Submission #410337

#	Time	Username	Problem	Language	Result	Execution time	Memory
410337		alishahali1382	Bitaro, who Leaps through Time (JOI19_timeleap)	C++14	0 / 100	251 ms	524292 KiB

timeleap

#include <bits/stdc++.h>
#pragma GCC optimize ("O2,unroll-loops")
//#pragma GCC optimize("no-stack-protector,fast-math")
//#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")

using namespace std;
typedef long long ll;
typedef long double ld;
typedef pair<int, int> pii;
typedef pair<pii, int> piii;
typedef pair<ll, ll> pll;
#define debug(x) cerr<<#x<<'='<<(x)<<endl;
#define debugp(x) cerr<<#x<<"= {"<<(x.first)<<", "<<(x.second)<<"}"<<endl;
#define debug2(x, y) cerr<<"{"<<#x<<", "<<#y<<"} = {"<<(x)<<", "<<(y)<<"}"<<endl;
#define debugv(v) {cerr<<#v<<" : ";for (auto x:v) cerr<<x<<' ';cerr<<endl;}
#define all(x) x.begin(), x.end()
#define pb push_back
#define kill(x) return cout<<x<<'\n', 0;

const int inf=1000000010;
const ll INF=1000000000000001000LL;
const int mod=1000000007;
const int MAXN=3010, LOG=20;

int n, m, k, u, v, x, y, t, l, r, a, b;

struct Node{
	ll dp[2][2];
	Node(ll l=0, ll r=0){
		dp[0][0]=l;
		dp[0][1]=0;
		dp[1][0]=0;
		dp[1][1]=-r;
	}
};
Node Merge(Node X, Node Y){
	Node Z;
	for (int a=0; a<2; a++) for (int b=0; b<2; b++)
		Z.dp[a][b]=max(X.dp[a][0]+Y.dp[1][b], X.dp[a][1]+Y.dp[0][b]);
	return Z;
}
struct Solver{
	int L[MAXN], R[MAXN];
	Node seg[MAXN<<2];
	Solver(){
		seg[0].dp[0][0]=-INF;
		seg[0].dp[0][1]=0;
		seg[0].dp[1][0]=0;
		seg[0].dp[1][1]=-INF;
	}
	void Build(int id, int tl, int tr){
		if (tr-tl==1){/*
			seg[id].dp[0][0]=L[tl];
			seg[id].dp[0][1]=0;
			seg[id].dp[1][0]=0;
			seg[id].dp[1][1]=-R[tl];*/
			seg[id]=Node(L[tl], R[tl]);
			return ;
		}
		int mid=(tl+tr)>>1;
		Build(id<<1, tl, mid);
		Build(id<<1 | 1, mid, tr);
		seg[id]=Merge(seg[id<<1], seg[id<<1 | 1]);
	}
	void Set(int id, int tl, int tr, int pos){
		if (pos<tl || tr<=pos) return ;
		if (tr-tl==1){
			seg[id].dp[0][0]=L[tl];
			seg[id].dp[0][1]=0;
			seg[id].dp[1][0]=0;
			seg[id].dp[1][1]=-R[tl];
			return ;	
		}
		int mid=(tl+tr)>>1;
		Set(id<<1, tl, mid, pos);
		Set(id<<1 | 1, mid, tr, pos);
		seg[id]=Merge(seg[id<<1], seg[id<<1 | 1]);	
	}
	Node Get(int id, int tl, int tr, int l, int r){
		if (r<=tl || tr<=l) return seg[0];
		if (l<=tl && tr<=r) return seg[id];
		int mid=(tl+tr)>>1;
		return Merge(Get(id<<1, tl, mid, l, r), Get(id<<1 | 1, mid, tr, l, r));
	}
	ll Solve(int x, int y, int a, int b){
		a-=x;
		b-=y;
		Node X(a, a);
		Node Y=Get(1, 1, n, x, y);
		Node Z(b, b);
		X=Merge(X, Merge(Y, Z));
//		return max(X.dp[0][1], X.dp[1][0]);
		return X.dp[0][1];
	}
} S1, S2;

int main(){
	ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0);
	//freopen("input.txt", "r", stdin);
	//freopen("output.txt", "w", stdout);
	cin>>n>>m;
	for (int i=1; i<n; i++){
		cin>>l>>r; r--;
		S1.L[i]=l-i;
		S2.L[n-i]=l-(n-i);
		S1.R[i]=r-i;
		S2.R[n-i]=r-(n-i);
	}
	S1.Build(1, 1, n);
	S2.Build(1, 1, n);
	
	while (m--){
		cin>>t;
		if (t==1){
			cin>>x>>l>>r;
			r--;
			S1.L[x]=l-x;
			S2.L[n-x]=l-(n-x);
			S1.R[x]=r-x;
			S2.R[n-x]=r-(n-x);
			S1.Set(1, 1, n, x);
			S2.Set(1, 1, n, n-x);
		}
		else{
			cin>>x>>a>>y>>b;
			if (x==y) cout<<max(0, a-b)<<"\n";
			if (x<y) cout<<S1.Solve(x, y, a, b)<<"\n";
			if (x>y) cout<<S2.Solve(n+1-x, n+1-y, a, b)<<"\n";
		}
	}
	
	return 0;
}
/*
5 1
3 5
4 8
2 6
5 10
2 5 3 1 10

5 1
5 10
2 6
4 8
3 5
2 1 3 5 10

*/

• Subtask 1: 0 / 4
• Subtask 2: 0 / 30
• Subtask 3: 0 / 66