oj.uz

Submission #703487

# Submission time Handle Problem Language Result Execution time Memory
703487 2023-02-27T13:45:12 Z niter Let's Win the Election (JOI22_ho_t3) C++14
10 / 100
 38 ms 308 KB 
#include <bits/stdc++.h>
#define loop(i,a,b) for(int i=a;i<b;i++)
#define pii pair<int,int>
#define ff first
#define ss second
#define mp make_pair
#define pb push_back
#define STL(i, x) for(auto &i:x) cout << i << " "; cout << "\n";
#define iNf 2147483647
using namespace std;

ostream& operator<<(ostream &os, pii XXX){
    cout << "[" << XXX.ff << ", " << XXX.ss << "]";
}
void db(){
    cout << "\n";
}
template<class T, class ...U>
void db(T XXX, U ...YYY){
    cout << XXX;  db(YYY...);
}

bool cmp(pii &XXX, pii &YYY){
    return ((XXX.ff - YYY.ff) / 2 > (XXX.ss > YYY.ss));
}
bool cmp_ff(pii &XXX, pii &YYY){
    return (XXX.ff != YYY.ff) ? (XXX.ff < YYY.ff) : (XXX.ss < YYY.ss);
}
bool cmp_ss(pii &XXX, pii &YYY){
    return (XXX.ss != YYY.ss) ? (XXX.ss < YYY.ss) : (XXX.ff < YYY.ff);
}

int main(){
    int n, k;
    cin >> n >> k;
    int a[505], b[505];
    vector<pii> org(n), dp;
    loop(i,0,n){
        cin >> a[i] >> b[i];
        if(b[i] == -1)
            b[i] = iNf;
        org[i] = mp(a[i], b[i]);
    }
    long double ans = (1e300), tmp_ans;
    int tmp_get, tmp_now;
    sort(org.begin(), org.end());
//    STL(i, org);
    loop(i,0,k+1){
        dp = org;
        tmp_ans = 0;
        tmp_get = 0;
        tmp_now = 1;
        loop(j,0,i){
            if(dp[j].ss == iNf) break;
            tmp_ans += (long double)dp[j].ss / tmp_now;
            dp[j].ff = iNf;
            dp[j].ss = iNf;
            tmp_get++;
            tmp_now++;
        }
//        STL(i, dp);
//        db(tmp_ans);
        sort(dp.begin(), dp.end(), cmp_ff);
        loop(j,0,n){
            if(tmp_get == k){
                ans = min(ans, tmp_ans);
                break;
            }
            tmp_ans += (long double)dp[j].ff / tmp_now;
            tmp_get++;
        }
        if(tmp_get == k)
            ans = min(ans, tmp_ans);
    }

    sort(org.begin(), org.end(), cmp_ss);
//    STL(i, org);
    loop(i,0,k+1){
        dp = org;
        tmp_ans = 0;
        tmp_get = 0;
        tmp_now = 1;
        loop(j,0,i){
            if(dp[j].ss == iNf) break;
            tmp_ans += (long double)dp[j].ss / tmp_now;
            dp[j].ff = iNf;
            dp[j].ss = iNf;
            tmp_get++;
            tmp_now++;
        }
        sort(dp.begin(), dp.end(), cmp_ff);
        loop(j,0,n){
            if(tmp_get == k){
                ans = min(ans, tmp_ans);
                break;
            }
            tmp_ans += (long double)dp[j].ff / tmp_now;
            tmp_get++;
        }
        if(tmp_get == k)
            ans = min(ans, tmp_ans);
    }

    cout << fixed << setprecision(10) << ans << "\n";
    return 0;
}
/*
3
3
1 5
2 3
4 5
*/
/*
2 2
9 10
5 9
*/

Compilation message

Main.cpp: In function 'std::ostream& operator<<(std::ostream&, std::pair<int, int>)':
Main.cpp:14:1: warning: no return statement in function returning non-void [-Wreturn-type]
   14 | }
      | ^

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 3 ms 212 KB Output is correct
6 Correct 5 ms 212 KB Output is correct
7 Correct 8 ms 308 KB Output is correct
8 Correct 13 ms 304 KB Output is correct
9 Correct 18 ms 212 KB Output is correct
10 Correct 8 ms 212 KB Output is correct

Subtask #2
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 3 ms 212 KB Output is correct
6 Correct 5 ms 212 KB Output is correct
7 Correct 8 ms 308 KB Output is correct
8 Correct 13 ms 304 KB Output is correct
9 Correct 18 ms 212 KB Output is correct
10 Correct 8 ms 212 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 7 ms 212 KB Output is correct
13 Correct 6 ms 300 KB Output is correct
14 Correct 6 ms 304 KB Output is correct
15 Correct 15 ms 300 KB Output is correct
16 Correct 25 ms 212 KB Output is correct
17 Correct 16 ms 300 KB Output is correct
18 Correct 29 ms 292 KB Output is correct
19 Correct 23 ms 300 KB Output is correct
20 Correct 38 ms 212 KB Output is correct

Subtask #3
0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Incorrect 0 ms 212 KB Output isn't correct
10 Halted 0 ms 0 KB -

Subtask #4
0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Incorrect 0 ms 212 KB Output isn't correct
10 Halted 0 ms 0 KB -

Subtask #5
0 / 33.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Incorrect 0 ms 212 KB Output isn't correct
10 Halted 0 ms 0 KB -

Subtask #6
0 / 11.0

# Verdict Execution time Memory Grader output
1 Incorrect 26 ms 300 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #7
0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 3 ms 212 KB Output is correct
6 Correct 5 ms 212 KB Output is correct
7 Correct 8 ms 308 KB Output is correct
8 Correct 13 ms 304 KB Output is correct
9 Correct 18 ms 212 KB Output is correct
10 Correct 8 ms 212 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 7 ms 212 KB Output is correct
13 Correct 6 ms 300 KB Output is correct
14 Correct 6 ms 304 KB Output is correct
15 Correct 15 ms 300 KB Output is correct
16 Correct 25 ms 212 KB Output is correct
17 Correct 16 ms 300 KB Output is correct
18 Correct 29 ms 292 KB Output is correct
19 Correct 23 ms 300 KB Output is correct
20 Correct 38 ms 212 KB Output is correct
21 Correct 1 ms 212 KB Output is correct
22 Correct 0 ms 212 KB Output is correct
23 Correct 1 ms 212 KB Output is correct
24 Correct 1 ms 212 KB Output is correct
25 Correct 1 ms 212 KB Output is correct
26 Correct 1 ms 212 KB Output is correct
27 Correct 1 ms 212 KB Output is correct
28 Correct 1 ms 212 KB Output is correct
29 Incorrect 0 ms 212 KB Output isn't correct
30 Halted 0 ms 0 KB -