Submission #950124

#	Time	Username	Problem	Language	Result	Execution time	Memory
950124		Baytoro	Planine (COCI21_planine)	C++17	20 / 110	482 ms	40412 KiB

Main

#include <bits/stdc++.h>
using namespace std;
#define ios ios::sync_with_stdio(false); cin.tie(NULL);
#define pb push_back
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(), x.rend()
#define fr first
#define sc second
#define mp make_pair
#define ll long long
const ll INF=1e18,N=2e5+5;
bool cmp(pair<double,double> a, pair<double,double> b){
	return a.sc<b.sc;
}
void solve(){
	int n,h;cin>>n>>h;
	vector<int> x(n),y(n);
	for(int i=0;i<n;i++)
		cin>>x[i]>>y[i];
	vector<double> l(n),r(n);
	vector< pair<double,double> > v;
	stack<int> st;
	for(int i=2;i<n-1;i+=2){
		double slope=(y[i+1]-y[i])/(x[i+1]-x[i]+0.0);
		r[i]=x[i]+(h-y[i])/slope;
		slope = (y[i]-y[i-1])/(x[i]-x[i-1]+0.0);
		l[i]=x[i-1]+(h-y[i-1])/slope;
		v.pb(mp(l[i],r[i]));
	}
	sort(all(v), cmp);
	int ans=1;
	double lx=v[0].fr,rx=v[0].sc;
	for(int i=1;i<v.size();i++){
		if(v[i].fr>rx+1e-9){
			rx=v[i].sc;
			ans++;
		}
	}
	/*cout<<fixed<<setprecision(3);
	for(int i=0;i<n;i++)
		cout<<l[i]<<' '<<r[i]<<endl;*/
	cout<<ans;
}
int main(){
	solve();
}

Compilation message (stderr)

Main.cpp: In function 'void solve()':
Main.cpp:33:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<double, double> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   33 |  for(int i=1;i<v.size();i++){
      |              ~^~~~~~~~~
Main.cpp:32:9: warning: unused variable 'lx' [-Wunused-variable]
   32 |  double lx=v[0].fr,rx=v[0].sc;
      |         ^~

• Subtask 1: 20 / 20
• Subtask 2: 0 / 30
• Subtask 3: 0 / 60