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Submission #947243

# Submission time Handle Problem Language Result Execution time Memory
947243 2024-03-15T18:33:09 Z narsuk Mecho (IOI09_mecho) C++17
73 / 100
 658 ms 10524 KB 
#include <bits/stdc++.h>
using namespace std;
//
#define ll long long int
 
#define endl "\n"; 
 
const int maxn = 801;

// array<int,n>
// pq 


int n,st;

pair<int,int>mv[4]={ {0,1},{0,-1} , {1,0}, {-1,0} };

char g[maxn][maxn];
char g1[maxn][maxn];
char g2[maxn][maxn];

bool val(int x , int y){
	if(x<0 || x>=n || y<0 || y>=n || g[x][y]=='T' )return 0;
	return 1;
}
 

int xc,yc;
int xcc;
int ycc;
int beetime[maxn][maxn];

void bbfs(){
	int vis[n][n];
	queue<pair<pair<int,int>,int>>q;
	for(int i=0;i<n;i++){
		for(int j=0;j<n;j++){
			beetime[i][j]=INT_MAX;
			if(g1[i][j]=='H'){
				q.push({{i,j},0}); 
			}
			vis[i][j]=0;
		}
	}
	while(!q.empty()){
		pair<int,int>cur;
		cur=q.front().first;
		int dt = q.front().second;
		q.pop();
		if(vis[cur.first][cur.second])continue;
		vis[cur.first][cur.second]=1;

		if(g1[cur.first][cur.second]=='D' || g1[cur.first][cur.second]=='T'){
			continue;
		} 
		beetime[cur.first][cur.second]=dt;
		// cout<<cur.first<<" "<<cur.second<<endl;
		for(auto ele : mv){
			int xx = cur.first+ele.first;
			int yy = cur.second+ele.second;
			if(val(xx,yy)){
				q.push({{xx,yy},dt+1});
			}
		}
	}

}




// int mbfs(int x){
bool tme(int marc , int bee){
	int ccur = marc/st;
	// if(ccur*st!=marc){
	// 	return (marc/st)-1<bee;
	// }
	return marc/st <bee;
}

 

bool check(int x){

	bbfs();


	queue<pair<pair<int,int>,int>>q;
	bool vis[n][n];
	int dist[n][n];
	for(int i=0;i<n;i++){
		for(int j=0;j<n;j++){
			vis[i][j]=0;
			dist[i][j]=INT_MAX;
		}
	}

	q.push({{xc,yc},0});
	while(!q.empty()){
		pair<int,int>cur=q.front().first;
		int dt = q.front().second;
		dist[cur.first][cur.second]=dt;
		q.pop();
		if(vis[cur.first][cur.second])continue;
		vis[cur.first][cur.second]=1;

		for(auto ele :mv){
			int xx = cur.first+ele.first;
			int yy = cur.second+ele.second;

			if(val(xx,yy) && !vis[xx][yy] && tme(dt+1 , beetime[xx][yy]-x) && g[xx][yy]!='H'){
				q.push({{xx,yy} , dt+1});
			}
		}

	}
	// for(int i=0;i<n;i++){
	// 	for(int j=0;j<n;j++){
	// 		cout<<vis[i][j]<<" ";
	// 	}
	// 	cout<<endl;
	// }

	for(auto ele : mv){
		int xx = xcc+ele.first;
		int yy = ycc+ele.second;

		if(val(xx,yy) && vis[xx][yy]==1 && tme(dist[xx][yy] ,beetime[xx][yy]-x)){
		// cout<<xx<<" "<<yy<<endl;
			return 1;
		}
	}

	return 0;
}

void solu(){
	cin>>n>>st;
	for(int i=0;i<n;i++){
		for(int j=0;j<n;j++){
			cin>>g[i][j];
			g1[i][j]=g[i][j];
			if(g[i][j]=='M'){
				xc=i;
				yc=j;
			}
			if(g[i][j]=='D'){
				xcc = i;
				ycc = j;
			}
		}
	}
	// cout<<endl;
	int l=0;
	int r = 1e6;
	int ans=0;
	while(l<r){
		int mid = l + (r-l+1)/2;
		// cout<<mid<<endl;
		if(check(mid)){
			ans=max(mid,ans);
			l=mid;
		}else{
			r=mid-1;
		}
	}
	// cout<<check(2)<<endl;
	cout<<ans<<endl;


}
int main(){
		// ios_base::sync_with_stdio(0);
		// cin.tie(0);
		// int cass;
		// cin>>cass; 
		// for(int i=0;i<cass;i++)
		solu();
    return 0;
}

Compilation message

mecho.cpp: In function 'bool tme(int, int)':
mecho.cpp:74:6: warning: unused variable 'ccur' [-Wunused-variable]
   74 |  int ccur = marc/st;
      |      ^~~~

Subtask #1
73.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 0 ms 2396 KB Output is correct
3 Correct 0 ms 2396 KB Output is correct
4 Correct 1 ms 2396 KB Output is correct
5 Correct 1 ms 2396 KB Output is correct
6 Correct 1 ms 2396 KB Output is correct
7 Correct 617 ms 8640 KB Output is correct
8 Incorrect 1 ms 2392 KB Output isn't correct
9 Correct 1 ms 2396 KB Output is correct
10 Correct 1 ms 2396 KB Output is correct
11 Correct 1 ms 2652 KB Output is correct
12 Correct 2 ms 4700 KB Output is correct
13 Incorrect 3 ms 2676 KB Output isn't correct
14 Incorrect 4 ms 4700 KB Output isn't correct
15 Correct 1 ms 2396 KB Output is correct
16 Correct 1 ms 2396 KB Output is correct
17 Correct 1 ms 2648 KB Output is correct
18 Correct 1 ms 2396 KB Output is correct
19 Correct 1 ms 2396 KB Output is correct
20 Correct 1 ms 2396 KB Output is correct
21 Correct 1 ms 2396 KB Output is correct
22 Correct 1 ms 2396 KB Output is correct
23 Correct 1 ms 2652 KB Output is correct
24 Correct 1 ms 2560 KB Output is correct
25 Correct 2 ms 4700 KB Output is correct
26 Correct 2 ms 4700 KB Output is correct
27 Correct 2 ms 4728 KB Output is correct
28 Correct 2 ms 4696 KB Output is correct
29 Correct 3 ms 4700 KB Output is correct
30 Correct 2 ms 4700 KB Output is correct
31 Correct 3 ms 4700 KB Output is correct
32 Correct 3 ms 4700 KB Output is correct
33 Correct 38 ms 5284 KB Output is correct
34 Correct 35 ms 5212 KB Output is correct
35 Correct 79 ms 5400 KB Output is correct
36 Correct 47 ms 5456 KB Output is correct
37 Correct 43 ms 5468 KB Output is correct
38 Correct 113 ms 5576 KB Output is correct
39 Correct 56 ms 5724 KB Output is correct
40 Correct 56 ms 5660 KB Output is correct
41 Correct 131 ms 5868 KB Output is correct
42 Correct 76 ms 5976 KB Output is correct
43 Correct 68 ms 5976 KB Output is correct
44 Correct 168 ms 5968 KB Output is correct
45 Correct 89 ms 6240 KB Output is correct
46 Correct 79 ms 6232 KB Output is correct
47 Correct 205 ms 6436 KB Output is correct
48 Correct 107 ms 6692 KB Output is correct
49 Correct 100 ms 6736 KB Output is correct
50 Correct 242 ms 6688 KB Output is correct
51 Correct 126 ms 7076 KB Output is correct
52 Correct 119 ms 7024 KB Output is correct
53 Correct 292 ms 7116 KB Output is correct
54 Correct 144 ms 7408 KB Output is correct
55 Correct 133 ms 7516 KB Output is correct
56 Correct 331 ms 7484 KB Output is correct
57 Correct 168 ms 7844 KB Output is correct
58 Correct 154 ms 7884 KB Output is correct
59 Correct 392 ms 7920 KB Output is correct
60 Correct 179 ms 8364 KB Output is correct
61 Correct 164 ms 8344 KB Output is correct
62 Correct 431 ms 8276 KB Output is correct
63 Correct 415 ms 8344 KB Output is correct
64 Correct 506 ms 8320 KB Output is correct
65 Correct 476 ms 8164 KB Output is correct
66 Correct 464 ms 8276 KB Output is correct
67 Incorrect 426 ms 8360 KB Output isn't correct
68 Correct 416 ms 8532 KB Output is correct
69 Correct 432 ms 8276 KB Output is correct
70 Correct 435 ms 8288 KB Output is correct
71 Correct 439 ms 8460 KB Output is correct
72 Incorrect 423 ms 8460 KB Output isn't correct
73 Incorrect 592 ms 10040 KB Output isn't correct
74 Correct 628 ms 10024 KB Output is correct
75 Correct 650 ms 10524 KB Output is correct
76 Correct 658 ms 10144 KB Output is correct
77 Correct 653 ms 10044 KB Output is correct
78 Incorrect 580 ms 9920 KB Output isn't correct
79 Correct 614 ms 10004 KB Output is correct
80 Correct 610 ms 9988 KB Output is correct
81 Correct 603 ms 9952 KB Output is correct
82 Correct 586 ms 9828 KB Output is correct
83 Correct 587 ms 9828 KB Output is correct
84 Correct 601 ms 9680 KB Output is correct
85 Correct 625 ms 9768 KB Output is correct
86 Correct 614 ms 9552 KB Output is correct
87 Correct 615 ms 9864 KB Output is correct
88 Correct 611 ms 9588 KB Output is correct
89 Correct 618 ms 9296 KB Output is correct
90 Correct 636 ms 9340 KB Output is correct
91 Correct 609 ms 9320 KB Output is correct
92 Correct 627 ms 9344 KB Output is correct