oj.uz

Submission #593256

# Submission time Handle Problem Language Result Execution time Memory
593256 2022-07-10T16:49:39 Z Bench0310 Mecho (IOI09_mecho) C++17
100 / 100
 374 ms 7184 KB 
#include <bits/stdc++.h>

using namespace std;
typedef long long ll;

int main()
{
    ios::sync_with_stdio(0);
    cin.tie(0);
    int n,one;
    cin >> n >> one;
    vector<string> s(n);
    array<int,2> bear;
    array<int,2> house;
    vector<array<int,2>> bees;
    for(int i=0;i<n;i++)
    {
        cin >> s[i];
        for(int j=0;j<n;j++)
        {
            if(s[i][j]=='M') bear={i,j};
            if(s[i][j]=='D') house={i,j};
            if(s[i][j]=='H') bees.push_back({i,j});
        }
    }
    auto in=[&](int r,int c)->bool{return (0<=r&&r<n&&0<=c&&c<n);};
    vector<array<int,2>> z={{1,0},{-1,0},{0,-1},{0,1}};
    int ltime=-1,rtime=n*n;
    while(ltime<rtime-1)
    {
        int m=(ltime+rtime)/2;
        queue<array<int,2>> qbees,qbear;
        vector dbee(n,vector(n,int(-1)));
        auto add_bee=[&](int r,int c,int nd)
        {
            if(in(r,c)&&s[r][c]!='T'&&s[r][c]!='D'&&dbee[r][c]==-1)
            {
                qbees.push({r,c});
                dbee[r][c]=nd;
            }
        };
        vector dbear(n,vector(n,int(-1)));
        auto add_bear=[&](int r,int c,int nd)
        {
            if(in(r,c)&&s[r][c]!='T'&&dbee[r][c]==-1&&dbear[r][c]==-1)
            {
                qbear.push({r,c});
                dbear[r][c]=nd;
            }
        };
        for(auto [r,c]:bees) add_bee(r,c,0);
        add_bear(bear[0],bear[1],0);
        for(int i=0;!qbear.empty();i++)
        {
            while(!qbear.empty())
            {
                auto [r,c]=qbear.front();
                int d=dbear[r][c];
                if(d<(i-m+1)*one)
                {
                    qbear.pop();
                    if(dbee[r][c]!=-1) continue;
                    for(auto [dr,dc]:z) add_bear(r+dr,c+dc,dbear[r][c]+1);
                }
                else break;
            }
            while(!qbees.empty())
            {
                auto [r,c]=qbees.front();
                int d=dbee[r][c];
                if(d<=i)
                {
                    qbees.pop();
                    for(auto [dr,dc]:z) add_bee(r+dr,c+dc,dbee[r][c]+1);
                }
                else break;
            }
        }
        if(dbear[house[0]][house[1]]!=-1) ltime=m;
        else rtime=m;
    }
    cout << ltime << "\n";
    return 0;
}

Compilation message

mecho.cpp: In function 'int main()':
mecho.cpp:79:36: warning: 'house.std::array<int, 2>::_M_elems[1]' may be used uninitialized in this function [-Wmaybe-uninitialized]
   79 |         if(dbear[house[0]][house[1]]!=-1) ltime=m;
      |                                    ^
mecho.cpp:13:18: warning: 'bear.std::array<int, 2>::_M_elems[0]' may be used uninitialized in this function [-Wmaybe-uninitialized]
   13 |     array<int,2> bear;
      |                  ^~~~
mecho.cpp:79:26: warning: 'house.std::array<int, 2>::_M_elems[0]' may be used uninitialized in this function [-Wmaybe-uninitialized]
   79 |         if(dbear[house[0]][house[1]]!=-1) ltime=m;
      |                          ^
mecho.cpp:13:18: warning: 'bear.std::array<int, 2>::_M_elems[1]' may be used uninitialized in this function [-Wmaybe-uninitialized]
   13 |     array<int,2> bear;
      |                  ^~~~

Subtask #1
100.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 304 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 1 ms 324 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 319 ms 6856 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 320 KB Output is correct
14 Correct 2 ms 340 KB Output is correct
15 Correct 0 ms 212 KB Output is correct
16 Correct 0 ms 212 KB Output is correct
17 Correct 1 ms 212 KB Output is correct
18 Correct 1 ms 212 KB Output is correct
19 Correct 1 ms 212 KB Output is correct
20 Correct 1 ms 212 KB Output is correct
21 Correct 1 ms 340 KB Output is correct
22 Correct 1 ms 340 KB Output is correct
23 Correct 1 ms 340 KB Output is correct
24 Correct 1 ms 340 KB Output is correct
25 Correct 1 ms 340 KB Output is correct
26 Correct 1 ms 340 KB Output is correct
27 Correct 1 ms 340 KB Output is correct
28 Correct 1 ms 340 KB Output is correct
29 Correct 2 ms 340 KB Output is correct
30 Correct 1 ms 340 KB Output is correct
31 Correct 2 ms 340 KB Output is correct
32 Correct 2 ms 328 KB Output is correct
33 Correct 29 ms 1548 KB Output is correct
34 Correct 32 ms 1588 KB Output is correct
35 Correct 40 ms 1564 KB Output is correct
36 Correct 41 ms 1960 KB Output is correct
37 Correct 39 ms 1988 KB Output is correct
38 Correct 49 ms 1876 KB Output is correct
39 Correct 56 ms 2384 KB Output is correct
40 Correct 49 ms 2372 KB Output is correct
41 Correct 65 ms 2352 KB Output is correct
42 Correct 67 ms 2880 KB Output is correct
43 Correct 78 ms 2892 KB Output is correct
44 Correct 81 ms 2832 KB Output is correct
45 Correct 85 ms 3364 KB Output is correct
46 Correct 74 ms 3360 KB Output is correct
47 Correct 104 ms 3356 KB Output is correct
48 Correct 100 ms 3960 KB Output is correct
49 Correct 91 ms 3944 KB Output is correct
50 Correct 111 ms 3940 KB Output is correct
51 Correct 119 ms 4560 KB Output is correct
52 Correct 116 ms 4704 KB Output is correct
53 Correct 155 ms 4544 KB Output is correct
54 Correct 139 ms 5240 KB Output is correct
55 Correct 126 ms 5232 KB Output is correct
56 Correct 188 ms 5296 KB Output is correct
57 Correct 158 ms 5948 KB Output is correct
58 Correct 144 ms 5956 KB Output is correct
59 Correct 199 ms 5952 KB Output is correct
60 Correct 196 ms 6724 KB Output is correct
61 Correct 166 ms 6728 KB Output is correct
62 Correct 227 ms 6712 KB Output is correct
63 Correct 339 ms 6836 KB Output is correct
64 Correct 335 ms 6652 KB Output is correct
65 Correct 330 ms 6880 KB Output is correct
66 Correct 359 ms 6716 KB Output is correct
67 Correct 345 ms 6900 KB Output is correct
68 Correct 327 ms 6740 KB Output is correct
69 Correct 319 ms 6860 KB Output is correct
70 Correct 323 ms 6740 KB Output is correct
71 Correct 374 ms 6752 KB Output is correct
72 Correct 369 ms 6740 KB Output is correct
73 Correct 245 ms 7000 KB Output is correct
74 Correct 343 ms 7024 KB Output is correct
75 Correct 341 ms 7004 KB Output is correct
76 Correct 339 ms 7152 KB Output is correct
77 Correct 314 ms 6996 KB Output is correct
78 Correct 337 ms 7048 KB Output is correct
79 Correct 318 ms 6984 KB Output is correct
80 Correct 348 ms 7116 KB Output is correct
81 Correct 329 ms 6920 KB Output is correct
82 Correct 338 ms 6932 KB Output is correct
83 Correct 332 ms 6936 KB Output is correct
84 Correct 331 ms 6936 KB Output is correct
85 Correct 372 ms 7072 KB Output is correct
86 Correct 340 ms 6932 KB Output is correct
87 Correct 368 ms 7184 KB Output is correct
88 Correct 333 ms 6856 KB Output is correct
89 Correct 330 ms 6880 KB Output is correct
90 Correct 321 ms 6876 KB Output is correct
91 Correct 343 ms 6900 KB Output is correct
92 Correct 356 ms 6872 KB Output is correct