oj.uz

Submission #902738

# Submission time Handle Problem Language Result Execution time Memory
902738 2024-01-11T01:46:24 Z Keshav211 Tracks in the Snow (BOI13_tracks) C++14
95.625 / 100
 1105 ms 1048576 KB 
#include <fstream>
#include <iostream>
#include <vector>
#define grid(n,m) for (ll i=1;i<=n;i++){for (ll j=1;j<=m;j++) cin>>graph[i][j];}
#define vll vector<ll>
#define qll queue<ll>
#define pll pair<ll,ll>
#define str string
#define pb push_back
#define ll long long
using namespace std;
const ll inf=2*1e5+1;
const ll graph_size=4000;
// Fast Input/Output
void fastio(){
    ios_base::sync_with_stdio(0);
    cin.tie(nullptr);
}
// File Input/Output
str fileio(const string&filePath=__FILE__){
    size_t lastSlash=filePath.find_last_of('/');
    size_t lastDot=filePath.rfind('.');
    return filePath.substr(lastSlash+1,lastDot-lastSlash-1);
}
ll n,m;
// Floodfill
char graph[graph_size+2][graph_size+2];
vector<pll> directions={{0,-1},{-1,0},{1,0},{0,1}};
vector<pll> path;
vector<pll> path1;
ll curr=0;
void floodfill_dfs(pll coord,char color){
    ll x=coord.first;
    ll y=coord.second;
    if (graph[x][y]=='.' or graph[x][y]!=color){
        return;
    }
    curr++;
    graph[x][y]='.';
    path1.pb({x,y});
    for (auto i:directions){
        floodfill_dfs({x+i.first,y+i.second},color);
    }
}
int main(){
    // auto start_time=chrono::steady_clock::now();
    fastio();
    // str filename=fileio();
    // ifstream cin(filename+".in");
    // ofstream cout(filename+".out");
    ll t=1;
    // cin>>t;
    while (t--){
        cin>>n>>m;
        grid(n,m);
        ll tracks=0;
        for (ll i=1;i<=n;i++){
            for (ll j=1;j<=m;j++){
                if (graph[i][j]!='.'){
                    tracks++;
                }
            }
        }
        for (ll i=0;i<=n;i++){
            graph[i][0]='.';
            graph[i][m+1]='.';
        }
        for (ll i=0;i<=m;i++){
            graph[0][i]='.';
            graph[n+1][i]='.';
        }
        char animal=graph[1][1];
        ll ans=0;
        path.pb({n,m});
        while (curr<tracks){
            ans++;
            for (auto i:path){
                for (auto j:directions){
                    floodfill_dfs({i.first+j.first,i.second+j.second},animal);
                }
            }
            path=path1;
            path1.clear();
            if (animal=='F'){
                animal='R';
            }
            else{
                animal='F';
            }
        }
        cout<<ans<<"\n";
    }
    // auto end_time=chrono::steady_clock::now();
    // auto elapsed_time=chrono::duration_cast<chrono::milliseconds>(end_time-start_time);
    // cout<<"Elapsed time: "<<elapsed_time.count()<<" milliseconds\n";
}

Subtask #1
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 18 ms 3780 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 1 ms 2652 KB Output is correct
4 Correct 14 ms 7180 KB Output is correct
5 Correct 3 ms 2652 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 1 ms 2652 KB Output is correct
8 Correct 1 ms 2652 KB Output is correct
9 Correct 1 ms 2652 KB Output is correct
10 Correct 2 ms 2652 KB Output is correct
11 Correct 3 ms 3932 KB Output is correct
12 Correct 7 ms 3164 KB Output is correct
13 Correct 4 ms 2664 KB Output is correct
14 Correct 4 ms 2664 KB Output is correct
15 Correct 12 ms 3176 KB Output is correct
16 Correct 15 ms 3788 KB Output is correct
17 Correct 9 ms 2944 KB Output is correct
18 Correct 10 ms 7132 KB Output is correct

Subtask #2
65.625 / 70.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 15708 KB Output is correct
2 Correct 45 ms 8704 KB Output is correct
3 Correct 319 ms 32752 KB Output is correct
4 Correct 72 ms 12884 KB Output is correct
5 Correct 217 ms 22416 KB Output is correct
6 Correct 960 ms 391172 KB Output is correct
7 Correct 4 ms 16472 KB Output is correct
8 Correct 5 ms 15708 KB Output is correct
9 Correct 3 ms 1116 KB Output is correct
10 Correct 1 ms 860 KB Output is correct
11 Correct 3 ms 16220 KB Output is correct
12 Correct 1 ms 2652 KB Output is correct
13 Correct 62 ms 8540 KB Output is correct
14 Correct 27 ms 5724 KB Output is correct
15 Correct 20 ms 5868 KB Output is correct
16 Correct 24 ms 3420 KB Output is correct
17 Correct 114 ms 13176 KB Output is correct
18 Correct 80 ms 13232 KB Output is correct
19 Correct 78 ms 12904 KB Output is correct
20 Correct 79 ms 12532 KB Output is correct
21 Correct 205 ms 22864 KB Output is correct
22 Correct 219 ms 22376 KB Output is correct
23 Correct 255 ms 19352 KB Output is correct
24 Correct 288 ms 22500 KB Output is correct
25 Correct 336 ms 32368 KB Output is correct
26 Runtime error 922 ms 1048576 KB Execution killed with signal 9
27 Runtime error 1069 ms 1048576 KB Execution killed with signal 9
28 Correct 987 ms 390596 KB Output is correct
29 Correct 936 ms 352444 KB Output is correct
30 Correct 1078 ms 641536 KB Output is correct
31 Correct 683 ms 30308 KB Output is correct
32 Correct 1105 ms 920712 KB Output is correct