oj.uz

Submission #91070

# Submission time Handle Problem Language Result Execution time Memory
91070 2018-12-26T06:33:48 Z Retro3014 Mecho (IOI09_mecho) C++17
26 / 100
 264 ms 35500 KB 
#include <iostream>
#include <algorithm>
#include <vector>
#include <string>
#include <deque>


#define MAX_N 800

struct S{
    int x, y;
    bool operator ==(const S &a)const{
        return (x==a.x) && (y==a.y);
    }
};

using namespace std;
int N, K;
string str[MAX_N+1];
bool type[MAX_N+1][MAX_N+1];
S M, D, H;
bool visited[MAX_N+1][MAX_N+1];
int dist[MAX_N+1][MAX_N+1];

bool chk(int t, int p){
    S tmp={t, p};
    if(tmp.x<0 || tmp.x>=N || tmp.y<0 || tmp.y>=N)  return false;
    if(visited[t][p])   return false;
    if(type[t][p]==1)   return false;
    return true;
}

int dx[4]={0, 0, 1, -1}, dy[4]={1, -1, 0, 0};
deque<S> dq;
void BFS(){
    dq.push_back(H);
    visited[H.x][H.y]=true;
    while(!dq.empty()){
        S now = dq.front();
        dq.pop_front();
        for(int k=0; k<4; k++){
            if(chk(now.x+dx[k], now.y+dy[k])){
                dist[now.x+dx[k]][now.y+dy[k]]=dist[now.x][now.y]+1;
                visited[now.x+dx[k]][now.y+dy[k]]=true;
                dq.push_back({now.x+dx[k], now.y+dy[k]});
            }
        }
    }
    for(int i=0; i<N; i++){
        for(int j=0; j<N; j++){
            visited[i][j]=false;
        }
    }
}

bool can(int T){
    for(int i=0; i<N; i++){
        for(int j=0; j<N; j++){
            visited[i][j]=false;
        }
    }
    int t=0;
    dq.clear();
    dq.push_back(M);
    visited[M.x][M.y]=true;
    while(!dq.empty()){
        int sz=(int)dq.size();
        while(sz--){
            S now = dq.front();
            dq.pop_front();
            if(dist[now.x][now.y]>T){
                if(now==D)  return true;
                for(int k=0; k<4; k++){
                    if(chk(now.x+dx[k], now.y+dy[k]) && dist[now.x+dx[k]][now.y+dy[k]]>T){
                        visited[now.x+dx[k]][now.y+dy[k]]=true;
                        dq.push_back({now.x+dx[k], now.y+dy[k]});
                    }
                }
            }
        }
        t++;
        if(t==K){
            t=0; T++;
        }
    }
    return false;
}

int main(){
    scanf("%d%d", &N, &K);
    for(int i=0; i<N; i++){
        cin>>str[i];
        for(int j=0; j<N; j++){
            if(str[i][j]=='T')  type[i][j]=1;
            else if(str[i][j]=='M')    M={i, j};
            else if(str[i][j]=='D')    D={i, j};
            else if(str[i][j]=='H')    H={i, j};
        }
    }
    BFS();
    int s=1, e=N*N+1, mid;
    while(s<e){
        if(s==e-1){
            if(can(e)){
                s=e;
            }else{
                e=s;
            }
        }else{
            mid=(s+e)/2;
            if(can(mid)){
                s=mid;
            }else{
                e=mid-1;
            }
        }
    }
    printf("%d", s);
    return 0;
}

Compilation message

mecho.cpp: In function 'int main()':
mecho.cpp:90:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d%d", &N, &K);
     ~~~~~^~~~~~~~~~~~~~~~

Subtask #1
26.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 504 KB Output is correct
3 Correct 2 ms 504 KB Output is correct
4 Incorrect 2 ms 508 KB Output isn't correct
5 Incorrect 1 ms 532 KB Output isn't correct
6 Correct 2 ms 536 KB Output is correct
7 Incorrect 186 ms 5660 KB Output isn't correct
8 Incorrect 2 ms 5660 KB Output isn't correct
9 Correct 2 ms 5660 KB Output is correct
10 Incorrect 2 ms 5660 KB Output isn't correct
11 Incorrect 2 ms 5660 KB Output isn't correct
12 Incorrect 2 ms 5660 KB Output isn't correct
13 Incorrect 2 ms 5660 KB Output isn't correct
14 Incorrect 2 ms 5660 KB Output isn't correct
15 Correct 2 ms 5660 KB Output is correct
16 Correct 2 ms 5660 KB Output is correct
17 Correct 2 ms 5660 KB Output is correct
18 Correct 2 ms 5660 KB Output is correct
19 Correct 2 ms 5660 KB Output is correct
20 Correct 2 ms 5660 KB Output is correct
21 Correct 2 ms 5660 KB Output is correct
22 Correct 2 ms 5660 KB Output is correct
23 Correct 2 ms 5660 KB Output is correct
24 Correct 2 ms 5660 KB Output is correct
25 Correct 2 ms 5660 KB Output is correct
26 Correct 2 ms 5660 KB Output is correct
27 Correct 2 ms 5660 KB Output is correct
28 Correct 2 ms 5660 KB Output is correct
29 Correct 2 ms 5660 KB Output is correct
30 Correct 2 ms 5660 KB Output is correct
31 Correct 2 ms 5660 KB Output is correct
32 Correct 3 ms 5660 KB Output is correct
33 Correct 9 ms 5660 KB Output is correct
34 Correct 12 ms 5660 KB Output is correct
35 Incorrect 30 ms 5660 KB Output isn't correct
36 Correct 11 ms 5660 KB Output is correct
37 Correct 15 ms 5660 KB Output is correct
38 Incorrect 36 ms 5660 KB Output isn't correct
39 Correct 13 ms 5660 KB Output is correct
40 Correct 20 ms 5660 KB Output is correct
41 Incorrect 48 ms 5660 KB Output isn't correct
42 Correct 16 ms 6088 KB Output is correct
43 Correct 21 ms 6364 KB Output is correct
44 Incorrect 62 ms 6584 KB Output isn't correct
45 Correct 20 ms 7088 KB Output is correct
46 Correct 81 ms 7488 KB Output is correct
47 Incorrect 69 ms 7680 KB Output isn't correct
48 Correct 21 ms 8360 KB Output is correct
49 Correct 36 ms 8716 KB Output is correct
50 Incorrect 85 ms 9072 KB Output isn't correct
51 Correct 25 ms 9812 KB Output is correct
52 Correct 39 ms 10228 KB Output is correct
53 Incorrect 101 ms 10644 KB Output isn't correct
54 Correct 27 ms 11320 KB Output is correct
55 Correct 50 ms 11800 KB Output is correct
56 Incorrect 141 ms 12408 KB Output isn't correct
57 Correct 32 ms 13272 KB Output is correct
58 Correct 48 ms 13696 KB Output is correct
59 Incorrect 143 ms 14248 KB Output isn't correct
60 Correct 36 ms 15184 KB Output is correct
61 Correct 58 ms 15828 KB Output is correct
62 Incorrect 172 ms 16584 KB Output isn't correct
63 Incorrect 165 ms 17140 KB Output isn't correct
64 Incorrect 252 ms 17712 KB Output isn't correct
65 Incorrect 160 ms 18344 KB Output isn't correct
66 Incorrect 177 ms 19096 KB Output isn't correct
67 Incorrect 134 ms 19596 KB Output isn't correct
68 Incorrect 264 ms 20296 KB Output isn't correct
69 Incorrect 228 ms 20852 KB Output isn't correct
70 Incorrect 201 ms 21480 KB Output isn't correct
71 Incorrect 239 ms 22236 KB Output isn't correct
72 Incorrect 55 ms 22712 KB Output isn't correct
73 Incorrect 185 ms 23380 KB Output isn't correct
74 Incorrect 200 ms 24136 KB Output isn't correct
75 Incorrect 173 ms 24712 KB Output isn't correct
76 Incorrect 181 ms 25280 KB Output isn't correct
77 Incorrect 206 ms 25948 KB Output isn't correct
78 Incorrect 237 ms 26680 KB Output isn't correct
79 Incorrect 93 ms 27344 KB Output isn't correct
80 Incorrect 112 ms 27900 KB Output isn't correct
81 Incorrect 85 ms 28476 KB Output isn't correct
82 Incorrect 174 ms 29100 KB Output isn't correct
83 Incorrect 89 ms 29728 KB Output isn't correct
84 Incorrect 76 ms 30428 KB Output isn't correct
85 Incorrect 76 ms 31000 KB Output isn't correct
86 Incorrect 184 ms 31612 KB Output isn't correct
87 Incorrect 79 ms 32368 KB Output isn't correct
88 Incorrect 93 ms 32868 KB Output isn't correct
89 Incorrect 80 ms 33500 KB Output isn't correct
90 Incorrect 80 ms 34124 KB Output isn't correct
91 Incorrect 82 ms 34752 KB Output isn't correct
92 Incorrect 76 ms 35500 KB Output isn't correct