Submission #765780

#	Time	Username	Problem	Language	Result	Execution time	Memory
765780		khshg	Meetings (IOI18_meetings)	C++14	0 / 100	1890 ms	3044 KiB

meetings

#include<bits/stdc++.h>
using namespace std;
 
using ll = long long;
using ld = long double;
using str = string;
 
using pi = pair<int, int>;
using pl = pair<ll, ll>;
using pd = pair<ld, ld>;
#define mp make_pair
#define ff first
#define ss second
 
#define ar array
template<class T> using V = vector<T>;
using vi = V<int>;
using vb = V<bool>;
using vl = V<ll>;
using vd = V<ld>;
using vs = V<str>;
using vpi = V<pi>;
using vpl = V<pl>;
using vpd = V<pd>;
 
#define sz(x) (int)((x).size())
#define bg(x) begin(x)
#define all(x) bg(x), end(x)
#define rall(x) (x).rbegin(), (x).rend()
#define sor(x) sort(all(x))
#define rsz resize
#define ins insert
#define pb push_back
#define eb emplace_back
#define ft front()
#define bk back()
#define lb lower_bound
#define ub upper_bound
 
#define FOR(i, a, b) for(int i = (a); i < (b); ++i)
#define F0R(i, a) FOR(i, 0, a)
#define ROF(i, a, b) for(int i = (b) - 1; i >= (a); --i)
#define R0F(i, a) ROF(i, 0, a)
#define rep(a) F0R(_, a)
#define trav(a, x) for(auto& a : x)
 
template<class T> bool ckmin(T& a, const T& b) { return (b < a ? a = b, 1 : 0); }
template<class T> bool ckmax(T& a, const T& b) { return (b > a ? a = b, 1 : 0); }

const ll INF = 0x3f3f3f3f3f3f3f3f;
 
vl minimum_costs(vi H, vi L, vi R) {
	int N = sz(H);
	V<vpl> toL(N), toR(N);
	F0R(i, N) {
		if(i) toL[i] = toL[i - 1];
		while(sz(toL[i]) && H[toL[i].bk.ff] <= H[i]) {
			toL[i].pop_back();
		}
		toL[i].eb(i, 0);
	}
	R0F(i, N) {
		if(i + 1 < N) toR[i] = toR[i + 1];
		while(sz(toR[i]) && H[toR[i].bk.ff] <= H[i]) {
			toR[i].pop_back();
		}
		toR[i].eb(i, 0);
	}
	F0R(i, N) {
		reverse(all(toL[i]));
		toL[i].eb(-1, 0);
		F0R(j, sz(toL[i]) - 1) {
			toL[i][j].ss = (toL[i][j].ff - toL[i][j + 1].ff) * H[toL[i][j].ff] + (j ? toL[i][j - 1].ss : 0);
		}
		reverse(all(toL[i]));
		toR[i].eb(N, 0);
		F0R(j, sz(toR[i]) - 1) {
			toR[i][j].ss = (toR[i][j + 1].ss - toR[i][j].ss) * H[toR[i][j].ff] + (j ? toR[i][j - 1].ss : 0);
		}
	}
	int Q = sz(L);
	vl ans(Q, INF);
	F0R(q, Q) {
		FOR(i, L[q], R[q] + 1) {
			ll x = lb(all(toR[i]), mp((ll)R[q], 0LL)) - bg(toR[i]);
			ll rsd = (x > 0 ? toR[i][x - 1].ss : 0LL) + 1LL * (R[q] - x + 1) * H[toR[i][x].ff];
			ll y = lb(all(toL[i]), mp((ll)L[q], 0LL)) - bg(toL[i]);
			ll lsd = (y + 1 < sz(toL[i]) ? toL[i][y + 1].ss : 0LL) + (toL[i][y].ff - i + 1) * H[toL[i][y].ff];
			ckmin(ans[q], lsd + rsd - (ll)H[i]);
		}
	}
	return ans;
}

• Subtask 1: 0 / 4
• Subtask 2: 0 / 15
• Subtask 3: 0 / 17
• Subtask 4: 0 / 24
• Subtask 5: 0 / 40