oj.uz

답안 #638618

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
638618 2022-09-06T14:15:46 Z browntoad Let's Win the Election (JOI22_ho_t3) C++14
10 / 100
 1327 ms 7932 KB 
#include <bits/stdc++.h>
#pragma GCC optimize ("Ofast", "unroll-loops")
using namespace std;
#define ll long long
#define int ll
#define FOR(i,a,b) for (int i = (a); i<(b); i++)
#define REP(i,n) FOR(i,0,n)
#define REP1(i,n) FOR(i,1,n+1)
#define RREP(i,n) for (int i=(n)-1; i>=0; i--)
#define f first
#define s second
#define pb push_back
#define ALL(x) x.begin(),x.end()
#define SZ(x) (int)(x.size())
#define SQ(x) (x)*(x)
#define pii pair<int, int>
#define pdd pair<double ,double>
#define pcc pair<char, char> 
#define endl '\n'
//#define TOAD
#ifdef TOAD
#define bug(x) cerr<<__LINE__<<": "<<#x<<" is "<<x<<endl
#define IOS()
#else
#define bug(...)
#define IOS() ios::sync_with_stdio(0), cin.tie(0), cout.tie(0)
#endif

const ll inf = 1ll<<60;
const int iinf=2147483647;
const ll mod = 1e9+7;
const ll maxn=505;
const double PI=acos(-1);

ll pw(ll x, ll p, ll m=mod){
    ll ret=1;
    while (p>0){
        if (p&1){
            ret*=x;
            ret%=m;
        }
        x*=x;
        x%=m;
        p>>=1;
    }
    return ret;
}

ll inv(ll a, ll m=mod){
    return pw(a,m-2);
}

//=======================================================================================

int n, k;
vector<pii> vc;
bool cmp(pii a, pii b){
    if (a.s==-1&&b.s==-1){
        return a.f<b.f;
    }
    if (a.s==-1||b.s==-1){
        return a.s>b.s;
    }
    return a.s<b.s;
}

long double dp[maxn][maxn], sf[maxn][maxn];
signed main (){
    IOS();
    cout<<fixed<<setprecision(15);
    cin>>n>>k;
    REP(i, n){
        int x, y; cin>>x>>y;
        vc.pb({x, y});
    }
    sort(ALL(vc), cmp);
    RREP(i, n){
        vector<int> cur;
        FOR(j, i, n){
            cur.pb(vc[j].f);
        }
        sort(ALL(cur));
        REP(j, k+1){
            if (j>SZ(cur)) break;
            if (j==0) sf[i][j]=0.0;
            else sf[i][j]=sf[i][j-1]+cur[j-1];
        }
    }
    long double res=sf[0][k];
    REP1(t, k){
        REP(i, n){
            REP(j, t+1){
                dp[i][j]=inf;
            }
        }
        REP(i, n){
            if (i==0){
                dp[i][0]=(0.0+vc[i].f)/(t+1);
                if (vc[i].s!=-1) dp[i][1]=(0.0+vc[i].s);
                continue;
            }
            REP(j, t+1){
                if (j>i+1) break;
                if (j==0){
                    dp[i][0]=dp[i-1][0]+(0.0+vc[i].f)/(t+1);
                }
                else dp[i][j]=min(dp[i-1][j]+(0.0+vc[i].f)/(t+1), ((vc[i].s!=-1)?(dp[i-1][j-1]+(0.0+vc[i].s)/(j)):inf));
            }
        }
        REP(i, n){
            if (i+1<t){
                continue;
            }
            if (n-i-1<k-t){
                continue;
            }
            res=min(res, dp[i][t]+sf[i+1][k-t]/(t+1));
        }
        //res=min(res, dp[t-1][t]+(0.0+sf[t][k-t])/(t+1)); // 0 base
    }
    cout<<res<<endl;

}

Subtask #1
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 0 ms 340 KB Output is correct
5 Correct 21 ms 5132 KB Output is correct
6 Correct 99 ms 6104 KB Output is correct
7 Correct 337 ms 7852 KB Output is correct
8 Correct 700 ms 7824 KB Output is correct
9 Correct 1128 ms 7776 KB Output is correct
10 Correct 619 ms 7740 KB Output is correct

Subtask #2
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 0 ms 340 KB Output is correct
5 Correct 21 ms 5132 KB Output is correct
6 Correct 99 ms 6104 KB Output is correct
7 Correct 337 ms 7852 KB Output is correct
8 Correct 700 ms 7824 KB Output is correct
9 Correct 1128 ms 7776 KB Output is correct
10 Correct 619 ms 7740 KB Output is correct
11 Correct 0 ms 340 KB Output is correct
12 Correct 158 ms 6416 KB Output is correct
13 Correct 149 ms 6440 KB Output is correct
14 Correct 139 ms 6480 KB Output is correct
15 Correct 712 ms 7816 KB Output is correct
16 Correct 659 ms 7712 KB Output is correct
17 Correct 633 ms 7764 KB Output is correct
18 Correct 1327 ms 7932 KB Output is correct
19 Correct 1200 ms 7780 KB Output is correct
20 Correct 1133 ms 7772 KB Output is correct

Subtask #3
0 / 11.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 336 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 292 KB Output is correct
5 Correct 1 ms 328 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Incorrect 1 ms 328 KB Output isn't correct
10 Halted 0 ms 0 KB -

Subtask #4
0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 336 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 292 KB Output is correct
5 Correct 1 ms 328 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Incorrect 1 ms 328 KB Output isn't correct
10 Halted 0 ms 0 KB -

Subtask #5
0 / 33.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 336 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 292 KB Output is correct
5 Correct 1 ms 328 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Incorrect 1 ms 328 KB Output isn't correct
10 Halted 0 ms 0 KB -

Subtask #6
0 / 11.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 1317 ms 7840 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #7
0 / 23.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 0 ms 340 KB Output is correct
5 Correct 21 ms 5132 KB Output is correct
6 Correct 99 ms 6104 KB Output is correct
7 Correct 337 ms 7852 KB Output is correct
8 Correct 700 ms 7824 KB Output is correct
9 Correct 1128 ms 7776 KB Output is correct
10 Correct 619 ms 7740 KB Output is correct
11 Correct 0 ms 340 KB Output is correct
12 Correct 158 ms 6416 KB Output is correct
13 Correct 149 ms 6440 KB Output is correct
14 Correct 139 ms 6480 KB Output is correct
15 Correct 712 ms 7816 KB Output is correct
16 Correct 659 ms 7712 KB Output is correct
17 Correct 633 ms 7764 KB Output is correct
18 Correct 1327 ms 7932 KB Output is correct
19 Correct 1200 ms 7780 KB Output is correct
20 Correct 1133 ms 7772 KB Output is correct
21 Correct 1 ms 336 KB Output is correct
22 Correct 1 ms 340 KB Output is correct
23 Correct 1 ms 340 KB Output is correct
24 Correct 1 ms 292 KB Output is correct
25 Correct 1 ms 328 KB Output is correct
26 Correct 1 ms 340 KB Output is correct
27 Correct 1 ms 340 KB Output is correct
28 Correct 1 ms 340 KB Output is correct
29 Incorrect 1 ms 328 KB Output isn't correct
30 Halted 0 ms 0 KB -