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Submission #472609

# Submission time Handle Problem Language Result Execution time Memory
472609 2021-09-13T19:34:31 Z disastah Toll (BOI17_toll) C++17
100 / 100
 188 ms 39264 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=5e4;

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

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 52 ms 39236 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 3 ms 3148 KB Output is correct
6 Correct 3 ms 3148 KB Output is correct
7 Correct 3 ms 3148 KB Output is correct
8 Correct 52 ms 39200 KB Output is correct
9 Correct 50 ms 39008 KB Output is correct
10 Correct 22 ms 36132 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 81 ms 37272 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 5 ms 3276 KB Output is correct
8 Correct 6 ms 3276 KB Output is correct
9 Correct 52 ms 39264 KB Output is correct
10 Correct 127 ms 38392 KB Output is correct
11 Correct 91 ms 37316 KB Output is correct
12 Correct 84 ms 36340 KB Output is correct
13 Correct 133 ms 24644 KB Output is correct
14 Correct 73 ms 23720 KB Output is correct
15 Correct 80 ms 22084 KB Output is correct
16 Correct 76 ms 21960 KB Output is correct

Subtask #3
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 2636 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 3 ms 2636 KB Output is correct
6 Correct 3 ms 3148 KB Output is correct
7 Correct 3 ms 3148 KB Output is correct
8 Correct 6 ms 3276 KB Output is correct
9 Correct 4 ms 3148 KB Output is correct
10 Correct 48 ms 39140 KB Output is correct
11 Correct 79 ms 37188 KB Output is correct
12 Correct 151 ms 38208 KB Output is correct
13 Correct 128 ms 38724 KB Output is correct
14 Correct 104 ms 37572 KB Output is correct
15 Correct 74 ms 21832 KB Output is correct
16 Correct 74 ms 21792 KB Output is correct

Subtask #4
31.0 / 31.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 2636 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 3 ms 2636 KB Output is correct
6 Correct 3 ms 3148 KB Output is correct
7 Correct 3 ms 3148 KB Output is correct
8 Correct 6 ms 3276 KB Output is correct
9 Correct 4 ms 3148 KB Output is correct
10 Correct 48 ms 39140 KB Output is correct
11 Correct 79 ms 37188 KB Output is correct
12 Correct 151 ms 38208 KB Output is correct
13 Correct 128 ms 38724 KB Output is correct
14 Correct 104 ms 37572 KB Output is correct
15 Correct 74 ms 21832 KB Output is correct
16 Correct 74 ms 21792 KB Output is correct
17 Correct 79 ms 37264 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 2636 KB Output is correct
23 Correct 3 ms 3148 KB Output is correct
24 Correct 4 ms 3148 KB Output is correct
25 Correct 7 ms 3148 KB Output is correct
26 Correct 5 ms 3148 KB Output is correct
27 Correct 51 ms 39176 KB Output is correct
28 Correct 129 ms 38316 KB Output is correct
29 Correct 130 ms 38732 KB Output is correct
30 Correct 103 ms 37572 KB Output is correct

Subtask #5
44.0 / 44.0

# Verdict Execution time Memory Grader output
1 Correct 52 ms 39236 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 3 ms 3148 KB Output is correct
6 Correct 3 ms 3148 KB Output is correct
7 Correct 3 ms 3148 KB Output is correct
8 Correct 52 ms 39200 KB Output is correct
9 Correct 50 ms 39008 KB Output is correct
10 Correct 22 ms 36132 KB Output is correct
11 Correct 81 ms 37272 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 5 ms 3276 KB Output is correct
18 Correct 6 ms 3276 KB Output is correct
19 Correct 52 ms 39264 KB Output is correct
20 Correct 127 ms 38392 KB Output is correct
21 Correct 91 ms 37316 KB Output is correct
22 Correct 84 ms 36340 KB Output is correct
23 Correct 133 ms 24644 KB Output is correct
24 Correct 73 ms 23720 KB Output is correct
25 Correct 80 ms 22084 KB Output is correct
26 Correct 76 ms 21960 KB Output is correct
27 Correct 2 ms 2636 KB Output is correct
28 Correct 2 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 3 ms 2636 KB Output is correct
32 Correct 3 ms 3148 KB Output is correct
33 Correct 3 ms 3148 KB Output is correct
34 Correct 6 ms 3276 KB Output is correct
35 Correct 4 ms 3148 KB Output is correct
36 Correct 48 ms 39140 KB Output is correct
37 Correct 79 ms 37188 KB Output is correct
38 Correct 151 ms 38208 KB Output is correct
39 Correct 128 ms 38724 KB Output is correct
40 Correct 104 ms 37572 KB Output is correct
41 Correct 74 ms 21832 KB Output is correct
42 Correct 74 ms 21792 KB Output is correct
43 Correct 79 ms 37264 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 2636 KB Output is correct
49 Correct 3 ms 3148 KB Output is correct
50 Correct 4 ms 3148 KB Output is correct
51 Correct 7 ms 3148 KB Output is correct
52 Correct 5 ms 3148 KB Output is correct
53 Correct 51 ms 39176 KB Output is correct
54 Correct 129 ms 38316 KB Output is correct
55 Correct 130 ms 38732 KB Output is correct
56 Correct 103 ms 37572 KB Output is correct
57 Correct 188 ms 37572 KB Output is correct
58 Correct 57 ms 39236 KB Output is correct
59 Correct 91 ms 37344 KB Output is correct