Submission #618114

#	Time	Username	Problem	Language	Result	Execution time	Memory
618114		rrrr10000	Aliens (IOI16_aliens)	C++14	25 / 100	2079 ms	6996 KiB

aliens

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef pair<ll,ll> P;
typedef vector<ll> vi;
typedef vector<vi> vvi;
typedef vector<P> vp;
typedef vector<vp> vvp;
typedef vector<bool> vb;
#define rep(i,n) for(ll i=0;i<(ll)(n);i++)
#define REP(i,k,n) for(ll i=(ll)(k);i<(ll)(n);i++)
#define all(a) a.begin(),a.end()
#define lb(v,k) (lower_bound(all(v),k)-v.begin())
#define fi first
#define se second
#define pb emplace_back
template<class T> void out(T a){cout<<a<<endl;}
template<class T> void outv(T v){rep(i,v.size()){if(i)cout<<' ';cout<<v[i];}cout<<endl;}
template<class T> bool chmin(T&a,T b){if(a>b){a=b;return true;}return false;}
template<class T> bool chmax(T&a,T b){if(a<b){a=b;return true;}return false;}
const ll inf=1001001001001001001;

long long take_photos(int n, int m, int K, std::vector<int> r, std::vector<int> c) {
    vp srt(n);
    rep(i,n)srt[i]=P(max(r[i],c[i]),min(r[i],c[i]));
    sort(all(srt));
    vp v;v.pb(-1,-1);
    for(auto x:srt){
        while(v.size()&&v.back().fi>=x.se)v.pop_back();
        if(v.size()==0||v.back().se<x.fi)v.pb(x.se,x.fi);
    }
    n=v.size();
    vvi dp(n,vi(K+1,inf));
    dp[0][0]=0;
    rep(i,n)rep(j,K)if(dp[i][j]!=inf){
        chmin(dp[i][j+1],dp[i][j]);
        REP(t,i+1,n)chmin(dp[t][j+1],dp[i][j]+(v[t].se-v[i+1].fi+1)*(v[t].se-v[i+1].fi+1)-max(0ll,v[i].se-v[i+1].fi+1)*max(0ll,v[i].se-v[i+1].fi+1));
    }
    return dp[n-1][K];
}

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