oj.uz

답안 #641232

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
641232 2022-09-16T08:43:52 Z browntoad Let's Win the Election (JOI22_ho_t3) C++14
10 / 100
 1643 ms 8388 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;
long double dp[maxn][maxn], sf[maxn][maxn];
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;
}
 
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);
    REP(i, maxn){
        REP(j, maxn){
            if (j==0) sf[i][j]=0;
            else sf[i][j]=iinf;
        }
    }
    RREP(i, n){
        vector<int> cur;
        FOR(j, i, n){
            cur.pb(vc[j].f);
        }
        sort(ALL(cur));
        REP1(j, k){
            if (j>SZ(cur)) break;
            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]=iinf;
            }
        }
        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==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)):(0.0+iinf)));
            }
        }
        FOR(i, t-1, n){
            res=min(res, dp[i][t]+sf[i+1][k-t]/(t+1));
        }
    }
    cout<<res<<endl;
 
}

Subtask #1
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 4308 KB Output is correct
2 Correct 3 ms 4308 KB Output is correct
3 Correct 2 ms 4308 KB Output is correct
4 Correct 2 ms 4308 KB Output is correct
5 Correct 20 ms 6652 KB Output is correct
6 Correct 96 ms 7244 KB Output is correct
7 Correct 362 ms 8260 KB Output is correct
8 Correct 801 ms 8316 KB Output is correct
9 Correct 1399 ms 8272 KB Output is correct
10 Correct 701 ms 8328 KB Output is correct

Subtask #2
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 4308 KB Output is correct
2 Correct 3 ms 4308 KB Output is correct
3 Correct 2 ms 4308 KB Output is correct
4 Correct 2 ms 4308 KB Output is correct
5 Correct 20 ms 6652 KB Output is correct
6 Correct 96 ms 7244 KB Output is correct
7 Correct 362 ms 8260 KB Output is correct
8 Correct 801 ms 8316 KB Output is correct
9 Correct 1399 ms 8272 KB Output is correct
10 Correct 701 ms 8328 KB Output is correct
11 Correct 2 ms 4308 KB Output is correct
12 Correct 155 ms 7464 KB Output is correct
13 Correct 146 ms 7436 KB Output is correct
14 Correct 144 ms 7464 KB Output is correct
15 Correct 817 ms 8276 KB Output is correct
16 Correct 792 ms 8388 KB Output is correct
17 Correct 730 ms 8272 KB Output is correct
18 Correct 1627 ms 8276 KB Output is correct
19 Correct 1570 ms 8276 KB Output is correct
20 Correct 1431 ms 8272 KB Output is correct

Subtask #3
0 / 11.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 4308 KB Output is correct
2 Correct 3 ms 4296 KB Output is correct
3 Correct 2 ms 4308 KB Output is correct
4 Correct 2 ms 4308 KB Output is correct
5 Correct 3 ms 4308 KB Output is correct
6 Correct 3 ms 4308 KB Output is correct
7 Correct 3 ms 4312 KB Output is correct
8 Correct 3 ms 4308 KB Output is correct
9 Incorrect 3 ms 4308 KB Output isn't correct
10 Halted 0 ms 0 KB -

Subtask #4
0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 4308 KB Output is correct
2 Correct 3 ms 4296 KB Output is correct
3 Correct 2 ms 4308 KB Output is correct
4 Correct 2 ms 4308 KB Output is correct
5 Correct 3 ms 4308 KB Output is correct
6 Correct 3 ms 4308 KB Output is correct
7 Correct 3 ms 4312 KB Output is correct
8 Correct 3 ms 4308 KB Output is correct
9 Incorrect 3 ms 4308 KB Output isn't correct
10 Halted 0 ms 0 KB -

Subtask #5
0 / 33.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 4308 KB Output is correct
2 Correct 3 ms 4296 KB Output is correct
3 Correct 2 ms 4308 KB Output is correct
4 Correct 2 ms 4308 KB Output is correct
5 Correct 3 ms 4308 KB Output is correct
6 Correct 3 ms 4308 KB Output is correct
7 Correct 3 ms 4312 KB Output is correct
8 Correct 3 ms 4308 KB Output is correct
9 Incorrect 3 ms 4308 KB Output isn't correct
10 Halted 0 ms 0 KB -

Subtask #6
0 / 11.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 1643 ms 8344 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #7
0 / 23.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 4308 KB Output is correct
2 Correct 3 ms 4308 KB Output is correct
3 Correct 2 ms 4308 KB Output is correct
4 Correct 2 ms 4308 KB Output is correct
5 Correct 20 ms 6652 KB Output is correct
6 Correct 96 ms 7244 KB Output is correct
7 Correct 362 ms 8260 KB Output is correct
8 Correct 801 ms 8316 KB Output is correct
9 Correct 1399 ms 8272 KB Output is correct
10 Correct 701 ms 8328 KB Output is correct
11 Correct 2 ms 4308 KB Output is correct
12 Correct 155 ms 7464 KB Output is correct
13 Correct 146 ms 7436 KB Output is correct
14 Correct 144 ms 7464 KB Output is correct
15 Correct 817 ms 8276 KB Output is correct
16 Correct 792 ms 8388 KB Output is correct
17 Correct 730 ms 8272 KB Output is correct
18 Correct 1627 ms 8276 KB Output is correct
19 Correct 1570 ms 8276 KB Output is correct
20 Correct 1431 ms 8272 KB Output is correct
21 Correct 3 ms 4308 KB Output is correct
22 Correct 3 ms 4296 KB Output is correct
23 Correct 2 ms 4308 KB Output is correct
24 Correct 2 ms 4308 KB Output is correct
25 Correct 3 ms 4308 KB Output is correct
26 Correct 3 ms 4308 KB Output is correct
27 Correct 3 ms 4312 KB Output is correct
28 Correct 3 ms 4308 KB Output is correct
29 Incorrect 3 ms 4308 KB Output isn't correct
30 Halted 0 ms 0 KB -