oj.uz

Submission #1100020

# Submission time Handle Problem Language Result Execution time Memory
1100020 2024-10-12T11:54:49 Z asli_bg Mecho (IOI09_mecho) C++11
41 / 100
 1000 ms 26452 KB 
#pragma GCC optimize("O3,unroll-loops")

#include<bits/stdc++.h>
using namespace std;

#include <ext/pb_ds/assoc_container.hpp>
using namespace __gnu_pbds;
#define inset tree<int,null_type,less<int>,rb_tree_tag,tree_order_statistics_node_update>

#define int long long

#define fi first
#define se second
#define all(x) x.begin(),x.end()
#define FOR(i,a) for(int i=0;i<(a);i++)
#define FORE(i,a,b) for(int i=(a);i<(b);i++)

typedef pair<int,int> pii;
typedef vector<int> vi;
typedef vector<bool> vb;
typedef vector<pii> vii;

#define cont(x) for(auto el:x) {cout<<el<<' ';} cout<<endl;
//#define endl '\n'
#define contp(x) for(auto el:x) {cout<<el.fi<<'-'<<el.se<<' ';} cout<<endl;
#define pb push_back

#define sp <<' '<<

#define DEBUG(x) {cout<<(#x) sp x<<endl;}

const int MAXN=805;
const int INF=1e9;

int n,s;
vector<string> grid;
set<pii> ari;
int mark[MAXN][MAXN];

set<pii> hive;

pii bas,son;
int yon1[4]={1,-1,0,0};
int yon2[4]={0,0,-1,1};
//sag, sol, asagi, yukari

bool isvalid(int x,int y,bool f){
    if(x>=n or y>=n or x<0 or y<0) return false;
    if(f){
        if(grid[x][y]!='G' and grid[x][y]!='M') return false;
        if(hive.count({x,y})) return false;
    }
    else{
        if(grid[x][y]!='G' and grid[x][y]!='D') return false;
    }
    return true;
}

bool check(int deg){
    //düz shortest path bfs
    vector<vb> vis(n+1, vb(n+1,false));
    queue<pair<pii,int>> q;

    if(mark[bas.fi][bas.se]<deg) return false;

    q.push({bas,0});
    vis[bas.fi][bas.se]=true;

    //cout<<"DEEEEEG" sp deg<<endl;

    while(!q.empty()){
        auto el=q.front();
        q.pop();

        int adim=el.se;
        int x=el.fi.fi;
        int y=el.fi.se;
        //cout<<"control" sp adim sp x sp y<<endl;

        FOR(i,4){
            int yenix=x+yon1[i];
            int yeniy=y+yon2[i];

            if(!isvalid(yenix,yeniy,false)) continue;
            if(vis[yenix][yeniy]) continue;
            
            int sure=adim/s;
            //DEBUG(sure);
            //DEBUG(yenix);
            //DEBUG(yeniy);
            if(mark[yenix][yeniy]<deg+sure) continue;
            if((adim+1)%s==0){
                if(mark[yenix][yeniy]==deg+sure) continue;   
            }

            q.push({{yenix,yeniy},adim+1});
            vis[yenix][yeniy]=true;
        }
    }

    return vis[son.fi][son.se];
}

signed main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);

    cin>>n>>s;
    grid.resize(n);
    FOR(i,n) cin>>grid[i];

    FOR(i,n){
        FOR(j,n){
            if(grid[i][j]=='H'){
                hive.insert({i,j});
                mark[i][j]=0;
            }
            if(grid[i][j]=='M') {
                bas={i,j};
            }
            if(grid[i][j]=='D'){
                son={i,j};
                mark[i][j]=INF;
            }
        }
    }
    int mx=0;
    for(int i=0;true;i++){ //x kez ilerle
        set<pii> tut;

        for(auto el:hive){
            FOR(i,4){
                int yenix=el.fi+yon1[i];
                int yeniy=el.se+yon2[i];
                if(isvalid(yenix,yeniy,true)){
                    tut.insert({yenix,yeniy});
                }
            }
        }

        if(tut.empty()) break;

        mx=i;

        for(auto el:tut){
            mark[el.fi][el.se]=i+1;
            hive.insert(el);
        }
    }

    /*FOR(i,n){
        FOR(j,n) cout<<mark[i][j]<<' ';
        cout<<endl;
    }
    cout<<endl;*/

    //check(1);
    int l=0;
    int r=mx+1;
    while(l+1<r){
        int mid=(l+r)/2;
        if(check(mid)) l=mid;
        else r=mid;
    }

    cout<<l-1<<endl;
}

Subtask #1
41.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Execution timed out 1034 ms 21840 KB Time limit exceeded
8 Correct 1 ms 344 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Incorrect 32 ms 2748 KB Output isn't correct
13 Correct 9 ms 2652 KB Output is correct
14 Correct 17 ms 2768 KB Output is correct
15 Correct 1 ms 348 KB Output is correct
16 Correct 1 ms 348 KB Output is correct
17 Correct 2 ms 348 KB Output is correct
18 Correct 1 ms 348 KB Output is correct
19 Correct 7 ms 2652 KB Output is correct
20 Correct 3 ms 2648 KB Output is correct
21 Correct 16 ms 2660 KB Output is correct
22 Correct 9 ms 2652 KB Output is correct
23 Correct 52 ms 2640 KB Output is correct
24 Correct 24 ms 2648 KB Output is correct
25 Correct 126 ms 2644 KB Output is correct
26 Correct 63 ms 2680 KB Output is correct
27 Correct 190 ms 2576 KB Output is correct
28 Correct 90 ms 2708 KB Output is correct
29 Correct 259 ms 2644 KB Output is correct
30 Correct 132 ms 2728 KB Output is correct
31 Correct 351 ms 2648 KB Output is correct
32 Correct 163 ms 2708 KB Output is correct
33 Execution timed out 1072 ms 2696 KB Time limit exceeded
34 Execution timed out 1034 ms 3156 KB Time limit exceeded
35 Execution timed out 1058 ms 6688 KB Time limit exceeded
36 Execution timed out 1032 ms 2896 KB Time limit exceeded
37 Execution timed out 1052 ms 5388 KB Time limit exceeded
38 Execution timed out 1057 ms 9012 KB Time limit exceeded
39 Execution timed out 1085 ms 2856 KB Time limit exceeded
40 Execution timed out 1042 ms 5200 KB Time limit exceeded
41 Execution timed out 1035 ms 9044 KB Time limit exceeded
42 Execution timed out 1070 ms 2900 KB Time limit exceeded
43 Execution timed out 1054 ms 3080 KB Time limit exceeded
44 Execution timed out 1055 ms 9300 KB Time limit exceeded
45 Execution timed out 1012 ms 2860 KB Time limit exceeded
46 Execution timed out 1061 ms 3344 KB Time limit exceeded
47 Execution timed out 1098 ms 9552 KB Time limit exceeded
48 Execution timed out 1031 ms 3044 KB Time limit exceeded
49 Execution timed out 1071 ms 3412 KB Time limit exceeded
50 Execution timed out 1044 ms 9616 KB Time limit exceeded
51 Execution timed out 1055 ms 3016 KB Time limit exceeded
52 Execution timed out 1040 ms 3324 KB Time limit exceeded
53 Execution timed out 1045 ms 9812 KB Time limit exceeded
54 Execution timed out 1022 ms 1104 KB Time limit exceeded
55 Execution timed out 1022 ms 1360 KB Time limit exceeded
56 Execution timed out 1067 ms 9812 KB Time limit exceeded
57 Execution timed out 1038 ms 1392 KB Time limit exceeded
58 Execution timed out 1047 ms 1360 KB Time limit exceeded
59 Execution timed out 1028 ms 10172 KB Time limit exceeded
60 Execution timed out 1039 ms 1360 KB Time limit exceeded
61 Execution timed out 1060 ms 1488 KB Time limit exceeded
62 Execution timed out 1058 ms 10832 KB Time limit exceeded
63 Execution timed out 1044 ms 8232 KB Time limit exceeded
64 Execution timed out 1087 ms 4944 KB Time limit exceeded
65 Execution timed out 1059 ms 4948 KB Time limit exceeded
66 Execution timed out 1040 ms 8464 KB Time limit exceeded
67 Execution timed out 1049 ms 5476 KB Time limit exceeded
68 Execution timed out 1094 ms 19004 KB Time limit exceeded
69 Execution timed out 1079 ms 18784 KB Time limit exceeded
70 Execution timed out 1079 ms 19016 KB Time limit exceeded
71 Execution timed out 1064 ms 19052 KB Time limit exceeded
72 Execution timed out 1082 ms 19152 KB Time limit exceeded
73 Execution timed out 1081 ms 26452 KB Time limit exceeded
74 Execution timed out 1072 ms 26448 KB Time limit exceeded
75 Execution timed out 1077 ms 26196 KB Time limit exceeded
76 Execution timed out 1083 ms 26412 KB Time limit exceeded
77 Execution timed out 1038 ms 26192 KB Time limit exceeded
78 Execution timed out 1020 ms 25424 KB Time limit exceeded
79 Execution timed out 1075 ms 25684 KB Time limit exceeded
80 Execution timed out 1064 ms 25684 KB Time limit exceeded
81 Execution timed out 1067 ms 25628 KB Time limit exceeded
82 Execution timed out 1071 ms 25684 KB Time limit exceeded
83 Execution timed out 1058 ms 25940 KB Time limit exceeded
84 Execution timed out 1059 ms 25996 KB Time limit exceeded
85 Execution timed out 1043 ms 25992 KB Time limit exceeded
86 Execution timed out 1066 ms 25980 KB Time limit exceeded
87 Execution timed out 1071 ms 25940 KB Time limit exceeded
88 Execution timed out 1047 ms 25504 KB Time limit exceeded
89 Execution timed out 1058 ms 25428 KB Time limit exceeded
90 Execution timed out 1058 ms 25424 KB Time limit exceeded
91 Execution timed out 1056 ms 25568 KB Time limit exceeded
92 Execution timed out 1066 ms 25740 KB Time limit exceeded