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답안 #942555

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
942555 2024-03-10T21:01:31 Z qin Bulldozer (JOI17_bulldozer) C++17
80 / 100
 656 ms 126112 KB 
//~ #pragma GCC optimize("O3")
#include <bits/stdc++.h>
#define fi first
#define se second
#define pn printf("\n")
#define ssize(x) int(x.size())
#define all(x) x.begin(),x.end()
#define rall(x) x.rbegin(),x.rend()
#define bitcount(x) __builtin_popcount(x)
#define clz(x) __builtin_clz(x)
#define ctz(x) __builtin_ctz(x)
using namespace std;
typedef long long ll;
typedef pair<int, int> pii;
typedef pair<int, ll> pil;
typedef pair<ll, int> pli;
typedef pair<ll, ll> pll;
typedef long double db;
#define int ll
#define vv vector
/*void read(int &a){
		char c = getchar_unlocked(); a = 0;
		while(c<'0' || '9'<c) c = getchar_unlocked();
		while('0'<=c&&c<='9') a = (a<<3)+(a<<1)+c-'0', c = getchar_unlocked();
}*/
int inf = 2e09; ll infll = 2e18; int mod = (1<<23)*119+1;
struct pt{
		int x, y, val;
		pt(){ x = 0, y = 0, val = 0; }
		pt(int X, int Y, int V){ x = X, y = Y, val = V; }
		bool operator <(const pt &a) const{ return x != a.x ? x < a.x : y < a.y; }
};
db eps = 1e-15;
bool equal(db a, db b){ return abs(b-a) < eps; }
struct line{
		db a, b;
		int x1, x2, i, j;
		line(){ a = 0, b = 0, x1 = 0, x2 = 0, i = 0, j = 0; }
		line(int X1, int Y1, int X2, int Y2, int I, int J){
				if(X1 == X2) a = 1e10, b = 0, x1 = min(Y1, Y2), x2 = max(Y1, Y2);
				else a = (Y2-Y1)/db(X2-X1), b = db(Y1)-a*X1, x1 = min(X1, X2), x2 = max(X1, X2);
				i = I, j = J;
		}
		bool operator <(const line &t) const{
				if(!equal(a, t.a)) return a < t.a;
				else if(!equal(b, t.b)) return b < t.b;
				else if(!equal(x1, t.x1)) return x1 < t.x1;
				return x2 < t.x2;
		}
};
int base = 1;
struct seg{
		struct Node{
				ll mx, mn, mx_delta;
				Node(){ mx = -infll, mn = infll, mx_delta = -infll; }
				Node(ll val){ mx = val, mn = val, mx_delta = 0; }
		};
		vv<Node> t;
		void init(int n, vv<ll> &pf){
				while(base < n) base <<= 1;
				t.resize(base<<1);
				for(int i = 1; i <= n; ++i) t[i+base-1] = Node(pf[i]);
				for(int i = base-1; i; --i){
						t[i].mx = max(t[i<<1].mx, t[i<<1|1].mx);
						t[i].mn = min(t[i<<1].mn, t[i<<1|1].mn);
						t[i].mx_delta = max(t[i<<1|1].mx-t[i<<1].mn, max(t[i<<1].mx_delta, t[i<<1|1].mx_delta));
				}
		}
		void update(int i, ll val){ //tutaj ewentualnie mozna dozylowywac
				for(i += base-1, t[i] = Node(val), i >>= 1; i; i >>= 1){
						t[i].mx = max(t[i<<1].mx, t[i<<1|1].mx);
						t[i].mn = min(t[i<<1].mn, t[i<<1|1].mn);
						t[i].mx_delta = max(t[i<<1|1].mx-t[i<<1].mn, max(t[i<<1].mx_delta, t[i<<1|1].mx_delta));
				}
		}
		ll query(){ return max(t[1].mx, t[1].mx_delta); }
};
void answer(){
		int n; scanf("%lld", &n);
		vv<pt> p(n+1);
		for(int i = 1; i <= n; ++i) scanf("%lld%lld%lld", &p[i].x, &p[i].y, &p[i].val);
		sort(1+all(p));
		vv<line> t((n*(n-1))/2);
		for(int i = 1, l = 0; i <= n-1; ++i)
				for(int j = i+1; j <= n; ++j, ++l) t[l] = line(p[i].x, p[i].y, p[j].x, p[j].y, i, j);
		sort(all(t));
		//~ for(line &u : t) printf("%f %f %d %d\n", u.a, u.b, u.x1, u.x2);
		
		vv<ll> pf(n+1);
		vv<int> pos(n+1);
		for(int i = 1; i <= n; ++i) pf[i] = pf[i-1]+p[i].val, pos[i] = i;
		seg seg; seg.init(n, pf);
		
		
		ll result = max(0ll, seg.query());
		//~ printf("%lld\n", result);
		//~ for(int i = 1; i <= n; ++i) printf("%lld ", pf[i]);
		//~ pn;
		for(int i = 0; i < ssize(t); ++i){
				int a = t[i].i, b = t[i].j; assert(abs(pos[a]-pos[b]) == 1);
				if(pos[b] < pos[a]) swap(a, b);
				pf[pos[a]] += p[b].val-p[a].val;
				swap(pos[a], pos[b]);
				seg.update(pos[a], pf[pos[a]]), seg.update(pos[b], pf[pos[b]]);
				
				while(i+1 < ssize(t) && equal(t[i+1].a, t[i].a)){
						++i;
						a = t[i].i, b = t[i].j; assert(abs(pos[a]-pos[b]) == 1);
						if(pos[b] < pos[a]) swap(a, b);
						pf[pos[a]] += p[b].val-p[a].val;
						swap(pos[a], pos[b]);
						seg.update(pos[a], pf[pos[a]]), seg.update(pos[b], pf[pos[b]]);
				}
				result = max(result, seg.query());
				//~ printf("%lld\n", seg.query());
				//~ for(int j = 1; j <= n; ++j) printf("%lld ", pf[j]);
				//~ pn;
		}
		printf("%lld\n", result);
}
signed main(){
		int T = 1;
		//~ scanf("%d", &T);
		//~ ios_base::sync_with_stdio(0); cin.tie(0); //cin >> T;
		for(++T; --T; ) answer();
		return 0;
}

Compilation message

bulldozer.cpp: In function 'void answer()':
bulldozer.cpp:79:15: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   79 |   int n; scanf("%lld", &n);
      |          ~~~~~^~~~~~~~~~~~
bulldozer.cpp:81:36: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   81 |   for(int i = 1; i <= n; ++i) scanf("%lld%lld%lld", &p[i].x, &p[i].y, &p[i].val);
      |                               ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 600 KB Output is correct
2 Correct 1 ms 604 KB Output is correct
3 Correct 1 ms 604 KB Output is correct
4 Correct 1 ms 600 KB Output is correct
5 Correct 1 ms 604 KB Output is correct
6 Correct 1 ms 600 KB Output is correct
7 Correct 2 ms 604 KB Output is correct
8 Correct 1 ms 604 KB Output is correct
9 Correct 1 ms 604 KB Output is correct
10 Correct 1 ms 604 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct

Subtask #2
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 600 KB Output is correct
2 Correct 1 ms 604 KB Output is correct
3 Correct 1 ms 604 KB Output is correct
4 Correct 1 ms 604 KB Output is correct
5 Correct 2 ms 600 KB Output is correct
6 Correct 1 ms 600 KB Output is correct
7 Correct 1 ms 604 KB Output is correct
8 Correct 1 ms 604 KB Output is correct
9 Correct 1 ms 600 KB Output is correct
10 Correct 1 ms 856 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 0 ms 348 KB Output is correct
15 Correct 1 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 1 ms 344 KB Output is correct
18 Correct 1 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 1 ms 348 KB Output is correct
21 Correct 1 ms 604 KB Output is correct
22 Correct 2 ms 604 KB Output is correct
23 Correct 1 ms 604 KB Output is correct
24 Correct 1 ms 604 KB Output is correct
25 Correct 1 ms 604 KB Output is correct
26 Correct 1 ms 604 KB Output is correct
27 Correct 1 ms 604 KB Output is correct
28 Correct 1 ms 604 KB Output is correct
29 Correct 1 ms 604 KB Output is correct
30 Correct 1 ms 600 KB Output is correct
31 Correct 1 ms 604 KB Output is correct
32 Correct 1 ms 604 KB Output is correct

Subtask #3
35.0 / 35.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 600 KB Output is correct
2 Correct 1 ms 604 KB Output is correct
3 Correct 1 ms 604 KB Output is correct
4 Correct 1 ms 604 KB Output is correct
5 Correct 2 ms 600 KB Output is correct
6 Correct 1 ms 600 KB Output is correct
7 Correct 1 ms 604 KB Output is correct
8 Correct 1 ms 604 KB Output is correct
9 Correct 1 ms 600 KB Output is correct
10 Correct 1 ms 856 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 0 ms 348 KB Output is correct
15 Correct 1 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 1 ms 344 KB Output is correct
18 Correct 1 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 1 ms 348 KB Output is correct
21 Correct 1 ms 604 KB Output is correct
22 Correct 2 ms 604 KB Output is correct
23 Correct 1 ms 604 KB Output is correct
24 Correct 1 ms 604 KB Output is correct
25 Correct 1 ms 604 KB Output is correct
26 Correct 1 ms 604 KB Output is correct
27 Correct 1 ms 604 KB Output is correct
28 Correct 1 ms 604 KB Output is correct
29 Correct 1 ms 604 KB Output is correct
30 Correct 1 ms 600 KB Output is correct
31 Correct 1 ms 604 KB Output is correct
32 Correct 1 ms 604 KB Output is correct
33 Correct 645 ms 125816 KB Output is correct
34 Correct 592 ms 126112 KB Output is correct
35 Correct 595 ms 125780 KB Output is correct
36 Correct 580 ms 125780 KB Output is correct
37 Correct 588 ms 125704 KB Output is correct
38 Correct 587 ms 125652 KB Output is correct
39 Correct 590 ms 125780 KB Output is correct
40 Correct 588 ms 125780 KB Output is correct
41 Correct 587 ms 125652 KB Output is correct
42 Correct 586 ms 125780 KB Output is correct
43 Correct 590 ms 125648 KB Output is correct
44 Correct 584 ms 125780 KB Output is correct
45 Correct 587 ms 125780 KB Output is correct
46 Correct 582 ms 125780 KB Output is correct
47 Correct 572 ms 125780 KB Output is correct
48 Correct 582 ms 125764 KB Output is correct
49 Correct 594 ms 125660 KB Output is correct
50 Correct 584 ms 126032 KB Output is correct
51 Correct 579 ms 125528 KB Output is correct
52 Correct 589 ms 125788 KB Output is correct
53 Correct 576 ms 125784 KB Output is correct
54 Correct 595 ms 125780 KB Output is correct

Subtask #4
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 600 KB Output is correct
2 Correct 1 ms 604 KB Output is correct
3 Correct 1 ms 604 KB Output is correct
4 Correct 1 ms 604 KB Output is correct
5 Correct 2 ms 600 KB Output is correct
6 Correct 1 ms 600 KB Output is correct
7 Correct 1 ms 604 KB Output is correct
8 Correct 1 ms 604 KB Output is correct
9 Correct 1 ms 600 KB Output is correct
10 Correct 1 ms 856 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 0 ms 348 KB Output is correct
15 Correct 1 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 1 ms 344 KB Output is correct
18 Correct 1 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 1 ms 348 KB Output is correct
21 Correct 1 ms 604 KB Output is correct
22 Correct 2 ms 604 KB Output is correct
23 Correct 1 ms 604 KB Output is correct
24 Correct 1 ms 604 KB Output is correct
25 Correct 1 ms 604 KB Output is correct
26 Correct 1 ms 604 KB Output is correct
27 Correct 1 ms 604 KB Output is correct
28 Correct 1 ms 604 KB Output is correct
29 Correct 1 ms 604 KB Output is correct
30 Correct 1 ms 600 KB Output is correct
31 Correct 1 ms 604 KB Output is correct
32 Correct 1 ms 604 KB Output is correct
33 Correct 645 ms 125816 KB Output is correct
34 Correct 592 ms 126112 KB Output is correct
35 Correct 595 ms 125780 KB Output is correct
36 Correct 580 ms 125780 KB Output is correct
37 Correct 588 ms 125704 KB Output is correct
38 Correct 587 ms 125652 KB Output is correct
39 Correct 590 ms 125780 KB Output is correct
40 Correct 588 ms 125780 KB Output is correct
41 Correct 587 ms 125652 KB Output is correct
42 Correct 586 ms 125780 KB Output is correct
43 Correct 590 ms 125648 KB Output is correct
44 Correct 584 ms 125780 KB Output is correct
45 Correct 587 ms 125780 KB Output is correct
46 Correct 582 ms 125780 KB Output is correct
47 Correct 572 ms 125780 KB Output is correct
48 Correct 582 ms 125764 KB Output is correct
49 Correct 594 ms 125660 KB Output is correct
50 Correct 584 ms 126032 KB Output is correct
51 Correct 579 ms 125528 KB Output is correct
52 Correct 589 ms 125788 KB Output is correct
53 Correct 576 ms 125784 KB Output is correct
54 Correct 595 ms 125780 KB Output is correct
55 Correct 578 ms 125524 KB Output is correct
56 Correct 586 ms 125648 KB Output is correct
57 Correct 598 ms 125648 KB Output is correct
58 Correct 582 ms 125780 KB Output is correct
59 Correct 583 ms 125776 KB Output is correct
60 Correct 592 ms 125648 KB Output is correct
61 Correct 586 ms 125780 KB Output is correct
62 Correct 589 ms 125672 KB Output is correct
63 Correct 589 ms 126040 KB Output is correct
64 Correct 584 ms 125788 KB Output is correct
65 Correct 582 ms 125780 KB Output is correct
66 Correct 606 ms 125776 KB Output is correct
67 Correct 582 ms 125776 KB Output is correct
68 Correct 588 ms 125776 KB Output is correct
69 Correct 574 ms 125572 KB Output is correct
70 Correct 595 ms 125648 KB Output is correct
71 Correct 578 ms 125656 KB Output is correct
72 Correct 589 ms 125780 KB Output is correct
73 Correct 592 ms 125780 KB Output is correct
74 Correct 595 ms 125656 KB Output is correct

Subtask #5
0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 600 KB Output is correct
2 Correct 1 ms 604 KB Output is correct
3 Correct 1 ms 604 KB Output is correct
4 Correct 1 ms 600 KB Output is correct
5 Correct 1 ms 604 KB Output is correct
6 Correct 1 ms 600 KB Output is correct
7 Correct 2 ms 604 KB Output is correct
8 Correct 1 ms 604 KB Output is correct
9 Correct 1 ms 604 KB Output is correct
10 Correct 1 ms 604 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 1 ms 600 KB Output is correct
17 Correct 1 ms 604 KB Output is correct
18 Correct 1 ms 604 KB Output is correct
19 Correct 1 ms 604 KB Output is correct
20 Correct 2 ms 600 KB Output is correct
21 Correct 1 ms 600 KB Output is correct
22 Correct 1 ms 604 KB Output is correct
23 Correct 1 ms 604 KB Output is correct
24 Correct 1 ms 600 KB Output is correct
25 Correct 1 ms 856 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 1 ms 348 KB Output is correct
31 Correct 0 ms 348 KB Output is correct
32 Correct 1 ms 344 KB Output is correct
33 Correct 1 ms 348 KB Output is correct
34 Correct 0 ms 348 KB Output is correct
35 Correct 1 ms 348 KB Output is correct
36 Correct 1 ms 604 KB Output is correct
37 Correct 2 ms 604 KB Output is correct
38 Correct 1 ms 604 KB Output is correct
39 Correct 1 ms 604 KB Output is correct
40 Correct 1 ms 604 KB Output is correct
41 Correct 1 ms 604 KB Output is correct
42 Correct 1 ms 604 KB Output is correct
43 Correct 1 ms 604 KB Output is correct
44 Correct 1 ms 604 KB Output is correct
45 Correct 1 ms 600 KB Output is correct
46 Correct 1 ms 604 KB Output is correct
47 Correct 1 ms 604 KB Output is correct
48 Correct 645 ms 125816 KB Output is correct
49 Correct 592 ms 126112 KB Output is correct
50 Correct 595 ms 125780 KB Output is correct
51 Correct 580 ms 125780 KB Output is correct
52 Correct 588 ms 125704 KB Output is correct
53 Correct 587 ms 125652 KB Output is correct
54 Correct 590 ms 125780 KB Output is correct
55 Correct 588 ms 125780 KB Output is correct
56 Correct 587 ms 125652 KB Output is correct
57 Correct 586 ms 125780 KB Output is correct
58 Correct 590 ms 125648 KB Output is correct
59 Correct 584 ms 125780 KB Output is correct
60 Correct 587 ms 125780 KB Output is correct
61 Correct 582 ms 125780 KB Output is correct
62 Correct 572 ms 125780 KB Output is correct
63 Correct 582 ms 125764 KB Output is correct
64 Correct 594 ms 125660 KB Output is correct
65 Correct 584 ms 126032 KB Output is correct
66 Correct 579 ms 125528 KB Output is correct
67 Correct 589 ms 125788 KB Output is correct
68 Correct 576 ms 125784 KB Output is correct
69 Correct 595 ms 125780 KB Output is correct
70 Correct 578 ms 125524 KB Output is correct
71 Correct 586 ms 125648 KB Output is correct
72 Correct 598 ms 125648 KB Output is correct
73 Correct 582 ms 125780 KB Output is correct
74 Correct 583 ms 125776 KB Output is correct
75 Correct 592 ms 125648 KB Output is correct
76 Correct 586 ms 125780 KB Output is correct
77 Correct 589 ms 125672 KB Output is correct
78 Correct 589 ms 126040 KB Output is correct
79 Correct 584 ms 125788 KB Output is correct
80 Correct 582 ms 125780 KB Output is correct
81 Correct 606 ms 125776 KB Output is correct
82 Correct 582 ms 125776 KB Output is correct
83 Correct 588 ms 125776 KB Output is correct
84 Correct 574 ms 125572 KB Output is correct
85 Correct 595 ms 125648 KB Output is correct
86 Correct 578 ms 125656 KB Output is correct
87 Correct 589 ms 125780 KB Output is correct
88 Correct 592 ms 125780 KB Output is correct
89 Correct 595 ms 125656 KB Output is correct
90 Correct 603 ms 125648 KB Output is correct
91 Correct 580 ms 125780 KB Output is correct
92 Correct 587 ms 125648 KB Output is correct
93 Correct 587 ms 125652 KB Output is correct
94 Correct 592 ms 125776 KB Output is correct
95 Correct 584 ms 125780 KB Output is correct
96 Correct 576 ms 125780 KB Output is correct
97 Correct 593 ms 125660 KB Output is correct
98 Correct 585 ms 125652 KB Output is correct
99 Correct 578 ms 125776 KB Output is correct
100 Correct 637 ms 125780 KB Output is correct
101 Correct 650 ms 125776 KB Output is correct
102 Correct 637 ms 125780 KB Output is correct
103 Correct 651 ms 125912 KB Output is correct
104 Correct 640 ms 125652 KB Output is correct
105 Correct 607 ms 125860 KB Output is correct
106 Correct 602 ms 125648 KB Output is correct
107 Correct 587 ms 126032 KB Output is correct
108 Correct 599 ms 125780 KB Output is correct
109 Correct 587 ms 125984 KB Output is correct
110 Correct 644 ms 125864 KB Output is correct
111 Correct 645 ms 125916 KB Output is correct
112 Correct 652 ms 125780 KB Output is correct
113 Correct 644 ms 125776 KB Output is correct
114 Correct 651 ms 125776 KB Output is correct
115 Correct 656 ms 125904 KB Output is correct
116 Correct 655 ms 126036 KB Output is correct
117 Correct 654 ms 125720 KB Output is correct
118 Correct 652 ms 126032 KB Output is correct
119 Correct 644 ms 125904 KB Output is correct
120 Incorrect 0 ms 344 KB Output isn't correct
121 Halted 0 ms 0 KB -