Submission #442275

#	Time	Username	Problem	Language	Result	Execution time	Memory
442275		amunduzbaev	Aliens (IOI16_aliens)	C++14	25 / 100	2077 ms	17380 KiB

aliens

/* made by amunduzbaev */
#include "aliens.h"
//~ #include "grader.cpp"
#include "bits/stdc++.h"
using namespace std;
//~ #include <ext/pb_ds/assoc_container.hpp>
//~ #include <ext/pb_ds/tree_policy.hpp>
//~ using namespace __gnu_pbds;
//~ template<class T> using oset = tree<T, 
//~ null_type, less_equal<T>, rb_tree_tag, 
//~ tree_order_statistics_node_update>;
 
#define ff first
#define ss second
#define pb push_back
#define mp make_pair
#define ub upper_bound
#define lb lower_bound
#define sz(x) (int)x.size()
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(),x.rend()
#define NeedForSpeed ios::sync_with_stdio(0);cin.tie(0);cout.tie(0);
#define vv vector
#define mem(arr, v) memset(arr, v, sizeof arr)
#define int long long
#define degub(x) cout<<#x<<" : "<<x<<"\n"
#define GG cout<<"here"<<endl;
//~ void usaco(string s) { freopen((s+".in").c_str(),"r",stdin);  
	//~ freopen((s+".out").c_str(),"w",stdout); NeedForSpeed } 
 
typedef long long ll;
typedef long double ld;
typedef pair<int, int> pii; 
typedef vector<int> vii;
typedef vector<pii> vpii;
template<class T> bool umin(T& a, const T& b) { return a > b ? a = b, true : false; }
template<class T> bool umax(T& a, const T& b) { return a < b ? a = b, true : false; }
template<int sz> using tut = array<int, sz>;
 
//~ for P. Pankov problems
//~ const int mod = 2021;
//~ const int mod = (119 << 23)+1;
 
const int N = 5e3+5;
const int mod = 1e9+7;
const ll inf = 1e18;
const ld Pi = acos(-1);
const int MX = 1e6+5;
 
#define MULTI 0
int n, m, k, t, q, ans, res, a[N];
int x[N], y[N];
 
bool cmp(tut<3> a, tut<3> b){
	if(a[1] != b[1]) return (a[1] > b[1]);
	return (a[0] < b[0]);
}
 
int dp[N][N];
vpii pp;
int sq(int a) { return a * a; }
 
//~ void dnc(int l, int r, int lx, int rx){
	//~ if(l > r) return;
	//~ int m = (l + r)>>1, op = min(rx, m);
	//~ dp[m][k] = inf;
	//~ for(int i=min(rx, m);i>=lx;i--){
		//~ int in = 0;
		//~ if(pp[i-1].ss >= pp[i].ff) in = sq(pp[i-1].ss - pp[i].ff + 1);
		//~ if(umin(dp[m][k], dp[i-1][k-1] + sq(pp[m].ss - pp[i].ff + 1) - in)) op = i;
	//~ }
	
	//~ dnc(l, m-1, lx, op);
	//~ dnc(m+1, r, op, rx);
//~ }
 
#define i32 int32_t
 
int take_photos(i32 N, i32 M, i32 K, std::vector<i32> r, std::vector<i32> c){
	n = N, m = M, k = K;
	for(int i=1;i<=n;i++){
		x[i] = r[i-1], y[i] = c[i-1];
		if(x[i] > y[i]) swap(x[i], y[i]);
	}
	
	vpii tt;
	for(int i=1;i<=n;i++) tt.pb({x[i], y[i]});
	sort(all(tt), [&](pii a, pii b) { if(a.ff != b.ff) return a.ff < b.ff; return a.ss > b.ss; });
	pp.pb(mp(-1, -1));
	for(auto x : tt) if(x.ss > pp.back().ss) pp.pb(x);
	//~ for(auto x : pp) cout<<x.ff<<" "<<x.ss<<"\n";
	
	n = sz(pp) - 1;
	
	for(int i=1;i<=n;i++) dp[i][0] = inf;

	for(k=1;k<=K;k++){
		for(int i=1;i<=n;i++){
			dp[i][k] = inf;
			for(int j=0;j<i;j++){
				umin(dp[i][k], dp[j][k-1] + sq(pp[i].ss - pp[j+1].ff + 1) - sq(max(0ll, pp[j].ss - pp[j+1].ff + 1)));
			}
		} 
		
		//~ for(int i=1;i<=n;i++) cout<<dp[i][k]<<" ";
		//~ cout<<"\n";
	}
	
	res = inf;
	for(int i=1;i<=K;i++) umin(res, dp[n][i]);
	return res;
}
 
/*

2 6 2
1 4
4 1
 
4 7 2
0 3 
4 6
4 3
4 5

*/

//~ signed main(){
	//~ NeedForSpeed
	//~ i32 n, m, k; cin>>n>>m>>k;
	//~ vv<i32> r, c; 
	//~ for(int i=0;i<n;i++){
		//~ int x, y; cin>>x>>y;
		//~ r.pb(x), c.pb(y);
	//~ }
	
	//~ cout<<take_photos(n, m, k, r, c)<<"\n";
	//~ return 0;
//~ }

• Subtask 1: 4 / 4
• Subtask 2: 12 / 12
• Subtask 3: 9 / 9
• Subtask 4: 0 / 16
• Subtask 5: 0 / 19
• Subtask 6: 0 / 40