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Submission #472607

# Submission time Handle Problem Language Result Execution time Memory
472607 2021-09-13T19:26:39 Z disastah Toll (BOI17_toll) C++17
100 / 100
 198 ms 62248 KB 
#pragma GCC optimize("O3")
#include <bits/stdc++.h>
#define ar array
using namespace std;
typedef long double ld;
typedef long long ll;
const int inf=2e9+9;
const ll linf=4e18+18;
const int N=5e5;

int k, n, m, q;
vector<ar<int,2>> g[N], rg[N];
ll dst[20][N][5]; int dst_mask[N];

void build_dst(int h, int l, int r) {
	int m=(l+r)/2;
	for (int i=m*k; i<r*k; ++i) dst_mask[i]^=(1<<h);
	for (int k0=0; k0<k; ++k0) {
		dst[h][m*k+k0][k0]=0;
		for (int i=m*k+k0-1; i>=l*k; --i) {
			dst[h][i][k0]=inf;
			for (auto &[u,t] : g[i]) {
				if (u>m*k+k0) continue;
				dst[h][i][k0]=min(dst[h][i][k0],dst[h][u][k0]+t);
			}
		}
		for (int i=m*k+k0+1; i<r*k; ++i) {
			dst[h][i][k0]=inf;
			for (auto &[u,t] : rg[i]) {
				if (u<m*k+k0) continue;
				dst[h][i][k0]=min(dst[h][i][k0],dst[h][u][k0]+t);
			}
		}
	}
	if (l+1<r) {
		build_dst(h+1,l,m);
		build_dst(h+1,m,r);
	}
}

void solve() {
	cin >> k >> n >> m >> q;
	for (int i=0; i<m; ++i) {
		int a, b, t; cin >> a >> b >> t;
		g[a].push_back({b,t});
		rg[b].push_back({a,t});
	}
	build_dst(0,0,(n+k-1)/k);
	while(q--) {
		int a, b; cin >> a >> b;
		if (a/k==b/k) {
			cout << "-1\n";
			continue;
		}
		int h=__builtin_ctz(dst_mask[a]^dst_mask[b]);
		ll ans=inf;
		for (int i=0; i<k; ++i) ans=min(ans,dst[h][a][i]+dst[h][b][i]);
		cout << (ans<inf?ans:-1) << "\n";
	}
}

signed main() {
	ios_base::sync_with_stdio(0);
	cin.tie(0); cout.tie(0);
#ifdef disastah
	cout << "Output\n\n";
#endif
	int tt=1;
//	cin >> tt;
	while (tt--) {
		solve();
		cout << "\n";
	}
}

Subtask #1
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 69 ms 60520 KB Output is correct
2 Correct 15 ms 23844 KB Output is correct
3 Correct 15 ms 23744 KB Output is correct
4 Correct 15 ms 23840 KB Output is correct
5 Correct 15 ms 24268 KB Output is correct
6 Correct 16 ms 24280 KB Output is correct
7 Correct 16 ms 24396 KB Output is correct
8 Correct 67 ms 60540 KB Output is correct
9 Correct 68 ms 60392 KB Output is correct
10 Correct 35 ms 57436 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 101 ms 58536 KB Output is correct
2 Correct 14 ms 23848 KB Output is correct
3 Correct 15 ms 23820 KB Output is correct
4 Correct 15 ms 23724 KB Output is correct
5 Correct 15 ms 23828 KB Output is correct
6 Correct 15 ms 23756 KB Output is correct
7 Correct 19 ms 24396 KB Output is correct
8 Correct 19 ms 24396 KB Output is correct
9 Correct 69 ms 60420 KB Output is correct
10 Correct 162 ms 59552 KB Output is correct
11 Correct 97 ms 58564 KB Output is correct
12 Correct 111 ms 57572 KB Output is correct
13 Correct 143 ms 45844 KB Output is correct
14 Correct 85 ms 44864 KB Output is correct
15 Correct 89 ms 43060 KB Output is correct
16 Correct 88 ms 42980 KB Output is correct

Subtask #3
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 14 ms 23756 KB Output is correct
2 Correct 15 ms 23840 KB Output is correct
3 Correct 14 ms 23828 KB Output is correct
4 Correct 14 ms 23800 KB Output is correct
5 Correct 15 ms 23736 KB Output is correct
6 Correct 16 ms 24268 KB Output is correct
7 Correct 16 ms 24352 KB Output is correct
8 Correct 17 ms 24380 KB Output is correct
9 Correct 20 ms 24268 KB Output is correct
10 Correct 65 ms 60508 KB Output is correct
11 Correct 90 ms 58484 KB Output is correct
12 Correct 144 ms 59480 KB Output is correct
13 Correct 161 ms 59972 KB Output is correct
14 Correct 121 ms 58736 KB Output is correct
15 Correct 90 ms 43068 KB Output is correct
16 Correct 92 ms 43112 KB Output is correct

Subtask #4
31.0 / 31.0

# Verdict Execution time Memory Grader output
1 Correct 14 ms 23756 KB Output is correct
2 Correct 15 ms 23840 KB Output is correct
3 Correct 14 ms 23828 KB Output is correct
4 Correct 14 ms 23800 KB Output is correct
5 Correct 15 ms 23736 KB Output is correct
6 Correct 16 ms 24268 KB Output is correct
7 Correct 16 ms 24352 KB Output is correct
8 Correct 17 ms 24380 KB Output is correct
9 Correct 20 ms 24268 KB Output is correct
10 Correct 65 ms 60508 KB Output is correct
11 Correct 90 ms 58484 KB Output is correct
12 Correct 144 ms 59480 KB Output is correct
13 Correct 161 ms 59972 KB Output is correct
14 Correct 121 ms 58736 KB Output is correct
15 Correct 90 ms 43068 KB Output is correct
16 Correct 92 ms 43112 KB Output is correct
17 Correct 92 ms 58488 KB Output is correct
18 Correct 14 ms 23756 KB Output is correct
19 Correct 14 ms 23756 KB Output is correct
20 Correct 14 ms 23768 KB Output is correct
21 Correct 15 ms 23716 KB Output is correct
22 Correct 14 ms 23828 KB Output is correct
23 Correct 17 ms 24340 KB Output is correct
24 Correct 18 ms 24296 KB Output is correct
25 Correct 18 ms 24304 KB Output is correct
26 Correct 18 ms 24288 KB Output is correct
27 Correct 85 ms 60484 KB Output is correct
28 Correct 141 ms 59544 KB Output is correct
29 Correct 160 ms 60020 KB Output is correct
30 Correct 141 ms 58796 KB Output is correct

Subtask #5
44.0 / 44.0

# Verdict Execution time Memory Grader output
1 Correct 69 ms 60520 KB Output is correct
2 Correct 15 ms 23844 KB Output is correct
3 Correct 15 ms 23744 KB Output is correct
4 Correct 15 ms 23840 KB Output is correct
5 Correct 15 ms 24268 KB Output is correct
6 Correct 16 ms 24280 KB Output is correct
7 Correct 16 ms 24396 KB Output is correct
8 Correct 67 ms 60540 KB Output is correct
9 Correct 68 ms 60392 KB Output is correct
10 Correct 35 ms 57436 KB Output is correct
11 Correct 101 ms 58536 KB Output is correct
12 Correct 14 ms 23848 KB Output is correct
13 Correct 15 ms 23820 KB Output is correct
14 Correct 15 ms 23724 KB Output is correct
15 Correct 15 ms 23828 KB Output is correct
16 Correct 15 ms 23756 KB Output is correct
17 Correct 19 ms 24396 KB Output is correct
18 Correct 19 ms 24396 KB Output is correct
19 Correct 69 ms 60420 KB Output is correct
20 Correct 162 ms 59552 KB Output is correct
21 Correct 97 ms 58564 KB Output is correct
22 Correct 111 ms 57572 KB Output is correct
23 Correct 143 ms 45844 KB Output is correct
24 Correct 85 ms 44864 KB Output is correct
25 Correct 89 ms 43060 KB Output is correct
26 Correct 88 ms 42980 KB Output is correct
27 Correct 14 ms 23756 KB Output is correct
28 Correct 15 ms 23840 KB Output is correct
29 Correct 14 ms 23828 KB Output is correct
30 Correct 14 ms 23800 KB Output is correct
31 Correct 15 ms 23736 KB Output is correct
32 Correct 16 ms 24268 KB Output is correct
33 Correct 16 ms 24352 KB Output is correct
34 Correct 17 ms 24380 KB Output is correct
35 Correct 20 ms 24268 KB Output is correct
36 Correct 65 ms 60508 KB Output is correct
37 Correct 90 ms 58484 KB Output is correct
38 Correct 144 ms 59480 KB Output is correct
39 Correct 161 ms 59972 KB Output is correct
40 Correct 121 ms 58736 KB Output is correct
41 Correct 90 ms 43068 KB Output is correct
42 Correct 92 ms 43112 KB Output is correct
43 Correct 92 ms 58488 KB Output is correct
44 Correct 14 ms 23756 KB Output is correct
45 Correct 14 ms 23756 KB Output is correct
46 Correct 14 ms 23768 KB Output is correct
47 Correct 15 ms 23716 KB Output is correct
48 Correct 14 ms 23828 KB Output is correct
49 Correct 17 ms 24340 KB Output is correct
50 Correct 18 ms 24296 KB Output is correct
51 Correct 18 ms 24304 KB Output is correct
52 Correct 18 ms 24288 KB Output is correct
53 Correct 85 ms 60484 KB Output is correct
54 Correct 141 ms 59544 KB Output is correct
55 Correct 160 ms 60020 KB Output is correct
56 Correct 141 ms 58796 KB Output is correct
57 Correct 198 ms 62248 KB Output is correct
58 Correct 69 ms 61356 KB Output is correct
59 Correct 97 ms 60248 KB Output is correct