oj.uz

Submission #1091823

# Submission time Handle Problem Language Result Execution time Memory
1091823 2024-09-22T09:54:50 Z Jakub_Wozniak Tracks in the Snow (BOI13_tracks) C++14
86.875 / 100
 2000 ms 77080 KB 
#include <bits/stdc++.h>
using namespace std;
const int maxn = 4009;
typedef long long ll;
int N , M;
string s[maxn];
int a , b , c;
vector <pair<int,int>> R;
bool vis[maxn][maxn];
int MAXI = 0;

void pr()
{
    R.push_back({-1,0});
    R.push_back({1,0});
    R.push_back({0,1});
    R.push_back({0,-1});
}

int main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cin >> N >> M;
    for(int i = 0 ; i <= M+1 ; i++ )s[0] += '&';
    for(int i = 0 ; i <= M+1 ; i++ )s[N+1] += '&';

    pr();
    for(int i = 1 ; i <= N  ;i++)
    {
        cin >> s[i];
        s[i] = '&'+s[i]+'&';
    }

    priority_queue <pair<int,int>> q;
    pair<int,int> DS;
    q.push({-1,1*maxn+1});
    int i , j;
    while(!q.empty())
    {
        DS = q.top();
        c = -DS.first; 
        i = DS.second/maxn;
        j = DS.second%maxn;
        q.pop();
        if(vis[i][j] == 1){continue;}
        vis[i][j] = 1;
        MAXI = max(MAXI , c);

        
        for(int k = 0 ; k < R.size() ; k++)
        {

            a = i+R[k].first;
            b = j+R[k].second;
            if(s[a][b] == '&' || s[a][b] == '.' || vis[a][b] == 1)continue;
            
            if(s[a][b] == s[i][j]){ q.push({-c,a*maxn+b});}
            else {q.push({-(c+1),a*maxn+b});}
        }
    }

    cout << MAXI << '\n';


    return 0;
}

Compilation message

tracks.cpp: In function 'int main()':
tracks.cpp:51:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   51 |         for(int k = 0 ; k < R.size() ; k++)
      |                         ~~^~~~~~~~~~

Subtask #1
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 56 ms 3420 KB Output is correct
2 Correct 0 ms 604 KB Output is correct
3 Correct 1 ms 604 KB Output is correct
4 Correct 30 ms 3544 KB Output is correct
5 Correct 4 ms 1880 KB Output is correct
6 Correct 0 ms 604 KB Output is correct
7 Correct 1 ms 604 KB Output is correct
8 Correct 2 ms 860 KB Output is correct
9 Correct 1 ms 860 KB Output is correct
10 Correct 5 ms 1628 KB Output is correct
11 Correct 7 ms 1624 KB Output is correct
12 Correct 18 ms 1880 KB Output is correct
13 Correct 4 ms 1880 KB Output is correct
14 Correct 4 ms 1880 KB Output is correct
15 Correct 38 ms 3420 KB Output is correct
16 Correct 51 ms 3476 KB Output is correct
17 Correct 20 ms 3040 KB Output is correct
18 Correct 28 ms 3544 KB Output is correct

Subtask #2
56.875 / 70.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 15448 KB Output is correct
2 Correct 118 ms 9564 KB Output is correct
3 Correct 313 ms 55812 KB Output is correct
4 Correct 88 ms 17408 KB Output is correct
5 Correct 127 ms 34812 KB Output is correct
6 Execution timed out 2092 ms 72372 KB Time limit exceeded
7 Correct 7 ms 16216 KB Output is correct
8 Correct 7 ms 15452 KB Output is correct
9 Correct 5 ms 940 KB Output is correct
10 Correct 1 ms 604 KB Output is correct
11 Correct 6 ms 15964 KB Output is correct
12 Correct 1 ms 1116 KB Output is correct
13 Correct 116 ms 9808 KB Output is correct
14 Correct 66 ms 6748 KB Output is correct
15 Correct 15 ms 7272 KB Output is correct
16 Correct 61 ms 3928 KB Output is correct
17 Correct 299 ms 18848 KB Output is correct
18 Correct 62 ms 18524 KB Output is correct
19 Correct 93 ms 17328 KB Output is correct
20 Correct 78 ms 16116 KB Output is correct
21 Correct 189 ms 38104 KB Output is correct
22 Correct 127 ms 36948 KB Output is correct
23 Correct 565 ms 31660 KB Output is correct
24 Correct 101 ms 37460 KB Output is correct
25 Correct 260 ms 59804 KB Output is correct
26 Correct 1418 ms 47708 KB Output is correct
27 Execution timed out 2021 ms 62164 KB Time limit exceeded
28 Execution timed out 2090 ms 76568 KB Time limit exceeded
29 Execution timed out 2021 ms 76420 KB Time limit exceeded
30 Execution timed out 2021 ms 77080 KB Time limit exceeded
31 Execution timed out 2019 ms 43464 KB Time limit exceeded
32 Correct 1838 ms 64236 KB Output is correct