oj.uz

Submission #742461

# Submission time Handle Problem Language Result Execution time Memory
742461 2023-05-16T09:34:21 Z irmuun Tracks in the Snow (BOI13_tracks) C++17
100 / 100
 468 ms 113156 KB 
#include<bits/stdc++.h>
 
using namespace std;
 
#define pb push_back
#define ll long long
#define ff first
#define ss second
#define all(s) s.begin(),s.end()

int main(){
    ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0);
    int h,w;
    cin>>h>>w;
    string s[h+5];
    int used[h+5][w+5];
    for(int i=0;i<h;i++){
        cin>>s[i];
        for(int j=0;j<w;j++){
            used[i][j]=0;
        }
    }
    used[0][0]=1;
    deque<pair<int,int>>q;
    q.pb({0,0});
    int ans=0;
    while(!q.empty()){
        int x=q.front().ff,y=q.front().ss;
        ans=max(ans,used[x][y]);
        q.pop_front();
        if(x>0&&used[x-1][y]==0&&s[x-1][y]!='.'){
            if(s[x-1][y]==s[x][y]){
                used[x-1][y]=used[x][y];
                q.push_front({x-1,y});
            }
            else{
                used[x-1][y]=used[x][y]+1;
                q.pb({x-1,y});
            }
        }
        if(x<h-1&&used[x+1][y]==0&&s[x+1][y]!='.'){
            if(s[x+1][y]==s[x][y]){
                used[x+1][y]=used[x][y];
                q.push_front({x+1,y});
            }
            else{
                used[x+1][y]=used[x][y]+1;
                q.pb({x+1,y});
            }
        }
        if(y>0&&used[x][y-1]==0&&s[x][y-1]!='.'){
            if(s[x][y-1]==s[x][y]){
                used[x][y-1]=used[x][y];
                q.push_front({x,y-1});
            }
            else{
                used[x][y-1]=used[x][y]+1;
                q.pb({x,y-1});
            }
        }
        if(y<w-1&&used[x][y+1]==0&&s[x][y+1]!='.'){
            if(s[x][y+1]==s[x][y]){
                used[x][y+1]=used[x][y];
                q.push_front({x,y+1});
            }
            else{
                used[x][y+1]=used[x][y]+1;
                q.pb({x,y+1});
            }
        }
    }
    cout<<ans;
}

Subtask #1
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 9 ms 1748 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 5 ms 1364 KB Output is correct
5 Correct 2 ms 716 KB Output is correct
6 Correct 1 ms 320 KB Output is correct
7 Correct 1 ms 320 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 2 ms 724 KB Output is correct
11 Correct 2 ms 588 KB Output is correct
12 Correct 3 ms 840 KB Output is correct
13 Correct 3 ms 724 KB Output is correct
14 Correct 2 ms 724 KB Output is correct
15 Correct 11 ms 1816 KB Output is correct
16 Correct 9 ms 1800 KB Output is correct
17 Correct 7 ms 1740 KB Output is correct
18 Correct 5 ms 1364 KB Output is correct

Subtask #2
70.0 / 70.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 724 KB Output is correct
2 Correct 37 ms 9552 KB Output is correct
3 Correct 163 ms 81956 KB Output is correct
4 Correct 49 ms 20492 KB Output is correct
5 Correct 127 ms 46600 KB Output is correct
6 Correct 468 ms 95148 KB Output is correct
7 Correct 2 ms 724 KB Output is correct
8 Correct 2 ms 724 KB Output is correct
9 Correct 2 ms 716 KB Output is correct
10 Correct 1 ms 468 KB Output is correct
11 Correct 1 ms 712 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 30 ms 9488 KB Output is correct
14 Correct 18 ms 5748 KB Output is correct
15 Correct 12 ms 6228 KB Output is correct
16 Correct 14 ms 4180 KB Output is correct
17 Correct 79 ms 21940 KB Output is correct
18 Correct 48 ms 21632 KB Output is correct
19 Correct 44 ms 20428 KB Output is correct
20 Correct 40 ms 18880 KB Output is correct
21 Correct 104 ms 48140 KB Output is correct
22 Correct 127 ms 46516 KB Output is correct
23 Correct 162 ms 40536 KB Output is correct
24 Correct 114 ms 46960 KB Output is correct
25 Correct 310 ms 82032 KB Output is correct
26 Correct 291 ms 113156 KB Output is correct
27 Correct 362 ms 101000 KB Output is correct
28 Correct 446 ms 96624 KB Output is correct
29 Correct 450 ms 97036 KB Output is correct
30 Correct 414 ms 95208 KB Output is correct
31 Correct 347 ms 53548 KB Output is correct
32 Correct 322 ms 97612 KB Output is correct