oj.uz

Submission #341027

# Submission time Handle Problem Language Result Execution time Memory
341027 2020-12-28T22:26:46 Z peuch Mecho (IOI09_mecho) C++17
38 / 100
 256 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
38.0 / 100.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 500 KB Output isn't correct
2 Incorrect 1 ms 364 KB Output isn't correct
3 Incorrect 1 ms 364 KB Output isn't correct
4 Incorrect 1 ms 364 KB Output isn't correct
5 Correct 1 ms 492 KB Output is correct
6 Correct 1 ms 492 KB Output is correct
7 Correct 215 ms 10732 KB Output is correct
8 Incorrect 1 ms 492 KB Output isn't correct
9 Correct 1 ms 492 KB Output is correct
10 Correct 1 ms 492 KB Output is correct
11 Correct 1 ms 492 KB Output is correct
12 Incorrect 1 ms 1132 KB Output isn't correct
13 Incorrect 1 ms 1004 KB Output isn't correct
14 Correct 1 ms 1132 KB Output is correct
15 Incorrect 1 ms 620 KB Output isn't correct
16 Correct 1 ms 620 KB Output is correct
17 Incorrect 1 ms 620 KB Output isn't correct
18 Correct 1 ms 620 KB Output is correct
19 Incorrect 1 ms 748 KB Output isn't correct
20 Correct 1 ms 748 KB Output is correct
21 Incorrect 1 ms 876 KB Output isn't correct
22 Correct 1 ms 876 KB Output is correct
23 Incorrect 1 ms 1004 KB Output isn't correct
24 Correct 1 ms 1004 KB Output is correct
25 Incorrect 1 ms 1132 KB Output isn't correct
26 Correct 1 ms 1132 KB Output is correct
27 Incorrect 1 ms 1132 KB Output isn't correct
28 Correct 1 ms 1132 KB Output is correct
29 Incorrect 2 ms 1260 KB Output isn't correct
30 Correct 2 ms 1260 KB Output is correct
31 Incorrect 2 ms 1260 KB Output isn't correct
32 Correct 2 ms 1260 KB Output is correct
33 Incorrect 16 ms 4844 KB Output isn't correct
34 Correct 19 ms 4972 KB Output is correct
35 Correct 44 ms 4844 KB Output is correct
36 Incorrect 20 ms 5484 KB Output isn't correct
37 Correct 21 ms 5484 KB Output is correct
38 Correct 48 ms 5484 KB Output is correct
39 Incorrect 25 ms 6124 KB Output isn't correct
40 Correct 31 ms 6124 KB Output is correct
41 Correct 65 ms 6124 KB Output is correct
42 Incorrect 31 ms 6892 KB Output isn't correct
43 Correct 31 ms 6784 KB Output is correct
44 Correct 89 ms 6764 KB Output is correct
45 Incorrect 37 ms 7404 KB Output isn't correct
46 Correct 39 ms 7404 KB Output is correct
47 Correct 110 ms 7404 KB Output is correct
48 Incorrect 44 ms 8044 KB Output isn't correct
49 Correct 47 ms 8044 KB Output is correct
50 Correct 129 ms 8044 KB Output is correct
51 Incorrect 49 ms 8684 KB Output isn't correct
52 Correct 55 ms 8812 KB Output is correct
53 Correct 155 ms 8812 KB Output is correct
54 Incorrect 58 ms 9324 KB Output isn't correct
55 Correct 60 ms 9324 KB Output is correct
56 Correct 184 ms 9324 KB Output is correct
57 Incorrect 67 ms 10092 KB Output isn't correct
58 Correct 74 ms 10092 KB Output is correct
59 Correct 211 ms 9964 KB Output is correct
60 Incorrect 73 ms 10732 KB Output isn't correct
61 Correct 78 ms 10732 KB Output is correct
62 Correct 256 ms 10604 KB Output is correct
63 Correct 164 ms 10604 KB Output is correct
64 Correct 250 ms 10732 KB Output is correct
65 Correct 248 ms 10604 KB Output is correct
66 Incorrect 222 ms 10732 KB Output isn't correct
67 Correct 90 ms 10752 KB Output is correct
68 Correct 105 ms 10604 KB Output is correct
69 Correct 112 ms 10732 KB Output is correct
70 Correct 106 ms 10604 KB Output is correct
71 Correct 107 ms 10604 KB Output is correct
72 Incorrect 98 ms 10604 KB Output isn't correct
73 Incorrect 122 ms 10988 KB Output isn't correct
74 Correct 170 ms 10860 KB Output is correct
75 Correct 208 ms 10860 KB Output is correct
76 Correct 143 ms 10860 KB Output is correct
77 Correct 159 ms 10860 KB Output is correct
78 Correct 74 ms 10860 KB Output is correct
79 Correct 156 ms 10860 KB Output is correct
80 Correct 164 ms 10860 KB Output is correct
81 Correct 163 ms 10988 KB Output is correct
82 Correct 157 ms 10860 KB Output is correct
83 Correct 155 ms 10860 KB Output is correct
84 Correct 183 ms 10860 KB Output is correct
85 Correct 152 ms 10860 KB Output is correct
86 Correct 164 ms 10860 KB Output is correct
87 Correct 215 ms 10860 KB Output is correct
88 Correct 163 ms 10732 KB Output is correct
89 Correct 199 ms 10732 KB Output is correct
90 Correct 193 ms 10932 KB Output is correct
91 Correct 188 ms 10732 KB Output is correct
92 Correct 182 ms 10732 KB Output is correct