제출 #535369

#제출 시각아이디문제언어결과실행 시간메모리
535369amunduzbaevFoehn Phenomena (JOI17_foehn_phenomena)C++17
100 / 100
130 ms7240 KiB
#include "bits/stdc++.h" using namespace std; #define ar array #define int long long const int N = 2e5 + 5; int a[N], d[N]; signed main(){ ios::sync_with_stdio(0); cin.tie(0); int n, q, s, t; cin>>n>>q>>s>>t; for(int i=0;i<=n;i++) cin>>a[i]; int res = 0; for(int i=1;i<=n;i++){ d[i] = a[i] - a[i-1]; if(d[i] > 0) res -= d[i] * s; else res -= d[i] * t; } auto upd = [&](int i, int x){ if(i > n) return; if(d[i] > 0) res += d[i] * s; else res += d[i] * t; d[i] += x; if(d[i] > 0) res -= d[i] * s; else res -= d[i] * t; }; while(q--){ int l, r, x; cin>>l>>r>>x; upd(l, x); upd(r+1, -x); cout<<res<<"\n"; } }
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