제출 #51457

#제출 시각아이디문제언어결과실행 시간메모리
51457IOrtroiiiFoehn Phenomena (JOI17_foehn_phenomena)C++14
100 / 100
522 ms7548 KiB
#include <bits/stdc++.h> using namespace std; const int N = 2e5 + 5; int n, q; long long s, t; long long a[N], b[N]; long long res = 0; long long fuck(long long x) { if (x < 0) return s * x; return t * x; } int main() { ios_base::sync_with_stdio(false); cin >> n >> q >> s >> t; for (int i = 0;i <= n;++i) cin >> a[i]; for (int i = 1;i <= n;++i) { b[i] = a[i - 1] - a[i]; res += fuck(b[i]); } while (q--) { int l, r; long long x; cin >> l >> r >> x; if (l) { res -= fuck(b[l]); b[l] -= x; res += fuck(b[l]); } if (r < n) { res -= fuck(b[r + 1]); b[r + 1] += x; res += fuck(b[r + 1]); } cout << res << '\n'; } }
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