oj.uz

Submission #243916

# Submission time Handle Problem Language Result Execution time Memory
243916 2020-07-02T07:17:54 Z arnold518 Wild Boar (JOI18_wild_boar) C++14
47 / 100
 1151 ms 1048580 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 = 4000;
const int MAXL = 1e5;
const ll INF = 4e18;

struct Edge
{
	int u, v, w, p;
};

int N, M, T, L;
vector<Edge> adj[MAXN+10], radj[MAXN+10];
Edge E[MAXN+10];
ll dist[MAXN+10][MAXN+10];
int A[MAXL+10];

struct Queue
{
	int v; ll w;
	bool operator < (const Queue &p) const { return w>p.w; }
};

struct Node
{
	int l, r; ll w;
	Node() : l(0), r(0), w(INF) {}
	Node(int l, int r, ll w) : l(l), r(r), w(w) {}
	bool operator < (const Node &p) const { return w<p.w; }
};

Node dist2[MAXN+10][MAXN+10][4];
Node tree[MAXL*4+10][4];

void add(int node)
{
	int i, j, k;
	for(i=0; i<4; i++) tree[node][i]=Node();

	vector<Node> V;
	for(i=0; i<4; i++) for(j=0; j<4; j++) if(tree[node*2][i].r!=tree[node*2+1][j].l) V.push_back({tree[node*2][i].l, tree[node*2+1][j].r, tree[node*2][i].w+tree[node*2+1][j].w});

	for(i=0; i<V.size(); i++) tree[node][0]=min(tree[node][0], V[i]);
	for(i=0; i<V.size(); i++) if(V[i].l!=tree[node][0].l && V[i].r!=tree[node][0].r) tree[node][1]=min(tree[node][1], V[i]);
	for(i=0; i<V.size(); i++) if(V[i].l!=tree[node][0].l && V[i].r!=tree[node][1].r) tree[node][2]=min(tree[node][2], V[i]);
	for(i=0; i<V.size(); i++) if(V[i].l!=tree[node][1].l && V[i].r!=tree[node][0].r) tree[node][3]=min(tree[node][3], V[i]);
}

void init(int node, int tl, int tr)
{
	if(tl==tr)
	{
		int i, j;
		for(i=0; i<4; i++) tree[node][i]=dist2[A[tl]][A[tl+1]][i];
		return;
	}
	int mid=tl+tr>>1;
	init(node*2, tl, mid);
	init(node*2+1, mid+1, tr);
	add(node);
}

void update(int node, int tl, int tr, int p)
{
	if(tr<p-1 || p<tl) return;
	if(tl==tr)
	{
		int i, j;
		for(i=0; i<4; i++) tree[node][i]=dist2[A[tl]][A[tl+1]][i];
		return;
	}
	int mid=tl+tr>>1;
	update(node*2, tl, mid, p);
	update(node*2+1, mid+1, tr, p);
	add(node);
}

int main()
{
	int i, j, k;
	scanf("%d%d%d%d", &N, &M, &T, &L);
	for(i=1; i<=M; i++)
	{
		int u, v, w;
		scanf("%d%d%d", &u, &v, &w);
		adj[u].push_back({u, v, w, i*2-1}); radj[v].push_back({u, v, w, i*2-1});
		adj[v].push_back({v, u, w, i*2}); radj[u].push_back({v, u, w, i*2});
		E[i*2-1]={u, v, w, i*2-1};
		E[i*2]={v, u, w, i*2};
	}
	for(i=1; i<=N; i++) sort(adj[i].begin(), adj[i].end(), [&](const Edge &p, const Edge &q) { return p.v<q.v; });

	for(i=1; i<=2*M; i++)
	{
		for(j=1; j<=2*M; j++) dist[i][j]=INF;

		priority_queue<Queue> PQ;
		PQ.push({i, E[i].w}); dist[i][i]=E[i].w;
		while(!PQ.empty())
		{
			Queue now=PQ.top(); PQ.pop();
			if(dist[i][now.v]!=now.w) continue;
			for(auto nxt : adj[E[now.v].v]) if(nxt.v!=E[now.v].u && dist[i][nxt.p]>now.w+nxt.w)
			{
				dist[i][nxt.p]=now.w+nxt.w;
				PQ.push({nxt.p, now.w+nxt.w});
			}
		}
	}

	for(i=1; i<=N; i++)
	{
		for(j=1; j<=N; j++)
		{
			vector<Node> V;
			for(k=0; k<4; k++) dist2[i][j][k]=Node();
			for(auto it : adj[i]) for(auto jt : radj[j]) V.push_back(Node(it.v, jt.u, dist[it.p][jt.p]));

			for(k=0; k<V.size(); k++) dist2[i][j][0]=min(dist2[i][j][0], V[k]);
			for(k=0; k<V.size(); k++) if(V[k].l!=dist2[i][j][0].l && V[k].r!=dist2[i][j][0].r) dist2[i][j][1]=min(dist2[i][j][1], V[k]);
			for(k=0; k<V.size(); k++) if(V[k].l!=dist2[i][j][0].l && V[k].r!=dist2[i][j][1].r) dist2[i][j][2]=min(dist2[i][j][2], V[k]);
			for(k=0; k<V.size(); k++) if(V[k].l!=dist2[i][j][1].l && V[k].r!=dist2[i][j][0].r) dist2[i][j][3]=min(dist2[i][j][3], V[k]);
		}
	}

	//for(i=1; i<=2*M; i++) { for(j=1; j<=2*M; j++) printf("%lld ", dist[i][j]); printf("\n"); }

	//for(i=1; i<=N; i++) { for(j=1; j<=N; j++) { for(k=0; k<4; k++) printf("%lld ", dist2[i][j][k].w); printf(" / "); } printf("\n"); }

	for(i=1; i<=L; i++) scanf("%d", &A[i]);
	init(1, 1, L-1);

	while(T--)
	{
		int p, q;
		scanf("%d%d", &p, &q); A[p]=q;
		update(1, 1, L-1, p);
		if(tree[1][0].w==INF) printf("-1\n");
		else printf("%lld\n", tree[1][0].w);
	}
}

Compilation message

wild_boar.cpp: In function 'void add(int)':
wild_boar.cpp:48:12: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(i=0; i<V.size(); i++) tree[node][0]=min(tree[node][0], V[i]);
           ~^~~~~~~~~
wild_boar.cpp:49:12: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(i=0; i<V.size(); i++) if(V[i].l!=tree[node][0].l && V[i].r!=tree[node][0].r) tree[node][1]=min(tree[node][1], V[i]);
           ~^~~~~~~~~
wild_boar.cpp:50:12: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(i=0; i<V.size(); i++) if(V[i].l!=tree[node][0].l && V[i].r!=tree[node][1].r) tree[node][2]=min(tree[node][2], V[i]);
           ~^~~~~~~~~
wild_boar.cpp:51:12: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(i=0; i<V.size(); i++) if(V[i].l!=tree[node][1].l && V[i].r!=tree[node][0].r) tree[node][3]=min(tree[node][3], V[i]);
           ~^~~~~~~~~
wild_boar.cpp:42:12: warning: unused variable 'k' [-Wunused-variable]
  int i, j, k;
            ^
wild_boar.cpp: In function 'void init(int, int, int)':
wild_boar.cpp:58:10: warning: unused variable 'j' [-Wunused-variable]
   int i, j;
          ^
wild_boar.cpp:62:12: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  int mid=tl+tr>>1;
          ~~^~~
wild_boar.cpp: In function 'void update(int, int, int, int)':
wild_boar.cpp:73:10: warning: unused variable 'j' [-Wunused-variable]
   int i, j;
          ^
wild_boar.cpp:77:12: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  int mid=tl+tr>>1;
          ~~^~~
wild_boar.cpp: In function 'int main()':
wild_boar.cpp:124:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    for(k=0; k<V.size(); k++) dist2[i][j][0]=min(dist2[i][j][0], V[k]);
             ~^~~~~~~~~
wild_boar.cpp:125:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    for(k=0; k<V.size(); k++) if(V[k].l!=dist2[i][j][0].l && V[k].r!=dist2[i][j][0].r) dist2[i][j][1]=min(dist2[i][j][1], V[k]);
             ~^~~~~~~~~
wild_boar.cpp:126:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    for(k=0; k<V.size(); k++) if(V[k].l!=dist2[i][j][0].l && V[k].r!=dist2[i][j][1].r) dist2[i][j][2]=min(dist2[i][j][2], V[k]);
             ~^~~~~~~~~
wild_boar.cpp:127:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    for(k=0; k<V.size(); k++) if(V[k].l!=dist2[i][j][1].l && V[k].r!=dist2[i][j][0].r) dist2[i][j][3]=min(dist2[i][j][3], V[k]);
             ~^~~~~~~~~
wild_boar.cpp:86:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d%d%d", &N, &M, &T, &L);
  ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~
wild_boar.cpp:90:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d%d%d", &u, &v, &w);
   ~~~~~^~~~~~~~~~~~~~~~~~~~~~
wild_boar.cpp:135:27: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  for(i=1; i<=L; i++) scanf("%d", &A[i]);
                      ~~~~~^~~~~~~~~~~~~
wild_boar.cpp:141:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d%d", &p, &q); A[p]=q;
   ~~~~~^~~~~~~~~~~~~~~~

Subtask #1
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 607 ms 1032572 KB Output is correct
2 Correct 553 ms 1032568 KB Output is correct
3 Correct 539 ms 1032696 KB Output is correct
4 Correct 592 ms 1032636 KB Output is correct
5 Correct 545 ms 1032696 KB Output is correct
6 Correct 540 ms 1032572 KB Output is correct
7 Correct 586 ms 1032592 KB Output is correct
8 Correct 545 ms 1032568 KB Output is correct
9 Correct 547 ms 1032696 KB Output is correct
10 Correct 567 ms 1032800 KB Output is correct
11 Correct 562 ms 1032568 KB Output is correct
12 Correct 587 ms 1032568 KB Output is correct
13 Correct 547 ms 1032696 KB Output is correct
14 Correct 546 ms 1032568 KB Output is correct
15 Correct 537 ms 1032696 KB Output is correct
16 Correct 544 ms 1032712 KB Output is correct
17 Correct 567 ms 1032696 KB Output is correct
18 Correct 604 ms 1032696 KB Output is correct
19 Correct 563 ms 1032696 KB Output is correct
20 Correct 567 ms 1032824 KB Output is correct
21 Correct 590 ms 1032568 KB Output is correct
22 Correct 595 ms 1032568 KB Output is correct
23 Correct 575 ms 1032620 KB Output is correct
24 Correct 551 ms 1032696 KB Output is correct
25 Correct 595 ms 1032660 KB Output is correct

Subtask #2
35.0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 607 ms 1032572 KB Output is correct
2 Correct 553 ms 1032568 KB Output is correct
3 Correct 539 ms 1032696 KB Output is correct
4 Correct 592 ms 1032636 KB Output is correct
5 Correct 545 ms 1032696 KB Output is correct
6 Correct 540 ms 1032572 KB Output is correct
7 Correct 586 ms 1032592 KB Output is correct
8 Correct 545 ms 1032568 KB Output is correct
9 Correct 547 ms 1032696 KB Output is correct
10 Correct 567 ms 1032800 KB Output is correct
11 Correct 562 ms 1032568 KB Output is correct
12 Correct 587 ms 1032568 KB Output is correct
13 Correct 547 ms 1032696 KB Output is correct
14 Correct 546 ms 1032568 KB Output is correct
15 Correct 537 ms 1032696 KB Output is correct
16 Correct 544 ms 1032712 KB Output is correct
17 Correct 567 ms 1032696 KB Output is correct
18 Correct 604 ms 1032696 KB Output is correct
19 Correct 563 ms 1032696 KB Output is correct
20 Correct 567 ms 1032824 KB Output is correct
21 Correct 590 ms 1032568 KB Output is correct
22 Correct 595 ms 1032568 KB Output is correct
23 Correct 575 ms 1032620 KB Output is correct
24 Correct 551 ms 1032696 KB Output is correct
25 Correct 595 ms 1032660 KB Output is correct
26 Correct 558 ms 1032952 KB Output is correct
27 Correct 650 ms 1034232 KB Output is correct
28 Correct 610 ms 1034104 KB Output is correct
29 Correct 723 ms 1038348 KB Output is correct
30 Correct 680 ms 1038340 KB Output is correct
31 Correct 675 ms 1038448 KB Output is correct
32 Correct 699 ms 1038524 KB Output is correct
33 Correct 672 ms 1038328 KB Output is correct
34 Correct 667 ms 1038216 KB Output is correct
35 Correct 694 ms 1038428 KB Output is correct
36 Correct 684 ms 1038456 KB Output is correct
37 Correct 711 ms 1038340 KB Output is correct
38 Correct 700 ms 1038320 KB Output is correct
39 Correct 715 ms 1038456 KB Output is correct
40 Correct 645 ms 1038200 KB Output is correct
41 Correct 724 ms 1038328 KB Output is correct
42 Correct 659 ms 1038328 KB Output is correct
43 Correct 646 ms 1038328 KB Output is correct
44 Correct 699 ms 1038336 KB Output is correct
45 Correct 636 ms 1038376 KB Output is correct

Subtask #3
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 607 ms 1032572 KB Output is correct
2 Correct 553 ms 1032568 KB Output is correct
3 Correct 539 ms 1032696 KB Output is correct
4 Correct 592 ms 1032636 KB Output is correct
5 Correct 545 ms 1032696 KB Output is correct
6 Correct 540 ms 1032572 KB Output is correct
7 Correct 586 ms 1032592 KB Output is correct
8 Correct 545 ms 1032568 KB Output is correct
9 Correct 547 ms 1032696 KB Output is correct
10 Correct 567 ms 1032800 KB Output is correct
11 Correct 562 ms 1032568 KB Output is correct
12 Correct 587 ms 1032568 KB Output is correct
13 Correct 547 ms 1032696 KB Output is correct
14 Correct 546 ms 1032568 KB Output is correct
15 Correct 537 ms 1032696 KB Output is correct
16 Correct 544 ms 1032712 KB Output is correct
17 Correct 567 ms 1032696 KB Output is correct
18 Correct 604 ms 1032696 KB Output is correct
19 Correct 563 ms 1032696 KB Output is correct
20 Correct 567 ms 1032824 KB Output is correct
21 Correct 590 ms 1032568 KB Output is correct
22 Correct 595 ms 1032568 KB Output is correct
23 Correct 575 ms 1032620 KB Output is correct
24 Correct 551 ms 1032696 KB Output is correct
25 Correct 595 ms 1032660 KB Output is correct
26 Correct 558 ms 1032952 KB Output is correct
27 Correct 650 ms 1034232 KB Output is correct
28 Correct 610 ms 1034104 KB Output is correct
29 Correct 723 ms 1038348 KB Output is correct
30 Correct 680 ms 1038340 KB Output is correct
31 Correct 675 ms 1038448 KB Output is correct
32 Correct 699 ms 1038524 KB Output is correct
33 Correct 672 ms 1038328 KB Output is correct
34 Correct 667 ms 1038216 KB Output is correct
35 Correct 694 ms 1038428 KB Output is correct
36 Correct 684 ms 1038456 KB Output is correct
37 Correct 711 ms 1038340 KB Output is correct
38 Correct 700 ms 1038320 KB Output is correct
39 Correct 715 ms 1038456 KB Output is correct
40 Correct 645 ms 1038200 KB Output is correct
41 Correct 724 ms 1038328 KB Output is correct
42 Correct 659 ms 1038328 KB Output is correct
43 Correct 646 ms 1038328 KB Output is correct
44 Correct 699 ms 1038336 KB Output is correct
45 Correct 636 ms 1038376 KB Output is correct
46 Correct 759 ms 1044600 KB Output is correct
47 Runtime error 1151 ms 1048580 KB Execution killed with signal 9 (could be triggered by violating memory limits)
48 Halted 0 ms 0 KB -

Subtask #4
0 / 38.0

# Verdict Execution time Memory Grader output
1 Correct 607 ms 1032572 KB Output is correct
2 Correct 553 ms 1032568 KB Output is correct
3 Correct 539 ms 1032696 KB Output is correct
4 Correct 592 ms 1032636 KB Output is correct
5 Correct 545 ms 1032696 KB Output is correct
6 Correct 540 ms 1032572 KB Output is correct
7 Correct 586 ms 1032592 KB Output is correct
8 Correct 545 ms 1032568 KB Output is correct
9 Correct 547 ms 1032696 KB Output is correct
10 Correct 567 ms 1032800 KB Output is correct
11 Correct 562 ms 1032568 KB Output is correct
12 Correct 587 ms 1032568 KB Output is correct
13 Correct 547 ms 1032696 KB Output is correct
14 Correct 546 ms 1032568 KB Output is correct
15 Correct 537 ms 1032696 KB Output is correct
16 Correct 544 ms 1032712 KB Output is correct
17 Correct 567 ms 1032696 KB Output is correct
18 Correct 604 ms 1032696 KB Output is correct
19 Correct 563 ms 1032696 KB Output is correct
20 Correct 567 ms 1032824 KB Output is correct
21 Correct 590 ms 1032568 KB Output is correct
22 Correct 595 ms 1032568 KB Output is correct
23 Correct 575 ms 1032620 KB Output is correct
24 Correct 551 ms 1032696 KB Output is correct
25 Correct 595 ms 1032660 KB Output is correct
26 Correct 558 ms 1032952 KB Output is correct
27 Correct 650 ms 1034232 KB Output is correct
28 Correct 610 ms 1034104 KB Output is correct
29 Correct 723 ms 1038348 KB Output is correct
30 Correct 680 ms 1038340 KB Output is correct
31 Correct 675 ms 1038448 KB Output is correct
32 Correct 699 ms 1038524 KB Output is correct
33 Correct 672 ms 1038328 KB Output is correct
34 Correct 667 ms 1038216 KB Output is correct
35 Correct 694 ms 1038428 KB Output is correct
36 Correct 684 ms 1038456 KB Output is correct
37 Correct 711 ms 1038340 KB Output is correct
38 Correct 700 ms 1038320 KB Output is correct
39 Correct 715 ms 1038456 KB Output is correct
40 Correct 645 ms 1038200 KB Output is correct
41 Correct 724 ms 1038328 KB Output is correct
42 Correct 659 ms 1038328 KB Output is correct
43 Correct 646 ms 1038328 KB Output is correct
44 Correct 699 ms 1038336 KB Output is correct
45 Correct 636 ms 1038376 KB Output is correct
46 Correct 759 ms 1044600 KB Output is correct
47 Runtime error 1151 ms 1048580 KB Execution killed with signal 9 (could be triggered by violating memory limits)
48 Halted 0 ms 0 KB -