Submission #848331

#	Time	Username	Problem	Language	Result	Execution time	Memory
848331		SUNWOOOOOOOO	Let's Win the Election (JOI22_ho_t3)	C++17	11 / 100	115 ms	2592 KiB

Main

#include <bits/stdc++.h>
using namespace std;
const int mxN = 505;
array <int, 2> A[mxN]; // {B, A}
double dp[mxN][mxN]; // current state, no of selected collabs
int n, k;

void dpinit()
{
    for (int i = 0; i <= n; i++) for (int j = 0; j <= n; j++) dp[i][j] = 2e9;
}

int main()
{
    scanf("%d %d", &n, &k);
    for (int i = 1; i <= n; i++) scanf("%d %d", &A[i][1], &A[i][0]);
    sort(A + 1, A + n + 1);

    // n == k
    double ans = 2e9;
    for (int x = 0; x <= n; x++){ // number of collabs
        dpinit();
        dp[0][0] = 0;
        for (int i = 1; i <= n; i++){
            for (int j = 0; j <= min(i, x); j++){
                double val = 2e9;
                if (j) val = min(val, dp[i - 1][j - 1] + 1.0 * A[i][0] / j);
                val = min(val, dp[i - 1][j] + 1.0 * A[i][1] / (x + 1));
                dp[i][j] = val;
            }
        }
        ans = min(ans, dp[n][x]);
    }

    printf("%lf\n", ans);
    
    return 0;
}

Compilation message (stderr)

Main.cpp: In function 'int main()':
Main.cpp:15:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   15 |     scanf("%d %d", &n, &k);
      |     ~~~~~^~~~~~~~~~~~~~~~~
Main.cpp:16:39: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   16 |     for (int i = 1; i <= n; i++) scanf("%d %d", &A[i][1], &A[i][0]);
      |                                  ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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