oj.uz

Submission #102716

# Submission time Handle Problem Language Result Execution time Memory
102716 2019-03-27T08:18:34 Z Minnakhmetov Bulldozer (JOI17_bulldozer) C++14
75 / 100
 1109 ms 16356 KB 
#include <algorithm>
#include <bitset>
#include <complex>
#include <deque>
#include <exception>
#include <fstream>
#include <functional>
#include <iomanip>
#include <ios>
#include <iosfwd>
#include <iostream>
#include <istream>
#include <iterator>
#include <limits>
#include <list>
#include <locale>
#include <map>
#include <memory>
#include <new>
#include <numeric>
#include <ostream>
#include <queue>
#include <set>
#include <sstream>
#include <stack>
#include <stdexcept>
#include <streambuf>
#include <string>
#include <typeinfo>
#include <utility>
#include <valarray>
#include <vector>
#include <cstring>
#include <unordered_map>
#include <unordered_set>

#pragma GCC optimize("Ofast")
#pragma GCC optimize("unroll-loops")


using namespace std;

#define ll long long
#define all(aaa) aaa.begin(), aaa.end()
#pragma warning(disable : 4996)

ll gcd(ll a, ll b) {
	return a ? gcd(b % a, a) : b;
}

struct P {
	ll x, y, w;
	ll operator * (const P &oth) const {
		return x * oth.y - y * oth.x;
	}
	ll operator / (const P &oth) const {
		return x * oth.x + y * oth.y;
	}
};

P operator - (const P &a, const P &b) {
	return { a.x - b.x, a.y - b.y };
}

const int N = 2005;
P a[N];
ll t[N * 4], mnp[N * 4], mxp[N * 4], pref[N], up[N * 4];
int pos[N];
int n;
pair<int, int> z[N * N];

void mrg(int v) {
	t[v] = max(t[v * 2], t[v * 2 + 1]);
	t[v] = max(t[v], mxp[v * 2 + 1] - mnp[v * 2]);
	mxp[v] = max(mxp[v * 2], mxp[v * 2 + 1]);
	mnp[v] = min(mnp[v * 2], mnp[v * 2 + 1]);
}

void build(int v = 1, int L = 0, int R = n) {
	if (L == R) {
		t[v] = 0;
		mxp[v] = mnp[v] = pref[L];
	}
	else {
		int m = (L + R) >> 1;
		build(v * 2, L, m);
		build(v * 2 + 1, m + 1, R);
		mrg(v);
	}
}

void push(int v, int L, int R) {
	if (up[v]) {
		if (L != R) {
			up[v * 2] += up[v];
			up[v * 2 + 1] += up[v];
		}
		mnp[v] += up[v];
		mxp[v] += up[v];
		up[v] = 0;
	}
}

void upd(int l, int r, int x, int v = 1, int L = 0, int R = n) {
	push(v, L, R);
	if (l > r)
		return;
	if (l == L && r == R) {
		up[v] += x;
		push(v, L, R);
	}
	else {
		int m = (L + R) >> 1;
		upd(l, min(m, r), x, v * 2, L, m);
		upd(max(m + 1, l), r, x, v * 2 + 1, m + 1, R);
		mrg(v);
	}
}

signed main() {
#ifdef HOME
	freopen("input.txt", "r", stdin);
	freopen("output.txt", "w", stdout);
#endif
	ios_base::sync_with_stdio(0);
	cin.tie(0);

	cin >> n;

	for (int i = 1; i <= n; i++) {
		int x, y, w;
		cin >> x >> y >> w;
		a[i] = { x, y, w };
	}

	sort(a + 1, a + n + 1, [](P &a, P &b) {
		return a.x == b.x ? a.y > b.y : a.x < b.x;
	});

	int ct = 0;
	for (int i = 1; i <= n; i++) {
		pos[i] = i;
		pref[i] = pref[i - 1] + a[i].w;
		for (int j = i + 1; j <= n; j++) {
			z[ct++] = { i, j };
		}
	}

	build();

	sort(z, z + ct, [](pair<int, int> &p, pair<int, int> &q) {
		P vp = a[p.second] - a[p.first], vq = a[q.second] - a[q.first];
		if (vp.x > 0 || vp.x == 0 && vp.y < 0) {
			swap(p.first, p.second);
			vp.x = -vp.x;
			vp.y = -vp.y;
		}
		if (vq.x > 0 || vq.x == 0 && vq.y < 0) {
			swap(q.first, q.second);
			vq.x = -vq.x;
			vq.y = -vq.y;
		}
		ll prod = vp * vq;
		if (prod != 0)
			return prod > 0;
		prod = (a[p.second] - a[p.first]) / (a[q.first] - a[p.first]);
		if (prod != 0)
			return prod > 0;
		return vp.x < vq.x || vp.y < vq.y;
	});;


	ll ans = t[1];

	for (int i = 0; i < ct; i++) {
		int x = z[i].first,
			y = z[i].second;
		if (pos[x] > pos[y]) {
			swap(x, y);
		}

		upd(pos[x], pos[y] - 1, -a[x].w);
		upd(pos[x], pos[y] - 1, a[y].w);

		swap(pos[x], pos[y]);

		if (i == ct - 1 || (a[z[i + 1].second] - a[z[i + 1].first]) *
			(a[y] - a[x]) != 0) {
			ans = max(ans, t[1]);
		}
	}

	cout << ans;

	return 0;
}

Compilation message

bulldozer.cpp:45:0: warning: ignoring #pragma warning  [-Wunknown-pragmas]
 #pragma warning(disable : 4996)
 
bulldozer.cpp: In lambda function:
bulldozer.cpp:153:29: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   if (vp.x > 0 || vp.x == 0 && vp.y < 0) {
                   ~~~~~~~~~~^~~~~~~~~~~
bulldozer.cpp:158:29: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   if (vq.x > 0 || vq.x == 0 && vq.y < 0) {
                   ~~~~~~~~~~^~~~~~~~~~~

Subtask #1
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 384 KB Output is correct
2 Incorrect 3 ms 384 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 384 KB Output is correct
2 Correct 4 ms 384 KB Output is correct
3 Correct 3 ms 384 KB Output is correct
4 Correct 3 ms 384 KB Output is correct
5 Correct 3 ms 384 KB Output is correct
6 Correct 3 ms 384 KB Output is correct
7 Correct 3 ms 384 KB Output is correct
8 Correct 3 ms 384 KB Output is correct
9 Correct 4 ms 384 KB Output is correct
10 Correct 4 ms 384 KB Output is correct
11 Correct 2 ms 384 KB Output is correct
12 Correct 2 ms 384 KB Output is correct
13 Correct 2 ms 384 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 384 KB Output is correct
17 Correct 3 ms 384 KB Output is correct
18 Correct 2 ms 384 KB Output is correct
19 Correct 2 ms 384 KB Output is correct
20 Correct 2 ms 384 KB Output is correct
21 Correct 3 ms 384 KB Output is correct
22 Correct 3 ms 384 KB Output is correct
23 Correct 3 ms 384 KB Output is correct
24 Correct 4 ms 512 KB Output is correct
25 Correct 3 ms 384 KB Output is correct
26 Correct 3 ms 384 KB Output is correct
27 Correct 3 ms 384 KB Output is correct
28 Correct 3 ms 384 KB Output is correct
29 Correct 4 ms 384 KB Output is correct
30 Correct 3 ms 384 KB Output is correct
31 Correct 4 ms 384 KB Output is correct
32 Correct 3 ms 384 KB Output is correct

Subtask #3
35.0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 384 KB Output is correct
2 Correct 4 ms 384 KB Output is correct
3 Correct 3 ms 384 KB Output is correct
4 Correct 3 ms 384 KB Output is correct
5 Correct 3 ms 384 KB Output is correct
6 Correct 3 ms 384 KB Output is correct
7 Correct 3 ms 384 KB Output is correct
8 Correct 3 ms 384 KB Output is correct
9 Correct 4 ms 384 KB Output is correct
10 Correct 4 ms 384 KB Output is correct
11 Correct 2 ms 384 KB Output is correct
12 Correct 2 ms 384 KB Output is correct
13 Correct 2 ms 384 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 384 KB Output is correct
17 Correct 3 ms 384 KB Output is correct
18 Correct 2 ms 384 KB Output is correct
19 Correct 2 ms 384 KB Output is correct
20 Correct 2 ms 384 KB Output is correct
21 Correct 3 ms 384 KB Output is correct
22 Correct 3 ms 384 KB Output is correct
23 Correct 3 ms 384 KB Output is correct
24 Correct 4 ms 512 KB Output is correct
25 Correct 3 ms 384 KB Output is correct
26 Correct 3 ms 384 KB Output is correct
27 Correct 3 ms 384 KB Output is correct
28 Correct 3 ms 384 KB Output is correct
29 Correct 4 ms 384 KB Output is correct
30 Correct 3 ms 384 KB Output is correct
31 Correct 4 ms 384 KB Output is correct
32 Correct 3 ms 384 KB Output is correct
33 Correct 1042 ms 16240 KB Output is correct
34 Correct 1027 ms 16256 KB Output is correct
35 Correct 1012 ms 16248 KB Output is correct
36 Correct 1049 ms 16244 KB Output is correct
37 Correct 1056 ms 16248 KB Output is correct
38 Correct 1028 ms 16352 KB Output is correct
39 Correct 1035 ms 16340 KB Output is correct
40 Correct 1016 ms 16348 KB Output is correct
41 Correct 1050 ms 16252 KB Output is correct
42 Correct 1036 ms 16252 KB Output is correct
43 Correct 1036 ms 16248 KB Output is correct
44 Correct 1014 ms 16220 KB Output is correct
45 Correct 1109 ms 16276 KB Output is correct
46 Correct 999 ms 16348 KB Output is correct
47 Correct 1031 ms 16344 KB Output is correct
48 Correct 1032 ms 16248 KB Output is correct
49 Correct 1058 ms 16256 KB Output is correct
50 Correct 1026 ms 16352 KB Output is correct
51 Correct 1104 ms 16352 KB Output is correct
52 Correct 1046 ms 16248 KB Output is correct
53 Correct 1058 ms 16352 KB Output is correct
54 Correct 1006 ms 16252 KB Output is correct

Subtask #4
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 384 KB Output is correct
2 Correct 4 ms 384 KB Output is correct
3 Correct 3 ms 384 KB Output is correct
4 Correct 3 ms 384 KB Output is correct
5 Correct 3 ms 384 KB Output is correct
6 Correct 3 ms 384 KB Output is correct
7 Correct 3 ms 384 KB Output is correct
8 Correct 3 ms 384 KB Output is correct
9 Correct 4 ms 384 KB Output is correct
10 Correct 4 ms 384 KB Output is correct
11 Correct 2 ms 384 KB Output is correct
12 Correct 2 ms 384 KB Output is correct
13 Correct 2 ms 384 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 384 KB Output is correct
17 Correct 3 ms 384 KB Output is correct
18 Correct 2 ms 384 KB Output is correct
19 Correct 2 ms 384 KB Output is correct
20 Correct 2 ms 384 KB Output is correct
21 Correct 3 ms 384 KB Output is correct
22 Correct 3 ms 384 KB Output is correct
23 Correct 3 ms 384 KB Output is correct
24 Correct 4 ms 512 KB Output is correct
25 Correct 3 ms 384 KB Output is correct
26 Correct 3 ms 384 KB Output is correct
27 Correct 3 ms 384 KB Output is correct
28 Correct 3 ms 384 KB Output is correct
29 Correct 4 ms 384 KB Output is correct
30 Correct 3 ms 384 KB Output is correct
31 Correct 4 ms 384 KB Output is correct
32 Correct 3 ms 384 KB Output is correct
33 Correct 1042 ms 16240 KB Output is correct
34 Correct 1027 ms 16256 KB Output is correct
35 Correct 1012 ms 16248 KB Output is correct
36 Correct 1049 ms 16244 KB Output is correct
37 Correct 1056 ms 16248 KB Output is correct
38 Correct 1028 ms 16352 KB Output is correct
39 Correct 1035 ms 16340 KB Output is correct
40 Correct 1016 ms 16348 KB Output is correct
41 Correct 1050 ms 16252 KB Output is correct
42 Correct 1036 ms 16252 KB Output is correct
43 Correct 1036 ms 16248 KB Output is correct
44 Correct 1014 ms 16220 KB Output is correct
45 Correct 1109 ms 16276 KB Output is correct
46 Correct 999 ms 16348 KB Output is correct
47 Correct 1031 ms 16344 KB Output is correct
48 Correct 1032 ms 16248 KB Output is correct
49 Correct 1058 ms 16256 KB Output is correct
50 Correct 1026 ms 16352 KB Output is correct
51 Correct 1104 ms 16352 KB Output is correct
52 Correct 1046 ms 16248 KB Output is correct
53 Correct 1058 ms 16352 KB Output is correct
54 Correct 1006 ms 16252 KB Output is correct
55 Correct 1020 ms 16256 KB Output is correct
56 Correct 1014 ms 16248 KB Output is correct
57 Correct 1031 ms 16344 KB Output is correct
58 Correct 1029 ms 16356 KB Output is correct
59 Correct 1010 ms 16348 KB Output is correct
60 Correct 1020 ms 16252 KB Output is correct
61 Correct 1018 ms 16248 KB Output is correct
62 Correct 1029 ms 16248 KB Output is correct
63 Correct 1020 ms 16256 KB Output is correct
64 Correct 1012 ms 16344 KB Output is correct
65 Correct 1018 ms 16344 KB Output is correct
66 Correct 1068 ms 16352 KB Output is correct
67 Correct 1056 ms 16244 KB Output is correct
68 Correct 1069 ms 16248 KB Output is correct
69 Correct 1046 ms 16252 KB Output is correct
70 Correct 1034 ms 16248 KB Output is correct
71 Correct 1045 ms 16348 KB Output is correct
72 Correct 1069 ms 16348 KB Output is correct
73 Correct 1010 ms 16352 KB Output is correct
74 Correct 1002 ms 16248 KB Output is correct

Subtask #5
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 384 KB Output is correct
2 Incorrect 3 ms 384 KB Output isn't correct
3 Halted 0 ms 0 KB -