Submission #549668

#	Time	Username	Problem	Language	Result	Execution time	Memory
549668		cpp219	Let's Win the Election (JOI22_ho_t3)	C++17	10 / 100	9 ms	364 KiB

Main

#include<bits/stdc++.h>
#define ll long long
#define ld long double
#define fs first
#define sc second
#define debug(y) cout<<y,exit(0)
using namespace std;
typedef pair<ll,ll> LL;
const ll N = 500 + 9;
const ll inf = 1e18 + 7;

ld ans = inf*1.0;
ll n,k,collab;
LL a[N];

bool lf(LL x,LL y){
    return x.sc < y.sc;
}

int main(){
    ios_base::sync_with_stdio(NULL); cin.tie(0); cout.tie(0);
    #define task "tst"
    if (fopen(task".inp","r")){
        freopen(task".inp","r",stdin);
        //freopen(task".out","w",stdout);
    }
    cin>>n>>k;
    for (ll i = 1;i <= n;i++){
        cin>>a[i].fs>>a[i].sc;
        if (a[i].sc == -1) a[i].sc = inf;
        collab += (a[i].sc != -1);
    }
    sort(a + 1,a + n + 1,lf);
    for (ll take = 0;take <= min(k,collab);take++){
        ll man = 1; ld tmp = 0; vector<LL> rm;
        for (ll i = 1;i <= take;i++){
            tmp += (ld)a[i].sc/man; man++;
        }
        for (ll i = take + 1;i <= n;i++) rm.push_back(a[i]);
        sort(rm.begin(),rm.end());
        for (ll i = 0;i < k - take;i++) tmp += (ld) rm[i].fs/man;
        ans = min(ans,tmp); //debug(tmp);
    }
    cout<<fixed<<setprecision(6)<<ans;
}
/// be confident

Compilation message (stderr)

Main.cpp: In function 'int main()':
Main.cpp:24:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   24 |         freopen(task".inp","r",stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 5 / 5
• Subtask 2: 5 / 5
• Subtask 3: 0 / 11
• Subtask 4: 0 / 12
• Subtask 5: 0 / 33
• Subtask 6: 0 / 11
• Subtask 7: 0 / 23