oj.uz

Submission #341020

# Submission time Handle Problem Language Result Execution time Memory
341020 2020-12-28T22:20:06 Z peuch Mecho (IOI09_mecho) C++17
7 / 100
 1000 ms 17408 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("%lld\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] = 2e18;
			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(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;
	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] + s) / 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];
}

long long bb(){
	long long ini = 0, fim = 1e18 + 10;
	if(!test(fim)) 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: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
7.0 / 100.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 364 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 Incorrect 1 ms 492 KB Output isn't correct
6 Incorrect 1 ms 492 KB Output isn't correct
7 Incorrect 65 ms 17004 KB Output isn't correct
8 Correct 1 ms 492 KB Output is correct
9 Correct 1 ms 492 KB Output is correct
10 Incorrect 1 ms 492 KB Output isn't correct
11 Incorrect 1 ms 492 KB Output isn't correct
12 Incorrect 2 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 768 KB Output is correct
21 Incorrect 1 ms 876 KB Output isn't correct
22 Incorrect 1 ms 876 KB Output isn't correct
23 Incorrect 1 ms 1004 KB Output isn't correct
24 Incorrect 1 ms 1004 KB Output isn't correct
25 Incorrect 1 ms 1132 KB Output isn't correct
26 Incorrect 3 ms 1132 KB Output isn't correct
27 Incorrect 1 ms 1260 KB Output isn't correct
28 Incorrect 3 ms 1260 KB Output isn't correct
29 Incorrect 1 ms 1260 KB Output isn't correct
30 Incorrect 3 ms 1260 KB Output isn't correct
31 Incorrect 3 ms 1388 KB Output isn't correct
32 Incorrect 2 ms 1388 KB Output isn't correct
33 Incorrect 12 ms 6764 KB Output isn't correct
34 Incorrect 73 ms 6860 KB Output isn't correct
35 Incorrect 135 ms 6764 KB Output isn't correct
36 Incorrect 16 ms 8044 KB Output isn't correct
37 Incorrect 82 ms 8172 KB Output isn't correct
38 Incorrect 190 ms 8172 KB Output isn't correct
39 Incorrect 19 ms 9324 KB Output isn't correct
40 Incorrect 23 ms 9324 KB Output isn't correct
41 Incorrect 23 ms 9472 KB Output isn't correct
42 Incorrect 23 ms 10732 KB Output isn't correct
43 Incorrect 116 ms 10732 KB Output isn't correct
44 Incorrect 26 ms 10732 KB Output isn't correct
45 Incorrect 37 ms 11884 KB Output isn't correct
46 Incorrect 172 ms 11756 KB Output isn't correct
47 Incorrect 477 ms 11884 KB Output isn't correct
48 Incorrect 32 ms 12780 KB Output isn't correct
49 Incorrect 31 ms 12780 KB Output isn't correct
50 Incorrect 487 ms 12864 KB Output isn't correct
51 Incorrect 36 ms 13804 KB Output isn't correct
52 Incorrect 215 ms 13804 KB Output isn't correct
53 Incorrect 44 ms 13804 KB Output isn't correct
54 Incorrect 41 ms 14828 KB Output isn't correct
55 Incorrect 42 ms 14828 KB Output isn't correct
56 Incorrect 794 ms 15032 KB Output isn't correct
57 Incorrect 47 ms 15980 KB Output isn't correct
58 Incorrect 47 ms 15852 KB Output isn't correct
59 Incorrect 849 ms 15980 KB Output isn't correct
60 Incorrect 55 ms 17004 KB Output isn't correct
61 Incorrect 368 ms 17004 KB Output isn't correct
62 Incorrect 69 ms 17004 KB Output isn't correct
63 Incorrect 66 ms 17004 KB Output isn't correct
64 Incorrect 944 ms 17004 KB Output isn't correct
65 Incorrect 70 ms 17004 KB Output isn't correct
66 Incorrect 78 ms 17004 KB Output isn't correct
67 Correct 67 ms 17004 KB Output is correct
68 Incorrect 73 ms 17132 KB Output isn't correct
69 Incorrect 767 ms 17004 KB Output isn't correct
70 Incorrect 75 ms 17004 KB Output isn't correct
71 Correct 188 ms 17004 KB Output is correct
72 Incorrect 659 ms 17132 KB Output isn't correct
73 Incorrect 78 ms 17260 KB Output isn't correct
74 Incorrect 83 ms 17408 KB Output isn't correct
75 Correct 274 ms 17280 KB Output is correct
76 Incorrect 83 ms 17260 KB Output isn't correct
77 Incorrect 82 ms 17260 KB Output isn't correct
78 Incorrect 259 ms 17388 KB Output isn't correct
79 Execution timed out 1094 ms 17260 KB Time limit exceeded
80 Correct 257 ms 17368 KB Output is correct
81 Incorrect 69 ms 17132 KB Output isn't correct
82 Incorrect 69 ms 17132 KB Output isn't correct
83 Correct 279 ms 17260 KB Output is correct
84 Incorrect 68 ms 17132 KB Output isn't correct
85 Incorrect 73 ms 17132 KB Output isn't correct
86 Correct 284 ms 17172 KB Output is correct
87 Incorrect 67 ms 17132 KB Output isn't correct
88 Incorrect 67 ms 17132 KB Output isn't correct
89 Execution timed out 1096 ms 17124 KB Time limit exceeded
90 Incorrect 68 ms 17132 KB Output isn't correct
91 Execution timed out 1079 ms 17132 KB Time limit exceeded
92 Execution timed out 1090 ms 17132 KB Time limit exceeded