oj.uz

Submission #395199

# Submission time Handle Problem Language Result Execution time Memory
395199 2021-04-28T01:48:26 Z ChrisT Bulldozer (JOI17_bulldozer) C++17
20 / 100
 2000 ms 33288 KB 
#include <bits/stdc++.h>
using namespace std;
const int MN = 2e3 + 5;
#define lc ind<<1
#define rc ind<<1|1
struct Node {
	long long mn,mx,lz;
} tree[MN<<2];
void push_down (int ind, int l, int r) {
	if (tree[ind].lz) {
		tree[ind].mn += tree[ind].lz;
		tree[ind].mx += tree[ind].lz;
		if (l != r) {
			tree[lc].lz += tree[ind].lz;
			tree[rc].lz += tree[ind].lz;
		}
		tree[ind].lz = 0;
	}
}
void update (int ind, int tl, int tr, int l, int r, long long v) {
	push_down(ind,tl,tr);
	if (tl > r || tr < l) return;
	if (l <= tl && tr <= r) {
		tree[ind].lz += v;
		push_down(ind,tl,tr);
		return;
	}
	int mid = (tl + tr) / 2;
	update(lc,tl,mid,l,r,v); update(rc,mid+1,tr,l,r,v);
	tree[ind].mn = min(tree[lc].mn,tree[rc].mn);
	tree[ind].mx = max(tree[lc].mx,tree[rc].mx);
}
long long queryMin (int ind, int tl, int tr, int l, int r) {
	push_down(ind,tl,tr);
	if (tl > r || tr < l) return LLONG_MAX;
	if (l <= tl && tr <= r) return tree[ind].mn;
	int mid = (tl + tr) / 2;
	return min(queryMin(lc,tl,mid,l,r),queryMin(rc,mid+1,tr,l,r));
}
long long queryMax (int ind, int tl, int tr, int l, int r) {
	push_down(ind,tl,tr);
	if (tl > r || tr < l) return LLONG_MIN;
	if (l <= tl && tr <= r) return tree[ind].mx;
	int mid = (tl + tr) / 2;
	return max(queryMax(lc,tl,mid,l,r),queryMax(rc,mid+1,tr,l,r));
}
int main () {
	int n,c=0; scanf ("%d",&n);
	vector<array<int,4>> pts(n); vector<int> pos(n), ow(n);
	for (auto &[x,y,w,id] : pts) scanf ("%d %d %d",&x,&y,&w), id=c++, ow[id] = w;
	vector<array<int,4>> events;
	for (int i = 0; i < n; i++) {
		for (int j = i+1; j < n; j++) {
			int dx = pts[i][0] - pts[j][0], dy = pts[i][1] - pts[j][1];
			if (dx < 0) dx = -dx, dy = -dy;
			if (dx == 0 && dy < 0) dy = -dy;
			events.push_back({dx,dy,i,j});
		}
	}
	sort(pts.begin(),pts.end());
	sort(events.begin(),events.end(),[&](const auto &a, const auto &b) {return (long long)a[1] * b[0] > (long long)b[1] * a[0];});
	for (int i = 0; i < (int)events.size(); i++) {
		for (int j = i+1; j < (int)events.size(); j++) {
			assert((long long)events[i][0] * events[j][1] != (long long)events[j][0] * events[i][1]);
		}
	}
	long long ret = 0;
	for (int i = 0; i < n; i++) {
		pos[pts[i][3]] = i+1; ret = max(ret,(long long)pts[i][2]);
		update(1,1,n,i+1,n,pts[i][2]);
	}
	for (auto &[x,y,i,j] : events) {
		//printf ("order: ");
		//for (int i = 1; i <= n; i++) for (int j =0 ;j < n; j++) if (pos[j]==i) printf ("%d ",j);
		//printf ("\n");
		//for (int i = 1; i <= n; i++) printf ("%lld ",queryMax(1,1,n,i,i));
		//printf ("\n");
		if (pos[i] > pos[j]) swap(i,j);
		ret = max(ret,queryMax(1,1,n,pos[j],pos[j]) - min(0LL,queryMin(1,1,n,1,pos[i]-1)) - min(0,ow[i]) - min(0,ow[j]));
		ret = max(ret,queryMax(1,1,n,pos[j],n) - (pos[i] == 1 ? 0LL : queryMax(1,1,n,pos[i]-1,pos[i]-1)) - min(0,ow[i]) - min(0,ow[j]));
		update(1,1,n,pos[i],pos[i],ow[j]-ow[i]);
		swap(pos[i],pos[j]);
	}
	printf ("%lld\n",ret);
	return 0;
}

Compilation message

bulldozer.cpp: In function 'int main()':
bulldozer.cpp:48:19: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   48 |  int n,c=0; scanf ("%d",&n);
      |             ~~~~~~^~~~~~~~~
bulldozer.cpp:50:37: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   50 |  for (auto &[x,y,w,id] : pts) scanf ("%d %d %d",&x,&y,&w), id=c++, ow[id] = w;
      |                               ~~~~~~^~~~~~~~~~~~~~~~~~~~~

Subtask #1
0 / 5.0

# Verdict Execution time Memory Grader output
1 Runtime error 2 ms 844 KB Execution killed with signal 6
2 Halted 0 ms 0 KB -

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 17 ms 520 KB Output is correct
2 Correct 17 ms 524 KB Output is correct
3 Correct 17 ms 524 KB Output is correct
4 Correct 17 ms 460 KB Output is correct
5 Correct 17 ms 524 KB Output is correct
6 Correct 23 ms 460 KB Output is correct
7 Correct 17 ms 524 KB Output is correct
8 Correct 20 ms 524 KB Output is correct
9 Correct 17 ms 520 KB Output is correct
10 Correct 17 ms 528 KB Output is correct
11 Correct 1 ms 204 KB Output is correct
12 Correct 1 ms 204 KB Output is correct
13 Correct 1 ms 204 KB Output is correct
14 Correct 1 ms 204 KB Output is correct
15 Correct 1 ms 204 KB Output is correct
16 Correct 1 ms 204 KB Output is correct
17 Correct 1 ms 204 KB Output is correct
18 Correct 1 ms 204 KB Output is correct
19 Correct 1 ms 204 KB Output is correct
20 Correct 1 ms 204 KB Output is correct
21 Correct 17 ms 520 KB Output is correct
22 Correct 17 ms 460 KB Output is correct
23 Correct 17 ms 528 KB Output is correct
24 Correct 17 ms 524 KB Output is correct
25 Correct 17 ms 528 KB Output is correct
26 Correct 17 ms 524 KB Output is correct
27 Correct 17 ms 524 KB Output is correct
28 Correct 17 ms 520 KB Output is correct
29 Correct 17 ms 528 KB Output is correct
30 Correct 17 ms 460 KB Output is correct
31 Correct 17 ms 524 KB Output is correct
32 Correct 17 ms 524 KB Output is correct

Subtask #3
0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 17 ms 520 KB Output is correct
2 Correct 17 ms 524 KB Output is correct
3 Correct 17 ms 524 KB Output is correct
4 Correct 17 ms 460 KB Output is correct
5 Correct 17 ms 524 KB Output is correct
6 Correct 23 ms 460 KB Output is correct
7 Correct 17 ms 524 KB Output is correct
8 Correct 20 ms 524 KB Output is correct
9 Correct 17 ms 520 KB Output is correct
10 Correct 17 ms 528 KB Output is correct
11 Correct 1 ms 204 KB Output is correct
12 Correct 1 ms 204 KB Output is correct
13 Correct 1 ms 204 KB Output is correct
14 Correct 1 ms 204 KB Output is correct
15 Correct 1 ms 204 KB Output is correct
16 Correct 1 ms 204 KB Output is correct
17 Correct 1 ms 204 KB Output is correct
18 Correct 1 ms 204 KB Output is correct
19 Correct 1 ms 204 KB Output is correct
20 Correct 1 ms 204 KB Output is correct
21 Correct 17 ms 520 KB Output is correct
22 Correct 17 ms 460 KB Output is correct
23 Correct 17 ms 528 KB Output is correct
24 Correct 17 ms 524 KB Output is correct
25 Correct 17 ms 528 KB Output is correct
26 Correct 17 ms 524 KB Output is correct
27 Correct 17 ms 524 KB Output is correct
28 Correct 17 ms 520 KB Output is correct
29 Correct 17 ms 528 KB Output is correct
30 Correct 17 ms 460 KB Output is correct
31 Correct 17 ms 524 KB Output is correct
32 Correct 17 ms 524 KB Output is correct
33 Execution timed out 2088 ms 33288 KB Time limit exceeded
34 Halted 0 ms 0 KB -

Subtask #4
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 17 ms 520 KB Output is correct
2 Correct 17 ms 524 KB Output is correct
3 Correct 17 ms 524 KB Output is correct
4 Correct 17 ms 460 KB Output is correct
5 Correct 17 ms 524 KB Output is correct
6 Correct 23 ms 460 KB Output is correct
7 Correct 17 ms 524 KB Output is correct
8 Correct 20 ms 524 KB Output is correct
9 Correct 17 ms 520 KB Output is correct
10 Correct 17 ms 528 KB Output is correct
11 Correct 1 ms 204 KB Output is correct
12 Correct 1 ms 204 KB Output is correct
13 Correct 1 ms 204 KB Output is correct
14 Correct 1 ms 204 KB Output is correct
15 Correct 1 ms 204 KB Output is correct
16 Correct 1 ms 204 KB Output is correct
17 Correct 1 ms 204 KB Output is correct
18 Correct 1 ms 204 KB Output is correct
19 Correct 1 ms 204 KB Output is correct
20 Correct 1 ms 204 KB Output is correct
21 Correct 17 ms 520 KB Output is correct
22 Correct 17 ms 460 KB Output is correct
23 Correct 17 ms 528 KB Output is correct
24 Correct 17 ms 524 KB Output is correct
25 Correct 17 ms 528 KB Output is correct
26 Correct 17 ms 524 KB Output is correct
27 Correct 17 ms 524 KB Output is correct
28 Correct 17 ms 520 KB Output is correct
29 Correct 17 ms 528 KB Output is correct
30 Correct 17 ms 460 KB Output is correct
31 Correct 17 ms 524 KB Output is correct
32 Correct 17 ms 524 KB Output is correct
33 Execution timed out 2088 ms 33288 KB Time limit exceeded
34 Halted 0 ms 0 KB -

Subtask #5
0 / 20.0

# Verdict Execution time Memory Grader output
1 Runtime error 2 ms 844 KB Execution killed with signal 6
2 Halted 0 ms 0 KB -