Submission #35839

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
35839	2017-12-01 10:40:35	funcsr	Building Bridges (CEOI17_building)	C++14	100 / 100	666 ms	23176 KiB

building

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#include <iostream>
#include <vector>
#include <queue>
#include <string>
#include <set>
#include <cassert>
#define rep(i, n) for (int i=0; i<(n); i++)
#define all(xs) xs.begin(), xs.end()
#define INF (1LL<<60)
#define _1 first
#define _2 second
using namespace std;
typedef pair<int, long long> P;
P operator -(const P &a, const P &b) { return P(a._1-b._1, a._2-b._2); }
inline long long det(P a, P b) { return 1LL*a._1*b._2 - 1LL*a._2*b._1; }
int N;
int H[100000], W[100000];
long long dp[1000001];
long long f[1000001];
set<int> ps;
inline P get(int x) { return P(x, f[x]); }
bool is_all_convex() {
  vector<P> xs;
  for (int x : ps) xs.push_back(P(x, f[x]));
  rep(i, (int)xs.size()-2) {
    if (det(xs[i+1]-xs[i], xs[i+2]-xs[i]) <= 0) return false;
  }
 
 
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• Subtask 1: 30 / 30
• Subtask 2: 30 / 30
• Subtask 3: 40 / 40