Submission #1113740

#	Time	Username	Problem	Language	Result	Execution time	Memory
1113740		thelegendary08	Cutting a Rectangle (BOI24_rectangle)	C++17	25 / 100	804 ms	7872 KiB

Main

#include<bits/stdc++.h>
#define pb push_back
#define int long long
#define vi vector<int>
#define vvi vector<vector<int>>
#define pii pair<int, int>
#define vpii vector<pair<int, int>>
#define vc vector<char>
#define vb vector<bool>
#define mii map<int,int>
#define f0r(i,n) for(int i=0;i<n;i++)
#define FOR(i,k,n) for(int i=k;i<n;i++)
#define all(v) (v).begin(),(v).end()
#define rall(v) (v).rbegin(),(v).rend()
#define in(a) int a; cin>>a
#define in2(a,b) int a,b; cin>>a>>b
#define in3(a,b,c) int a,b,c; cin>>a>>b>>c
#define in4(a,b,c,d) int a,b,c,d; cin>>a>>b>>c>>d
#define vin(v,n); vi v(n); f0r(i,n){cin>>v[i];}
#define out(a) cout<<a<<'\n'
#define out2(a,b) cout<<a<<' '<<b<<'\n'
#define out3(a,b,c) cout<<a<<' '<<b<<' '<<c<<'\n'
#define out4(a,b,c,d) cout<<a<<' '<<b<<' '<<c<<' '<<d<<'\n'
#define vout(v) for(auto u : v){cout<<u<<' ';} cout<<'\n'
#define dout(a) cout<<a<<' '<<#a<<'\n'
#define dout2(a,b) cout<<a<<' '<<#a<<' '<<b<<' '<<#b<<'\n'
#define yn(x); if(x){cout<<"YES"<<'\n';}else{cout<<"NO"<<'\n';}
const int leg = 1e9 + 7;
const int mod = 998244353;
using namespace std;
signed main(){
	ios::sync_with_stdio(false);
	cin.tie(NULL);
	//ifstream cin(".in");
	//ofstream cout(".out");
	in(n);
	vpii v;
	f0r(i,n){
		in2(a,b);
		
		v.pb({a,b});
	}
	if(n <= 10){
		set<int>s;
		do{
			vpii curr = {v[0]};
			bool ok = 1;
			FOR(i, 1, n){
				vpii c;
				for(auto cur : curr){
					if(cur.first == v[i].first && cur.second == v[i].second){
						int a = cur.first * 2;
						int b = cur.second;
						if(a < b)swap(a,b);
						c.pb({a,b});
						a = cur.second * 2;
						b = cur.first;
						if(a < b)swap(a,b);
						c.pb({a,b});
					}
					else if(cur.first == v[i].second){
						int a = cur.first;
						int b = cur.second + v[i].first;
						if(a < b)swap(a,b);
						c.pb({a,b});
					}
					else if(cur.second == v[i].first){
						int a = cur.second;
						int b = cur.first + v[i].second;
						if(a < b)swap(a,b);
						c.pb({a,b});
					}
					else if(cur.first == v[i].first){
						int a = cur.first;
						int b = cur.second + v[i].second;
						if(a < b)swap(a,b);
						c.pb({a,b});
					}
					else if(cur.second == v[i].second){
						int a = cur.second;
						int b = cur.first + v[i].first;
						if(a < b)swap(a,b);
						c.pb({a,b});
					}
				}
				curr = c;
				
			}
			for(auto u : curr){
				s.insert(u.second);
			}
			
		}while(next_permutation(all(v)));
		out(s.size());
		for(auto u : s)out(u);
	}
	else{
		vi w;
		vi ans;
		f0r(i, n){
			w.pb(v[i].first);
		}
		set<int>s;
		f0r(i,n)s.insert(w[i]);
		int sum = 0;
		f0r(i, n)sum += w[i];
		FOR(i, 1 , n+1){
			if(sum % i == 0 && sum / i >= i){
				if(i == 1){
					ans.pb(i);
				}
				else{
					int l = sum / i;
					bool ok = 1;
					int tmp = 0;
					tmp += l;
					if(s.count(l) == 0)ok = 0;
					for(int j = i-1; j>=2; j--){
						l--;
						if(s.count(j) == 0 || s.count(l) == 0){
							ok = 0;
						}
						tmp += l; 
						tmp += j;
					}
					if(ok){
						if(sum == tmp + l || sum == tmp + l + i){
							ans.pb(i);
						}
					}
					
				}
			}
			
		}
	}
	
}

Compilation message (stderr)

Main.cpp: In function 'int main()':
Main.cpp:47:9: warning: unused variable 'ok' [-Wunused-variable]
   47 |    bool ok = 1;
      |         ^~

• Subtask 1: 25 / 25
• Subtask 2: 0 / 20
• Subtask 3: 0 / 55