oj.uz

Submission #386172

# Submission time Handle Problem Language Result Execution time Memory
386172 2021-04-06T00:07:23 Z ignaciocanta Mecho (IOI09_mecho) C++14
29 / 100
 191 ms 7788 KB 
#include <bits/stdc++.h>
 
using namespace std;
 
using tint = long long;
using ld = long double;
 
#define FOR(i,a,b) for (int i = (a); i < (b); ++i)
#define F0R(i,a) FOR(i,0,a)
#define ROF(i,a,b) for (int i = (b)-1; i >= (a); --i)
#define R0F(i,a) ROF(i,0,a)
#define trav(a,x) for (auto& a: x)
 
using pi = pair<int,int>;
using pl = pair<tint,tint>;
using vi = vector<int>;
using vpi = vector<pi>;
using vpl = vector<pl>;
using vvi = vector<vi>;
using vl = vector<tint>;
using vb = vector<bool>;
 
#define pb push_back
#define pf push_front
#define rsz resize
#define all(x) begin(x), end(x)
#define rall(x) x.rbegin(), x.rend() 
#define sz(x) (int)(x).size()
#define ins insert
 
#define f first
#define s second
#define mp make_pair
 
#define DBG(x) cerr << #x << " = " << x << endl;
 
const int MOD = 1e9+9; //change this
const tint mod = 998244353;
const int MX = 805;
const tint INF = 1e18; 
const int inf = 2e9;
const ld PI = acos(ld(-1)); 
const ld eps = 1e-5;
 
const int dx[4] = {1, -1, 0, 0};
const int dy[4] = {0, 0, 1, -1};
 
template<class T> void remDup(vector<T> &v){ 
    sort(all(v)); v.erase(unique(all(v)),end(v));
}
 
template<class T> bool ckmin(T& a, const T& b) {
    return b < a ? a = b, 1 : 0; 
} 
template<class T> bool ckmax(T& a, const T& b) {
    return a < b ? a = b, 1 : 0; 
}
 
bool valid(int x, int y, int n, int m){
    return (0<=x && x<n && 0<=y && y<m);
}
 
int cdiv(int a, int b) { return a/b+((a^b)>0&&a%b); } //redondea p arriba
int fdiv(int a, int b) { return a/b-((a^b)<0&&a%b); } //redondea p abajo
 
void NACHO(string name = ""){
    ios_base::sync_with_stdio(0); cin.tie(0);
    if(sz(name)){
        freopen((name+".in").c_str(), "r", stdin);
        freopen((name+".out").c_str(), "w", stdout);
    }
}

string a[MX];
int x, y, sx, sy;
int dist[MX][MX];
int distM[MX][MX];
bool vis[MX][MX];
int n, s;

void bfs(){
	queue<pi> q;
	F0R(i, n){
		F0R(j, n){
			dist[i][j] = inf;
			if(a[i][j] == 'H'){
				dist[i][j] = 0;
				vis[i][j] = 1;
				q.push(mp(i, j));
			}
		}
	}
	while(sz(q)){
		auto u = q.front(); q.pop();
		F0R(k, 4){
			int xx = u.f+dx[k], yy = u.s+dy[k];
			if(valid(xx, yy, n, n) && !vis[xx][yy] && a[xx][yy] == 'G'){
				dist[xx][yy] = dist[u.f][u.s]+1;
				vis[xx][yy] = 1;
				q.push(mp(xx, yy));
			}
		}
	}
}

bool bee[MX][MX];

bool can(int m){
	F0R(i, n) F0R(j, n) vis[i][j] = 0;
	vis[x][y] = 1;
	queue<pi> q;
	q.push(mp(x, y));
	while(sz(q)){
		auto u = q.front(); q.pop();
		F0R(k, 4){
			int xx = u.f+dx[k], yy = u.s+dy[k];
			if(valid(xx, yy, n, n) && !vis[xx][yy] && (a[xx][yy] == 'G' || a[xx][yy] == 'D') && (distM[u.f][u.s]+(distM[u.f][u.s]%s != 0))/s < max(0, dist[xx][yy]-m)){
				distM[xx][yy] = distM[u.f][u.s]+1;
				vis[xx][yy] = 1;
				q.push(mp(xx, yy));
			}
		}
	}
	return vis[sx][sy];
}

int main(){
	NACHO();
	cin >> n >> s;
	F0R(i, n){
		cin >> a[i];
		F0R(j, n){
			if(a[i][j] == 'M') x = i, y = j;
			if(a[i][j] == 'D') sx = i, sy = j;
		}
	}
	bfs();
	int low = 0, high = 2*MX+5;
	while(high-low > 1){
		int mid = low+(high-low)/2;
		if(can(mid)) low = mid;
		else high = mid;
	}
	cout << low << "\n";
}
/*
7 3
TTTTTTT 
TGGGGGT 
TGGGGGT 
MGGGGGD 
TGGGGGT 
TGGGGGT 
THHHHHT
*/

Compilation message

mecho.cpp: In function 'void NACHO(std::string)':
mecho.cpp:69:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   69 |         freopen((name+".in").c_str(), "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
mecho.cpp:70:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   70 |         freopen((name+".out").c_str(), "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
29.0 / 100.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 364 KB Output isn't correct
2 Incorrect 1 ms 364 KB Output isn't correct
3 Incorrect 1 ms 364 KB Output isn't correct
4 Incorrect 1 ms 364 KB Output isn't correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 1 ms 512 KB Output is correct
7 Correct 105 ms 6380 KB Output is correct
8 Incorrect 1 ms 492 KB Output isn't correct
9 Correct 1 ms 492 KB Output is correct
10 Correct 1 ms 492 KB Output is correct
11 Correct 1 ms 492 KB Output is correct
12 Incorrect 1 ms 620 KB Output isn't correct
13 Incorrect 2 ms 620 KB Output isn't correct
14 Incorrect 2 ms 748 KB Output isn't correct
15 Incorrect 2 ms 492 KB Output isn't correct
16 Correct 1 ms 492 KB Output is correct
17 Incorrect 1 ms 492 KB Output isn't correct
18 Correct 1 ms 492 KB Output is correct
19 Incorrect 2 ms 492 KB Output isn't correct
20 Correct 1 ms 620 KB Output is correct
21 Incorrect 1 ms 620 KB Output isn't correct
22 Correct 1 ms 620 KB Output is correct
23 Incorrect 2 ms 620 KB Output isn't correct
24 Correct 2 ms 620 KB Output is correct
25 Incorrect 1 ms 748 KB Output isn't correct
26 Correct 1 ms 620 KB Output is correct
27 Incorrect 2 ms 748 KB Output isn't correct
28 Correct 2 ms 748 KB Output is correct
29 Incorrect 2 ms 768 KB Output isn't correct
30 Correct 1 ms 748 KB Output is correct
31 Incorrect 2 ms 748 KB Output isn't correct
32 Correct 2 ms 748 KB Output is correct
33 Incorrect 17 ms 2540 KB Output isn't correct
34 Incorrect 26 ms 3052 KB Output isn't correct
35 Correct 28 ms 3052 KB Output is correct
36 Incorrect 21 ms 2924 KB Output isn't correct
37 Incorrect 33 ms 3564 KB Output isn't correct
38 Correct 37 ms 3564 KB Output is correct
39 Incorrect 26 ms 3308 KB Output isn't correct
40 Incorrect 42 ms 3948 KB Output isn't correct
41 Correct 50 ms 3948 KB Output is correct
42 Incorrect 33 ms 3692 KB Output isn't correct
43 Incorrect 52 ms 4460 KB Output isn't correct
44 Correct 63 ms 4460 KB Output is correct
45 Incorrect 39 ms 4076 KB Output isn't correct
46 Incorrect 62 ms 4844 KB Output isn't correct
47 Correct 87 ms 4844 KB Output is correct
48 Incorrect 46 ms 4460 KB Output isn't correct
49 Incorrect 73 ms 5356 KB Output isn't correct
50 Correct 102 ms 5488 KB Output is correct
51 Incorrect 54 ms 4972 KB Output isn't correct
52 Incorrect 91 ms 5868 KB Output isn't correct
53 Correct 108 ms 5996 KB Output is correct
54 Incorrect 62 ms 5228 KB Output isn't correct
55 Incorrect 101 ms 6380 KB Output isn't correct
56 Correct 128 ms 6380 KB Output is correct
57 Incorrect 71 ms 5740 KB Output isn't correct
58 Incorrect 116 ms 7168 KB Output isn't correct
59 Correct 152 ms 6892 KB Output is correct
60 Incorrect 82 ms 6124 KB Output isn't correct
61 Incorrect 133 ms 7404 KB Output isn't correct
62 Correct 191 ms 7532 KB Output is correct
63 Correct 108 ms 7404 KB Output is correct
64 Correct 148 ms 7404 KB Output is correct
65 Correct 167 ms 7532 KB Output is correct
66 Correct 154 ms 7532 KB Output is correct
67 Incorrect 133 ms 7404 KB Output isn't correct
68 Correct 47 ms 7148 KB Output is correct
69 Correct 44 ms 7532 KB Output is correct
70 Correct 39 ms 7404 KB Output is correct
71 Correct 47 ms 7404 KB Output is correct
72 Incorrect 32 ms 5312 KB Output isn't correct
73 Incorrect 88 ms 7660 KB Output isn't correct
74 Correct 60 ms 7660 KB Output is correct
75 Correct 83 ms 7788 KB Output is correct
76 Correct 81 ms 7660 KB Output is correct
77 Correct 81 ms 7660 KB Output is correct
78 Incorrect 88 ms 6252 KB Output isn't correct
79 Correct 69 ms 6252 KB Output is correct
80 Correct 81 ms 6124 KB Output is correct
81 Correct 90 ms 6252 KB Output is correct
82 Correct 75 ms 6124 KB Output is correct
83 Correct 94 ms 6252 KB Output is correct
84 Correct 90 ms 6252 KB Output is correct
85 Correct 98 ms 6252 KB Output is correct
86 Correct 101 ms 6252 KB Output is correct
87 Correct 88 ms 6252 KB Output is correct
88 Correct 98 ms 6380 KB Output is correct
89 Correct 111 ms 6508 KB Output is correct
90 Correct 118 ms 6380 KB Output is correct
91 Correct 111 ms 6380 KB Output is correct
92 Correct 112 ms 6380 KB Output is correct