Submission #997333

#TimeUsernameProblemLanguageResultExecution timeMemory
997333MalixFoehn Phenomena (JOI17_foehn_phenomena)C++14
30 / 100
591 ms15696 KiB
#include <bits/stdc++.h> using namespace std; typedef long long ll; typedef vector<int> vi; typedef vector<vi> vii; typedef pair<int,int> pi; typedef vector<pi> pii; typedef tuple<int,int,int> tii; #define REP(i,a,b) for(int i=a;i<b;i++) #define F first #define S second #define PB push_back #define MP make_pair #define LSOne(s) ((s)&(-s)) ll INF=1e18+10; int inf=1e9+10; ll M=1e9+7; vector<ll> a,b; void update(int l,int r,int k,int x,int y,int z){ if(x>y)return; //cout<<l<<" "<<r<<" "<<x<<" "<<y<<"\n"; if(l==x&&r==y)b[k]+=z; else{ int m=(l+r)/2; update(l,m,k*2,x,min(m,y),z); update(m+1,r,k*2+1,max(x,m+1),y,z); } } ll find(int l,int r,int k,ll v){ if(l==r)return a[v]+b[k]; int m=(l+r)/2; if(v>m)return b[k]+find(m+1,r,k*2+1,v); else return b[k]+find(l,m,k*2,v); } int main() { //ios::sync_with_stdio(0); //cin.tie(0); //freopen("test_input.txt", "r", stdin); //freopen("test_output.txt", "w", stdout); int n,q;ll s,t; cin>>n>>q>>s>>t; n++; a.resize(n); REP(i,0,n)cin>>a[i]; b.resize(4*n+1,0); int x=0,y=0; vi cu(n,0); REP(i,0,n-1)(a[i]<a[i+1]?x+=abs(a[i]-a[i+1]):y+=abs(a[i]-a[i+1])); REP(i,0,n-1)if(a[i]<a[i+1])cu[i]=1; while(q--){ int c,d,e;cin>>c>>d>>e; ll g1=find(0,n-1,1,c-1); ll g2=find(0,n-1,1,c); if(cu[c-1])x-=abs(g1-g2); else y-=abs(g1-g2); if(d!=n-1){ g1=find(0,n-1,1,d); g2=find(0,n-1,1,d+1); if(cu[d])x-=abs(g1-g2); else y-=abs(g1-g2); } update(0,n-1,1,c,d,(ll)e); ll val1=find(0,n-1,1,c-1); ll val2=find(0,n-1,1,c); //cout<<val1<<" "<<val2<<"\n"; if(val1<val2){ cu[c-1]=1; x+=abs(val1-val2); } else{ cu[c-1]=0; y+=abs(val1-val2); } if(d!=n-1){ val1=find(0,n-1,1,d); val2=find(0,n-1,1,d+1);//cout<<val1<<" "<<val2<<"\n"; if(val1<val2){ cu[d]=1; x+=abs(val1-val2); } else{ cu[d]=0; y+=abs(val1-val2); } } //cout<<x<<" "<<y<<"\n"; cout<<t*y-x*s<<"\n"; } }
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