oj.uz

답안 #826824

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
826824 2023-08-16T05:06:12 Z 반딧불(#10373) Golf (JOI17_golf) C++17
0 / 100
 46 ms 34660 KB 
#include <bits/stdc++.h>

using namespace std;

typedef long long ll;

struct Rect{
	int xl, yl, xr, yr;
	Rect(){}
	Rect(int xl, int yl, int xr, int yr): xl(xl), yl(yl), xr(xr), yr(yr){}
};

int xs, ys, xe, ye;
int n;
Rect rects[100002];

void renumber();
void solve();

int main(){
	scanf("%d %d %d %d %d", &xs, &ys, &xe, &ye, &n);
	for(int i=1; i<=n; i++){
		scanf("%d %d %d %d", &rects[i].xl, &rects[i].xr, &rects[i].yl, &rects[i].yr);
	}

	renumber();
	solve();
}

int H, W;

void renumber(){
	vector<int> vx, vy;
	vx.push_back(xs), vx.push_back(xe), vy.push_back(ys), vy.push_back(ye);
	for(int i=1; i<=n; i++){
		vx.push_back(rects[i].xl), vx.push_back(rects[i].xr);
		vy.push_back(rects[i].yl), vy.push_back(rects[i].yr);
	}
	sort(vx.begin(), vx.end());
	vx.erase(unique(vx.begin(), vx.end()), vx.end());
	sort(vy.begin(), vy.end());
	vy.erase(unique(vy.begin(), vy.end()), vy.end());
	H = (int)vx.size();
	W = (int)vy.size();
	xs = lower_bound(vx.begin(), vx.end(), xs) - vx.begin() + 1;
	xe = lower_bound(vx.begin(), vx.end(), xe) - vx.begin() + 1;
	ys = lower_bound(vy.begin(), vy.end(), ys) - vy.begin() + 1;
	ye = lower_bound(vy.begin(), vy.end(), ye) - vy.begin() + 1;
	for(int i=1; i<=n; i++){
		rects[i].xl = lower_bound(vx.begin(), vx.end(), rects[i].xl) - vx.begin() + 1;
		rects[i].xr = lower_bound(vx.begin(), vx.end(), rects[i].xr) - vx.begin() + 1;
		rects[i].yl = lower_bound(vy.begin(), vy.end(), rects[i].yl) - vy.begin() + 1;
		rects[i].yr = lower_bound(vy.begin(), vy.end(), rects[i].yr) - vy.begin() + 1;
	}
}

struct dat{
	int x, y, dir, dist;
	dat(){}
	dat(int x, int y, int dir, int dist): x(x), y(y), dir(dir), dist(dist){}
};

const int xx[]={0, 1, 0, -1}, yy[]={1, 0, -1, 0};
deque<dat> dq;
bool visited[2102][2102][4];
int dist[2102][2102][4];
bool passable[2102][2102][4];

void solve(){
	for(int i=1; i<=H; i++) for(int j=1; j<=W; j++) for(int d=0; d<4; d++) passable[i][j][d] = 1;
	for(int i=1; i<=n; i++){
		int xl = rects[i].xl, xr = rects[i].xr, yl = rects[i].yl, yr = rects[i].yr;
		for(int x=xl+1; x<xr; x++) for(int y=yl; y<yr; y++) passable[x][y][0] = false;
		for(int x=xl; x<xr; x++) for(int y=yl+1; y<yr; y++) passable[x][y][1] = false;
		for(int x=xl+1; x<xr; x++) for(int y=yl+1; y<=yr; y++) passable[x][y][2] = false;
		for(int x=xl+1; x<=xr; x++) for(int y=yl+1; y<yr; y++) passable[x][y][3] = false;
	}

	for(int i=0; i<4; i++) dq.push_back(dat(xs, ys, i, 1));
	while(!dq.empty()){
		dat tmp = dq.front(); dq.pop_front();
		if(visited[tmp.x][tmp.y][tmp.dir]) continue;
		visited[tmp.x][tmp.y][tmp.dir] = 1;
		dist[tmp.x][tmp.y][tmp.dir] = tmp.dist;
		//printf("%d %d %d: %d\n", tmp.x, tmp.y, tmp.dir, tmp.dist);
		if(tmp.x == xe && tmp.y == ye){
			printf("%d", tmp.dist);
			exit(0);
		}
		for(int d=0; d<4; d++){
			int tx = tmp.x + xx[d], ty = tmp.y + yy[d];
			if(tx<1 || tx>H || ty<1 || ty>W || !passable[tx][ty][d]) continue;
			if(d == tmp.dir) dq.push_front(dat(tx, ty, d, tmp.dist));
			else dq.push_back(dat(tx, ty, d, tmp.dist+1));
		}
	}
	exit(1);
}

Compilation message

golf.cpp: In function 'int main()':
golf.cpp:21:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   21 |  scanf("%d %d %d %d %d", &xs, &ys, &xe, &ye, &n);
      |  ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
golf.cpp:23:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   23 |   scanf("%d %d %d %d", &rects[i].xl, &rects[i].xr, &rects[i].yl, &rects[i].yr);
      |   ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 0 ms 468 KB Output is correct
3 Correct 1 ms 596 KB Output is correct
4 Correct 3 ms 2900 KB Output is correct
5 Correct 43 ms 34660 KB Output is correct
6 Correct 30 ms 29416 KB Output is correct
7 Correct 45 ms 30776 KB Output is correct
8 Correct 43 ms 33104 KB Output is correct
9 Correct 46 ms 30524 KB Output is correct
10 Correct 23 ms 22900 KB Output is correct
11 Correct 25 ms 31212 KB Output is correct
12 Correct 23 ms 20052 KB Output is correct
13 Correct 43 ms 33080 KB Output is correct
14 Correct 37 ms 30368 KB Output is correct
15 Incorrect 21 ms 9812 KB Output isn't correct
16 Halted 0 ms 0 KB -

Subtask #2
0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 0 ms 468 KB Output is correct
3 Correct 1 ms 596 KB Output is correct
4 Correct 3 ms 2900 KB Output is correct
5 Correct 43 ms 34660 KB Output is correct
6 Correct 30 ms 29416 KB Output is correct
7 Correct 45 ms 30776 KB Output is correct
8 Correct 43 ms 33104 KB Output is correct
9 Correct 46 ms 30524 KB Output is correct
10 Correct 23 ms 22900 KB Output is correct
11 Correct 25 ms 31212 KB Output is correct
12 Correct 23 ms 20052 KB Output is correct
13 Correct 43 ms 33080 KB Output is correct
14 Correct 37 ms 30368 KB Output is correct
15 Incorrect 21 ms 9812 KB Output isn't correct
16 Halted 0 ms 0 KB -

Subtask #3
0 / 70.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 0 ms 468 KB Output is correct
3 Correct 1 ms 596 KB Output is correct
4 Correct 3 ms 2900 KB Output is correct
5 Correct 43 ms 34660 KB Output is correct
6 Correct 30 ms 29416 KB Output is correct
7 Correct 45 ms 30776 KB Output is correct
8 Correct 43 ms 33104 KB Output is correct
9 Correct 46 ms 30524 KB Output is correct
10 Correct 23 ms 22900 KB Output is correct
11 Correct 25 ms 31212 KB Output is correct
12 Correct 23 ms 20052 KB Output is correct
13 Correct 43 ms 33080 KB Output is correct
14 Correct 37 ms 30368 KB Output is correct
15 Incorrect 21 ms 9812 KB Output isn't correct
16 Halted 0 ms 0 KB -