Submission #400082

#	Time	Username	Problem	Language	Result	Execution time	Memory
400082		keta_tsimakuridze	Triple Jump (JOI19_jumps)	C++14	100 / 100	1915 ms	114916 KiB

jumps

#include<bits/stdc++.h>
#define f first
#define int long long
#define s second
using namespace std;
const int N=5e5+5,mod=1e9+7;
int t,a[N],L[N],R[N],lazy[4*N],ans[N],n,F;
pair<int,int> tree[4*N];
vector<int>V[N];
vector<pair<int,int> > q[N];
void update(int u,int start,int end,int l,int r,int val,int f) {
	if(lazy[u]){
			tree[u].s = max(tree[u].s,tree[u].f + lazy[u]);
			if(l!=r){
				lazy[2*u]=max(lazy[2*u],lazy[u]);
				lazy[2*u+1]=max(lazy[2*u+1],lazy[u]);
			}
			lazy[u] = 0;
	}
	if(l>end || r<start) return;
	if(start<=l && r<=end) { 
		if(f == 0) tree[u].f = val,tree[u].s = val;
		else {
			lazy[u] = val;
			tree[u].s = max(tree[u].s,tree[u].f + lazy[u]);
			if(l!=r){
				lazy[2*u]=max(lazy[2*u],lazy[u]);
				lazy[2*u+1]=max(lazy[2*u+1],lazy[u]);
			}
			lazy[u] = 0;
		}
		return;
	}
	int mid=(l+r)/2;
	update(2*u,start,end,l,mid,val,f);
	update(2*u+1,start,end,mid+1,r,val,f);
	tree[u].s = max(tree[2*u].s,tree[2*u+1].s);
	tree[u].f = max(tree[2*u].f,tree[2*u+1].f);
}
int getans(int u,int start,int end,int l,int r){
	if(lazy[u]){
			tree[u].s = max(tree[u].s,tree[u].f + lazy[u]);
			if(l!=r){
				lazy[2*u]=max(lazy[2*u],lazy[u]);
				lazy[2*u+1]=max(lazy[2*u+1],lazy[u]);
			}
			lazy[u] = 0;
	}
	if(l>end || r<start) return 0;
	if(start<=l && r<=end) {
		return tree[u].s;
	}
	int mid=(l+r)/2;
	return max(getans(2*u,start,end,l,mid),getans(2*u+1,start,end,mid+1,r));	
}
string s;
 main(){
	// t=1;
	cin>>n;
	for(int i=1;i<=n;i++){
		cin>>a[i];
		int x=i-1;
		while(x && a[x]<a[i]){
			x=L[x];
		}
		L[i]=x;
		V[x].push_back(i);
	} 
	for(int i=n;i>=1;i--){
		int x = i+1;
		while(x<=n && a[x]<a[i]){
			x=R[x];
		}
		R[i]=x;
		V[i].push_back(x);
		
	}
	int Q;
	cin>>Q;
	for(int i=1;i<=Q;i++){
		int l,r;
		cin>>l>>r;
		q[l].push_back({r,i});
	}
	for(int i=n;i>=1;i--){
		update(1,i,i,1,n,a[i],0);
		for(int j=0;j<V[i].size();j++){
			int ind = 2*V[i][j]-i;
			if(i==3 && V[i][j]==4) F=1;
			update(1,ind,n,1,n,a[i]+a[V[i][j]],1); F=0;
		}
		for(int j=0;j<q[i].size();j++){
			if(i==2) F=1;
			ans[q[i][j].s]=getans(1,i+2,q[i][j].f,1,n); F=0;
		}
	}
	for(int i=1;i<=Q;i++){
		cout<<ans[i]<<" ";
	}
}

Compilation message (stderr)

jumps.cpp:57:7: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   57 |  main(){
      |       ^
jumps.cpp: In function 'int main()':
jumps.cpp:87:16: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   87 |   for(int j=0;j<V[i].size();j++){
      |               ~^~~~~~~~~~~~
jumps.cpp:92:16: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   92 |   for(int j=0;j<q[i].size();j++){
      |               ~^~~~~~~~~~~~

• Subtask 1: 5 / 5
• Subtask 2: 14 / 14
• Subtask 3: 27 / 27
• Subtask 4: 54 / 54