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답안 #126504

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
126504 2019-07-08T01:41:47 Z ainta Arranging Tickets (JOI17_arranging_tickets) C++17
85 / 100
 6000 ms 16632 KB 
#include<cstdio>
#include<algorithm>
#define SZ 262144
using namespace std;
int n, m;
struct point {
	int a, b, c;
	bool operator <(point &p)const {
		return a < p.a;
	}
}w[201000];
long long S[201000], Z[201000], H[201000];
struct Tree {
	long long Mn[SZ + SZ], K[SZ + SZ];
	void UDT(int nd) {
		Mn[nd] = min(Mn[nd * 2], Mn[nd * 2 + 1]);
	}
	void init(int nd, int b, int e) {
		K[nd] = 0;
		if (b == e) {
			Mn[nd] = H[b];
			return;
		}
		int m = (b + e) >> 1;
		init(nd * 2, b, m);
		init(nd * 2 + 1, m + 1, e);
		UDT(nd);
	}
	void Add2(int nd, int x) {
		Mn[nd] += x;
		K[nd] += x;
	}
	void Spread(int nd) {
		Add2(nd * 2, K[nd]);
		Add2(nd * 2 + 1, K[nd]);
		K[nd] = 0;
	}
	void Add(int nd, int b, int e, int s, int l, int x) {
		if (s > l)return;
		if (s <= b && e <= l) {
			Add2(nd, x);
			return;
		}
		Spread(nd);
		int m = (b + e) >> 1;
		if (s <= m)Add(nd * 2, b, m, s, l, x);
		if (l > m)Add(nd * 2 + 1, m + 1, e, s, l, x);
		UDT(nd);
	}
	long long Min(int nd, int b, int e, int s, int l) {
		if (s > l)return (long long)1e18;
		if (s <= b && e <= l)return Mn[nd];
		Spread(nd);
		int m = (b + e) >> 1;
		long long r = 1e18;
		if (s <= m)r = min(Min(nd * 2, b, m, s, l), r);
		if (l > m)r = min(Min(nd * 2 + 1, m + 1, e, s, l), r);
		return r;
	}
}T;
int pv;
long long Get() {
	int i;
	T.init(1, 0, n - 1);
	long long res = 0;
	for (i = 1; i <= m; i++) {
		long long t = min(min(T.Min(1, 0, n - 1, 0, w[i].a - 1), T.Min(1, 0, n - 1, w[i].b, n - 1)), (long long)w[i].c);
		res += t;
		T.Add(1, 0, n - 1, 0, w[i].a - 1, -t);
		T.Add(1, 0, n - 1, w[i].b, n - 1, -t);
	}
	return res;
}
bool Pos(long long M) {
	int i, j;
	long long bb = Z[pv] - M, ee = M / 2;
	for (i = bb; i <= bb + 1; i++) {
		for (j = 0; j < n; j++) {
			H[j] = (i + M - Z[j]) / 2;
		}
		if (H[0] < i)continue;
		if (Get() >= i)return true;
	}
	return false;
}
int main() {
	int i;
	//freopen("input.txt","r",stdin);
	scanf("%d%d", &n, &m);
	for (i = 1; i <= m; i++) {
		int a, b, c;
		scanf("%d%d%d", &a, &b, &c);
		if (a > b)swap(a, b);
		w[i] = { a,b,c };
		S[a] += c;
		S[b] -= c;
	}
	sort(w + 1, w + m + 1);
	long long Mx = -1;
	pv = -1;
	for (i = 1; i < n; i++) {
		S[i] += S[i - 1];
		if (Mx < S[i]) {
			Mx = S[i];
			pv = i;
		}
	}
	for (i = 1; i <= pv; i++)Z[i] = max(Z[i - 1], S[i]);
	for (i = n - 1; i >= pv; i--)Z[i] = max(Z[i + 1], S[i]);
	long long b = 0, e = Mx - 1, mid, r = Mx;
	while (b <= e) {
		mid = (b + e) >> 1;
		if (Pos(mid)) {
			r = mid;
			e = mid - 1;
		}
		else b = mid + 1;
	}
	printf("%lld\n", r);
}

Compilation message

arranging_tickets.cpp: In function 'int main()':
arranging_tickets.cpp:89:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d", &n, &m);
  ~~~~~^~~~~~~~~~~~~~~~
arranging_tickets.cpp:92:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d%d%d", &a, &b, &c);
   ~~~~~^~~~~~~~~~~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 376 KB Output is correct
4 Correct 2 ms 248 KB Output is correct
5 Correct 2 ms 376 KB Output is correct
6 Correct 2 ms 376 KB Output is correct
7 Correct 2 ms 376 KB Output is correct
8 Correct 2 ms 376 KB Output is correct
9 Correct 2 ms 380 KB Output is correct
10 Correct 2 ms 376 KB Output is correct
11 Correct 2 ms 376 KB Output is correct
12 Correct 2 ms 504 KB Output is correct
13 Correct 2 ms 376 KB Output is correct
14 Correct 2 ms 376 KB Output is correct
15 Correct 2 ms 380 KB Output is correct

Subtask #2
35.0 / 35.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 376 KB Output is correct
4 Correct 2 ms 248 KB Output is correct
5 Correct 2 ms 376 KB Output is correct
6 Correct 2 ms 376 KB Output is correct
7 Correct 2 ms 376 KB Output is correct
8 Correct 2 ms 376 KB Output is correct
9 Correct 2 ms 380 KB Output is correct
10 Correct 2 ms 376 KB Output is correct
11 Correct 2 ms 376 KB Output is correct
12 Correct 2 ms 504 KB Output is correct
13 Correct 2 ms 376 KB Output is correct
14 Correct 2 ms 376 KB Output is correct
15 Correct 2 ms 380 KB Output is correct
16 Correct 4 ms 376 KB Output is correct
17 Correct 3 ms 376 KB Output is correct
18 Correct 3 ms 424 KB Output is correct
19 Correct 4 ms 376 KB Output is correct
20 Correct 3 ms 376 KB Output is correct
21 Correct 3 ms 376 KB Output is correct
22 Correct 3 ms 376 KB Output is correct
23 Correct 3 ms 376 KB Output is correct
24 Correct 3 ms 376 KB Output is correct
25 Correct 3 ms 376 KB Output is correct
26 Correct 3 ms 452 KB Output is correct
27 Correct 3 ms 376 KB Output is correct

Subtask #3
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 376 KB Output is correct
4 Correct 2 ms 248 KB Output is correct
5 Correct 2 ms 376 KB Output is correct
6 Correct 2 ms 376 KB Output is correct
7 Correct 2 ms 376 KB Output is correct
8 Correct 2 ms 376 KB Output is correct
9 Correct 2 ms 380 KB Output is correct
10 Correct 2 ms 376 KB Output is correct
11 Correct 2 ms 376 KB Output is correct
12 Correct 2 ms 504 KB Output is correct
13 Correct 2 ms 376 KB Output is correct
14 Correct 2 ms 376 KB Output is correct
15 Correct 2 ms 380 KB Output is correct
16 Correct 4 ms 376 KB Output is correct
17 Correct 3 ms 376 KB Output is correct
18 Correct 3 ms 424 KB Output is correct
19 Correct 4 ms 376 KB Output is correct
20 Correct 3 ms 376 KB Output is correct
21 Correct 3 ms 376 KB Output is correct
22 Correct 3 ms 376 KB Output is correct
23 Correct 3 ms 376 KB Output is correct
24 Correct 3 ms 376 KB Output is correct
25 Correct 3 ms 376 KB Output is correct
26 Correct 3 ms 452 KB Output is correct
27 Correct 3 ms 376 KB Output is correct
28 Correct 20 ms 632 KB Output is correct
29 Correct 20 ms 632 KB Output is correct
30 Correct 23 ms 632 KB Output is correct
31 Correct 22 ms 632 KB Output is correct
32 Correct 23 ms 632 KB Output is correct
33 Correct 20 ms 760 KB Output is correct
34 Correct 21 ms 632 KB Output is correct
35 Correct 21 ms 632 KB Output is correct
36 Correct 22 ms 684 KB Output is correct
37 Correct 21 ms 632 KB Output is correct
38 Correct 11 ms 636 KB Output is correct
39 Correct 17 ms 632 KB Output is correct

Subtask #4
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 376 KB Output is correct
4 Correct 2 ms 248 KB Output is correct
5 Correct 2 ms 376 KB Output is correct
6 Correct 2 ms 376 KB Output is correct
7 Correct 2 ms 376 KB Output is correct
8 Correct 2 ms 376 KB Output is correct
9 Correct 2 ms 380 KB Output is correct
10 Correct 2 ms 376 KB Output is correct
11 Correct 2 ms 376 KB Output is correct
12 Correct 2 ms 504 KB Output is correct
13 Correct 2 ms 376 KB Output is correct
14 Correct 2 ms 376 KB Output is correct
15 Correct 2 ms 380 KB Output is correct
16 Correct 4 ms 376 KB Output is correct
17 Correct 3 ms 376 KB Output is correct
18 Correct 3 ms 424 KB Output is correct
19 Correct 4 ms 376 KB Output is correct
20 Correct 3 ms 376 KB Output is correct
21 Correct 3 ms 376 KB Output is correct
22 Correct 3 ms 376 KB Output is correct
23 Correct 3 ms 376 KB Output is correct
24 Correct 3 ms 376 KB Output is correct
25 Correct 3 ms 376 KB Output is correct
26 Correct 3 ms 452 KB Output is correct
27 Correct 3 ms 376 KB Output is correct
28 Correct 20 ms 632 KB Output is correct
29 Correct 20 ms 632 KB Output is correct
30 Correct 23 ms 632 KB Output is correct
31 Correct 22 ms 632 KB Output is correct
32 Correct 23 ms 632 KB Output is correct
33 Correct 20 ms 760 KB Output is correct
34 Correct 21 ms 632 KB Output is correct
35 Correct 21 ms 632 KB Output is correct
36 Correct 22 ms 684 KB Output is correct
37 Correct 21 ms 632 KB Output is correct
38 Correct 11 ms 636 KB Output is correct
39 Correct 17 ms 632 KB Output is correct
40 Correct 1745 ms 15884 KB Output is correct
41 Correct 1629 ms 15992 KB Output is correct
42 Correct 1692 ms 15868 KB Output is correct
43 Correct 2103 ms 15864 KB Output is correct
44 Correct 2416 ms 15992 KB Output is correct
45 Correct 2545 ms 15920 KB Output is correct
46 Correct 1521 ms 15708 KB Output is correct
47 Correct 1489 ms 15740 KB Output is correct
48 Correct 1503 ms 15608 KB Output is correct
49 Correct 1265 ms 9348 KB Output is correct
50 Correct 1008 ms 9464 KB Output is correct
51 Correct 1187 ms 9464 KB Output is correct

Subtask #5
0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 376 KB Output is correct
4 Correct 2 ms 248 KB Output is correct
5 Correct 2 ms 376 KB Output is correct
6 Correct 2 ms 376 KB Output is correct
7 Correct 2 ms 376 KB Output is correct
8 Correct 2 ms 376 KB Output is correct
9 Correct 2 ms 380 KB Output is correct
10 Correct 2 ms 376 KB Output is correct
11 Correct 2 ms 376 KB Output is correct
12 Correct 2 ms 504 KB Output is correct
13 Correct 2 ms 376 KB Output is correct
14 Correct 2 ms 376 KB Output is correct
15 Correct 2 ms 380 KB Output is correct
16 Correct 4 ms 376 KB Output is correct
17 Correct 3 ms 376 KB Output is correct
18 Correct 3 ms 424 KB Output is correct
19 Correct 4 ms 376 KB Output is correct
20 Correct 3 ms 376 KB Output is correct
21 Correct 3 ms 376 KB Output is correct
22 Correct 3 ms 376 KB Output is correct
23 Correct 3 ms 376 KB Output is correct
24 Correct 3 ms 376 KB Output is correct
25 Correct 3 ms 376 KB Output is correct
26 Correct 3 ms 452 KB Output is correct
27 Correct 3 ms 376 KB Output is correct
28 Correct 20 ms 632 KB Output is correct
29 Correct 20 ms 632 KB Output is correct
30 Correct 23 ms 632 KB Output is correct
31 Correct 22 ms 632 KB Output is correct
32 Correct 23 ms 632 KB Output is correct
33 Correct 20 ms 760 KB Output is correct
34 Correct 21 ms 632 KB Output is correct
35 Correct 21 ms 632 KB Output is correct
36 Correct 22 ms 684 KB Output is correct
37 Correct 21 ms 632 KB Output is correct
38 Correct 11 ms 636 KB Output is correct
39 Correct 17 ms 632 KB Output is correct
40 Correct 1745 ms 15884 KB Output is correct
41 Correct 1629 ms 15992 KB Output is correct
42 Correct 1692 ms 15868 KB Output is correct
43 Correct 2103 ms 15864 KB Output is correct
44 Correct 2416 ms 15992 KB Output is correct
45 Correct 2545 ms 15920 KB Output is correct
46 Correct 1521 ms 15708 KB Output is correct
47 Correct 1489 ms 15740 KB Output is correct
48 Correct 1503 ms 15608 KB Output is correct
49 Correct 1265 ms 9348 KB Output is correct
50 Correct 1008 ms 9464 KB Output is correct
51 Correct 1187 ms 9464 KB Output is correct
52 Execution timed out 6097 ms 16632 KB Time limit exceeded
53 Halted 0 ms 0 KB -