Submission #1011981

#TimeUsernameProblemLanguageResultExecution timeMemory
1011981vantamSjeckanje (COCI21_sjeckanje)C++17
15 / 110
2055 ms2652 KiB
#pragma GCC optimize("O3") #pragma GCC target("avx,avx2,fma") #include<bits/stdc++.h> using namespace std; const int N=3005 ; long long i,j,n,q,type,l,r,x,ma,mi,lt,rt; long long a[200005],dp[200005] ; long long si[4*N],sa[4*N],st[4*N],s[4*N],lzi[4*N],lza[4*N]; pair<int,long long> lz[4*N]; int fi[N], fa[N] ; deque<int> qq ; void up(int id, int l, int r, int u, long long x){ if(r<u || u<l) return ; if(l==r){ s[id]=x ; return ; } int mid=(l+r)/2 ; up(2*id,l,mid,u,x) ; up(2*id+1,mid+1,r,u,x) ; s[id]=max(s[2*id], s[2*id+1]) ; return ; } void fixi(int id, int l, int r){ if(lzi[id]==ma) return ; si[id]=s[id]-lzi[id] ; if(l!=r){ lzi[2*id]=lzi[id] ; lzi[2*id+1]=lzi[id] ; } lzi[id]=ma ; return ; } void upi(int id, int l, int r, int u, int v, long long x){ fixi(id,l,r) ; if(r<u || v<l) return ; if(u<=l && r<=v){ lzi[id]=x ; fixi(id,l,r) ; return ; } int mid=(l+r)/2 ; upi(2*id,l,mid,u,v,x) ; upi(2*id+1,mid+1,r,u,v,x) ; si[id]=max(si[2*id], si[2*id+1]) ; return ; } void fixa(int id, int l, int r){ if(lza[id]==ma) return ; sa[id]=s[id]+lza[id] ; if(l!=r){ lza[2*id]=lza[id] ; lza[2*id+1]=lza[id] ; } lza[id]=ma ; return ; } void upa(int id, int l, int r, int u, int v, long long x){ fixa(id,l,r) ; if(r<u || v<l) return ; if(u<=l && r<=v){ lza[id]=x ; fixa(id,l,r) ; return ; } int mid=(l+r)/2 ; upa(2*id,l,mid,u,v,x) ; upa(2*id+1,mid+1,r,u,v,x) ; sa[id]=max(sa[2*id], sa[2*id+1]) ; return ; } void fixx(int id,int l, int r,int u, int v,int ii){ if(ii==1) fixa(id,l,r) ; else fixi(id,l,r) ; if(l==u && r==v) return ; int mid=(l+r)/2 ; if(v<=mid){ fixx(2*id,l,mid,u,v,ii) ; }else{ fixx(2*id+1,mid+1,r,u,v,ii) ; } } void fix(int id,int l, int r){ if(lz[id].second==ma) return ; if(lz[id].first==1){ fixx(1,1,n,l,r,1) ; st[id]=sa[id]-lz[id].second ; }else{ fixx(1,1,n,l,r,2) ; st[id]=si[id]+lz[id].second; } if(l!=r){ lz[2*id]=lz[id] ; lz[2*id+1]=lz[id] ; } lz[id].second=ma ; return ; } void upd(int id, int l, int r, int u, int v,int ii, long long x){ fix(id,l,r) ; if(r<u || v<l) return ; if(u<=l && r<=v){ lz[id]={ii,x} ; fix(id,l,r) ; return ; } int mid=(l+r)/2 ; upd(2*id,l,mid,u,v,ii,x) ; upd(2*id+1,mid+1,r,u,v,ii,x) ; st[id]=max(st[2*id], st[2*id+1]) ; return ; } int main(){ ios_base::sync_with_stdio(false); cin.tie(NULL);cout.tie(NULL); #define NAME "test" if(fopen(NAME".inp", "r")){ freopen(NAME".inp", "r", stdin); freopen(NAME".out", "w", stdout); } cin >> n >> q; for(i=1;i<=n;i++) cin >> a[i] ; while(q--){ cin >> l >> r >> x ; for(i=l;i<=r;i++) a[i]+=x ; ma=-2000000000000000 ; for(i=0;i<=4*n;i++){ lz[i].second=ma ; si[i]=ma ; sa[i]=ma; st[i]=ma; s[i]=ma; lzi[i]=ma; lza[i]=ma; } qq.clear() ; for(i=1;i<=n;i++){ while(!qq.empty() && a[qq.back()]<=a[i]) qq.pop_back() ; if(!qq.empty()) fa[i]=qq.back()+1 ; else fa[i]=1 ; qq.push_back(i) ; } qq.clear() ; for(i=1; i<=n; i++){ while(!qq.empty() && a[qq.back()]>=a[i]) qq.pop_back() ; if(!qq.empty()) fi[i]=qq.back()+1 ; else fi[i]=1 ; qq.push_back(i) ; } dp[0]=0 ; dp[1]=0 ; up(1,1,n,1,0) ; up(1,1,n,2,0) ; upi(1,1,n,1,1,a[1]) ; upa(1,1,n,1,1,a[1]) ; upd(1,1,n,1,1,1,a[1]) ; for(i=2;i<=n;i++){ //cout << i << ' ' << fa[i] << ' ' << fi[i] << '\n' ; if(fa[i]!=fi[i]){ if(fa[i]<fi[i]){ lt=fa[i] ; rt=fi[i] ; upa(1,1,n,lt,rt-1,a[i]) ; upd(1,1,n,lt,rt-1,2,a[i]) ; }else{ lt=fi[i] ; rt=fa[i] ; upi(1,1,n,lt,rt-1,a[i]) ; upd(1,1,n,lt,rt-1,1,a[i]) ; } } upa(1,1,n,i,i,a[i]) ; upi(1,1,n,i,i,a[i]) ; upd(1,1,n,i,i,1,a[i]) ; fix(1,1,n) ; dp[i]=st[1] ; //cout << i << ' ' << dp[i] << '\n' ; up(1,1,n,i+1,dp[i]) ; } cout << dp[n] << '\n' ; } return 0; } /* 4 7 -1 3 -6 8 1 4 4 2 2 1 4 4 3 2 1 1 2 -1 1 1 2 -4 2 */

Compilation message (stderr)

Main.cpp: In function 'int main()':
Main.cpp:118:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  118 |         freopen(NAME".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
Main.cpp:119:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  119 |         freopen(NAME".out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
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