Submission #633591

#	Time	Username	Problem	Language	Result	Execution time	Memory
633591		inksamurai	Unija (COCI17_unija)	C++17	100 / 100	318 ms	47508 KiB

unija

#include <bits/stdc++.h>
#define int ll
using namespace std;
#define rep(i,n) for(int i=0;i<n;i++)
#define rng(i,c,n) for(int i=c;i<n;i++)
#define per(i,n) for(int i=n-1;i>=0;i--)
#define fi first
#define se second
#define pb push_back
#define sz(a) (int)a.size()
#define vec(...) vector<__VA_ARGS__>
#define _3PGDklf ios::sync_with_stdio(0),cin.tie(0)
typedef long long ll;
using pii=pair<int,int>;
using vi=vector<int>;
void print(){cout<<'\n';}
template<class h,class...t>
void print(const h&v,const t&...u){cout<<v<<' ',print(u...);}
// e

signed main(){
_3PGDklf;
	int n;
	cin>>n;
	vec(pii) a(n);
	rep(i,n){
		cin>>a[i].fi>>a[i].se;
		a[i].fi/=2;
		a[i].se/=2;
	}
	sort(a.begin(), a.end());
	int sun=0;
	vec(pii) stk;
	stk.pb(pii(0,0));
	rep(i,n){
		pii p=a[i];
		if(!sz(stk)){
			stk.pb(p);
			sun+=p.fi*p.se;
		}else{
			while(sz(stk)>1){
				pii np=stk.back();
				if(np.se>p.se){
					break;
				}else{
					stk.pop_back();
					sun-=(np.fi-stk.back().fi)*np.se;
				}
			}
			sun+=(p.fi-stk.back().fi)*p.se;
			stk.pb(p);
		}
	}
	print(sun*4);
}

• Subtask 1: 10 / 10
• Subtask 2: 10 / 10
• Subtask 3: 10 / 10
• Subtask 4: 10 / 10
• Subtask 5: 10 / 10
• Subtask 6: 10 / 10
• Subtask 7: 10 / 10
• Subtask 8: 10 / 10
• Subtask 9: 10 / 10
• Subtask 10: 10 / 10