제출 #1181280

#제출 시각아이디문제언어결과실행 시간메모리
1181280TudorMaFoehn Phenomena (JOI17_foehn_phenomena)C++20
100 / 100
99 ms7320 KiB
#include <bits/stdc++.h> #include <ext/pb_ds/assoc_container.hpp> #include <ext/pb_ds/tree_policy.hpp> #define fi first #define sc second #define pb push_back #define int long long using namespace std; using namespace __gnu_pbds; typedef long long ll; typedef double db; typedef pair<int, int> pii; template<typename type> using ordered_set = tree<type, null_type, less<type>, rb_tree_tag, tree_order_statistics_node_update>; const int N = 2e5 + 5, mod = 1e9 + 7, inf = 2e9; const int dl[] = {-1, 0, 1, 0}, dc[] = {0, 1, 0, -1}; const int ddl[] = {-1, -1, -1, 0, 1, 1, 1, 0}, ddc[] = {-1, 0, 1, 1, 1, 0, -1, -1}; mt19937 gen(chrono::steady_clock::now().time_since_epoch().count()); int rng(int lo = 1, int hi = INT_MAX) { uniform_int_distribution<int> rnd(lo, hi); return rnd(gen); } struct mint { int val; mint(int32_t x = 0) { val = x % mod; } mint(long long x) { val = x % mod; } mint operator+(mint x) { return val + x.val; } mint operator-(mint x) { return val - x.val + mod; } mint operator*(mint x) { return 1LL * val * x.val; } void operator+=(mint x) { val = (*this + x).val; } void operator-=(mint x) { val = (*this - x).val; } void operator*=(mint x) { val = (*this * x).val; } friend auto operator>>(istream& in, mint &x) -> istream& { in >> x.val; x.val %= mod; return in; } friend auto operator<<(ostream& out, mint const &x) -> ostream& { out << x.val; return out; } }; int n, q, s, t, ans, v[N]; struct fenwick { int t[N]; inline int lsb(int x) { return x & -x; } void update(int p, int x) { while(p <= n) { t[p] += x; p += lsb(p); } } int pref(int p) { int ans = v[p]; while(p) { ans += t[p]; p -= lsb(p); } return ans; } } aib; int getdiff(int p) { if(p == n + 1) return 0; int x = aib.pref(p-1), y = aib.pref(p); if(x < y) return (x - y) * s; else return (x - y) * t; } int32_t main() { cin.tie(nullptr)->sync_with_stdio(0); cin >> n >> q >> s >> t; cin >> v[0]; for(int i=1; i<=n; i++) { cin >> v[i]; if(v[i-1] < v[i]) ans -= (v[i] - v[i-1]) * s; else ans += (v[i-1] - v[i]) * t; } while(q--) { int l, r, c; cin >> l >> r >> c; ans -= getdiff(l); ans -= getdiff(r+1); aib.update(l, c); aib.update(r+1, -c); ans += getdiff(l); ans += getdiff(r+1); cout << ans << '\n'; } return 0; }
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