답안 #906635

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
906635	2024-01-14T15:22:46 Z	tosivanmak	Mecho (IOI09_mecho)	C++17	58 / 100	499 ms	65536 KB

mecho

#include <bits/stdc++.h>
using namespace std;
#define ll int
 
ll dx[4]={0,0,1,-1};
ll dy[4]={1,-1,0,0};
vector<pair<ll,ll> >pos;
struct Graph{
 bool vis[802][802];
 ll dist[802][802];
    vector<pair<ll,ll> >adj[802][802];
 queue<pair<ll,ll> >q;
    void init(ll n){
        for(int i=1;i<=n;i++){
                for(int j=1;j<=n;j++){
                    dist[i][j]=1e9;
                }
            }
    }
    void add_edge(ll r, ll c, ll r2, ll c2){
        adj[r][c].push_back({r2,c2});
    }
 void bfs(){
   for(auto& u: pos){
      vis[u.first][u.second]=1;
       dist[u.first][u.second]=0;
       q.push({u.first,u.second});
   }
   while(!q.empty()){
       pair<ll,ll>cur=q.front();
       q.pop();
       for(auto& u: adj[cur.first][cur.second]){
           if(!vis[u.first][u.second]){
               vis[u.first][u.second]=1;
               dist[u.first][u.second]=dist[cur.first][cur.second]+1;
               q.push(u);
           }
       }
   }
}
}gp2;
struct Graph2{
 bool vis[802][802];
    vector<pair<ll,ll> >adj[802][802];
 queue<pair<ll,ll> >q;
    ll bees[802][802];
    ll dist[802][802];
    void add_edge(ll r, ll c, ll r2, ll c2){
        adj[r][c].push_back({r2,c2});
    }
 void bfs(ll r, ll c, ll para, ll divi){
     vis[r][c]=1;
     dist[r][c]=0;
     q.push({r,c});
   while(!q.empty()){
       pair<ll,ll>cur=q.front();
       q.pop();
       for(auto& u: adj[cur.first][cur.second]){
           // cout<<bees[u.first][u.second]<<'\n';
           // cout<<dist[cur.first][cur.second]+1<<" "<<(ll)(divi+1)*(ll)bees[u.first][u.second]-(ll)1<<'\n';
           long long lol=divi;
           lol*=((long long)bees[u.first][u.second]-(long long)para);
           lol--;
           long long lol2=dist[cur.first][cur.second];
           lol2++;
           // cout<<lol<<'\n';
           // if(lol<0){
           //     cout<<divi+1<<" "<<bees[u.first][u.second]<<'\n';
           // }
           if(!vis[u.first][u.second]&&(lol2<=lol)){
               // cout<<u.first<<" "<<u.second<<'\n';
               vis[u.first][u.second]=1;
               dist[u.first][u.second]=dist[cur.first][cur.second]+1;
               q.push(u);
           }
       }
   }
 }
    void clear(ll n){
        for(int i=1;i<=n;i++){
                for(int j=1;j<=n;j++){
                    // cout<<bees[i][j]<<" ";
                    vis[i][j]=0;
                    dist[i][j]=1e9;
                }
            // cout<<'\n';
            }
        }
    bool ck(ll r, ll c, ll n, ll par, ll finr, ll finc, ll divi){
        clear(n);
        bfs(r,c,par,divi);
        if(vis[finr][finc]){
            return 1;
        }
        return 0;
    }
}gp3;
 
int main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0); cout.tie(0);
    ll n,s;
    cin>>n>>s;
    char arr[n+2][n+2];
gp2.init(n);
    for(int i=1;i<=n;i++){
        for(int j=1;j<=n;j++){
            cin>>arr[i][j];
        }
    }
    for(int i=1;i<=n;i++){
        for(int j=1;j<=n;j++){
            for(int k=0;k<4;k++){
                if(arr[i][j]=='M'||arr[i][j]=='G'||arr[i][j]=='D'){
                 if(arr[i+dx[k]][j+dy[k]]=='M'||arr[i+dx[k]][j+dy[k]]=='G'||arr[i+dx[k]][j+dy[k]]=='D'){
                     gp3.add_edge(i,j,i+dx[k],j+dy[k]);
                 }
                }
                if(arr[i][j]=='M'||arr[i][j]=='G'||arr[i][j]=='H'){
                 if(arr[i+dx[k]][j+dy[k]]=='M'||arr[i+dx[k]][j+dy[k]]=='G'||arr[i+dx[k]][j+dy[k]]=='H'){
                    gp2.add_edge(i,j,i+dx[k],j+dy[k]);
                 }
                }
            }
            if(arr[i][j]=='H'){
                pos.push_back({i,j});
            }
        }
    }
    gp2.bfs();
    pos.clear();
    ll startr,startc,endr,endc;
    for(int i=1;i<=n;i++){
        for(int j=1;j<=n;j++){
            if(arr[i][j]=='M'){
                startr=i,startc=j;
            }
            if(arr[i][j]=='D'){
                endr=i,endc=j;
            }
        }
    }
    for(int i=1;i<=n;i++){
        for(int j=1;j<=n;j++){
            gp3.bees[i][j]=gp2.dist[i][j];
            }
        }
    pos.clear();
    
    ll l=0,r=gp2.dist[startr][startc]-1;
    while(l<=r){
        if(l==r){
            break;
        }
        else if(l==r-1){
            if(gp3.ck(startr,startc,n,r,endr,endc,s)){
                l=r;
            }
            else{
                r=l;
            }
            break;
        }
        else{
            ll mid=(l+r)>>1;
            if(gp3.ck(startr,startc,n,mid,endr,endc,s)){
                l=mid;
            }
            else{
                r=mid;
            }
        }
    }
    // cout<<'\n';
    // cout<<l<<'\n';
    if(!gp3.ck(startr,startc,n,l,endr,endc,s)){
        cout<<"-1\n";
    }
    else{
        cout<<l<<'\n';
    }
}

Compilation message

mecho.cpp: In function 'int main()':
mecho.cpp:176:15: warning: 'startr' may be used uninitialized in this function [-Wmaybe-uninitialized]
  176 |     if(!gp3.ck(startr,startc,n,l,endr,endc,s)){
      |         ~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
mecho.cpp:176:15: warning: 'endr' may be used uninitialized in this function [-Wmaybe-uninitialized]
mecho.cpp:176:15: warning: 'endc' may be used uninitialized in this function [-Wmaybe-uninitialized]
mecho.cpp:176:15: warning: 'startc' may be used uninitialized in this function [-Wmaybe-uninitialized]

Subtask #1

58.0 / 100.0

#	결과	실행 시간	메모리	Grader output
1	Correct	11 ms	37212 KB	Output is correct
2	Correct	11 ms	37208 KB	Output is correct
3	Correct	11 ms	37264 KB	Output is correct
4	Correct	11 ms	37212 KB	Output is correct
5	Correct	10 ms	37052 KB	Output is correct
6	Correct	12 ms	37208 KB	Output is correct
7	Runtime error	72 ms	65536 KB	Execution killed with signal 9
8	Correct	11 ms	37284 KB	Output is correct
9	Correct	13 ms	37212 KB	Output is correct
10	Correct	11 ms	37208 KB	Output is correct
11	Correct	10 ms	37284 KB	Output is correct
12	Correct	12 ms	37212 KB	Output is correct
13	Correct	11 ms	37468 KB	Output is correct
14	Correct	12 ms	37468 KB	Output is correct
15	Correct	11 ms	37324 KB	Output is correct
16	Correct	12 ms	37212 KB	Output is correct
17	Correct	11 ms	37060 KB	Output is correct
18	Correct	12 ms	37208 KB	Output is correct
19	Correct	10 ms	37212 KB	Output is correct
20	Correct	12 ms	37316 KB	Output is correct
21	Correct	11 ms	37212 KB	Output is correct
22	Correct	12 ms	37208 KB	Output is correct
23	Correct	12 ms	37212 KB	Output is correct
24	Correct	12 ms	37212 KB	Output is correct
25	Correct	12 ms	37212 KB	Output is correct
26	Correct	12 ms	37188 KB	Output is correct
27	Correct	13 ms	37212 KB	Output is correct
28	Correct	12 ms	37212 KB	Output is correct
29	Correct	12 ms	37464 KB	Output is correct
30	Correct	11 ms	37212 KB	Output is correct
31	Correct	12 ms	37504 KB	Output is correct
32	Correct	12 ms	37468 KB	Output is correct
33	Correct	25 ms	43352 KB	Output is correct
34	Correct	29 ms	43612 KB	Output is correct
35	Correct	73 ms	47052 KB	Output is correct
36	Correct	28 ms	44632 KB	Output is correct
37	Correct	31 ms	44636 KB	Output is correct
38	Correct	142 ms	49548 KB	Output is correct
39	Correct	33 ms	45916 KB	Output is correct
40	Correct	32 ms	45912 KB	Output is correct
41	Correct	245 ms	52060 KB	Output is correct
42	Correct	37 ms	47704 KB	Output is correct
43	Correct	39 ms	47440 KB	Output is correct
44	Correct	325 ms	55124 KB	Output is correct
45	Correct	41 ms	49236 KB	Output is correct
46	Correct	43 ms	48980 KB	Output is correct
47	Correct	408 ms	58704 KB	Output is correct
48	Correct	47 ms	51032 KB	Output is correct
49	Correct	50 ms	51024 KB	Output is correct
50	Correct	499 ms	62288 KB	Output is correct
51	Correct	54 ms	53072 KB	Output is correct
52	Correct	56 ms	53072 KB	Output is correct
53	Runtime error	105 ms	65536 KB	Execution killed with signal 9
54	Correct	78 ms	55204 KB	Output is correct
55	Correct	62 ms	55172 KB	Output is correct
56	Runtime error	74 ms	65536 KB	Execution killed with signal 9
57	Correct	69 ms	57680 KB	Output is correct
58	Correct	72 ms	57424 KB	Output is correct
59	Runtime error	77 ms	65536 KB	Execution killed with signal 9
60	Correct	74 ms	59984 KB	Output is correct
61	Correct	76 ms	59988 KB	Output is correct
62	Runtime error	79 ms	65536 KB	Execution killed with signal 9
63	Runtime error	117 ms	65536 KB	Execution killed with signal 9
64	Runtime error	118 ms	65536 KB	Execution killed with signal 9
65	Runtime error	122 ms	65536 KB	Execution killed with signal 9
66	Runtime error	133 ms	65536 KB	Execution killed with signal 9
67	Runtime error	117 ms	65536 KB	Execution killed with signal 9
68	Runtime error	145 ms	65536 KB	Execution killed with signal 9
69	Runtime error	118 ms	65536 KB	Execution killed with signal 9
70	Runtime error	115 ms	65536 KB	Execution killed with signal 9
71	Runtime error	120 ms	65536 KB	Execution killed with signal 9
72	Runtime error	122 ms	65536 KB	Execution killed with signal 9
73	Runtime error	75 ms	65536 KB	Execution killed with signal 9
74	Runtime error	85 ms	65536 KB	Execution killed with signal 9
75	Runtime error	78 ms	65536 KB	Execution killed with signal 9
76	Runtime error	94 ms	65536 KB	Execution killed with signal 9
77	Runtime error	77 ms	65536 KB	Execution killed with signal 9
78	Runtime error	79 ms	65536 KB	Execution killed with signal 9
79	Runtime error	75 ms	65536 KB	Execution killed with signal 9
80	Runtime error	75 ms	65536 KB	Execution killed with signal 9
81	Runtime error	81 ms	65536 KB	Execution killed with signal 9
82	Runtime error	74 ms	65536 KB	Execution killed with signal 9
83	Runtime error	73 ms	65536 KB	Execution killed with signal 9
84	Runtime error	80 ms	65536 KB	Execution killed with signal 9
85	Runtime error	81 ms	65536 KB	Execution killed with signal 9
86	Runtime error	74 ms	65536 KB	Execution killed with signal 9
87	Runtime error	75 ms	65536 KB	Execution killed with signal 9
88	Runtime error	75 ms	65536 KB	Execution killed with signal 9
89	Runtime error	94 ms	65536 KB	Execution killed with signal 9
90	Runtime error	73 ms	65536 KB	Execution killed with signal 9
91	Runtime error	101 ms	65536 KB	Execution killed with signal 9
92	Runtime error	86 ms	65536 KB	Execution killed with signal 9