Submission #636660

#	Time	Username	Problem	Language	Result	Execution time	Memory
636660		LKR__enjoyer	Tracks in the Snow (BOI13_tracks)	C++17	Compilation error	0 ms	0 KiB

tracks

#include<bits/stdc++.h>
#include <iostream>

using namespace std;
#define f first
#define s second
int n,m;
char grid[4000][4000];
int odl[4000][4000];
pair<int,int> ruchy[4]={{1,0},{-1,0},{0,1},{0,-1}};
void bfs(int i,int j)
{
deque<pair<int,int>> w; 
w.push_front({i,j});
    while(w.empty()==0)
    {
        pair<int,int> akt=w.front();
    w.pop_front();
        for(int z=0;z<4;z++)
        {
        int u1=akt.f+ruchy[z].f;
        int u2=akt.s+ruchy[z].s;    
            if(u1<0||u1>=n||u2<0||u2>=m||grid[u1][u2]=='.')continue;
        int waga=0;
            if(grid[akt.f][akt.s]!=grid[u1][u2])waga=1;
                if(odl[u1][u2]>odl[akt.f][akt.s]+waga)
                    {
                        odl[u1][u2]=odl[akt.f][akt.s]+waga;
                        if(waga==1)w.push_back({u1,u2});
                        else w.push_front({u1,u2});
                    }
        }
    }
}
int main()
{ cin>>n>>m;
for(int i=0;i<n;i++)
{for(int j=0;j<m;j++)
{   if(i||j)odl[i][j]=1e9;
    cin>>grid[i][j];
}
}
bfs(0,0);
int wynik=-1;
for(int i=0;i<n;i++)
for(int j=0;j<m;j++)
wynik=max(wynik,odl[i][j]);    
cout<<wynik+1;
    return 0;
}
bfs(0,0);
int wynik=-1;
for(int i=0;i<n;i++)
for(int j=0;j<m;j++)
wynik=max(wynik,odl[i][j]);    
cout<<wynik+1;
    return 0;
}

Compilation message (stderr)

tracks.cpp:51:4: error: expected constructor, destructor, or type conversion before '(' token
   51 | bfs(0,0);
      |    ^
tracks.cpp:53:1: error: expected unqualified-id before 'for'
   53 | for(int i=0;i<n;i++)
      | ^~~
tracks.cpp:53:13: error: 'i' does not name a type
   53 | for(int i=0;i<n;i++)
      |             ^
tracks.cpp:53:17: error: 'i' does not name a type
   53 | for(int i=0;i<n;i++)
      |                 ^
tracks.cpp:54:13: error: 'j' does not name a type
   54 | for(int j=0;j<m;j++)
      |             ^
tracks.cpp:54:17: error: 'j' does not name a type
   54 | for(int j=0;j<m;j++)
      |                 ^
tracks.cpp:56:1: error: 'cout' does not name a type
   56 | cout<<wynik+1;
      | ^~~~
tracks.cpp:57:5: error: expected unqualified-id before 'return'
   57 |     return 0;
      |     ^~~~~~
tracks.cpp:58:1: error: expected declaration before '}' token
   58 | }
      | ^