답안 #435716

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
435716	2021-06-23T15:39:07 Z	penguinhacker	Toll (BOI17_toll)	C++14	100 / 100	192 ms	13512 KB

toll

#include <bits/stdc++.h>
using namespace std;

#define ll long long
#define ar array

const int mxN=5e4, mxQ=1e4;
int n, m, k, q, ans[mxQ];
ar<int, 2> qry[mxQ];
vector<ar<int, 2>> bef[mxN], aft[mxN];
int tl[mxN][5], tr[mxN][5];

void smin(int& x, int y) {
	if (x==-1||y<x)
		x=y;
}

void solve(int l, int r, vector<int>& v) {
	if (v.empty())
		return;
	assert(l^r);
	int mid=(l+r)/2;
	for (int i=mid*k; i<(mid+1)*k; ++i) {
		memset(tl[i], -1, sizeof(tl[i]));
		memset(tr[i], -1, sizeof(tr[i]));
		tl[i][i%k]=tr[i][i%k]=0;
	}
	for (int i=mid*k-1; i>=l*k; --i) {
		memset(tl[i], -1, sizeof(tl[i]));
		for (int j=0; j<k; ++j)
			for (ar<int, 2> a : aft[i])
				if (tl[a[0]][j]^-1)
					smin(tl[i][j], tl[a[0]][j]+a[1]);
	}
	for (int i=(mid+1)*k; i<min(n, (r+1)*k); ++i) {
		memset(tr[i], -1, sizeof(tr[i]));
		for (int j=0; j<k; ++j)
			for (ar<int, 2> a : bef[i])
				if (tr[a[0]][j]^-1)
					smin(tr[i][j], tr[a[0]][j]+a[1]);
	}
	vector<int> vl, vr;
	for (int i : v) {
		int ql=qry[i][0], qr=qry[i][1];
		assert(l*k<=ql&&qr<(r+1)*k);
		if (qr/k<mid)
			vl.push_back(i);
		else if (ql/k>mid)
			vr.push_back(i);
		else {
			ans[i]=-1;
			for (int j=0; j<k; ++j)
				if (tl[ql][j]^-1&&tr[qr][j]^-1)
					smin(ans[i], tl[ql][j]+tr[qr][j]);
		}
	}
	vector<int>().swap(v);
	solve(l, mid-1, vl);
	solve(mid+1, r, vr);
}

int main() {
	ios::sync_with_stdio(0);
	cin.tie(0);
	cin >> k >> n >> m >> q;
	for (int i=0; i<m; ++i) {
		int u, v, w;
		cin >> u >> v >> w;
		aft[u].push_back({v, w});
		bef[v].push_back({u, w});
	}
	vector<int> inds;
	for (int i=0; i<q; ++i) {
		cin >> qry[i][0] >> qry[i][1];
		if (qry[i][0]/k==qry[i][1]/k)
			ans[i]=-1;
		else
			inds.push_back(i);
	}
	solve(0, (n-1)/k, inds);
	for (int i=0; i<q; ++i)
		cout << ans[i] << "\n";
	return 0;
}

Subtask #1
7.0 / 7.0

#	결과	실행 시간	메모리	Grader output
1	Correct	50 ms	7980 KB	Output is correct
2	Correct	2 ms	2636 KB	Output is correct
3	Correct	2 ms	2684 KB	Output is correct
4	Correct	2 ms	2636 KB	Output is correct
5	Correct	3 ms	2816 KB	Output is correct
6	Correct	3 ms	2764 KB	Output is correct
7	Correct	3 ms	2820 KB	Output is correct
8	Correct	37 ms	8840 KB	Output is correct
9	Correct	37 ms	8644 KB	Output is correct
10	Correct	8 ms	4940 KB	Output is correct

Subtask #2
10.0 / 10.0

#	결과	실행 시간	메모리	Grader output
1	Correct	65 ms	7492 KB	Output is correct
2	Correct	2 ms	2636 KB	Output is correct
3	Correct	2 ms	2636 KB	Output is correct
4	Correct	2 ms	2636 KB	Output is correct
5	Correct	2 ms	2636 KB	Output is correct
6	Correct	2 ms	2636 KB	Output is correct
7	Correct	6 ms	2924 KB	Output is correct
8	Correct	6 ms	3020 KB	Output is correct
9	Correct	34 ms	7396 KB	Output is correct
10	Correct	122 ms	9356 KB	Output is correct
11	Correct	77 ms	7744 KB	Output is correct
12	Correct	57 ms	7532 KB	Output is correct
13	Correct	106 ms	9208 KB	Output is correct
14	Correct	60 ms	7104 KB	Output is correct
15	Correct	49 ms	6464 KB	Output is correct
16	Correct	46 ms	6456 KB	Output is correct

Subtask #3
8.0 / 8.0

#	결과	실행 시간	메모리	Grader output
1	Correct	3 ms	2636 KB	Output is correct
2	Correct	3 ms	2636 KB	Output is correct
3	Correct	2 ms	2636 KB	Output is correct
4	Correct	2 ms	2636 KB	Output is correct
5	Correct	2 ms	2592 KB	Output is correct
6	Correct	3 ms	2764 KB	Output is correct
7	Correct	3 ms	2820 KB	Output is correct
8	Correct	5 ms	2952 KB	Output is correct
9	Correct	4 ms	2764 KB	Output is correct
10	Correct	39 ms	8556 KB	Output is correct
11	Correct	71 ms	9120 KB	Output is correct
12	Correct	115 ms	11588 KB	Output is correct
13	Correct	119 ms	12228 KB	Output is correct
14	Correct	84 ms	10460 KB	Output is correct
15	Correct	48 ms	7488 KB	Output is correct
16	Correct	60 ms	7460 KB	Output is correct

Subtask #4
31.0 / 31.0

#	결과	실행 시간	메모리	Grader output
1	Correct	3 ms	2636 KB	Output is correct
2	Correct	3 ms	2636 KB	Output is correct
3	Correct	2 ms	2636 KB	Output is correct
4	Correct	2 ms	2636 KB	Output is correct
5	Correct	2 ms	2592 KB	Output is correct
6	Correct	3 ms	2764 KB	Output is correct
7	Correct	3 ms	2820 KB	Output is correct
8	Correct	5 ms	2952 KB	Output is correct
9	Correct	4 ms	2764 KB	Output is correct
10	Correct	39 ms	8556 KB	Output is correct
11	Correct	71 ms	9120 KB	Output is correct
12	Correct	115 ms	11588 KB	Output is correct
13	Correct	119 ms	12228 KB	Output is correct
14	Correct	84 ms	10460 KB	Output is correct
15	Correct	48 ms	7488 KB	Output is correct
16	Correct	60 ms	7460 KB	Output is correct
17	Correct	74 ms	9268 KB	Output is correct
18	Correct	2 ms	2636 KB	Output is correct
19	Correct	2 ms	2636 KB	Output is correct
20	Correct	2 ms	2636 KB	Output is correct
21	Correct	2 ms	2636 KB	Output is correct
22	Correct	2 ms	2684 KB	Output is correct
23	Correct	3 ms	2892 KB	Output is correct
24	Correct	4 ms	2892 KB	Output is correct
25	Correct	6 ms	3012 KB	Output is correct
26	Correct	5 ms	2892 KB	Output is correct
27	Correct	37 ms	8568 KB	Output is correct
28	Correct	148 ms	11808 KB	Output is correct
29	Correct	124 ms	12524 KB	Output is correct
30	Correct	84 ms	10644 KB	Output is correct

Subtask #5
44.0 / 44.0

#	결과	실행 시간	메모리	Grader output
1	Correct	50 ms	7980 KB	Output is correct
2	Correct	2 ms	2636 KB	Output is correct
3	Correct	2 ms	2684 KB	Output is correct
4	Correct	2 ms	2636 KB	Output is correct
5	Correct	3 ms	2816 KB	Output is correct
6	Correct	3 ms	2764 KB	Output is correct
7	Correct	3 ms	2820 KB	Output is correct
8	Correct	37 ms	8840 KB	Output is correct
9	Correct	37 ms	8644 KB	Output is correct
10	Correct	8 ms	4940 KB	Output is correct
11	Correct	65 ms	7492 KB	Output is correct
12	Correct	2 ms	2636 KB	Output is correct
13	Correct	2 ms	2636 KB	Output is correct
14	Correct	2 ms	2636 KB	Output is correct
15	Correct	2 ms	2636 KB	Output is correct
16	Correct	2 ms	2636 KB	Output is correct
17	Correct	6 ms	2924 KB	Output is correct
18	Correct	6 ms	3020 KB	Output is correct
19	Correct	34 ms	7396 KB	Output is correct
20	Correct	122 ms	9356 KB	Output is correct
21	Correct	77 ms	7744 KB	Output is correct
22	Correct	57 ms	7532 KB	Output is correct
23	Correct	106 ms	9208 KB	Output is correct
24	Correct	60 ms	7104 KB	Output is correct
25	Correct	49 ms	6464 KB	Output is correct
26	Correct	46 ms	6456 KB	Output is correct
27	Correct	3 ms	2636 KB	Output is correct
28	Correct	3 ms	2636 KB	Output is correct
29	Correct	2 ms	2636 KB	Output is correct
30	Correct	2 ms	2636 KB	Output is correct
31	Correct	2 ms	2592 KB	Output is correct
32	Correct	3 ms	2764 KB	Output is correct
33	Correct	3 ms	2820 KB	Output is correct
34	Correct	5 ms	2952 KB	Output is correct
35	Correct	4 ms	2764 KB	Output is correct
36	Correct	39 ms	8556 KB	Output is correct
37	Correct	71 ms	9120 KB	Output is correct
38	Correct	115 ms	11588 KB	Output is correct
39	Correct	119 ms	12228 KB	Output is correct
40	Correct	84 ms	10460 KB	Output is correct
41	Correct	48 ms	7488 KB	Output is correct
42	Correct	60 ms	7460 KB	Output is correct
43	Correct	74 ms	9268 KB	Output is correct
44	Correct	2 ms	2636 KB	Output is correct
45	Correct	2 ms	2636 KB	Output is correct
46	Correct	2 ms	2636 KB	Output is correct
47	Correct	2 ms	2636 KB	Output is correct
48	Correct	2 ms	2684 KB	Output is correct
49	Correct	3 ms	2892 KB	Output is correct
50	Correct	4 ms	2892 KB	Output is correct
51	Correct	6 ms	3012 KB	Output is correct
52	Correct	5 ms	2892 KB	Output is correct
53	Correct	37 ms	8568 KB	Output is correct
54	Correct	148 ms	11808 KB	Output is correct
55	Correct	124 ms	12524 KB	Output is correct
56	Correct	84 ms	10644 KB	Output is correct
57	Correct	192 ms	13512 KB	Output is correct
58	Correct	43 ms	8828 KB	Output is correct
59	Correct	72 ms	9668 KB	Output is correct

답안 #435716

Compilation message

Subtask #1 7.0 / 7.0

Subtask #2 10.0 / 10.0

Subtask #3 8.0 / 8.0

Subtask #4 31.0 / 31.0

Subtask #5 44.0 / 44.0

Subtask #1
7.0 / 7.0

Subtask #2
10.0 / 10.0

Subtask #3
8.0 / 8.0

Subtask #4
31.0 / 31.0

Subtask #5
44.0 / 44.0