oj.uz

Submission #444002

# Submission time Handle Problem Language Result Execution time Memory
444002 2021-07-12T20:47:28 Z hackerbhaiya Tracks in the Snow (BOI13_tracks) C++14
100 / 100
 951 ms 112924 KB 
#include<bits/stdc++.h>
// #pragma GCC optimize("Ofast")
// #pragma GCC target("avx,avx2,fma")
// #pragma GCC optimization("unroll-loops")
// #pragma GCC optimize("unroll-loops")
// #pragma GCC optimize("fast-math")
// #pragma GCC optimize("no-stack-protector")
// #define ll __int128
#define ll long long
// #define ll int
#define f(i,a,b) for(int i=a;i<b;i++)
#define mod 1000000007
// #define mod 998244353 
#define mp make_pair
#define uniq(v) (v).erase(unique(all(v)),(v).end())
#define ff first
#define ss second
#define rf(i,a,b) for(int i=a;i>=b;i--)
#define sc(a) scanf("%lld",&a)
#define pf printf
#define sz(a) (int)(a.size())
#define psf push_front
#define ppf pop_front
#define ppb pop_back
#define pb push_back
#define pq priority_queue
#define all(s) s.begin(),s.end()
#define sp(a) setprecision(a)
#define rz resize
#define ld long double
#define inf (ll)1e18
#define ub upper_bound
#define lb lower_bound
#define bs binary_search
#define eb emplace_back
const double pi = acos(-1);
ll binpow(ll a, ll b){ll res=1;while(b!=0){if(b&1)res*=a;a*=a;b>>=1;}return res;}
// ll binpow(ll a, ll b, ll md){ll res=1;a%=mod;while(b!=0){if(b&1)res*=a,res%=md;a*=a,a%=md;b>>=1;}return res%md;}
 
using namespace std;

int n,m;
int dx[]={0,1,0,-1};
int dy[]={1,0,-1,0};
vector<string> s;

bool check(int x, int y)
{
    if(x>=0 && y>=0 && x<n && y<m && s[x][y]!='.')
        return 1;
    return 0;
}

int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    // freopen("xortransform.in","r",stdin);
    // freopen("xortransform.out","w",stdout);
// #ifndef ONLINE_JUDGE
//     freopen("input.txt","r",stdin);
//     freopen("output.txt","w",stdout);
// #endif
    int z=1;
    // cin>>z;
    f(i,1,z+1)
    {
        int ans=1;
        cin>>n>>m;
        s.rz(n);
        f(i,0,n)
            cin>>s[i];
        vector<vector<int> > dis(n,vector<int> (m,INT_MAX));
        deque<pair<int,int> > q;
        q.psf({0,0}); 
        dis[0][0]=1;
        while(!q.empty())
        {
            auto temp=q.front();
            q.pop_front();
            int x=temp.ff,y=temp.ss;
            f(i,0,4)
            {
                int xx=x+dx[i],yy=y+dy[i];
                if(check(xx,yy))
                {
                    if(s[xx][yy]!=s[x][y] && dis[xx][yy]>dis[x][y]+1)
                    {
                        dis[xx][yy]=1+dis[x][y];
                        ans=max(ans,dis[xx][yy]);
                        q.pb({xx,yy});
                    }
                    else if(s[xx][yy]==s[x][y] && dis[xx][yy]>dis[x][y])
                    {
                        dis[xx][yy]=dis[x][y];
                        ans=max(ans,dis[xx][yy]);
                        q.psf({xx,yy});
                    }
                }
            }
        }
        cout<<ans<<"\n";      
    }
}

Subtask #1
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 16 ms 1740 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 1 ms 332 KB Output is correct
4 Correct 9 ms 1484 KB Output is correct
5 Correct 2 ms 716 KB Output is correct
6 Correct 0 ms 204 KB Output is correct
7 Correct 1 ms 204 KB Output is correct
8 Correct 1 ms 332 KB Output is correct
9 Correct 1 ms 332 KB Output is correct
10 Correct 3 ms 716 KB Output is correct
11 Correct 3 ms 588 KB Output is correct
12 Correct 6 ms 836 KB Output is correct
13 Correct 2 ms 716 KB Output is correct
14 Correct 2 ms 716 KB Output is correct
15 Correct 13 ms 1864 KB Output is correct
16 Correct 17 ms 1848 KB Output is correct
17 Correct 9 ms 1700 KB Output is correct
18 Correct 9 ms 1484 KB Output is correct

Subtask #2
70.0 / 70.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 716 KB Output is correct
2 Correct 47 ms 8908 KB Output is correct
3 Correct 233 ms 82296 KB Output is correct
4 Correct 62 ms 19788 KB Output is correct
5 Correct 158 ms 46660 KB Output is correct
6 Correct 931 ms 96340 KB Output is correct
7 Correct 2 ms 716 KB Output is correct
8 Correct 2 ms 716 KB Output is correct
9 Correct 2 ms 588 KB Output is correct
10 Correct 1 ms 460 KB Output is correct
11 Correct 2 ms 716 KB Output is correct
12 Correct 1 ms 460 KB Output is correct
13 Correct 48 ms 8652 KB Output is correct
14 Correct 28 ms 5324 KB Output is correct
15 Correct 17 ms 5784 KB Output is correct
16 Correct 25 ms 4044 KB Output is correct
17 Correct 122 ms 21016 KB Output is correct
18 Correct 77 ms 20832 KB Output is correct
19 Correct 62 ms 19568 KB Output is correct
20 Correct 57 ms 17996 KB Output is correct
21 Correct 143 ms 47932 KB Output is correct
22 Correct 156 ms 46292 KB Output is correct
23 Correct 248 ms 40136 KB Output is correct
24 Correct 134 ms 46752 KB Output is correct
25 Correct 422 ms 82036 KB Output is correct
26 Correct 951 ms 112924 KB Output is correct
27 Correct 900 ms 107680 KB Output is correct
28 Correct 943 ms 96304 KB Output is correct
29 Correct 943 ms 93680 KB Output is correct
30 Correct 921 ms 99148 KB Output is correct
31 Correct 718 ms 53008 KB Output is correct
32 Correct 865 ms 106028 KB Output is correct