Submission #885505

#TimeUsernameProblemLanguageResultExecution timeMemory
885505Marco_EscandonFoehn Phenomena (JOI17_foehn_phenomena)C++11
0 / 100
843 ms8320 KiB
#include<bits/stdc++.h> using namespace std; typedef long long ll; struct Segment_tree { struct node { int value, lazy; node(int v = 0) { value = v; lazy = 0; } }; vector <node> tree; int l; void update(int v, int s, int e, int k) { tree[v].lazy += k; tree[v].value += (e - s + 1) * k; } void push(int v, int s, int e) { if (tree[v].lazy) { int middle = (s + e) / 2; update(2 * v, s, middle, tree[v].lazy); update(2 * v + 1, middle + 1, e, tree[v].lazy); tree[v].lazy = 0; } } void increase(int node, int v, int x, int y, int s, int e) { if (x > e || y < s) return; if (s >= x && e <= y) { update(node, s, e, v); return; } push(node, s, e); int middle = (s + e) / 2; increase(node * 2, v, x, y, s, middle); increase(node * 2 + 1, v, x, y, middle + 1, e); tree[node].value = tree[node * 2].value + tree[node * 2 + 1].value; } void increase(int x, int y, int v) { increase(1, v, x, y, 1, l); } int sum(int node, int x, int y, int s, int e) { if (x > e || y < s) return 0; if (s >= x && e <= y) return tree[node].value; push(node, s, e); int middle = (s + e) / 2; return sum(node * 2, x, y, s, middle) + sum(node * 2 + 1, x, y, middle + 1, e); } int query(int x) { return sum(1, x, x, 1, l); } Segment_tree(int n) { for (l = 1; l < n; l = (l << 1)); tree.resize(2 * l); } }; main() { ll n,q,s,t; cin>>n>>q>>s>>t; ll cad[n+1]; Segment_tree asd(n+1); for(int i=0; i<n+1; i++) { cin>>cad[i]; } ll u=0,d=0; for(int i=1; i<=n; i++) { u+=max(cad[i]-cad[i-1],0LL); d+=max(cad[i-1]-cad[i],0LL); } //cout<<u<<" "<< d<<"\n"; while(q--) { ll a,b,c; cin>>a>>b>>c; //cout<<a<<b<<c; //cout<<asd.query(a)<<" "<<asd.query(b)<<"\t"; /*for(int i=1; i<n+1; i++) { cout<<cad[i]+asd.query(i)<<" "; }*/ //cout<<"\t"; if(cad[a]+asd.query(a)>=cad[a-1]+asd.query(a-1)) { if(cad[a]+asd.query(a)+c>=cad[a-1]+asd.query(a-1)) { u+=c; } else{ u-=cad[a]+asd.query(a)-(cad[a-1]+asd.query(a-1)); d+=(-c-cad[a]+asd.query(a)-(cad[a-1]+asd.query(a-1))); } } else{ if(cad[a]+asd.query(a)+c<=cad[a-1]+asd.query(a-1)) { d-=c; } else{ d-=cad[a-1]+asd.query(a-1)-(cad[a]+asd.query(a)); u+=(c-(cad[a-1]+asd.query(a-1)-(cad[a]+asd.query(a)))); } } if(b==n); else if(cad[b+1]+asd.query(b+1)>=cad[b]+asd.query(b)) { if(cad[b+1]+asd.query(b+1)>=cad[b]+asd.query(b)+c) { u-=c; } else{ u-=cad[b+1]+asd.query(b+1)-(cad[b]+asd.query(b)); d+=c-(cad[b+1]+asd.query(b+1)-(cad[b]+asd.query(b))); } } else{ if(cad[b+1]+asd.query(b+1)<=cad[b]+asd.query(b)+c) { d+=c; } else{ d-=cad[b]+asd.query(b)-(cad[b+1]+asd.query(b+1)); u+=(c-(cad[b]+asd.query(b)-(cad[b+1]+asd.query(b+1)))); } } //cout<<u<<" "<<d<<" "; asd.increase(a,b,c); cout<<-u*s+d*t<<"\n"; } }

Compilation message (stderr)

foehn_phenomena.cpp:85:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   85 | main()
      | ^~~~
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