oj.uz

Submission #747936

# Submission time Handle Problem Language Result Execution time Memory
747936 2023-05-25T07:56:42 Z MilosMilutinovic Let's Win the Election (JOI22_ho_t3) C++14
10 / 100
 236 ms 4272 KB 
#include <bits/stdc++.h>
using namespace std;
const int N = 505;
int n, k, a[N], b[N], ord[N];
double 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] + (double) (a[i] + 0.0) / l);
                if (b[i] != -1) dp[j + 1][l + 1] = min(dp[j + 1][l + 1], ndp[j][l] + (double) (a[i] + b[i] + 0.0) / l);
            }
        }
    }
    double 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:13:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   13 |     scanf("%d%d", &n, &k);
      |     ~~~~~^~~~~~~~~~~~~~~~
Main.cpp:14:39: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   14 |     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 1 ms 340 KB Output is correct
4 Correct 0 ms 340 KB Output is correct
5 Correct 161 ms 4264 KB Output is correct
6 Correct 180 ms 4256 KB Output is correct
7 Correct 166 ms 4180 KB Output is correct
8 Correct 189 ms 4272 KB Output is correct
9 Correct 177 ms 4268 KB Output is correct
10 Correct 177 ms 4260 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 1 ms 340 KB Output is correct
4 Correct 0 ms 340 KB Output is correct
5 Correct 161 ms 4264 KB Output is correct
6 Correct 180 ms 4256 KB Output is correct
7 Correct 166 ms 4180 KB Output is correct
8 Correct 189 ms 4272 KB Output is correct
9 Correct 177 ms 4268 KB Output is correct
10 Correct 177 ms 4260 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 222 ms 4260 KB Output is correct
13 Correct 214 ms 4180 KB Output is correct
14 Correct 172 ms 4260 KB Output is correct
15 Correct 236 ms 4256 KB Output is correct
16 Correct 211 ms 4260 KB Output is correct
17 Correct 182 ms 4256 KB Output is correct
18 Correct 226 ms 4180 KB Output is correct
19 Correct 209 ms 4180 KB Output is correct
20 Correct 183 ms 4264 KB Output is correct

Subtask #3
0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 0 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 1 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 1 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 0 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 1 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 1 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 0 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 1 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 230 ms 4256 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 1 ms 340 KB Output is correct
4 Correct 0 ms 340 KB Output is correct
5 Correct 161 ms 4264 KB Output is correct
6 Correct 180 ms 4256 KB Output is correct
7 Correct 166 ms 4180 KB Output is correct
8 Correct 189 ms 4272 KB Output is correct
9 Correct 177 ms 4268 KB Output is correct
10 Correct 177 ms 4260 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 222 ms 4260 KB Output is correct
13 Correct 214 ms 4180 KB Output is correct
14 Correct 172 ms 4260 KB Output is correct
15 Correct 236 ms 4256 KB Output is correct
16 Correct 211 ms 4260 KB Output is correct
17 Correct 182 ms 4256 KB Output is correct
18 Correct 226 ms 4180 KB Output is correct
19 Correct 209 ms 4180 KB Output is correct
20 Correct 183 ms 4264 KB Output is correct
21 Correct 1 ms 340 KB Output is correct
22 Correct 0 ms 340 KB Output is correct
23 Correct 1 ms 340 KB Output is correct
24 Correct 0 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 1 ms 340 KB Output isn't correct
30 Halted 0 ms 0 KB -