제출 #482945

#제출 시각아이디문제언어결과실행 시간메모리
482945jalsolFoehn Phenomena (JOI17_foehn_phenomena)C++17
100 / 100
101 ms12356 KiB
#ifdef LOCAL #include "local.h" #else #include <bits/stdc++.h> #define debug(...) #define DB(...) #endif using namespace std; const bool __initialization = []() { cin.tie(nullptr)->sync_with_stdio(false); #define TASK "empty" if (fopen(TASK".inp", "r")) { (void)(!freopen(TASK".inp", "r", stdin)); (void)(!freopen(TASK".out", "w", stdout)); } cout << setprecision(12) << fixed; return true; }(); using ll = long long; using ld = long double; #define all(x) x.begin(), x.end() #define rall(x) x.rbegin(), x.rend() #define For(i, l, r) for (int i = (l); i <= (r); ++i) #define Ford(i, r, l) for (int i = (r); i >= (l); --i) #define Rep(i, n) For (i, 0, (n) - 1) #define Repd(i, n) Ford (i, (n) - 1, 0) #define Fe(...) for (auto __VA_ARGS__) template <class C> inline int isz(const C& c) { return static_cast<int>(c.size()); } template <class T> inline bool chmin(T& a, const T& b) { return (a > b) ? a = b, true : false; } template <class T> inline bool chmax(T& a, const T& b) { return (a < b) ? a = b, true : false; } constexpr ld eps = 1e-9; constexpr int inf = 1e9; constexpr ll linf = 1e18; // ============================================================================= constexpr int maxn = 2e5 + 5; int n, nq, incr, decr; int a[maxn]; ll diff[maxn]; ll change(ll x) { if (x < 0) { return x * incr; } else { return x * decr; } } signed main() { cin >> n >> nq >> incr >> decr; For (i, 0, n) cin >> a[i]; ll sum = 0; For (i, 1, n) { diff[i] = a[i - 1] - a[i]; sum += change(diff[i]); } Rep (_, nq) { int l, r, x; cin >> l >> r >> x; { sum -= change(diff[l]); diff[l] -= x; sum += change(diff[l]); } if (r < n) { sum -= change(diff[r + 1]); diff[r + 1] += x; sum += change(diff[r + 1]); } cout << sum << '\n'; } }
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