oj.uz

Submission #534267

# Submission time Handle Problem Language Result Execution time Memory
534267 2022-03-08T02:54:41 Z browntoad Let's Win the Election (JOI22_ho_t3) C++14
10 / 100
 1 ms 332 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 pdd pair<double ,double>
#define pii pdd

#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=105;
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);
}

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

bool cmp(pdd x, pdd y){
    if(x.s==-1&&y.s==-1){
        return x.f<y.f;
    }
    if(x.s==-1||y.s==-1){
        return x.s>y.s;
    }
    return x.s<y.s;
}
signed main (){
    IOS();
    cout<<fixed<<setprecision(5);
    int n, k; cin>>n>>k;
    double res=inf;
    vector<pdd> vc(n);
    REP(i,n) cin>>vc[i].f>>vc[i].s;
    sort(ALL(vc), cmp);
    if (vc[0].s==vc[n-1].s&&vc[0].s==-1){
        int res=0;
        REP(i,k){
            res+=vc[i].f;
        }
        cout<<res<<endl;
        return 0;
    }
    int pos=0;
    REP(i,n){
        if (vc[i].s==-1){
            break;
        }
        pos++;
    }
    
    REP(i,min(k+1, pos+1)){
        //cout<<i<<endl;
        double cur=0;
        REP(j,i){
            //cout<<j<<endl;
            //cout<<vc[i].f/(j+1)<<endl;
            cur+=vc[j].f/(0.0+j+1);
            //cout<<cur<<endl;
        }
        //cout<<cur<<endl;
        if (cur==inf||pos+(k-i)-1>=n) continue;
        REP(j, k-i){
            //cout<<j+pos<<endl;
            cur+=vc[pos+j].f/(0.0+i+1);
            //cout<<cur<<endl;
        }
        res=min(res, cur);
    }
    cout<<res<<endl;
}

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 1 ms 308 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 216 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 1 ms 304 KB Output is correct
7 Correct 1 ms 204 KB Output is correct
8 Correct 1 ms 304 KB Output is correct
9 Correct 1 ms 332 KB Output is correct
10 Correct 1 ms 204 KB Output is correct

Subtask #2
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 1 ms 308 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 216 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 1 ms 304 KB Output is correct
7 Correct 1 ms 204 KB Output is correct
8 Correct 1 ms 304 KB Output is correct
9 Correct 1 ms 332 KB Output is correct
10 Correct 1 ms 204 KB Output is correct
11 Correct 1 ms 204 KB Output is correct
12 Correct 1 ms 332 KB Output is correct
13 Correct 1 ms 312 KB Output is correct
14 Correct 1 ms 204 KB Output is correct
15 Correct 1 ms 204 KB Output is correct
16 Correct 1 ms 204 KB Output is correct
17 Correct 1 ms 204 KB Output is correct
18 Correct 1 ms 204 KB Output is correct
19 Correct 1 ms 204 KB Output is correct
20 Correct 1 ms 204 KB Output is correct

Subtask #3
0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Incorrect 1 ms 204 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #4
0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Incorrect 1 ms 204 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #5
0 / 33.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Incorrect 1 ms 204 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #6
0 / 11.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 312 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #7
0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 1 ms 308 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 216 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 1 ms 304 KB Output is correct
7 Correct 1 ms 204 KB Output is correct
8 Correct 1 ms 304 KB Output is correct
9 Correct 1 ms 332 KB Output is correct
10 Correct 1 ms 204 KB Output is correct
11 Correct 1 ms 204 KB Output is correct
12 Correct 1 ms 332 KB Output is correct
13 Correct 1 ms 312 KB Output is correct
14 Correct 1 ms 204 KB Output is correct
15 Correct 1 ms 204 KB Output is correct
16 Correct 1 ms 204 KB Output is correct
17 Correct 1 ms 204 KB Output is correct
18 Correct 1 ms 204 KB Output is correct
19 Correct 1 ms 204 KB Output is correct
20 Correct 1 ms 204 KB Output is correct
21 Correct 1 ms 204 KB Output is correct
22 Incorrect 1 ms 204 KB Output isn't correct
23 Halted 0 ms 0 KB -