답안 #53563

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
53563 2018-06-30T08:19:52 Z 노영훈(#1418) Mecho (IOI09_mecho) C++11
31 / 100
228 ms 6528 KB
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef pair<int, int> pii;
const int MX=810, inf=2e9;

int n, s;
char B[MX][MX];
int xs, ys, xl, yl;
int dx[4]={0,1,0,-1};
int dy[4]={1,0,-1,0};
int Y[MX][MX];

bool valid(int x, int y){
    return 1<=x && x<=n && 1<=y && y<=n && (B[x][y]=='G' || B[x][y]=='H');
}

void bees(){
    queue<pii> Q;
    for(int i=1; i<=n; i++)
        for(int j=1; j<=n; j++){
            if(B[i][j]=='H') Y[i][j]=0, Q.push({i,j});
            else Y[i][j]=-1;
        }
    while(!Q.empty()){
        pii p=Q.front(); Q.pop();
        int x,y; tie(x,y)=p;
        for(int k=0; k<4; k++){
            int u=x+dx[k], v=y+dy[k];
            if(!valid(u,v) || Y[u][v]>=0) continue;
            Y[u][v]=Y[x][y]+1;
            Q.push({u,v});
        }
    }
}

int D[MX][MX]={};

bool solve(int t){
    for(int i=1; i<=n; i++)
        for(int j=1; j<=n; j++)
            D[i][j]=-1;
    queue<pii> Q;
    D[xs][ys]=0;
    Q.push({xs,ys});
    while(!Q.empty()){
        int x,y; tie(x,y)=Q.front(); Q.pop();
        for(int k=0; k<4; k++){
            int u=x+dx[k], v=y+dy[k];
            if(!valid(u,v) || D[u][v]>=0) continue;
            int now=t+(D[x][y]+1)/s;
            if(Y[u][v]>=0 && now>=Y[u][v]) continue;
            D[u][v]=D[x][y]+1;
            Q.push({u,v});
        }
    }
    /*
    cout<<"\nSOLVED "<<t<<'\n';
    for(int i=1; i<=n; i++, cout<<'\n')
        for(int j=1; j<=n; j++)
            cout<<D[i][j]<<' ';
            */
    return D[xl][yl]>=0;
}


int main(){
    ios::sync_with_stdio(0); cin.tie(0);
    cin>>n>>s;
    for(int i=1; i<=n; i++)
        for(int j=1; j<=n; j++){
            cin>>B[i][j];
            if(B[i][j]=='M') xs=i, ys=j, B[i][j]='G';
            if(B[i][j]=='D') xl=i, yl=j, B[i][j]='G';
        }
    bees();
    int s=0, e=2*n;
    while(s<e){
        int m=(s+e+1)/2;
        if(solve(m)) s=m;
        else e=m-1;
    }
    cout<<(solve(s) ? s : -1);
    return 0;
}
# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 376 KB Output is correct
2 Incorrect 3 ms 376 KB Output isn't correct
3 Correct 2 ms 560 KB Output is correct
4 Incorrect 2 ms 560 KB Output isn't correct
5 Correct 2 ms 560 KB Output is correct
6 Incorrect 2 ms 672 KB Output isn't correct
7 Incorrect 118 ms 6460 KB Output isn't correct
8 Correct 1 ms 6460 KB Output is correct
9 Correct 2 ms 6460 KB Output is correct
10 Correct 2 ms 6460 KB Output is correct
11 Correct 2 ms 6460 KB Output is correct
12 Incorrect 2 ms 6460 KB Output isn't correct
13 Incorrect 2 ms 6460 KB Output isn't correct
14 Correct 3 ms 6460 KB Output is correct
15 Incorrect 2 ms 6460 KB Output isn't correct
16 Incorrect 2 ms 6460 KB Output isn't correct
17 Incorrect 2 ms 6460 KB Output isn't correct
18 Incorrect 2 ms 6460 KB Output isn't correct
19 Incorrect 2 ms 6460 KB Output isn't correct
20 Incorrect 2 ms 6460 KB Output isn't correct
21 Incorrect 2 ms 6460 KB Output isn't correct
22 Incorrect 2 ms 6460 KB Output isn't correct
23 Incorrect 2 ms 6460 KB Output isn't correct
24 Incorrect 2 ms 6460 KB Output isn't correct
25 Incorrect 3 ms 6460 KB Output isn't correct
26 Incorrect 2 ms 6460 KB Output isn't correct
27 Incorrect 3 ms 6460 KB Output isn't correct
28 Incorrect 3 ms 6460 KB Output isn't correct
29 Incorrect 3 ms 6460 KB Output isn't correct
30 Incorrect 3 ms 6460 KB Output isn't correct
31 Incorrect 3 ms 6460 KB Output isn't correct
32 Incorrect 3 ms 6460 KB Output isn't correct
33 Incorrect 16 ms 6460 KB Output isn't correct
34 Incorrect 23 ms 6460 KB Output isn't correct
35 Correct 29 ms 6460 KB Output is correct
36 Incorrect 21 ms 6460 KB Output isn't correct
37 Incorrect 33 ms 6460 KB Output isn't correct
38 Correct 37 ms 6460 KB Output is correct
39 Incorrect 30 ms 6460 KB Output isn't correct
40 Incorrect 40 ms 6460 KB Output isn't correct
41 Correct 48 ms 6460 KB Output is correct
42 Incorrect 31 ms 6460 KB Output isn't correct
43 Incorrect 45 ms 6460 KB Output isn't correct
44 Correct 68 ms 6460 KB Output is correct
45 Incorrect 57 ms 6460 KB Output isn't correct
46 Incorrect 59 ms 6460 KB Output isn't correct
47 Correct 74 ms 6460 KB Output is correct
48 Incorrect 49 ms 6460 KB Output isn't correct
49 Incorrect 67 ms 6460 KB Output isn't correct
50 Correct 93 ms 6460 KB Output is correct
51 Incorrect 57 ms 6460 KB Output isn't correct
52 Incorrect 81 ms 6460 KB Output isn't correct
53 Correct 124 ms 6460 KB Output is correct
54 Incorrect 65 ms 6460 KB Output isn't correct
55 Incorrect 88 ms 6460 KB Output isn't correct
56 Correct 166 ms 6460 KB Output is correct
57 Incorrect 70 ms 6460 KB Output isn't correct
58 Incorrect 109 ms 6460 KB Output isn't correct
59 Correct 198 ms 6460 KB Output is correct
60 Incorrect 83 ms 6460 KB Output isn't correct
61 Incorrect 124 ms 6460 KB Output isn't correct
62 Correct 197 ms 6460 KB Output is correct
63 Correct 127 ms 6460 KB Output is correct
64 Correct 201 ms 6460 KB Output is correct
65 Correct 228 ms 6460 KB Output is correct
66 Correct 209 ms 6460 KB Output is correct
67 Correct 178 ms 6460 KB Output is correct
68 Correct 97 ms 6460 KB Output is correct
69 Correct 68 ms 6460 KB Output is correct
70 Correct 66 ms 6472 KB Output is correct
71 Correct 55 ms 6472 KB Output is correct
72 Incorrect 46 ms 6472 KB Output isn't correct
73 Incorrect 84 ms 6488 KB Output isn't correct
74 Correct 94 ms 6488 KB Output is correct
75 Correct 124 ms 6496 KB Output is correct
76 Correct 132 ms 6496 KB Output is correct
77 Correct 132 ms 6496 KB Output is correct
78 Correct 133 ms 6496 KB Output is correct
79 Correct 85 ms 6496 KB Output is correct
80 Correct 98 ms 6528 KB Output is correct
81 Correct 112 ms 6528 KB Output is correct
82 Correct 90 ms 6528 KB Output is correct
83 Correct 117 ms 6528 KB Output is correct
84 Correct 113 ms 6528 KB Output is correct
85 Correct 137 ms 6528 KB Output is correct
86 Correct 130 ms 6528 KB Output is correct
87 Correct 100 ms 6528 KB Output is correct
88 Correct 111 ms 6528 KB Output is correct
89 Correct 124 ms 6528 KB Output is correct
90 Correct 137 ms 6528 KB Output is correct
91 Correct 161 ms 6528 KB Output is correct
92 Correct 131 ms 6528 KB Output is correct