제출 #522338

#제출 시각아이디문제언어결과실행 시간메모리
522338perchutsFoehn Phenomena (JOI17_foehn_phenomena)C++17
100 / 100
731 ms19720 KiB
#include <bits/stdc++.h> #define maxn (int)(1e5+51) #define all(x) x.begin(), x.end() #define sz(x) (int) x.size() #define endl '\n' #define ll long long #define pb push_back #define ull unsigned long long #define ii pair<int,int> #define iii tuple<int,int,int> #define inf 2000000001 #define mod 1000000007 //998244353 #define _ ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL); using namespace std; template<typename X, typename Y> bool ckmin(X& x, const Y& y) { return (y < x) ? (x=y,1):0; } template<typename X, typename Y> bool ckmax(X& x, const Y& y) { return (x < y) ? (x=y,1):0; } ll v[2*maxn],seg[8*maxn],lazy[8*maxn]; int n,q; ll s,t,sum; void push(int i,int l,int r){ if(l!=r)lazy[2*i]+=lazy[i],lazy[2*i+1]+=lazy[i]; seg[i]+=lazy[i]*(1LL*(r-l+1)); lazy[i] = 0; } void update(int i,int l,int r,int x,int y,ll d){ push(i,l,r); if(l>y||r<x)return; if(x<=l&&r<=y){ lazy[i]+=d; push(i,l,r); return; } int md = (l+r)/2; update(2*i,l,md,x,y,d); update(2*i+1,md+1,r,x,y,d); seg[i] = seg[2*i]+seg[2*i+1]; } ll query(int i,int l,int r,int x){ push(i,l,r); if(l>x||r<x)return 0; if(l==r)return seg[i]; int md = (l+r)/2; return query(2*i,l,md,x) + query(2*i+1,md+1,r,x); } void updatesum(int i){ ll l = query(1,1,n,i-1), r = query(1,1,n,i); sum-=v[i]; if(l<=r)v[i] = (l-r)*(s); else v[i] = (l-r)*(t); sum+=v[i]; } int main(){_ cin>>n>>q>>s>>t; ll last = 0; n++; for(int i=1;i<=n;i++){ ll x;cin>>x; update(1,1,n,i,i,x); if(i!=1)updatesum(i); last = x; // cout<<sum<<" "; } // cout<<endl; 0 18 7 while(q--){ int l,r; ll x;cin>>l>>r>>x;l++,r++; update(1,1,n,l,r,x); if(r!=n)updatesum(r+1); updatesum(l); cout<<sum<<endl; } }

컴파일 시 표준 에러 (stderr) 메시지

foehn_phenomena.cpp: In function 'int main()':
foehn_phenomena.cpp:63:8: warning: variable 'last' set but not used [-Wunused-but-set-variable]
   63 |     ll last = 0;
      |        ^~~~
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