oj.uz

Submission #923676

# Submission time Handle Problem Language Result Execution time Memory
923676 2024-02-07T14:55:19 Z josanneo22 Mecho (IOI09_mecho) C++17
100 / 100
 220 ms 3932 KB 
#pragma warning(suppress : 4996)
#include <bits/stdc++.h>
using namespace std;
using i64 = long long;
 
#pragma GCC optimize("Ofast")
#pragma GCC optimization ("unroll-loops")
#pragma GCC target("avx,avx2,fma")
#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,tune=native")
#pragma GCC optimize(3)
#pragma GCC optimize("inline")
#pragma GCC optimize("-fgcse")
#pragma GCC optimize("-fgcse-lm")
#pragma GCC optimize("-fipa-sra")
#pragma GCC optimize("-ftree-pre")
#pragma GCC optimize("-ftree-vrp")
#pragma GCC optimize("-fpeephole2")
#pragma GCC optimize("-ffast-math")
#pragma GCC optimize("-fsched-spec")
#pragma GCC optimize("unroll-loops")
#pragma GCC optimize("-falign-jumps")
#pragma GCC optimize("-falign-loops")
#pragma GCC optimize("-falign-labels")
#pragma GCC optimize("-fdevirtualize")
#pragma GCC optimize("-fcaller-saves")
#pragma GCC optimize("-fcrossjumping")
#pragma GCC optimize("-fthread-jumps")
#pragma GCC optimize("-funroll-loops")
#pragma GCC optimize("-fwhole-program")
#pragma GCC optimize("-freorder-blocks")
#pragma GCC optimize("-fschedule-insns")
#pragma GCC optimize("inline-functions")
#pragma GCC optimize("-ftree-tail-merge")
#pragma GCC optimize("-fschedule-insns2")
#pragma GCC optimize("-fstrict-aliasing")
#pragma GCC optimize("-fstrict-overflow")
#pragma GCC optimize("-falign-functions")
#pragma GCC optimize("-fcse-skip-blocks")
#pragma GCC optimize("-fcse-follow-jumps")
#pragma GCC optimize("-fsched-interblock")
#pragma GCC optimize("-fpartial-inlining")
#pragma GCC optimize("no-stack-protector")
#pragma GCC optimize("-freorder-functions")
#pragma GCC optimize("-findirect-inlining")
#pragma GCC optimize("-fhoist-adjacent-loads")
#pragma GCC optimize("-frerun-cse-after-loop")
#pragma GCC optimize("inline-small-functions")
#pragma GCC optimize("-finline-small-functions")
#pragma GCC optimize("-ftree-switch-conversion")
#pragma GCC optimize("-foptimize-sibling-calls")
#pragma GCC optimize("-fexpensive-optimizations")
#pragma GCC optimize("-funsafe-loop-optimizations")
#pragma GCC optimize("inline-functions-called-once")
#pragma GCC optimize("-fdelete-null-pointer-checks")
// char buf[1 << 23], * p1 = buf, * p2 = buf;
// #define getchar() (p1==p2&&(p2=(p1=buf)+fread(buf,1,1<<21,stdin),p1==p2)?EOF:*p1++)
template<typename T> inline void read(T& x) { x = 0; T f = 1; char ch = getchar();  while (!isdigit(ch)) { if (ch == '-') f = -1; ch = getchar(); } while (isdigit(ch)) { x = x * (1 << 1) + x * (1 << 3) + (ch - 48); ch = getchar(); } x *= f; }
template<typename x, typename... y>void read(x& a, y&... b) { read(a); read(b...); }
template<typename T> inline void print(T x) { if (x < 0) { putchar('-'); x = -x; } if (x > 9)  print(x / 10); putchar(x % 10 + '0'); }
template<typename x, typename... y>void print(x& a, y&... b) { print(a); putchar(' '); print(b...); }
#define spa putchar(' ')
#define nl putchar('\n')
#define printv(a) for(int p = 0; p < a.size(); p++) print(a[p]), (p == a.size() - 1? nl : sp);
#define L(i,j,k) for(int i=(j);i<=(k);++i)
#define R(i,j,k) for(int i=(j);i>=(k);--i)
#define all(x) x.begin(),x.end()
#define me(x,a) memset(x,a,sizeof(x))
 
 
int main() {
	ios::sync_with_stdio(false);
	cin.tie(nullptr); cout.tie(nullptr);
 
	int N, S; cin >> N >> S;
	vector<vector<char>> G(N + 1, vector<char>(N + 1));
	vector<vector<int>> dis(N + 1, vector<int>(N + 1, -1));
	int init_x, init_y, end_x, end_y;
	queue<pair<int, int>> q;
	L(i, 1, N) L(j, 1, N) {
		cin >> G[i][j];
		if (G[i][j] == 'M') {
			init_x = i, init_y = j;
			G[i][j] == 'G';
		}
		if (G[i][j] == 'D') {
			end_x = i, end_y = j;
		}
		if (G[i][j] == 'H') {
			dis[i][j] = 0;
			q.push(make_pair(i, j));
		}
	}
	auto can_go = [&](int x, int y) { return x >= 1 && x <= N && y >= 1 && y <= N && G[x][y] != 'T'; };
	int dx[4] = { 0,0,1,-1 };
	int dy[4] = { 1, -1, 0,0 };
 
	while (q.size()) {
		int x = q.front().first, y = q.front().second; q.pop();
		for (int dir = 0; dir < 4; dir++) {
			int xx = x + dx[dir], yy = y + dy[dir];
			if (can_go(xx, yy) && G[xx][yy] != 'D' && dis[xx][yy] == -1) {
				dis[xx][yy] = dis[x][y] + S;
				q.push(make_pair(xx, yy));
			}
		}
	}
	dis[end_x][end_y] = N * N * S + 1000;
	function<bool(int)> check = [&](int T) {
		if (T * S >= dis[init_x][init_y]) return false;
		queue<pair<int, pair<int, int>>> Q;
		vector<vector<bool>> vis(N + 1, vector<bool>(N + 1));
		Q.push(make_pair(T * S, make_pair(init_x, init_y)));
		vis[init_x][init_y] = true;
		while (Q.size()) {
			int d = Q.front().first;
			int x = Q.front().second.first, y = Q.front().second.second;
			Q.pop();
			if (x == end_x && y == end_y) return true;
			for (int dir = 0; dir < 4; dir++) {
				int xx = x + dx[dir], yy = y + dy[dir];
				if (can_go(xx, yy) && !vis[xx][yy] && (d + 1 < dis[xx][yy])) {
					Q.push(make_pair(d + 1, make_pair(xx, yy)));
					vis[xx][yy] = true;
				}
			}
		}
		return false;
	};
	int lo = 0, hi = 2 * N * N + 5000, ans = -1;
	while (lo <= hi) {
		int mid = (lo + hi) >> 1;
		if (check(mid)) {
			ans = mid;
			lo = mid + 1;
		}
		else hi = mid - 1;
	}
	cout << ans << '\n';
}

Compilation message

mecho.cpp:1: warning: ignoring '#pragma warning ' [-Wunknown-pragmas]
    1 | #pragma warning(suppress : 4996)
      | 
mecho.cpp:7: warning: ignoring '#pragma GCC optimization' [-Wunknown-pragmas]
    7 | #pragma GCC optimization ("unroll-loops")
      | 
mecho.cpp:29:39: warning: bad option '-fwhole-program' to pragma 'optimize' [-Wpragmas]
   29 | #pragma GCC optimize("-fwhole-program")
      |                                       ^
mecho.cpp:36:41: warning: bad option '-fstrict-overflow' to pragma 'optimize' [-Wpragmas]
   36 | #pragma GCC optimize("-fstrict-overflow")
      |                                         ^
mecho.cpp:38:41: warning: bad option '-fcse-skip-blocks' to pragma 'optimize' [-Wpragmas]
   38 | #pragma GCC optimize("-fcse-skip-blocks")
      |                                         ^
mecho.cpp:52:51: warning: bad option '-funsafe-loop-optimizations' to pragma 'optimize' [-Wpragmas]
   52 | #pragma GCC optimize("-funsafe-loop-optimizations")
      |                                                   ^
mecho.cpp:57:43: warning: bad option '-fwhole-program' to attribute 'optimize' [-Wattributes]
   57 | template<typename T> inline void read(T& x) { x = 0; T f = 1; char ch = getchar();  while (!isdigit(ch)) { if (ch == '-') f = -1; ch = getchar(); } while (isdigit(ch)) { x = x * (1 << 1) + x * (1 << 3) + (ch - 48); ch = getchar(); } x *= f; }
      |                                           ^
mecho.cpp:57:43: warning: bad option '-fstrict-overflow' to attribute 'optimize' [-Wattributes]
mecho.cpp:57:43: warning: bad option '-fcse-skip-blocks' to attribute 'optimize' [-Wattributes]
mecho.cpp:57:43: warning: bad option '-funsafe-loop-optimizations' to attribute 'optimize' [-Wattributes]
mecho.cpp:58:59: warning: bad option '-fwhole-program' to attribute 'optimize' [-Wattributes]
   58 | template<typename x, typename... y>void read(x& a, y&... b) { read(a); read(b...); }
      |                                                           ^
mecho.cpp:58:59: warning: bad option '-fstrict-overflow' to attribute 'optimize' [-Wattributes]
mecho.cpp:58:59: warning: bad option '-fcse-skip-blocks' to attribute 'optimize' [-Wattributes]
mecho.cpp:58:59: warning: bad option '-funsafe-loop-optimizations' to attribute 'optimize' [-Wattributes]
mecho.cpp:59:43: warning: bad option '-fwhole-program' to attribute 'optimize' [-Wattributes]
   59 | template<typename T> inline void print(T x) { if (x < 0) { putchar('-'); x = -x; } if (x > 9)  print(x / 10); putchar(x % 10 + '0'); }
      |                                           ^
mecho.cpp:59:43: warning: bad option '-fstrict-overflow' to attribute 'optimize' [-Wattributes]
mecho.cpp:59:43: warning: bad option '-fcse-skip-blocks' to attribute 'optimize' [-Wattributes]
mecho.cpp:59:43: warning: bad option '-funsafe-loop-optimizations' to attribute 'optimize' [-Wattributes]
mecho.cpp:60:60: warning: bad option '-fwhole-program' to attribute 'optimize' [-Wattributes]
   60 | template<typename x, typename... y>void print(x& a, y&... b) { print(a); putchar(' '); print(b...); }
      |                                                            ^
mecho.cpp:60:60: warning: bad option '-fstrict-overflow' to attribute 'optimize' [-Wattributes]
mecho.cpp:60:60: warning: bad option '-fcse-skip-blocks' to attribute 'optimize' [-Wattributes]
mecho.cpp:60:60: warning: bad option '-funsafe-loop-optimizations' to attribute 'optimize' [-Wattributes]
mecho.cpp:70:10: warning: bad option '-fwhole-program' to attribute 'optimize' [-Wattributes]
   70 | int main() {
      |          ^
mecho.cpp:70:10: warning: bad option '-fstrict-overflow' to attribute 'optimize' [-Wattributes]
mecho.cpp:70:10: warning: bad option '-fcse-skip-blocks' to attribute 'optimize' [-Wattributes]
mecho.cpp:70:10: warning: bad option '-funsafe-loop-optimizations' to attribute 'optimize' [-Wattributes]
mecho.cpp: In function 'int main()':
mecho.cpp:83:12: warning: value computed is not used [-Wunused-value]
   83 |    G[i][j] == 'G';
mecho.cpp:93:32: warning: bad option '-fwhole-program' to attribute 'optimize' [-Wattributes]
   93 |  auto can_go = [&](int x, int y) { return x >= 1 && x <= N && y >= 1 && y <= N && G[x][y] != 'T'; };
      |                                ^
mecho.cpp:93:32: warning: bad option '-fstrict-overflow' to attribute 'optimize' [-Wattributes]
mecho.cpp:93:32: warning: bad option '-fcse-skip-blocks' to attribute 'optimize' [-Wattributes]
mecho.cpp:93:32: warning: bad option '-funsafe-loop-optimizations' to attribute 'optimize' [-Wattributes]
mecho.cpp:108:39: warning: bad option '-fwhole-program' to attribute 'optimize' [-Wattributes]
  108 |  function<bool(int)> check = [&](int T) {
      |                                       ^
mecho.cpp:108:39: warning: bad option '-fstrict-overflow' to attribute 'optimize' [-Wattributes]
mecho.cpp:108:39: warning: bad option '-fcse-skip-blocks' to attribute 'optimize' [-Wattributes]
mecho.cpp:108:39: warning: bad option '-funsafe-loop-optimizations' to attribute 'optimize' [-Wattributes]

Subtask #1
100.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 448 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 150 ms 3772 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 1 ms 344 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 0 ms 348 KB Output is correct
22 Correct 0 ms 348 KB Output is correct
23 Correct 1 ms 348 KB Output is correct
24 Correct 1 ms 348 KB Output is correct
25 Correct 1 ms 348 KB Output is correct
26 Correct 0 ms 348 KB Output is correct
27 Correct 0 ms 348 KB Output is correct
28 Correct 0 ms 348 KB Output is correct
29 Correct 0 ms 348 KB Output is correct
30 Correct 0 ms 348 KB Output is correct
31 Correct 0 ms 348 KB Output is correct
32 Correct 1 ms 348 KB Output is correct
33 Correct 4 ms 1112 KB Output is correct
34 Correct 4 ms 1116 KB Output is correct
35 Correct 33 ms 1116 KB Output is correct
36 Correct 4 ms 1116 KB Output is correct
37 Correct 5 ms 1112 KB Output is correct
38 Correct 49 ms 1368 KB Output is correct
39 Correct 5 ms 1372 KB Output is correct
40 Correct 6 ms 1372 KB Output is correct
41 Correct 60 ms 1548 KB Output is correct
42 Correct 7 ms 1628 KB Output is correct
43 Correct 7 ms 1628 KB Output is correct
44 Correct 76 ms 1628 KB Output is correct
45 Correct 8 ms 1884 KB Output is correct
46 Correct 8 ms 1984 KB Output is correct
47 Correct 85 ms 2036 KB Output is correct
48 Correct 11 ms 2140 KB Output is correct
49 Correct 9 ms 2140 KB Output is correct
50 Correct 103 ms 2140 KB Output is correct
51 Correct 11 ms 2652 KB Output is correct
52 Correct 11 ms 2588 KB Output is correct
53 Correct 128 ms 2652 KB Output is correct
54 Correct 12 ms 2908 KB Output is correct
55 Correct 13 ms 2908 KB Output is correct
56 Correct 158 ms 3156 KB Output is correct
57 Correct 14 ms 3164 KB Output is correct
58 Correct 15 ms 3164 KB Output is correct
59 Correct 173 ms 3164 KB Output is correct
60 Correct 16 ms 3676 KB Output is correct
61 Correct 17 ms 3676 KB Output is correct
62 Correct 196 ms 3764 KB Output is correct
63 Correct 127 ms 3664 KB Output is correct
64 Correct 220 ms 3676 KB Output is correct
65 Correct 180 ms 3756 KB Output is correct
66 Correct 151 ms 3668 KB Output is correct
67 Correct 142 ms 3672 KB Output is correct
68 Correct 52 ms 3676 KB Output is correct
69 Correct 51 ms 3672 KB Output is correct
70 Correct 37 ms 3672 KB Output is correct
71 Correct 45 ms 3872 KB Output is correct
72 Correct 29 ms 3676 KB Output is correct
73 Correct 38 ms 3932 KB Output is correct
74 Correct 87 ms 3924 KB Output is correct
75 Correct 111 ms 3932 KB Output is correct
76 Correct 93 ms 3932 KB Output is correct
77 Correct 93 ms 3928 KB Output is correct
78 Correct 121 ms 3676 KB Output is correct
79 Correct 67 ms 3884 KB Output is correct
80 Correct 93 ms 3672 KB Output is correct
81 Correct 105 ms 3676 KB Output is correct
82 Correct 89 ms 3892 KB Output is correct
83 Correct 124 ms 3852 KB Output is correct
84 Correct 112 ms 3920 KB Output is correct
85 Correct 122 ms 3676 KB Output is correct
86 Correct 119 ms 3848 KB Output is correct
87 Correct 123 ms 3848 KB Output is correct
88 Correct 132 ms 3812 KB Output is correct
89 Correct 129 ms 3676 KB Output is correct
90 Correct 135 ms 3676 KB Output is correct
91 Correct 132 ms 3792 KB Output is correct
92 Correct 143 ms 3672 KB Output is correct