bits/stdc++.h>
using namespace std;
 
const int MAXN = 1010;
 
int dx[4] = {0, 1, 0, -1};
int dy[4] = {1, 0, -1, 0};
 
int n, s;
int hx, hy;
int mx, my;
char grid[MAXN][MAXN];
int beeDist[MAXN][MAXN];
int marc[MAXN][MAXN];
int dist[MAXN][MAXN];
 
void preCalc();
bool test(int temp);
int bb();
 
int main(){
	scanf("%d %d", &n, &s);
	for(int i = 1; i <= n; i++){
		for(int j = 1; j <= n; j++){
			scanf(" %c", &grid[i][j]);
			if(grid[i][j] == 'D') hx = i, hy = j;
			if(grid[i][j] == 'M') mx = i, my = j;
		}
	}
	preCalc();
	printf("%d\n", bb());
}
 
void preCalc(){
	queue<int> fila;
	for(int i = 1; i <= n; i++){
		for(int j = 1; j <= n; j++){
			if(grid[i][j] != 'H') beeDist[i][j] = 1e8;
			else{
				marc[i][j] = 1;
				fila.push(i);
				fila.push(j);
			}
		}
	}
	while(!fila.empty()){
		int curx = fila.front();
		fila.pop();
		int cury = fila.front();
		fila.pop();
		for(int i = 0; i < 4; i++){
			int vizx = curx + dx[i];
			int vizy = cury + dy[i];
			if(vizx <= 0 || vizx > n) continue;
			if(vizy <= 0 || vizy > n) continue;
			if(grid[vizx][vizy] == 'T') continue;
			if(grid[vizx][vizy] == 'D') continue;
			if(marc[vizx][vizy]) continue;
			marc[vizx][vizy] = 1;
			beeDist[vizx][vizy] = beeDist[curx][cury] + 1;
			fila.push(vizx);
			fila.push(vizy);
		}
	}
}
 
bool test(int temp){
	queue<int> fila;
	for(int i = 1; i <= n; i++){
		for(int j = 1; j <= n; j++){
			marc[i][j] = 0;
			dist[i][j] = 0;
		}
	}
	fila.push(mx);
	fila.push(my);
	marc[mx][my] = 1;
	dist[mx][my] = 0;
	while(!fila.empty()){
		int curx = fila.front();
		fila.pop();
		int cury = fila.front();
		fila.pop();
		for(int i = 0; i < 4; i++){
			int vizx = curx + dx[i];
			int vizy = cury + dy[i];
			if(vizx <= 0 || vizx > n) continue;
			if(vizy <= 0 || vizy > n) continue;
			if(grid[vizx][vizy] == 'T') continue;
			if(temp + 1 + dist[curx][cury] / s >= beeDist[vizx][vizy]) continue;
			if(marc[vizx][vizy]) continue;
			marc[vizx][vizy] = 1;
			dist[vizx][vizy] = dist[curx][cury] + 1;
			fila.push(vizx);
			fila.push(vizy);
		}
	}
	return marc[hx][hy];
}
 
int bb(){
	int ini = 0, fim = 1e8 + 10;
	if(!test(ini)) return -1;
	while(ini != fim){
		int mid = (ini + fim) >> 1;
		if(ini == fim - 1) mid = fim;
		if(test(mid)) ini = mid;
		else fim = mid - 1;
	}
	return ini;
}

Compilation message

mecho.cpp: In function 'int main()':
mecho.cpp:22:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   22 |  scanf("%d %d", &n, &s);
      |  ~~~~~^~~~~~~~~~~~~~~~~
mecho.cpp:25:9: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   25 |    scanf(" %c", &grid[i][j]);
      |    ~~~~~^~~~~~~~~~~~~~~~~~~~

Subtask #1
22.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Incorrect 1 ms 492 KB Output isn't correct
6 Incorrect 1 ms 492 KB Output isn't correct
7 Incorrect 190 ms 10732 KB Output isn't correct
8 Correct 1 ms 492 KB Output is correct
9 Incorrect 1 ms 492 KB Output isn't correct
10 Incorrect 1 ms 492 KB Output isn't correct
11 Incorrect 1 ms 492 KB Output isn't correct
12 Incorrect 1 ms 1132 KB Output isn't correct
13 Correct 1 ms 1004 KB Output is correct
14 Correct 1 ms 1132 KB Output is correct
15 Correct 1 ms 620 KB Output is correct
16 Incorrect 1 ms 620 KB Output isn't correct
17 Correct 1 ms 620 KB Output is correct
18 Incorrect 1 ms 620 KB Output isn't correct
19 Correct 1 ms 748 KB Output is correct
20 Incorrect 1 ms 748 KB Output isn't correct
21 Correct 1 ms 876 KB Output is correct
22 Incorrect 1 ms 876 KB Output isn't correct
23 Correct 1 ms 1004 KB Output is correct
24 Incorrect 1 ms 1004 KB Output isn't correct
25 Correct 1 ms 1132 KB Output is correct
26 Incorrect 1 ms 1132 KB Output isn't correct
27 Correct 2 ms 1132 KB Output is correct
28 Incorrect 2 ms 1132 KB Output isn't correct
29 Correct 2 ms 1260 KB Output is correct
30 Incorrect 2 ms 1260 KB Output isn't correct
31 Correct 2 ms 1260 KB Output is correct
32 Incorrect 2 ms 1260 KB Output isn't correct
33 Correct 16 ms 4844 KB Output is correct
34 Incorrect 16 ms 4844 KB Output isn't correct
35 Incorrect 38 ms 4844 KB Output isn't correct
36 Correct 20 ms 5484 KB Output is correct
37 Incorrect 21 ms 5484 KB Output isn't correct
38 Incorrect 53 ms 5484 KB Output isn't correct
39 Correct 24 ms 6124 KB Output is correct
40 Incorrect 25 ms 6124 KB Output isn't correct
41 Incorrect 69 ms 6124 KB Output isn't correct
42 Correct 30 ms 6764 KB Output is correct
43 Incorrect 33 ms 6764 KB Output isn't correct
44 Incorrect 87 ms 6764 KB Output isn't correct
45 Correct 39 ms 7404 KB Output is correct
46 Incorrect 38 ms 7532 KB Output isn't correct
47 Incorrect 111 ms 7404 KB Output isn't correct
48 Correct 43 ms 8044 KB Output is correct
49 Incorrect 46 ms 8044 KB Output isn't correct
50 Incorrect 142 ms 8172 KB Output isn't correct
51 Correct 54 ms 8684 KB Output is correct
52 Incorrect 51 ms 8684 KB Output isn't correct
53 Incorrect 171 ms 8812 KB Output isn't correct
54 Correct 58 ms 9324 KB Output is correct
55 Incorrect 62 ms 9324 KB Output isn't correct
56 Incorrect 201 ms 9324 KB Output isn't correct
57 Correct 67 ms 9996 KB Output is correct
58 Incorrect 71 ms 9964 KB Output isn't correct
59 Incorrect 222 ms 9964 KB Output isn't correct
60 Correct 74 ms 10604 KB Output is correct
61 Incorrect 78 ms 10604 KB Output isn't correct
62 Incorrect 279 ms 10732 KB Output isn't correct
63 Incorrect 71 ms 10604 KB Output isn't correct
64 Incorrect 227 ms 10732 KB Output isn't correct
65 Incorrect 227 ms 10604 KB Output isn't correct
66 Correct 207 ms 10604 KB Output is correct
67 Correct 75 ms 10604 KB Output is correct
68 Incorrect 74 ms 10604 KB Output isn't correct
69 Incorrect 109 ms 10824 KB Output isn't correct
70 Incorrect 99 ms 10604 KB Output isn't correct
71 Incorrect 99 ms 10604 KB Output isn't correct
72 Correct 95 ms 10732 KB Output is correct
73 Correct 108 ms 10860 KB Output is correct
74 Incorrect 162 ms 10864 KB Output isn't correct
75 Incorrect 168 ms 10988 KB Output isn't correct
76 Incorrect 154 ms 10988 KB Output isn't correct
77 Incorrect 156 ms 10860 KB Output isn't correct
78 Correct 73 ms 10860 KB Output is correct
79 Incorrect 162 ms 10860 KB Output isn't correct
80 Incorrect 149 ms 10860 KB Output isn't correct
81 Incorrect 154 ms 10860 KB Output isn't correct
82 Incorrect 149 ms 10988 KB Output isn't correct
83 Incorrect 75 ms 10988 KB Output isn't correct
84 Incorrect 179 ms 10860 KB Output isn't correct
85 Incorrect 187 ms 10988 KB Output isn't correct
86 Incorrect 163 ms 10860 KB Output isn't correct
87 Incorrect 186 ms 10860 KB Output isn't correct
88 Incorrect 79 ms 10732 KB Output isn't correct
89 Incorrect 191 ms 10732 KB Output isn't correct
90 Incorrect 193 ms 10732 KB Output isn't correct
91 Incorrect 188 ms 10732 KB Output isn't correct
92 Incorrect 186 ms 10732 KB Output isn't correct