oj.uz

Submission #197143

# Submission time Handle Problem Language Result Execution time Memory
197143 2020-01-19T09:33:48 Z arnold518 Toll (BOI17_toll) C++14
39 / 100
 3000 ms 79212 KB 
#include <bits/stdc++.h>
using namespace std;

typedef long long ll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;

const int MAXN = 5e5;
const ll INF = 1e15;

int K, N, M, Q;
vector<pii> adj[MAXN+10];

struct Node
{
	vector<vector<ll>> V;
	Node() { V=vector<vector<ll>>(K, vector<ll>(K, INF)); }
};
Node Z;

Node operator + (const Node &p, const Node &q)
{
	Node ret=Node();
	int i, j, k;
	for(i=0; i<K; i++)
	{
		for(j=0; j<K; j++)
		{
			ll val=INF;
			for(k=0; k<K; k++) val=min(val, p.V[i][k]+q.V[k][j]);
			ret.V[i][j]=val;
		}
	}
	return ret;
}

Node tree[MAXN*4+10];

void init(int node, int tl, int tr)
{
	if(tl==tr)
	{
		int i, j;
		tree[node]=Node();
		for(i=(tl-1)*K; i<tl*K; i++) for(auto nxt : adj[i]) tree[node].V[i%K][nxt.first%K]=nxt.second;
		//printf("%d %d : \n", tl, tr);
		//for(i=0; i<K; i++) { for(j=0; j<K; j++) printf("%lld ", tree[node].V[i][j]); printf("\n"); }
		return;
	}
	int mid=tl+tr>>1;
	init(node*2, tl, mid);
	init(node*2+1, mid+1, tr);
	tree[node]=tree[node*2]+tree[node*2+1];
	//int i, j;
	//printf("%d %d : \n", tl, tr);
	//for(i=0; i<K; i++) { for(j=0; j<K; j++) printf("%lld ", tree[node].V[i][j]); printf("\n"); }
}

Node query(int node, int tl, int tr, int l, int r)
{
	if(l<=tl && tr<=r) return tree[node];
	if(tr<l || r<tl) return Z;
	int mid=tl+tr>>1;
	return query(node*2, tl, mid, l, r)+query(node*2+1, mid+1, tr, l, r);
}

Node nodes[MAXN+10];
ll dp[MAXN+10];

int main()
{
	int i, j, k;
	scanf("%d%d%d%d", &K, &N, &M, &Q);
	if(N%K) N=N/K*K+K;

	Z=Node();
	for(i=0; i<K; i++) Z.V[i][i]=0;

	for(i=1; i<=M; i++)
	{
		int u, v, w;
		scanf("%d%d%d", &u, &v, &w);
		adj[u].push_back({v, w});
	}

	for(k=1; k<N/K; k++)
	{
		nodes[k]=Node();
		for(i=(k-1)*K; i<k*K; i++) for(auto nxt : adj[i]) nodes[k].V[i%K][nxt.first%K]=nxt.second;
	}

	//init(1, 1, N/K-1);
	while(Q--)
	{
		int a, b;
		scanf("%d%d", &a, &b);

		for(i=0; i<N; i++) dp[i]=INF;
		dp[a]=0;

		for(i=a; i<=b; i++) for(auto nxt : adj[i]) dp[nxt.first]=min(dp[nxt.first], dp[i]+nxt.second);

		/*
		if(a/K==b/K) { printf("-1"); continue; }
		//Node t=query(1, 1, N/K-1, a/K+1, b/K);
		Node t=nodes[a/K+1];
		for(i=a/K+2; i<=b/K; i++) t=t+nodes[i];
		ll ans=t.V[a%K][b%K];
		if(ans>=INF) ans=-1;
		*/
		if(dp[b]==INF) dp[b]=-1;
		printf("%lld\n", dp[b]);
	}
}

Compilation message

toll.cpp: In function 'void init(int, int, int)':
toll.cpp:43:10: warning: unused variable 'j' [-Wunused-variable]
   int i, j;
          ^
toll.cpp:50:12: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  int mid=tl+tr>>1;
          ~~^~~
toll.cpp: In function 'Node query(int, int, int, int, int)':
toll.cpp:63:12: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  int mid=tl+tr>>1;
          ~~^~~
toll.cpp: In function 'int main()':
toll.cpp:72:9: warning: unused variable 'j' [-Wunused-variable]
  int i, j, k;
         ^
toll.cpp:73:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d%d%d", &K, &N, &M, &Q);
  ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~
toll.cpp:82:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d%d%d", &u, &v, &w);
   ~~~~~^~~~~~~~~~~~~~~~~~~~~~
toll.cpp:96:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d%d", &a, &b);
   ~~~~~^~~~~~~~~~~~~~~~

Subtask #1
0 / 7.0

# Verdict Execution time Memory Grader output
1 Execution timed out 3011 ms 76152 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Execution timed out 3097 ms 76188 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #3
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 74 ms 70776 KB Output is correct
2 Correct 76 ms 70840 KB Output is correct
3 Correct 81 ms 70916 KB Output is correct
4 Correct 80 ms 70908 KB Output is correct
5 Correct 77 ms 70876 KB Output is correct
6 Correct 76 ms 70904 KB Output is correct
7 Correct 78 ms 70944 KB Output is correct
8 Correct 85 ms 71024 KB Output is correct
9 Correct 83 ms 71032 KB Output is correct
10 Correct 229 ms 76764 KB Output is correct
11 Correct 211 ms 77560 KB Output is correct
12 Correct 263 ms 78420 KB Output is correct
13 Correct 322 ms 79024 KB Output is correct
14 Correct 263 ms 77688 KB Output is correct
15 Correct 158 ms 75752 KB Output is correct
16 Correct 149 ms 75768 KB Output is correct

Subtask #4
31.0 / 31.0

# Verdict Execution time Memory Grader output
1 Correct 74 ms 70776 KB Output is correct
2 Correct 76 ms 70840 KB Output is correct
3 Correct 81 ms 70916 KB Output is correct
4 Correct 80 ms 70908 KB Output is correct
5 Correct 77 ms 70876 KB Output is correct
6 Correct 76 ms 70904 KB Output is correct
7 Correct 78 ms 70944 KB Output is correct
8 Correct 85 ms 71024 KB Output is correct
9 Correct 83 ms 71032 KB Output is correct
10 Correct 229 ms 76764 KB Output is correct
11 Correct 211 ms 77560 KB Output is correct
12 Correct 263 ms 78420 KB Output is correct
13 Correct 322 ms 79024 KB Output is correct
14 Correct 263 ms 77688 KB Output is correct
15 Correct 158 ms 75752 KB Output is correct
16 Correct 149 ms 75768 KB Output is correct
17 Correct 1624 ms 77736 KB Output is correct
18 Correct 77 ms 70780 KB Output is correct
19 Correct 88 ms 70776 KB Output is correct
20 Correct 77 ms 70904 KB Output is correct
21 Correct 72 ms 70776 KB Output is correct
22 Correct 78 ms 70648 KB Output is correct
23 Correct 100 ms 70968 KB Output is correct
24 Correct 103 ms 71032 KB Output is correct
25 Correct 114 ms 71072 KB Output is correct
26 Correct 108 ms 71032 KB Output is correct
27 Correct 1845 ms 76896 KB Output is correct
28 Correct 1999 ms 78804 KB Output is correct
29 Correct 2353 ms 79212 KB Output is correct
30 Correct 1813 ms 77860 KB Output is correct

Subtask #5
0 / 44.0

# Verdict Execution time Memory Grader output
1 Execution timed out 3011 ms 76152 KB Time limit exceeded
2 Halted 0 ms 0 KB -