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Submission #415170

# Submission time Handle Problem Language Result Execution time Memory
415170 2021-05-31T15:35:22 Z Blagojce Toll (BOI17_toll) C++11
100 / 100
 422 ms 173824 KB 
#include <bits/stdc++.h>
#define fr(i, n, m) for(int i = (n); i < (m); i ++)
#define pb push_back
#define st first
#define nd second
#define pq priority_queue
#define all(x) begin(x), end(x)
  
using namespace std;
typedef long long ll;
typedef long double ld;
typedef pair<ll,ll> pii;
const ll inf = 1e18;
const int i_inf = 1e9;
const ll mod = 1e9+7;

mt19937 _rand(time(NULL));
const int mxn = 2e5;

int n, k, m, q;


vector<pii> g[mxn];


ll sparse[mxn][17][5][5];


ll aux[5][5];

void fillaux(int u, int p){
	fr(i, 0, k){
		fr(j, 0, k){
			aux[i][j] = inf;
		}
	}
	fr(i, 0, k){
		fr(j, 0, k){
			ll w = sparse[u][p][i][j];
			int pos = (u+(1<<p)-1)*k + j;
			
			for(auto v : g[pos]){
				int jp = v.st%k;
				aux[i][jp] = min(aux[i][jp], w + v.nd);
			}
		}
	}
}
void combine(int u, int p){
	int subu = u;
	int subv = u + (1<<p);
	
	fr(mid, 0, k){
		fr(i, 0, k){
			fr(j, 0, k){
				sparse[subu][p+1][i][j] = min(sparse[subu][p+1][i][j], aux[i][mid] + sparse[subv][p][mid][j]);	
			}
		}
	}
}


void update(int u, int p){
	if(u + (1<<p) > n) return;
	fillaux(u, p-1);
	combine(u, p-1);
}


ll dist[5];
ll dist2[5];
ll query(int a, int b){
	int S = a/k;
	int E = b/k;
	if(S == E) return -1;
	
	
	fr(i, 0, k) dist[i] = inf;
	dist[a%k] = 0;
	
	for(int p = 16; p >= 0; p --){
		while(S + (1<<p) <= E){
			
			fr(i, 0, k) dist2[i] = inf;
			fr(i, 0, k){
				fr(j, 0, k){
					ll w = sparse[S][p][i][j];
					
					int pos = (S+(1<<p)-1)*k + j;
					for(auto v : g[pos]){
						int jp = v.st%k;
						dist2[jp] = min(dist2[jp], dist[i] + w + v.nd);
					}
				}
			}
			fr(i, 0, k) dist[i] = dist2[i];
			S += (1<<p);
		}
	}
	
	if(dist[b%k] == inf) return -1;
	else return dist[b%k];
	
}


void solve(){
	cin >> k >> n >> m >> q;
	
	while(n % k != 0) ++n;
	
	fr(i, 0, m){ 
		int u, v, w;
		cin >> u >> v >> w;
		g[u].pb({v, w});
	}
	fr(u, 0, n/k){
		fr(p, 0, 17){
			fr(i, 0, k){
				fr(j, 0, k){
					sparse[u][p][i][j] = inf;
				}
			}
		}
	}
	fr(u, 0, n/k){
		fr(i, 0, k){
			sparse[u][0][i][i] = 0;
		}
	}
	fr(p, 1, 17){
		fr(u, 0, n/k){
			update(u, p);
		}
	}
	while(q--){
		int a, b;
		cin >> a >> b;
		cout<<query(a, b)<<endl;
	}
}
int main(){
	ios_base::sync_with_stdio(false);
	cin.tie(NULL);
	solve();
}

Subtask #1
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 215 ms 172984 KB Output is correct
2 Correct 5 ms 4940 KB Output is correct
3 Correct 4 ms 4940 KB Output is correct
4 Correct 4 ms 4940 KB Output is correct
5 Correct 9 ms 8268 KB Output is correct
6 Correct 8 ms 8260 KB Output is correct
7 Correct 11 ms 8268 KB Output is correct
8 Correct 187 ms 172908 KB Output is correct
9 Correct 171 ms 172740 KB Output is correct
10 Correct 135 ms 171396 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 311 ms 90692 KB Output is correct
2 Correct 4 ms 4940 KB Output is correct
3 Correct 3 ms 4940 KB Output is correct
4 Correct 4 ms 4940 KB Output is correct
5 Correct 4 ms 4940 KB Output is correct
6 Correct 4 ms 4940 KB Output is correct
7 Correct 28 ms 8392 KB Output is correct
8 Correct 30 ms 6860 KB Output is correct
9 Correct 179 ms 172900 KB Output is correct
10 Correct 363 ms 64596 KB Output is correct
11 Correct 302 ms 91048 KB Output is correct
12 Correct 266 ms 62612 KB Output is correct
13 Correct 276 ms 29652 KB Output is correct
14 Correct 190 ms 40912 KB Output is correct
15 Correct 175 ms 27048 KB Output is correct
16 Correct 177 ms 27036 KB Output is correct

Subtask #3
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 4940 KB Output is correct
2 Correct 4 ms 4940 KB Output is correct
3 Correct 5 ms 4940 KB Output is correct
4 Correct 3 ms 4940 KB Output is correct
5 Correct 5 ms 4940 KB Output is correct
6 Correct 9 ms 8268 KB Output is correct
7 Correct 6 ms 6660 KB Output is correct
8 Correct 12 ms 5836 KB Output is correct
9 Correct 10 ms 5944 KB Output is correct
10 Correct 143 ms 172864 KB Output is correct
11 Correct 207 ms 90756 KB Output is correct
12 Correct 253 ms 64436 KB Output is correct
13 Correct 281 ms 64956 KB Output is correct
14 Correct 213 ms 63688 KB Output is correct
15 Correct 141 ms 26996 KB Output is correct
16 Correct 147 ms 26952 KB Output is correct

Subtask #4
31.0 / 31.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 4940 KB Output is correct
2 Correct 4 ms 4940 KB Output is correct
3 Correct 5 ms 4940 KB Output is correct
4 Correct 3 ms 4940 KB Output is correct
5 Correct 5 ms 4940 KB Output is correct
6 Correct 9 ms 8268 KB Output is correct
7 Correct 6 ms 6660 KB Output is correct
8 Correct 12 ms 5836 KB Output is correct
9 Correct 10 ms 5944 KB Output is correct
10 Correct 143 ms 172864 KB Output is correct
11 Correct 207 ms 90756 KB Output is correct
12 Correct 253 ms 64436 KB Output is correct
13 Correct 281 ms 64956 KB Output is correct
14 Correct 213 ms 63688 KB Output is correct
15 Correct 141 ms 26996 KB Output is correct
16 Correct 147 ms 26952 KB Output is correct
17 Correct 215 ms 90688 KB Output is correct
18 Correct 4 ms 4940 KB Output is correct
19 Correct 4 ms 4940 KB Output is correct
20 Correct 4 ms 4940 KB Output is correct
21 Correct 4 ms 4940 KB Output is correct
22 Correct 4 ms 4940 KB Output is correct
23 Correct 12 ms 8268 KB Output is correct
24 Correct 13 ms 6732 KB Output is correct
25 Correct 29 ms 5708 KB Output is correct
26 Correct 19 ms 5964 KB Output is correct
27 Correct 185 ms 172904 KB Output is correct
28 Correct 335 ms 64516 KB Output is correct
29 Correct 354 ms 64988 KB Output is correct
30 Correct 290 ms 63712 KB Output is correct

Subtask #5
44.0 / 44.0

# Verdict Execution time Memory Grader output
1 Correct 215 ms 172984 KB Output is correct
2 Correct 5 ms 4940 KB Output is correct
3 Correct 4 ms 4940 KB Output is correct
4 Correct 4 ms 4940 KB Output is correct
5 Correct 9 ms 8268 KB Output is correct
6 Correct 8 ms 8260 KB Output is correct
7 Correct 11 ms 8268 KB Output is correct
8 Correct 187 ms 172908 KB Output is correct
9 Correct 171 ms 172740 KB Output is correct
10 Correct 135 ms 171396 KB Output is correct
11 Correct 311 ms 90692 KB Output is correct
12 Correct 4 ms 4940 KB Output is correct
13 Correct 3 ms 4940 KB Output is correct
14 Correct 4 ms 4940 KB Output is correct
15 Correct 4 ms 4940 KB Output is correct
16 Correct 4 ms 4940 KB Output is correct
17 Correct 28 ms 8392 KB Output is correct
18 Correct 30 ms 6860 KB Output is correct
19 Correct 179 ms 172900 KB Output is correct
20 Correct 363 ms 64596 KB Output is correct
21 Correct 302 ms 91048 KB Output is correct
22 Correct 266 ms 62612 KB Output is correct
23 Correct 276 ms 29652 KB Output is correct
24 Correct 190 ms 40912 KB Output is correct
25 Correct 175 ms 27048 KB Output is correct
26 Correct 177 ms 27036 KB Output is correct
27 Correct 4 ms 4940 KB Output is correct
28 Correct 4 ms 4940 KB Output is correct
29 Correct 5 ms 4940 KB Output is correct
30 Correct 3 ms 4940 KB Output is correct
31 Correct 5 ms 4940 KB Output is correct
32 Correct 9 ms 8268 KB Output is correct
33 Correct 6 ms 6660 KB Output is correct
34 Correct 12 ms 5836 KB Output is correct
35 Correct 10 ms 5944 KB Output is correct
36 Correct 143 ms 172864 KB Output is correct
37 Correct 207 ms 90756 KB Output is correct
38 Correct 253 ms 64436 KB Output is correct
39 Correct 281 ms 64956 KB Output is correct
40 Correct 213 ms 63688 KB Output is correct
41 Correct 141 ms 26996 KB Output is correct
42 Correct 147 ms 26952 KB Output is correct
43 Correct 215 ms 90688 KB Output is correct
44 Correct 4 ms 4940 KB Output is correct
45 Correct 4 ms 4940 KB Output is correct
46 Correct 4 ms 4940 KB Output is correct
47 Correct 4 ms 4940 KB Output is correct
48 Correct 4 ms 4940 KB Output is correct
49 Correct 12 ms 8268 KB Output is correct
50 Correct 13 ms 6732 KB Output is correct
51 Correct 29 ms 5708 KB Output is correct
52 Correct 19 ms 5964 KB Output is correct
53 Correct 185 ms 172904 KB Output is correct
54 Correct 335 ms 64516 KB Output is correct
55 Correct 354 ms 64988 KB Output is correct
56 Correct 290 ms 63712 KB Output is correct
57 Correct 422 ms 51060 KB Output is correct
58 Correct 192 ms 173824 KB Output is correct
59 Correct 332 ms 92632 KB Output is correct