oj.uz

Submission #1097076

# Submission time Handle Problem Language Result Execution time Memory
1097076 2024-10-06T03:15:53 Z InvMOD Mecho (IOI09_mecho) C++14
0 / 100
 293 ms 7000 KB 
#include <bits/stdc++.h>
using namespace std;

#define fi first
#define se second
#define gcd __gcd
#define sz(v) (int) v.size()
#define pb push_back
#define pi pair<int,int>
#define all(v) (v).begin(), (v).end()
#define compact(v) (v).erase(unique(all(v)), (v).end())
#define FOR(i, a, b) for(int i = (a); i <= (b); i++)
///#define int long long

using ll = long long;
using ld = long double;
using ull = unsigned long long;

template<typename T> bool ckmx(T& a, const T& b){if(a < b) return a = b, true; return false;}
template<typename T> bool ckmn(T& a, const T& b){if(a > b) return a = b, true; return false;}

const int N = 8e2+5;
const ll MOD = 1e9+7;
const ll INF = 1e18;

const int dx[4] = {1, -1, 0, 0};
const int dy[4] = {0, 0, 1, -1};

int n, s, d[N][N], vis[N][N];
char a[N][N];

bool init(int x, int y){
    return (x >= 1 && x <= n) && (y >= 1 && y <= n) && a[x][y] != 'T';
}

bool good(int time){
    pi st, ed;
    FOR(i, 1, n){
        FOR(j, 1, n){
            if(a[i][j] == 'M'){
                st = make_pair(i,j);
                vis[i][j] = time*s;
            }
            else{
                if(a[i][j] == 'D'){
                    ed = make_pair(i, j);
                }
                vis[i][j] = n*n + time*s;
            }
        }
    }

    queue<pair<int,int>> q;
    q.push(st);

    while(sz(q)){
        pi e = q.front(); q.pop();

        int x = e.fi, y = e.se;
        for(int i = 0; i < 4; i++){
            int xx = x + dx[i];
            int yy = y + dy[i];
            if(init(xx, yy) && vis[xx][yy] == n*n + time*s && a[xx][yy] != 'H'){
                int n_dist = (vis[x][y] + 1) / s + ((vis[x][y]+1) % s != 0);
                if(n_dist <= d[xx][yy]){
                    vis[xx][yy] = vis[x][y] + 1;
                    q.push(make_pair(xx, yy));
                }
            }
        }
    }

    return vis[ed.fi][ed.se] != n*n + time*s;
}

void solve()
{
    cin >> n >> s;
    FOR(i, 1, n){
        FOR(j, 1, n){
            cin >> a[i][j];
        }
    }

    queue<pair<int,int>> q;

    FOR(i, 1, n){
        FOR(j, 1, n){
            if(a[i][j] == 'H'){
                q.push(make_pair(i,j));
            }
            else d[i][j] = n*n + n*n*s;
        }
    }

    while(sz(q)){
        pi e = q.front(); q.pop();

        int x = e.fi, y = e.se;
        for(int i = 0; i < 4; i++){
            int xx = x + dx[i];
            int yy = y + dy[i];
            if(init(xx, yy) && d[xx][yy] == n*n && a[xx][yy] != 'D'){
                d[xx][yy] = d[x][y] + 1;
                q.push(make_pair(xx, yy));
            }
        }
    }



    int l = -1, r = n*n+1;
    while(l+1 < r){
        int m = l+r>>1;
        if(good(m)){
            l = m;
        }
        else r = m;
    }
    cout << l <<"\n";
}

signed main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);

    #define name "InvMOD"
    if(fopen(name".INP", "r")){
        freopen(name".INP","r",stdin);
        freopen(name".OUT","w",stdout);
    }

    int t = 1; //cin >> t;
    while(t--) solve();
    return 0;
}

Compilation message

mecho.cpp: In function 'void solve()':
mecho.cpp:114:18: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  114 |         int m = l+r>>1;
      |                 ~^~
mecho.cpp: In function 'int main()':
mecho.cpp:131:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  131 |         freopen(name".INP","r",stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
mecho.cpp:132:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  132 |         freopen(name".OUT","w",stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
0.0 / 100.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 344 KB Output isn't correct
2 Incorrect 1 ms 344 KB Output isn't correct
3 Incorrect 0 ms 348 KB Output isn't correct
4 Incorrect 0 ms 348 KB Output isn't correct
5 Incorrect 0 ms 348 KB Output isn't correct
6 Incorrect 0 ms 464 KB Output isn't correct
7 Incorrect 219 ms 6612 KB Output isn't correct
8 Incorrect 1 ms 344 KB Output isn't correct
9 Incorrect 0 ms 348 KB Output isn't correct
10 Incorrect 1 ms 348 KB Output isn't correct
11 Incorrect 0 ms 348 KB Output isn't correct
12 Incorrect 1 ms 860 KB Output isn't correct
13 Incorrect 1 ms 604 KB Output isn't correct
14 Incorrect 1 ms 860 KB Output isn't correct
15 Incorrect 0 ms 604 KB Output isn't correct
16 Incorrect 0 ms 604 KB Output isn't correct
17 Incorrect 0 ms 604 KB Output isn't correct
18 Incorrect 0 ms 604 KB Output isn't correct
19 Incorrect 0 ms 604 KB Output isn't correct
20 Incorrect 1 ms 600 KB Output isn't correct
21 Incorrect 1 ms 604 KB Output isn't correct
22 Incorrect 0 ms 716 KB Output isn't correct
23 Incorrect 1 ms 604 KB Output isn't correct
24 Incorrect 1 ms 604 KB Output isn't correct
25 Incorrect 1 ms 860 KB Output isn't correct
26 Incorrect 1 ms 860 KB Output isn't correct
27 Incorrect 1 ms 860 KB Output isn't correct
28 Incorrect 1 ms 860 KB Output isn't correct
29 Incorrect 1 ms 860 KB Output isn't correct
30 Incorrect 1 ms 860 KB Output isn't correct
31 Incorrect 1 ms 856 KB Output isn't correct
32 Incorrect 1 ms 860 KB Output isn't correct
33 Incorrect 24 ms 3052 KB Output isn't correct
34 Incorrect 18 ms 3076 KB Output isn't correct
35 Incorrect 27 ms 2908 KB Output isn't correct
36 Incorrect 29 ms 3416 KB Output isn't correct
37 Incorrect 25 ms 3420 KB Output isn't correct
38 Incorrect 40 ms 3420 KB Output isn't correct
39 Incorrect 39 ms 3832 KB Output isn't correct
40 Incorrect 33 ms 3676 KB Output isn't correct
41 Incorrect 47 ms 3792 KB Output isn't correct
42 Incorrect 46 ms 4188 KB Output isn't correct
43 Incorrect 37 ms 4188 KB Output isn't correct
44 Incorrect 58 ms 4440 KB Output isn't correct
45 Incorrect 59 ms 4440 KB Output isn't correct
46 Incorrect 47 ms 4444 KB Output isn't correct
47 Incorrect 75 ms 4444 KB Output isn't correct
48 Incorrect 69 ms 4956 KB Output isn't correct
49 Incorrect 56 ms 4956 KB Output isn't correct
50 Incorrect 89 ms 4956 KB Output isn't correct
51 Incorrect 84 ms 5468 KB Output isn't correct
52 Incorrect 70 ms 5464 KB Output isn't correct
53 Incorrect 101 ms 5468 KB Output isn't correct
54 Incorrect 96 ms 5720 KB Output isn't correct
55 Incorrect 78 ms 5852 KB Output isn't correct
56 Incorrect 121 ms 5724 KB Output isn't correct
57 Incorrect 116 ms 6236 KB Output isn't correct
58 Incorrect 104 ms 6236 KB Output isn't correct
59 Incorrect 143 ms 6236 KB Output isn't correct
60 Incorrect 129 ms 6764 KB Output isn't correct
61 Incorrect 102 ms 6744 KB Output isn't correct
62 Incorrect 161 ms 6716 KB Output isn't correct
63 Incorrect 254 ms 6748 KB Output isn't correct
64 Incorrect 260 ms 6748 KB Output isn't correct
65 Incorrect 258 ms 6744 KB Output isn't correct
66 Incorrect 257 ms 6744 KB Output isn't correct
67 Incorrect 293 ms 6748 KB Output isn't correct
68 Incorrect 255 ms 6744 KB Output isn't correct
69 Incorrect 267 ms 6756 KB Output isn't correct
70 Incorrect 266 ms 6744 KB Output isn't correct
71 Incorrect 276 ms 6748 KB Output isn't correct
72 Incorrect 261 ms 6752 KB Output isn't correct
73 Incorrect 248 ms 6748 KB Output isn't correct
74 Incorrect 222 ms 6772 KB Output isn't correct
75 Incorrect 217 ms 6748 KB Output isn't correct
76 Incorrect 220 ms 6748 KB Output isn't correct
77 Incorrect 227 ms 6780 KB Output isn't correct
78 Incorrect 215 ms 6744 KB Output isn't correct
79 Incorrect 218 ms 6768 KB Output isn't correct
80 Incorrect 227 ms 6760 KB Output isn't correct
81 Incorrect 215 ms 7000 KB Output isn't correct
82 Incorrect 234 ms 6744 KB Output isn't correct
83 Incorrect 221 ms 6744 KB Output isn't correct
84 Incorrect 249 ms 6760 KB Output isn't correct
85 Incorrect 231 ms 6748 KB Output isn't correct
86 Incorrect 247 ms 6748 KB Output isn't correct
87 Incorrect 224 ms 6748 KB Output isn't correct
88 Incorrect 231 ms 6748 KB Output isn't correct
89 Incorrect 220 ms 6748 KB Output isn't correct
90 Incorrect 218 ms 6752 KB Output isn't correct
91 Incorrect 224 ms 6748 KB Output isn't correct
92 Incorrect 225 ms 6752 KB Output isn't correct