Submission #631274

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
631274	2022-08-18 02:20:44	czhang2718	Tracks in the Snow (BOI13_tracks)	C++17	97.81 / 100	2124 ms	682036 KiB

tracks

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
#include "bits/stdc++.h"
using namespace std;
const int N=4000;
int n, m;
string grid[N];
int par[N*N];
short rnk[N*N];
short dx[]={0, 0, 1, -1};
short dy[]={1, -1, 0, 0};
vector<int> adj[N*N];
int find(int x){ return par[x]==x?x:par[x]=find(par[x]); }
void join(int x, int y){
    int a=find(x);
    int b=find(y);
    if(a==b) return;
    if(rnk[a]<rnk[b]) par[a]=b;
    else if(rnk[b]<rnk[a]) par[b]=a;
    else{
        rnk[a]++;
        par[b]=a;
    }
}
int main(){
    cin.tie(0)->sync_with_stdio(0);
    cin >> n >> m;
 
 
הההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההה
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

• Subtask 1: 30 / 30
• Subtask 2: 67.8125 / 70