oj.uz

Submission #747940

# Submission time Handle Problem Language Result Execution time Memory
747940 2023-05-25T07:59:29 Z MilosMilutinovic Let's Win the Election (JOI22_ho_t3) C++14
10 / 100
 756 ms 8244 KB 
#include <bits/stdc++.h>
using namespace std;
#define ldb long double
const int N = 505;
int n, k, a[N], b[N], ord[N];
ldb dp[N][N], ndp[N][N];
bool cmp(int i, int j) {
    int si = a[i] + (b[i] == -1 ? 1e8 : b[i]);
    int sj = a[j] + (b[j] == -1 ? 1e8 : b[j]);
    if (si != sj) return si < sj;
    else return a[i] > a[j];
}
int main() {
    scanf("%d%d", &n, &k);
    for (int i = 1; i <= n; i++) scanf("%d%d", &a[i], &b[i]), b[i] = (b[i] == -1 ? -1 : b[i] - a[i]);
    for (int i = 1; i <= n; i++) ord[i] = i;
    sort(ord + 1, ord + n + 1, cmp);
    for (int i = 0; i <= n + 1; i++)
        for (int j = 0; j <= n + 1; j++)
            dp[i][j] = 1e9;
    dp[0][1] = 0;
    for (int _i = 1; _i <= n; _i++) {
        int i = ord[_i];
        for (int j = 0; j <= n + 1; j++)
            for (int l = 0; l <= n + 1; l++)
                ndp[j][l] = dp[j][l];
        for (int j = 0; j <= n + 1; j++) {
            for (int l = 0; l <= n + 1; l++) {
                if (ndp[j][l] > 1e8) continue;
                dp[j + 1][l] = min(dp[j + 1][l], ndp[j][l] + (ldb) (a[i] + 0.0) / l);
                if (b[i] != -1) dp[j + 1][l + 1] = min(dp[j + 1][l + 1], ndp[j][l] + (ldb) (a[i] + b[i] + 0.0) / l);
            }
        }
    }
    ldb ans = 1e9;
    for (int i = 0; i <= n + 1; i++) ans = min(ans, dp[k][i]);
    printf("%.20Lf", ans);
    return 0;
}

Compilation message

Main.cpp: In function 'int main()':
Main.cpp:14:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   14 |     scanf("%d%d", &n, &k);
      |     ~~~~~^~~~~~~~~~~~~~~~
Main.cpp:15:39: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   15 |     for (int i = 1; i <= n; i++) scanf("%d%d", &a[i], &b[i]), b[i] = (b[i] == -1 ? -1 : b[i] - a[i]);
      |                                  ~~~~~^~~~~~~~~~~~~~~~~~~~~~

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 0 ms 340 KB Output is correct
5 Correct 455 ms 8224 KB Output is correct
6 Correct 427 ms 8224 KB Output is correct
7 Correct 435 ms 8224 KB Output is correct
8 Correct 504 ms 8228 KB Output is correct
9 Correct 457 ms 8228 KB Output is correct
10 Correct 464 ms 8228 KB Output is correct

Subtask #2
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 0 ms 340 KB Output is correct
5 Correct 455 ms 8224 KB Output is correct
6 Correct 427 ms 8224 KB Output is correct
7 Correct 435 ms 8224 KB Output is correct
8 Correct 504 ms 8228 KB Output is correct
9 Correct 457 ms 8228 KB Output is correct
10 Correct 464 ms 8228 KB Output is correct
11 Correct 0 ms 340 KB Output is correct
12 Correct 692 ms 8228 KB Output is correct
13 Correct 570 ms 8228 KB Output is correct
14 Correct 496 ms 8236 KB Output is correct
15 Correct 742 ms 8224 KB Output is correct
16 Correct 572 ms 8224 KB Output is correct
17 Correct 489 ms 8224 KB Output is correct
18 Correct 668 ms 8244 KB Output is correct
19 Correct 570 ms 8228 KB Output is correct
20 Correct 494 ms 8232 KB Output is correct

Subtask #3
0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 0 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 0 ms 340 KB Output is correct
8 Correct 0 ms 340 KB Output is correct
9 Incorrect 0 ms 340 KB Output isn't correct
10 Halted 0 ms 0 KB -

Subtask #4
0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 0 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 0 ms 340 KB Output is correct
8 Correct 0 ms 340 KB Output is correct
9 Incorrect 0 ms 340 KB Output isn't correct
10 Halted 0 ms 0 KB -

Subtask #5
0 / 33.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 0 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 0 ms 340 KB Output is correct
8 Correct 0 ms 340 KB Output is correct
9 Incorrect 0 ms 340 KB Output isn't correct
10 Halted 0 ms 0 KB -

Subtask #6
0 / 11.0

# Verdict Execution time Memory Grader output
1 Incorrect 756 ms 8224 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 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 0 ms 340 KB Output is correct
5 Correct 455 ms 8224 KB Output is correct
6 Correct 427 ms 8224 KB Output is correct
7 Correct 435 ms 8224 KB Output is correct
8 Correct 504 ms 8228 KB Output is correct
9 Correct 457 ms 8228 KB Output is correct
10 Correct 464 ms 8228 KB Output is correct
11 Correct 0 ms 340 KB Output is correct
12 Correct 692 ms 8228 KB Output is correct
13 Correct 570 ms 8228 KB Output is correct
14 Correct 496 ms 8236 KB Output is correct
15 Correct 742 ms 8224 KB Output is correct
16 Correct 572 ms 8224 KB Output is correct
17 Correct 489 ms 8224 KB Output is correct
18 Correct 668 ms 8244 KB Output is correct
19 Correct 570 ms 8228 KB Output is correct
20 Correct 494 ms 8232 KB Output is correct
21 Correct 0 ms 340 KB Output is correct
22 Correct 0 ms 340 KB Output is correct
23 Correct 0 ms 340 KB Output is correct
24 Correct 1 ms 340 KB Output is correct
25 Correct 0 ms 340 KB Output is correct
26 Correct 1 ms 340 KB Output is correct
27 Correct 0 ms 340 KB Output is correct
28 Correct 0 ms 340 KB Output is correct
29 Incorrect 0 ms 340 KB Output isn't correct
30 Halted 0 ms 0 KB -