oj.uz

Submission #341035

# Submission time Handle Problem Language Result Execution time Memory
341035 2020-12-28T22:51:44 Z peuch Mecho (IOI09_mecho) C++17
100 / 100
 281 ms 17388 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;
long long s;
int hx, hy;
int mx, my;
char grid[MAXN][MAXN];
long long beeDist[MAXN][MAXN];
int marc[MAXN][MAXN];
long long dist[MAXN][MAXN];
 
void preCalc();
bool test(long long temp);
long long bb();
 
int main(){
	scanf("%d %lld", &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] = 1e18;
			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] + s;
			fila.push(vizx);
			fila.push(vizy);
		}
	}
}
 
bool test(long long 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] = temp * s;
	if(dist[mx][my] >= beeDist[mx][my]) return 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(dist[curx][cury] + 1 >= 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];
}
 
long long bb(){
	long long ini = 0, fim = 2e8 + 10;
	if(!test(ini)) return -1;
	while(ini != fim){
		long long 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:32:11: warning: format '%d' expects argument of type 'int', but argument 2 has type 'long long int' [-Wformat=]
   32 |  printf("%d\n", bb());
      |          ~^     ~~~~
      |           |       |
      |           int     long long int
      |          %lld
mecho.cpp:23:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   23 |  scanf("%d %lld", &n, &s);
      |  ~~~~~^~~~~~~~~~~~~~~~~~~
mecho.cpp:26:9: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   26 |    scanf(" %c", &grid[i][j]);
      |    ~~~~~^~~~~~~~~~~~~~~~~~~~

Subtask #1
100.0 / 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 Correct 1 ms 492 KB Output is correct
6 Correct 1 ms 492 KB Output is correct
7 Correct 237 ms 17004 KB Output is correct
8 Correct 1 ms 620 KB Output is correct
9 Correct 1 ms 492 KB Output is correct
10 Correct 1 ms 512 KB Output is correct
11 Correct 1 ms 492 KB Output is correct
12 Correct 1 ms 1132 KB Output is 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 Correct 1 ms 620 KB Output is correct
17 Correct 1 ms 620 KB Output is correct
18 Correct 1 ms 620 KB Output is correct
19 Correct 1 ms 748 KB Output is correct
20 Correct 2 ms 748 KB Output is correct
21 Correct 1 ms 876 KB Output is correct
22 Correct 1 ms 876 KB Output is correct
23 Correct 1 ms 1004 KB Output is correct
24 Correct 1 ms 1004 KB Output is correct
25 Correct 1 ms 1132 KB Output is correct
26 Correct 1 ms 1132 KB Output is correct
27 Correct 1 ms 1260 KB Output is correct
28 Correct 2 ms 1260 KB Output is correct
29 Correct 2 ms 1260 KB Output is correct
30 Correct 2 ms 1260 KB Output is correct
31 Correct 2 ms 1388 KB Output is correct
32 Correct 2 ms 1388 KB Output is correct
33 Correct 17 ms 6892 KB Output is correct
34 Correct 18 ms 6764 KB Output is correct
35 Correct 38 ms 6764 KB Output is correct
36 Correct 21 ms 8044 KB Output is correct
37 Correct 24 ms 8044 KB Output is correct
38 Correct 56 ms 8044 KB Output is correct
39 Correct 27 ms 9324 KB Output is correct
40 Correct 31 ms 9324 KB Output is correct
41 Correct 74 ms 9324 KB Output is correct
42 Correct 33 ms 10732 KB Output is correct
43 Correct 35 ms 10772 KB Output is correct
44 Correct 91 ms 10732 KB Output is correct
45 Correct 39 ms 11756 KB Output is correct
46 Correct 42 ms 11756 KB Output is correct
47 Correct 125 ms 11756 KB Output is correct
48 Correct 48 ms 12780 KB Output is correct
49 Correct 52 ms 12780 KB Output is correct
50 Correct 136 ms 12908 KB Output is correct
51 Correct 58 ms 13804 KB Output is correct
52 Correct 62 ms 13804 KB Output is correct
53 Correct 164 ms 13804 KB Output is correct
54 Correct 67 ms 14828 KB Output is correct
55 Correct 70 ms 14828 KB Output is correct
56 Correct 193 ms 14828 KB Output is correct
57 Correct 78 ms 15852 KB Output is correct
58 Correct 85 ms 15852 KB Output is correct
59 Correct 223 ms 15852 KB Output is correct
60 Correct 93 ms 17004 KB Output is correct
61 Correct 93 ms 17004 KB Output is correct
62 Correct 281 ms 17132 KB Output is correct
63 Correct 182 ms 17004 KB Output is correct
64 Correct 251 ms 17004 KB Output is correct
65 Correct 271 ms 17004 KB Output is correct
66 Correct 228 ms 17004 KB Output is correct
67 Correct 78 ms 17004 KB Output is correct
68 Correct 123 ms 17028 KB Output is correct
69 Correct 132 ms 17004 KB Output is correct
70 Correct 124 ms 17004 KB Output is correct
71 Correct 120 ms 17004 KB Output is correct
72 Correct 117 ms 17004 KB Output is correct
73 Correct 131 ms 17260 KB Output is correct
74 Correct 187 ms 17388 KB Output is correct
75 Correct 171 ms 17260 KB Output is correct
76 Correct 168 ms 17388 KB Output is correct
77 Correct 180 ms 17388 KB Output is correct
78 Correct 84 ms 17132 KB Output is correct
79 Correct 177 ms 17260 KB Output is correct
80 Correct 170 ms 17132 KB Output is correct
81 Correct 182 ms 17260 KB Output is correct
82 Correct 157 ms 17132 KB Output is correct
83 Correct 182 ms 17388 KB Output is correct
84 Correct 221 ms 17128 KB Output is correct
85 Correct 180 ms 17132 KB Output is correct
86 Correct 194 ms 17240 KB Output is correct
87 Correct 216 ms 17388 KB Output is correct
88 Correct 187 ms 17260 KB Output is correct
89 Correct 221 ms 17132 KB Output is correct
90 Correct 213 ms 17260 KB Output is correct
91 Correct 215 ms 17164 KB Output is correct
92 Correct 205 ms 17260 KB Output is correct