oj.uz

Submission #1091831

# Submission time Handle Problem Language Result Execution time Memory
1091831 2024-09-22T10:14:15 Z Jakub_Wozniak Tracks in the Snow (BOI13_tracks) C++14
95.625 / 100
 2000 ms 78400 KB 
#include <bits/stdc++.h>
using namespace std;
const int maxn = 4009;
typedef long long ll;
int N , M;
string s[maxn];
string SA;
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++ )SA.push_back( '.');
    s[0] = SA;
    s[N+1] = SA;


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

    priority_queue <pair<int,int>> q;
    pair<int,int> DS;
    q.push({-1,1*maxn+1});
    int i , j;
    vis[1][1] = 1;

    while(!q.empty())
    {
        DS = q.top();
        c = -DS.first; 
        i = DS.second/maxn;
        j = DS.second%maxn;
        q.pop();
        
        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] == '.' || vis[a][b])continue;
            vis[a][b] = 1;
            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:56:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   56 |         for(int k = 0 ; k < R.size() ; k++)
      |                         ~~^~~~~~~~~~

Subtask #1
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 26 ms 3164 KB Output is correct
2 Correct 0 ms 604 KB Output is correct
3 Correct 1 ms 648 KB Output is correct
4 Correct 16 ms 3216 KB Output is correct
5 Correct 3 ms 1884 KB Output is correct
6 Correct 0 ms 604 KB Output is correct
7 Correct 1 ms 600 KB Output is correct
8 Correct 1 ms 856 KB Output is correct
9 Correct 1 ms 856 KB Output is correct
10 Correct 3 ms 1628 KB Output is correct
11 Correct 4 ms 1604 KB Output is correct
12 Correct 10 ms 2056 KB Output is correct
13 Correct 3 ms 1884 KB Output is correct
14 Correct 3 ms 1884 KB Output is correct
15 Correct 20 ms 3356 KB Output is correct
16 Correct 27 ms 3160 KB Output is correct
17 Correct 13 ms 3160 KB Output is correct
18 Correct 23 ms 3228 KB Output is correct

Subtask #2
65.625 / 70.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 15452 KB Output is correct
2 Correct 80 ms 9896 KB Output is correct
3 Correct 237 ms 61780 KB Output is correct
4 Correct 86 ms 18952 KB Output is correct
5 Correct 131 ms 38196 KB Output is correct
6 Correct 1964 ms 78400 KB Output is correct
7 Correct 6 ms 16472 KB Output is correct
8 Correct 6 ms 15452 KB Output is correct
9 Correct 3 ms 856 KB Output is correct
10 Correct 1 ms 604 KB Output is correct
11 Correct 7 ms 15964 KB Output is correct
12 Correct 1 ms 1116 KB Output is correct
13 Correct 72 ms 10028 KB Output is correct
14 Correct 47 ms 6744 KB Output is correct
15 Correct 12 ms 7464 KB Output is correct
16 Correct 38 ms 3932 KB Output is correct
17 Correct 195 ms 20356 KB Output is correct
18 Correct 52 ms 20060 KB Output is correct
19 Correct 87 ms 18768 KB Output is correct
20 Correct 68 ms 17456 KB Output is correct
21 Correct 150 ms 39252 KB Output is correct
22 Correct 130 ms 38024 KB Output is correct
23 Correct 382 ms 31828 KB Output is correct
24 Correct 111 ms 37432 KB Output is correct
25 Correct 201 ms 59960 KB Output is correct
26 Correct 957 ms 47696 KB Output is correct
27 Correct 1613 ms 62100 KB Output is correct
28 Execution timed out 2023 ms 76476 KB Time limit exceeded
29 Execution timed out 2049 ms 68128 KB Time limit exceeded
30 Correct 1986 ms 66812 KB Output is correct
31 Correct 1289 ms 41944 KB Output is correct
32 Correct 1225 ms 60872 KB Output is correct