oj.uz

Submission #444684

# Submission time Handle Problem Language Result Execution time Memory
444684 2021-07-14T18:50:30 Z Deepesson Mecho (IOI09_mecho) C++17
100 / 100
 554 ms 4480 KB 
#include <bits/stdc++.h>
#define MAX 850
std::string mapa[MAX];
typedef std::pair<int,int> pii;
bool proibido[MAX][MAX]={},nobees[MAX][MAX]={};
int N,K;
typedef std::pair<int,pii> pip;
std::vector<pii> hon;
void avancar(void) {
    std::vector<pii> honfut;
    for(auto&x:hon) {
        #define PUSH(A,B) if(A>=0&&B>=0&&A<N&&B<N&&!proibido[A][B]&&!nobees[A][B]){proibido[A][B]=true;honfut.push_back({A,B});}
        PUSH(x.first+1,x.second);
        PUSH(x.first-1,x.second);
        PUSH(x.first,x.second+1);
        PUSH(x.first,x.second-1);
    }
    hon=honfut;
}
bool vis[MAX][MAX]={};
bool testar(int x,int s) {
    hon.clear();
    memset(&proibido[0][0],0,sizeof(proibido));
    memset(&nobees[0][0],0,sizeof(nobees));
    memset(&vis[0][0],0,sizeof(vis));
    pii inicio,fim;
    for(int i=0;i!=N;++i){
        for(int j=0;j!=N;++j){
            if(mapa[i][j]=='H'){
                proibido[i][j]=true;
                hon.push_back({i,j});
            }else if(mapa[i][j]=='M') {
                inicio={i,j};
            }else if(mapa[i][j]=='D') {
                nobees[i][j]=true;
                fim={i,j};
            }else if(mapa[i][j]=='T'){
                nobees[i][j]=true;
                proibido[i][j]=true;
            }
        }
    }
    for(int i=0;i!=x;++i)avancar();
    std::queue<pip> queue;
    queue.push({0,inicio});
    int laste=0;
    while(queue.size()) {
        auto _ = queue.front();
        queue.pop();
        int mov = _.first/s;
        if(mov>laste){
            laste=mov;
            avancar();
        }
        if(vis[_.second.first][_.second.second]||proibido[_.second.first][_.second.second])continue;
        vis[_.second.first][_.second.second]=true;
        if(_.second==fim)return true;
        #define QPUSH(A,B) if(A>=0&&B>=0&&A<N&&B<N)queue.push({_.first+1,{A,B}});
        QPUSH(_.second.first+1,_.second.second);
        QPUSH(_.second.first-1,_.second.second);
        QPUSH(_.second.first,_.second.second+1);
        QPUSH(_.second.first,_.second.second-1);
    }
    return false;
}
int main()
{
    std::cin>>N>>K;
    for(int i=0;i!=N;++i)std::cin>>mapa[i];
    if(!testar(0,K)) {
        std::cout<<-1<<"\n";
        return 0;
    }
    int l=0,r=N*N;
    while(l<r) {
        int m = (l+r)/2 + ((l+r)&1);
        if(testar(m,K)) {
            l=m;
        }else r=m-1;
    }
    std::cout<<l<<"\n";
}

Subtask #1
100.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 2380 KB Output is correct
2 Correct 2 ms 2380 KB Output is correct
3 Correct 2 ms 2344 KB Output is correct
4 Correct 2 ms 2380 KB Output is correct
5 Correct 2 ms 2380 KB Output is correct
6 Correct 2 ms 2380 KB Output is correct
7 Correct 411 ms 3788 KB Output is correct
8 Correct 1 ms 2380 KB Output is correct
9 Correct 2 ms 2380 KB Output is correct
10 Correct 2 ms 2380 KB Output is correct
11 Correct 2 ms 2380 KB Output is correct
12 Correct 3 ms 2380 KB Output is correct
13 Correct 3 ms 2380 KB Output is correct
14 Correct 2 ms 2380 KB Output is correct
15 Correct 2 ms 2380 KB Output is correct
16 Correct 3 ms 2380 KB Output is correct
17 Correct 2 ms 2380 KB Output is correct
18 Correct 2 ms 2380 KB Output is correct
19 Correct 3 ms 2380 KB Output is correct
20 Correct 3 ms 2380 KB Output is correct
21 Correct 3 ms 2380 KB Output is correct
22 Correct 3 ms 2380 KB Output is correct
23 Correct 3 ms 2380 KB Output is correct
24 Correct 3 ms 2380 KB Output is correct
25 Correct 4 ms 2400 KB Output is correct
26 Correct 3 ms 2380 KB Output is correct
27 Correct 4 ms 2380 KB Output is correct
28 Correct 4 ms 2380 KB Output is correct
29 Correct 5 ms 2380 KB Output is correct
30 Correct 4 ms 2380 KB Output is correct
31 Correct 4 ms 2380 KB Output is correct
32 Correct 4 ms 2444 KB Output is correct
33 Correct 49 ms 2508 KB Output is correct
34 Correct 46 ms 2508 KB Output is correct
35 Correct 81 ms 2640 KB Output is correct
36 Correct 77 ms 2632 KB Output is correct
37 Correct 65 ms 2508 KB Output is correct
38 Correct 102 ms 2668 KB Output is correct
39 Correct 81 ms 2640 KB Output is correct
40 Correct 87 ms 2652 KB Output is correct
41 Correct 130 ms 2700 KB Output is correct
42 Correct 130 ms 2900 KB Output is correct
43 Correct 108 ms 2896 KB Output is correct
44 Correct 158 ms 3056 KB Output is correct
45 Correct 132 ms 2948 KB Output is correct
46 Correct 148 ms 2948 KB Output is correct
47 Correct 185 ms 3004 KB Output is correct
48 Correct 144 ms 3012 KB Output is correct
49 Correct 161 ms 3004 KB Output is correct
50 Correct 235 ms 3056 KB Output is correct
51 Correct 176 ms 3020 KB Output is correct
52 Correct 178 ms 3020 KB Output is correct
53 Correct 275 ms 3112 KB Output is correct
54 Correct 218 ms 3100 KB Output is correct
55 Correct 203 ms 3084 KB Output is correct
56 Correct 310 ms 3148 KB Output is correct
57 Correct 303 ms 3132 KB Output is correct
58 Correct 232 ms 3136 KB Output is correct
59 Correct 371 ms 3196 KB Output is correct
60 Correct 273 ms 3148 KB Output is correct
61 Correct 283 ms 3180 KB Output is correct
62 Correct 418 ms 3264 KB Output is correct
63 Correct 409 ms 3204 KB Output is correct
64 Correct 554 ms 3128 KB Output is correct
65 Correct 471 ms 3320 KB Output is correct
66 Correct 460 ms 3204 KB Output is correct
67 Correct 44 ms 3148 KB Output is correct
68 Correct 331 ms 3328 KB Output is correct
69 Correct 295 ms 3396 KB Output is correct
70 Correct 331 ms 3276 KB Output is correct
71 Correct 320 ms 3276 KB Output is correct
72 Correct 319 ms 3400 KB Output is correct
73 Correct 254 ms 4476 KB Output is correct
74 Correct 374 ms 4460 KB Output is correct
75 Correct 397 ms 4472 KB Output is correct
76 Correct 417 ms 4480 KB Output is correct
77 Correct 393 ms 4480 KB Output is correct
78 Correct 50 ms 4352 KB Output is correct
79 Correct 375 ms 4136 KB Output is correct
80 Correct 370 ms 4376 KB Output is correct
81 Correct 394 ms 4332 KB Output is correct
82 Correct 373 ms 4280 KB Output is correct
83 Correct 414 ms 4264 KB Output is correct
84 Correct 437 ms 4092 KB Output is correct
85 Correct 413 ms 4284 KB Output is correct
86 Correct 421 ms 4260 KB Output is correct
87 Correct 405 ms 4272 KB Output is correct
88 Correct 403 ms 3984 KB Output is correct
89 Correct 441 ms 4068 KB Output is correct
90 Correct 458 ms 4004 KB Output is correct
91 Correct 442 ms 4080 KB Output is correct
92 Correct 403 ms 3984 KB Output is correct