Submission #534795

#	Time	Username	Problem	Language	Result	Execution time	Memory
534795		i_am_noob	Let's Win the Election (JOI22_ho_t3)	C++17	100 / 100	823 ms	993768 KiB

Main

#include <bits/stdc++.h>
using namespace std;
#pragma GCC optimize("Ofast,unroll-loops")

#define ll long long
#define int ll
#define ull unsigned ll
#define ld long double
#define rep(a) rep1(i,a)
#define rep1(i,a) rep2(i,0,a)
#define rep2(i,b,a) for(int i=(b); i<((int)(a)); i++)
#define rep3(i,b,a) for(int i=(b); i>=((int)(a)); i--)
#define chkmin(a,b) (a=min(a,b))
#define chkmax(a,b) (a=max(a,b))
#define all(a) a.begin(),a.end()
#define pii pair<int,int>
#define pb push_back
//#define inf 1010000000
#define inf 4000000000000000000
#define eps 1e-9
#define sz(a) ((int)a.size())
#define pow2(x) (1ll<<(x))
#define ceiling(a,b) (((a)+(b)-1)/(b))
#define print0(a) cout << (a) << ' '
#define ykh mt19937 rng(chrono::steady_clock::now().time_since_epoch().count())
#ifdef i_am_noob
#define bug(...) cerr << "#" << __LINE__ << ' ' << #__VA_ARGS__ << "- ", _do(__VA_ARGS__)
template<typename T> void _do(T && x) {cerr << x << endl;}
template<typename T, typename ...S> void _do(T && x, S&&...y) {cerr << x << ", "; _do(y...);}
#else
#define bug(...) 777771449
#endif

const int mod=1000000007;
const int maxn=505,maxm=5,maxk=7777714;

//i_am_noob
int n,k;
pair<double,double> a[maxn];
double res=inf;
double dp[maxn][maxn][maxn];

bool cmp(pair<double,double> x, pair<double,double> y){return x.second<y.second;}

void orzck(){
    cin >> n >> k;
    rep(n){
        int x,y;
        cin >> x >> y;
        if(y==-1) y=1e9;
        a[i].first=x,a[i].second=y;
    }
    sort(a,a+n,cmp);
    rep(n+1) rep1(j,n+1) dp[i][0][j]=inf;
    rep(n+1) dp[i][0][0]=0;
    rep(n+1){
        rep2(j,1,n+1) rep1(k,i+1){
            dp[i][j][k]=inf;
            if(k>0) chkmin(dp[i][j][k],dp[i][j-1][k-1]+a[j-1].second/k);
            chkmin(dp[i][j][k],dp[i][j-1][k]+a[j-1].first/(i+1));
        }
    }
    bug("de");
    multiset<double> st;
    double tot=0;
    rep3(i,n,0){
        if(i<n) st.insert(a[i].first);
        if(i>k) continue;
        if(i<k){
            tot+=*st.begin();
            st.erase(st.begin());
        }
        bug(i,tot);
        rep1(j,i+1){
            chkmin(res,dp[j][i][j]+tot/(j+1));
            //bug(i,j,dp[j][i][j]+tot/(j+1));
        }
    }
    cout << fixed << setprecision(12);
    cout << res << "\n";
}

signed main(){
    ios_base::sync_with_stdio(0),cin.tie(0);
    orzck();
    return 0;
}

Compilation message (stderr)

Main.cpp: In function 'void orzck()':
Main.cpp:31:18: warning: statement has no effect [-Wunused-value]
   31 | #define bug(...) 777771449
      |                  ^~~~~~~~~
Main.cpp:63:5: note: in expansion of macro 'bug'
   63 |     bug("de");
      |     ^~~
Main.cpp:31:18: warning: statement has no effect [-Wunused-value]
   31 | #define bug(...) 777771449
      |                  ^~~~~~~~~
Main.cpp:73:9: note: in expansion of macro 'bug'
   73 |         bug(i,tot);
      |         ^~~

• Subtask 1: 5 / 5
• Subtask 2: 5 / 5
• Subtask 3: 11 / 11
• Subtask 4: 12 / 12
• Subtask 5: 33 / 33
• Subtask 6: 11 / 11
• Subtask 7: 23 / 23