oj.uz

Submission #777237

# Submission time Handle Problem Language Result Execution time Memory
777237 2023-07-08T20:00:39 Z _ZeyadRafat Mecho (IOI09_mecho) C++14
89 / 100
 505 ms 6604 KB 
#include <bits/stdc++.h>
using namespace std;

long long  gcd(long long a, long long b){
    if(b == 0) return a;
    return gcd(b, a % b);
}
long long _gcd(long long n1,long long n2)
{  while (n2!=0){
        long long temp=n1;
        n1=n2;
        n2=temp%n1;
    }
    return n1;
}
long long _lcm(long long n1,long long n2){
    return (n1/ _gcd(n1,n2))*n2;
}

bool prime(long long n){
    if(n==2)return true;
    if(n<2||n%2==0)return false;
    int d= sqrtl(n);
    for(int i=3;i<= d;i+=2)
        if(n%i==0)return false;
    return true;
}

string to_binary(long long x){
    string s="";
    while(x){
        int d=x%2;
        char c=d+'0';
        s+=c;
        x/=2;
    }
    return s;
}
long long to_dec(string s){
    long long su=0;


    int d=0;

    for(long long  i=0;i<(s.size());i++){
        if(s[i]=='0')continue;
        long long q= round(pow(2LL,i));
        su+=q;
    }
    return su;
}
bool com(pair<long long ,long long >&x,pair<long long ,long long >&y){
	if(x.first!=y.first)return x.first>y.first;
	return x.second<y.second;
}
void Nozarashi(){
	long long n,k;
	cin>>n>>k;
	vector<string>grid;
	for(int i=0;i<n;i++){
		string s;
		cin>>s;
		grid.push_back(s);
	}
	long long s1,s2;
	for(int i=0;i<int(grid.size());i++){
		for(int j=0;j<int(grid[i].size());j++){
			if(grid[i][j]=='M'){
             s1=i;
             s2=j;
			}

		}
	}
	function<bool(int ,int,int,int)>in_range=[&](int i,int j,int n,int m){
		if(i>=0&&i<n&&j>=0&&j<m)return true;
		return false;
	};
   function<bool(long long ) >bfs=[&](long long mi){
   long long visted[n+3][n+3];
   memset(visted,0,sizeof(visted));
   queue<pair<int,int> >qe;
   for(int i=0;i<n;i++){
   	for(int j=0;j<n;j++){
   		if(grid[i][j]=='H'){qe.push({i,j});
   		   		visted[i][j]=true;}
   	}
   }
   int level=0;
   while(!qe.empty()){
   	if(level==mi)break;
   	long long sz=qe.size();
   	for(int d=0;d<sz;d++){
   		long long i=qe.front().first;
   		long long j=qe.front().second;

   		qe.pop();
   		for(int I=-1;I<=1;I++){
   			for(int J=-1;J<=1;J++){
   				if(abs(I)==abs(J))continue;
   				long long t1=i+I;
   				long long t2=j+J;
   				if(!in_range(t1,t2,n,n))continue;
   				if(visted[t1][t2])continue;
   				if(grid[t1][t2]=='M'){
   					return false;
   				}
   				if(grid[t1][t2]=='D')continue;
   				if(grid[t1][t2]=='T')continue;
   				qe.push({t1,t2});
   				visted[t1][t2]=true;
   			}
   		}
   	}
   	level++;
   }
   level=0;
   queue<pair<int,int > >qem;
   qem.push({s1,s2});
   visted[s1][s2]=true;

   while(!qem.empty()||!qe.empty()){

   	long long sz=qe.size();
   	if((level+1)%k==0){
   	for(int d=0;d<sz;d++){
   		long long i=qe.front().first;
   		long long j=qe.front().second;
   		qe.pop();

   		for(int I=-1;I<=1;I++){
   			for(int J=-1;J<=1;J++){
   				if(abs(I)==abs(J))continue;
   				long long t1=i+I;
   				long long t2=j+J;
   				if(!in_range(t1,t2,n,n))continue;
   				if(visted[t1][t2])continue;

   				if(grid[t1][t2]=='T')continue;

   				qe.push({t1,t2});
   				visted[t1][t2]=true;

   		}
   	}
   	}
   	sz=qem.size();
   		for(int d=0;d<sz;d++){
   		long long i=qem.front().first;
   		long long j=qem.front().second;
   		qem.pop();

   		for(int I=-1;I<=1;I++){
   			for(int J=-1;J<=1;J++){
   				if(abs(I)==abs(J))continue;
   				long long t1=i+I;
   				long long t2=j+J;
   				if(!in_range(t1,t2,n,n))continue;
   				if(visted[t1][t2])continue;

   				if(grid[t1][t2]=='D')return true;

   				if(grid[t1][t2]=='T')continue;
   				if(grid[t1][t2]=='D')return true;
   				qem.push({t1,t2});
   				visted[t1][t2]=true;

   		}
   	}
   	}
   	}
  else {
     sz=qem.size();
   		for(int d=0;d<sz;d++){
   		long long i=qem.front().first;
   		long long j=qem.front().second;
   		qem.pop();

   		for(int I=-1;I<=1;I++){
   			for(int J=-1;J<=1;J++){
   				if(abs(I)==abs(J))continue;
   				long long t1=i+I;
   				long long t2=j+J;
   				if(!in_range(t1,t2,n,n))continue;
   				if(visted[t1][t2])continue;
   				if(grid[t1][t2]=='T')continue;
   				if(grid[t1][t2]=='D')return true;

   				qem.push({t1,t2});
   				visted[t1][t2]=true;

   		}
   	}
   	}
  }
  level++;
   }
  return false;
   };
long long l=0,r=1e6,ans=-1;
while(l<=r){
	long long mid=l+(r-l)/2;

	if(bfs(mid)){
		l=mid+1;
		ans=mid;
	}
	else r=mid-1;
}
cout<<ans<<endl;
}


int main(){

    ios_base::sync_with_stdio(0);
    cin.tie(0);


    //// freopen("lasers.in", "r", stdin);
    // freopen("lasers.out", "w", stdout);

    int t=1;
    while (t--){

        Nozarashi();
    }
    return 0;
}

Compilation message

mecho.cpp: In function 'long long int to_dec(std::string)':
mecho.cpp:45:25: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   45 |     for(long long  i=0;i<(s.size());i++){
      |                        ~^~~~~~~~~~~
mecho.cpp:43:9: warning: unused variable 'd' [-Wunused-variable]
   43 |     int d=0;
      |         ^

Subtask #1
89.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Incorrect 1 ms 212 KB Output isn't correct
3 Correct 1 ms 212 KB Output is correct
4 Incorrect 1 ms 212 KB Output isn't correct
5 Correct 1 ms 212 KB Output is correct
6 Incorrect 1 ms 212 KB Output isn't correct
7 Incorrect 464 ms 6408 KB Output isn't correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 2 ms 340 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 3 ms 340 KB Output is correct
15 Correct 1 ms 320 KB Output is correct
16 Correct 1 ms 316 KB Output is correct
17 Correct 1 ms 320 KB Output is correct
18 Correct 1 ms 212 KB Output is correct
19 Correct 1 ms 212 KB Output is correct
20 Correct 1 ms 212 KB Output is correct
21 Correct 1 ms 320 KB Output is correct
22 Correct 1 ms 320 KB Output is correct
23 Correct 1 ms 340 KB Output is correct
24 Correct 1 ms 340 KB Output is correct
25 Correct 2 ms 340 KB Output is correct
26 Correct 2 ms 340 KB Output is correct
27 Correct 2 ms 340 KB Output is correct
28 Correct 2 ms 324 KB Output is correct
29 Correct 2 ms 328 KB Output is correct
30 Correct 2 ms 340 KB Output is correct
31 Correct 3 ms 340 KB Output is correct
32 Correct 3 ms 340 KB Output is correct
33 Correct 42 ms 1492 KB Output is correct
34 Correct 50 ms 1492 KB Output is correct
35 Correct 41 ms 1540 KB Output is correct
36 Correct 57 ms 1876 KB Output is correct
37 Correct 56 ms 1916 KB Output is correct
38 Correct 53 ms 1916 KB Output is correct
39 Correct 71 ms 2348 KB Output is correct
40 Correct 70 ms 2264 KB Output is correct
41 Correct 66 ms 2344 KB Output is correct
42 Correct 93 ms 2812 KB Output is correct
43 Correct 86 ms 2812 KB Output is correct
44 Correct 90 ms 2812 KB Output is correct
45 Correct 114 ms 3292 KB Output is correct
46 Correct 106 ms 3292 KB Output is correct
47 Correct 108 ms 3300 KB Output is correct
48 Correct 126 ms 3816 KB Output is correct
49 Correct 127 ms 3916 KB Output is correct
50 Correct 125 ms 3832 KB Output is correct
51 Correct 149 ms 4368 KB Output is correct
52 Correct 145 ms 4360 KB Output is correct
53 Correct 154 ms 4308 KB Output is correct
54 Correct 203 ms 4964 KB Output is correct
55 Correct 167 ms 4964 KB Output is correct
56 Correct 177 ms 4972 KB Output is correct
57 Correct 202 ms 5608 KB Output is correct
58 Correct 198 ms 5588 KB Output is correct
59 Correct 200 ms 5628 KB Output is correct
60 Correct 215 ms 6200 KB Output is correct
61 Correct 231 ms 6292 KB Output is correct
62 Correct 236 ms 6392 KB Output is correct
63 Correct 408 ms 6228 KB Output is correct
64 Correct 470 ms 6228 KB Output is correct
65 Correct 418 ms 6296 KB Output is correct
66 Correct 437 ms 6296 KB Output is correct
67 Correct 404 ms 6300 KB Output is correct
68 Correct 443 ms 6316 KB Output is correct
69 Correct 408 ms 6440 KB Output is correct
70 Correct 444 ms 6324 KB Output is correct
71 Correct 450 ms 6324 KB Output is correct
72 Correct 471 ms 6324 KB Output is correct
73 Correct 73 ms 6576 KB Output is correct
74 Correct 492 ms 6568 KB Output is correct
75 Correct 505 ms 6604 KB Output is correct
76 Correct 473 ms 6572 KB Output is correct
77 Correct 476 ms 6576 KB Output is correct
78 Correct 443 ms 6552 KB Output is correct
79 Correct 459 ms 6484 KB Output is correct
80 Correct 471 ms 6548 KB Output is correct
81 Correct 480 ms 6552 KB Output is correct
82 Correct 491 ms 6548 KB Output is correct
83 Correct 504 ms 6504 KB Output is correct
84 Correct 470 ms 6512 KB Output is correct
85 Correct 440 ms 6508 KB Output is correct
86 Correct 482 ms 6504 KB Output is correct
87 Correct 480 ms 6504 KB Output is correct
88 Correct 468 ms 6584 KB Output is correct
89 Correct 452 ms 6460 KB Output is correct
90 Correct 469 ms 6464 KB Output is correct
91 Correct 462 ms 6412 KB Output is correct
92 Correct 475 ms 6464 KB Output is correct