제출 #33263

#제출 시각아이디문제언어결과실행 시간메모리
33263cheater2kFoehn Phenomena (JOI17_foehn_phenomena)C++14
100 / 100
169 ms4520 KiB
#include <bits/stdc++.h> using namespace std; const int N = 200005; int n, q, S, T; int a[N]; long long c[N]; long long ans; long long calc(long long v) { if (v < 0) return 1LL * v * S; else return 1LL * v * T; } int main() { ios_base::sync_with_stdio(false); cin.tie(0); cin >> n >> q >> S >> T; for (int i = 0; i <= n; ++i) cin >> a[i]; for (int i = 0; i <= n - 1; ++i) { c[i] = a[i] - a[i+1]; ans += calc(c[i]); } while(q--) { int l, r, X; cin >> l >> r >> X; if (l > 0) { ans -= calc(c[l - 1]); c[l - 1] -= X; ans += calc(c[l - 1]); } if (r < n) { ans -= calc(c[r]); c[r] += X; ans += calc(c[r]); } printf("%lld\n", ans); } }
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