Submission #1117275

#	Time	Username	Problem	Language	Result	Execution time	Memory
1117275		thelegendary08	Cutting a Rectangle (BOI24_rectangle)	C++17	100 / 100	403 ms	242624 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;
const int mxn = 5e6 + 5;
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});
	}
	int s = 0;
	f0r(i,n){
		s += v[i].first * v[i].second;
	}
	vvi big(mxn);
	vvi small(mxn);
	vb vis(n, 0);
	f0r(i,n){
		big[v[i].first].pb(i);
		small[v[i].second].pb(i);
	}
	vi ans;
	FOR(l, 1, mxn){
		if(s % l == 0 && l <= s/l){
			int a = l;
			int b = s/l;
			f0r(i,n){
				vis[i] = 0;
			}
			
			while(true){
				bool ok = 0;
				if(a < b)swap(a,b);
				if(a < mxn){
					for(auto u : big[a]){
						if(!vis[u]){
							vis[u] = 1;
							ok = 1;
							b -= v[u].second;
						}
					}
				}
				
				if(ok)continue;
				for(auto u : small[b]){
					if(!vis[u]){
						vis[u] = 1;
						ok = 1;
						a -= v[u].first;
					}
				}
				if(ok)continue;
				for(auto u : big[b]){
					if(!vis[u]){
						vis[u] = 1;
						ok = 1;
						a -= v[u].second;
					}
				}
				if(!ok)break;
			}
			if(a * b == 0)ans.pb(l);
		}
	}	
	out(ans.size());
	f0r(i, ans.size())out(ans[i]);
}

Compilation message (stderr)

Main.cpp: In function 'int main()':
Main.cpp:11:31: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   11 | #define f0r(i,n) for(int i=0;i<n;i++)
......
   99 |  f0r(i, ans.size())out(ans[i]);
      |      ~~~~~~~~~~~~~             
Main.cpp:99:2: note: in expansion of macro 'f0r'
   99 |  f0r(i, ans.size())out(ans[i]);
      |  ^~~

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