Submission #395098

#	Time	Username	Problem	Language	Result	Execution time	Memory
395098		MarcoMeijer	Hiring (IOI09_hiring)	C++14	40 / 100	1593 ms	26864 KiB

hiring

#include <bits/stdc++.h>
using namespace std;
 
// macros
typedef long long ll;
typedef long double ld;
typedef pair<int, int> ii;
typedef pair<ll, ll> lll;
typedef tuple<int, int, int> iii;
typedef vector<int> vi;
typedef vector<ii> vii;
typedef vector<iii> viii;
typedef vector<ll> vll;
typedef vector<lll> vlll;
#define REP(a,b,c) for(int a=int(b); a<int(c); a++)
#define RE(a,c) REP(a,0,c)
#define RE1(a,c) REP(a,1,c+1)
#define REI(a,b,c) REP(a,b,c+1)
#define REV(a,b,c) for(int a=int(c-1); a>=int(b); a--)
#define FOR(a,b) for(auto& a : b)
#define all(a) a.begin(), a.end()
#define INF 1e18
#define EPS 1e-9
#define pb push_back
#define popb pop_back
#define fi first
#define se second
mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count());
 
// input
template<class T> void IN(T& x) {cin >> x;}
template<class H, class... T> void IN(H& h, T&... t) {IN(h); IN(t...); }
 
// output
template<class T1, class T2> void OUT(const pair<T1,T2>& x);
template<class T> void OUT(const vector<T>& x);
template<class T> void OUT(const T& x) {cout << x;}
template<class H, class... T> void OUT(const H& h, const T&... t) {OUT(h); OUT(t...); }
template<class T1, class T2> void OUT(const pair<T1,T2>& x) {OUT(x.fi,' ',x.se);}
template<class T> void OUT(const vector<T>& x) {RE(i,x.size()) OUT(i==0?"":" ",x[i]);}
template<class... T> void OUTL(const T&... t) {OUT(t..., "\n"); }
template<class H> void OUTLS(const H& h) {OUTL(h); }
template<class H, class... T> void OUTLS(const H& h, const T&... t) {OUT(h,' '); OUTLS(t...); }
 
// dp
template<class T> bool ckmin(T&a, T&b) { bool bl = a > b; a = min(a,b); return bl;}
template<class T> bool ckmax(T&a, T&b) { bool bl = a < b; a = max(a,b); return bl;}
 
void program();
int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cout.tie(NULL);
    program();
}
 
 
//===================//
//   begin program   //
//===================//
 
const int MX = 5e5;
const int N = (1<<20);

ll n, w;
ld s[MX], q[MX];
ld fract[MX];
int sq[MX];
vi v;

int getWorkers(ld price) {
    v.clear();
    ld tot = 0.0;
    int ans = 0;
    RE(i,n) if(fract[sq[i]] <= price) {
        tot += price*q[sq[i]];
        if(tot <= ld(w)+EPS) {
            ans++;
            v.pb(sq[i]+1);
        } else {
            break;
        }
    }
    return ans;
}

void program() {
    IN(n,w);
    RE(i,n) IN(s[i],q[i]);
    RE(i,n) fract[i] = s[i]/q[i];

    RE(i,n) sq[i] = i;
    sort(sq,sq+n,[](int i, int j) {return q[i]<q[j];});

    int ans = 0, bestAns = -1;
    ld minFract = 1e9;
    RE(i,n) {
        int res = getWorkers(fract[i]);
        if(res > ans || (res == ans && fract[i] <= minFract)) {
            ans = res;
            bestAns = i;
            minFract = fract[i];
        }
    }
    getWorkers(fract[bestAns]);
    OUTL(ans);
    sort(all(v));
    FOR(u,v) OUTL(u);
}

• Subtask 1: 21 / 30
• Subtask 2: 10 / 28
• Subtask 3: 3 / 6
• Subtask 4: 3 / 6
• Subtask 5: 3 / 6
• Subtask 6: 0 / 6
• Subtask 7: 0 / 6
• Subtask 8: 0 / 6
• Subtask 9: 0 / 6