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Submission #51519

# Submission time Handle Problem Language Result Execution time Memory
51519 2018-06-18T05:22:38 Z spencercompton Bulldozer (JOI17_bulldozer) C++17
20 / 100
 2000 ms 504 KB 
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
long double ptLineDist(long double x1, long double y1, long double x2, long double y2, long double px, long double py){
	long double pd2 = (x1 - x2) * (x1 - x2) + (y1 - y2) * (y1 - y2);
	long double x, y;
	if(pd2 == 0){
		x = x1;
		y = y2;
	}
	else{
		long double u = ((px-x1) * (x2 - x1) + (py - y1) * (y2-y1)) / pd2;
		x = x1 + u * (x2 - x1);
		y = y1 + u * (y2 - y1);
	}
	return (x-px) * (x - px) + (y - py) * (y - py);
}

int main(){
	int n;
	cin >> n;
	ll ans = 0LL;
	ll x[n];
	ll y[n];
	ll v[n];
	for(int i = 0; i<n; i++){
		cin >> x[i] >> y[i] >> v[i];
	}
	long double tol = 0.0000000000000001L;
	for(int i = 0; i<n; i++){
		ans = max(ans,v[i]);
		for(int j = i+1; j<n; j++){
			ll dx = x[j]-x[i];
			ll dy = y[j]-y[i];
			//(dy,-dx);
			vector<pair<long double, ll> > li;
			for(int k = 0; k<n; k++){
				bool cross = (y[k]+dx)*(dy-0LL) > (-dx-0LL)*(x[k]-dy);
				long double dist = ptLineDist(0LL, 0LL, dy, -dx, x[k], y[k]);
				if(cross){
					li.push_back(make_pair(dist,v[k]));
				}
				else{
					li.push_back(make_pair(-dist,v[k]));
				}
			}
			sort(li.begin(),li.end());
			ll bestPre = 0LL;
			ll cur = 0LL;
			for(int k = 0; k<n; k++){
				if(k>0 && li[k].first-li[k-1].first>tol){
					bestPre = min(bestPre,cur);
				}
				cur += li[k].second;
				if(k==n-1 || li[k+1].first-li[k].first>tol){
					ans = max(ans,cur-bestPre);
				}
			}
		}
	}

	for(int i = 0; i<n; i++){
		ans = max(ans,v[i]);
		for(int j = i+1; j<n; j++){
			ans = max(ans,v[i]+v[j]);
			ll dx = x[j]-x[i];
			ll dy = y[j]-y[i];
			swap(dx,dy);
			dx = -dx;
			//(dy,-dx);
			vector<pair<long double, ll> > li;
			for(int k = 0; k<n; k++){
				bool cross = (y[k]+dx)*(dy-0LL) > (-dx-0LL)*(x[k]-dy);
				long double dist = ptLineDist(0LL, 0LL, dy, -dx, x[k], y[k]);
				if(cross){
					li.push_back(make_pair(dist,v[k]));
				}
				else{
					li.push_back(make_pair(-dist,v[k]));
				}
			}
			sort(li.begin(),li.end());
			ll bestPre = 0LL;
			ll cur = 0LL;
			for(int k = 0; k<n; k++){
				if(k>0 && li[k].first-li[k-1].first>tol){
					bestPre = min(bestPre,cur);
				}
				cur += li[k].second;
				if(k==n-1 || li[k+1].first-li[k].first>tol){
					ans = max(ans,cur-bestPre);
				}
			}
		}
	}
	cout << ans << endl;
}

Subtask #1
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 78 ms 376 KB Output is correct
2 Correct 81 ms 384 KB Output is correct
3 Correct 79 ms 256 KB Output is correct
4 Correct 75 ms 384 KB Output is correct
5 Correct 76 ms 256 KB Output is correct
6 Correct 76 ms 384 KB Output is correct
7 Correct 76 ms 360 KB Output is correct
8 Correct 76 ms 256 KB Output is correct
9 Correct 74 ms 256 KB Output is correct
10 Correct 76 ms 384 KB Output is correct
11 Correct 2 ms 256 KB Output is correct
12 Correct 2 ms 256 KB Output is correct
13 Correct 2 ms 384 KB Output is correct
14 Correct 2 ms 256 KB Output is correct
15 Incorrect 2 ms 256 KB Output isn't correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 92 ms 256 KB Output is correct
2 Correct 91 ms 256 KB Output is correct
3 Correct 92 ms 364 KB Output is correct
4 Correct 93 ms 256 KB Output is correct
5 Correct 93 ms 256 KB Output is correct
6 Correct 92 ms 384 KB Output is correct
7 Correct 95 ms 376 KB Output is correct
8 Correct 95 ms 256 KB Output is correct
9 Correct 93 ms 400 KB Output is correct
10 Correct 93 ms 376 KB Output is correct
11 Correct 2 ms 384 KB Output is correct
12 Correct 2 ms 256 KB Output is correct
13 Correct 2 ms 256 KB Output is correct
14 Correct 2 ms 384 KB Output is correct
15 Correct 2 ms 384 KB Output is correct
16 Correct 2 ms 256 KB Output is correct
17 Correct 2 ms 256 KB Output is correct
18 Correct 2 ms 256 KB Output is correct
19 Correct 2 ms 256 KB Output is correct
20 Correct 2 ms 256 KB Output is correct
21 Correct 81 ms 364 KB Output is correct
22 Correct 80 ms 256 KB Output is correct
23 Correct 80 ms 396 KB Output is correct
24 Correct 80 ms 364 KB Output is correct
25 Correct 80 ms 504 KB Output is correct
26 Correct 80 ms 256 KB Output is correct
27 Correct 82 ms 376 KB Output is correct
28 Correct 82 ms 256 KB Output is correct
29 Correct 80 ms 256 KB Output is correct
30 Correct 82 ms 376 KB Output is correct
31 Correct 83 ms 256 KB Output is correct
32 Correct 83 ms 256 KB Output is correct

Subtask #3
0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 92 ms 256 KB Output is correct
2 Correct 91 ms 256 KB Output is correct
3 Correct 92 ms 364 KB Output is correct
4 Correct 93 ms 256 KB Output is correct
5 Correct 93 ms 256 KB Output is correct
6 Correct 92 ms 384 KB Output is correct
7 Correct 95 ms 376 KB Output is correct
8 Correct 95 ms 256 KB Output is correct
9 Correct 93 ms 400 KB Output is correct
10 Correct 93 ms 376 KB Output is correct
11 Correct 2 ms 384 KB Output is correct
12 Correct 2 ms 256 KB Output is correct
13 Correct 2 ms 256 KB Output is correct
14 Correct 2 ms 384 KB Output is correct
15 Correct 2 ms 384 KB Output is correct
16 Correct 2 ms 256 KB Output is correct
17 Correct 2 ms 256 KB Output is correct
18 Correct 2 ms 256 KB Output is correct
19 Correct 2 ms 256 KB Output is correct
20 Correct 2 ms 256 KB Output is correct
21 Correct 81 ms 364 KB Output is correct
22 Correct 80 ms 256 KB Output is correct
23 Correct 80 ms 396 KB Output is correct
24 Correct 80 ms 364 KB Output is correct
25 Correct 80 ms 504 KB Output is correct
26 Correct 80 ms 256 KB Output is correct
27 Correct 82 ms 376 KB Output is correct
28 Correct 82 ms 256 KB Output is correct
29 Correct 80 ms 256 KB Output is correct
30 Correct 82 ms 376 KB Output is correct
31 Correct 83 ms 256 KB Output is correct
32 Correct 83 ms 256 KB Output is correct
33 Execution timed out 2045 ms 484 KB Time limit exceeded
34 Halted 0 ms 0 KB -

Subtask #4
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 92 ms 256 KB Output is correct
2 Correct 91 ms 256 KB Output is correct
3 Correct 92 ms 364 KB Output is correct
4 Correct 93 ms 256 KB Output is correct
5 Correct 93 ms 256 KB Output is correct
6 Correct 92 ms 384 KB Output is correct
7 Correct 95 ms 376 KB Output is correct
8 Correct 95 ms 256 KB Output is correct
9 Correct 93 ms 400 KB Output is correct
10 Correct 93 ms 376 KB Output is correct
11 Correct 2 ms 384 KB Output is correct
12 Correct 2 ms 256 KB Output is correct
13 Correct 2 ms 256 KB Output is correct
14 Correct 2 ms 384 KB Output is correct
15 Correct 2 ms 384 KB Output is correct
16 Correct 2 ms 256 KB Output is correct
17 Correct 2 ms 256 KB Output is correct
18 Correct 2 ms 256 KB Output is correct
19 Correct 2 ms 256 KB Output is correct
20 Correct 2 ms 256 KB Output is correct
21 Correct 81 ms 364 KB Output is correct
22 Correct 80 ms 256 KB Output is correct
23 Correct 80 ms 396 KB Output is correct
24 Correct 80 ms 364 KB Output is correct
25 Correct 80 ms 504 KB Output is correct
26 Correct 80 ms 256 KB Output is correct
27 Correct 82 ms 376 KB Output is correct
28 Correct 82 ms 256 KB Output is correct
29 Correct 80 ms 256 KB Output is correct
30 Correct 82 ms 376 KB Output is correct
31 Correct 83 ms 256 KB Output is correct
32 Correct 83 ms 256 KB Output is correct
33 Execution timed out 2045 ms 484 KB Time limit exceeded
34 Halted 0 ms 0 KB -

Subtask #5
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 78 ms 376 KB Output is correct
2 Correct 81 ms 384 KB Output is correct
3 Correct 79 ms 256 KB Output is correct
4 Correct 75 ms 384 KB Output is correct
5 Correct 76 ms 256 KB Output is correct
6 Correct 76 ms 384 KB Output is correct
7 Correct 76 ms 360 KB Output is correct
8 Correct 76 ms 256 KB Output is correct
9 Correct 74 ms 256 KB Output is correct
10 Correct 76 ms 384 KB Output is correct
11 Correct 2 ms 256 KB Output is correct
12 Correct 2 ms 256 KB Output is correct
13 Correct 2 ms 384 KB Output is correct
14 Correct 2 ms 256 KB Output is correct
15 Incorrect 2 ms 256 KB Output isn't correct