oj.uz

Submission #804534

# Submission time Handle Problem Language Result Execution time Memory
804534 2023-08-03T09:37:19 Z MilosMilutinovic Let's Win the Election (JOI22_ho_t3) C++14
10 / 100
 310 ms 4308 KB 
#include <bits/stdc++.h>

using namespace std;

#define ldb double

const int MAX = 505;
const ldb inf = (ldb) 1e9;

int n, m, a[MAX], b[MAX];
int order[MAX];
ldb dp[2][MAX][MAX];

bool cmp(int i, int j) {
    int vi = (b[i] == -1 ? (int) 1e9 : b[i]);
    int vj = (b[j] == -1 ? (int) 1e9 : b[j]);
    return vi < vj;
}

int main() {
    scanf("%d%d", &n, &m);
    for (int i = 1; i <= n; i++) {
        scanf("%d%d", &a[i], &b[i]);
    }
    for (int i = 1; i <= n; i++) {
        order[i] = i;
    }
    sort(order + 1, order + 1 + n, cmp);
    for (int k = 0; k < 2; k++) {
        for (int i = 0; i <= n + 1; i++) {
            for (int j = 0; j <= n; j++) {
                dp[k][i][j] = inf;
            }
        }
    }
    dp[0][1][0] = 0;
    for (int _i = 1; _i <= n; _i++) {
        int i = order[_i];
        int f = (_i % 2), p = 1 - f;
        for (int j = 0; j <= n + 1; j++) {
            for (int k = 0; k <= n; k++) {
                dp[f][j][k] = dp[p][j][k];
            }
        }
        if (b[i] != -1) {
            for (int j = 1; j <= n; j++) {
                for (int k = 0; k < n; k++) {
                    dp[f][j + 1][k + 1] = min(dp[f][j + 1][k + 1], dp[p][j][k] + ((ldb) (b[i] + 0.000) / (ldb) (j + 0.000)));
                }
            }
        }
        for (int j = 1; j <= n + 1; j++) {
            for (int k = 0; k < n; k++) {
                dp[f][j][k + 1] = min(dp[f][j][k + 1], dp[p][j][k] + ((ldb) (a[i] + 0.000) / (ldb) (j + 0.000)));
            }
        }
        for (int j = 0; j <= n + 1; j++) {
            for (int k = 0; k <= n; k++) {
                dp[p][j][k] = dp[f][j][k];
            }
        }
    }
    double ans = inf;
    for (int k = 0; k < 2; k++) {
        for (int i = 1; i <= n + 1; i++) {
            ans = min(ans, dp[k][i][m]);
        }
    }
    printf("%.5lf\n", ans);
}

Compilation message

Main.cpp: In function 'int main()':
Main.cpp:21:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   21 |     scanf("%d%d", &n, &m);
      |     ~~~~~^~~~~~~~~~~~~~~~
Main.cpp:23:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   23 |         scanf("%d%d", &a[i], &b[i]);
      |         ~~~~~^~~~~~~~~~~~~~~~~~~~~~

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 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 304 KB Output is correct
5 Correct 195 ms 4260 KB Output is correct
6 Correct 205 ms 4260 KB Output is correct
7 Correct 181 ms 4260 KB Output is correct
8 Correct 183 ms 4264 KB Output is correct
9 Correct 205 ms 4264 KB Output is correct
10 Correct 201 ms 4264 KB Output is correct

Subtask #2
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 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 304 KB Output is correct
5 Correct 195 ms 4260 KB Output is correct
6 Correct 205 ms 4260 KB Output is correct
7 Correct 181 ms 4260 KB Output is correct
8 Correct 183 ms 4264 KB Output is correct
9 Correct 205 ms 4264 KB Output is correct
10 Correct 201 ms 4264 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 310 ms 4268 KB Output is correct
13 Correct 233 ms 4180 KB Output is correct
14 Correct 238 ms 4264 KB Output is correct
15 Correct 250 ms 4264 KB Output is correct
16 Correct 258 ms 4268 KB Output is correct
17 Correct 203 ms 4308 KB Output is correct
18 Correct 237 ms 4264 KB Output is correct
19 Correct 227 ms 4264 KB Output is correct
20 Correct 187 ms 4268 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 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 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 308 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Incorrect 1 ms 308 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 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 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 308 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Incorrect 1 ms 308 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 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 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 308 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Incorrect 1 ms 308 KB Output isn't correct
10 Halted 0 ms 0 KB -

Subtask #6
0 / 11.0

# Verdict Execution time Memory Grader output
1 Incorrect 289 ms 4260 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 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 304 KB Output is correct
5 Correct 195 ms 4260 KB Output is correct
6 Correct 205 ms 4260 KB Output is correct
7 Correct 181 ms 4260 KB Output is correct
8 Correct 183 ms 4264 KB Output is correct
9 Correct 205 ms 4264 KB Output is correct
10 Correct 201 ms 4264 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 310 ms 4268 KB Output is correct
13 Correct 233 ms 4180 KB Output is correct
14 Correct 238 ms 4264 KB Output is correct
15 Correct 250 ms 4264 KB Output is correct
16 Correct 258 ms 4268 KB Output is correct
17 Correct 203 ms 4308 KB Output is correct
18 Correct 237 ms 4264 KB Output is correct
19 Correct 227 ms 4264 KB Output is correct
20 Correct 187 ms 4268 KB Output is correct
21 Correct 1 ms 340 KB Output is correct
22 Correct 1 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 1 ms 340 KB Output is correct
26 Correct 1 ms 340 KB Output is correct
27 Correct 1 ms 308 KB Output is correct
28 Correct 1 ms 340 KB Output is correct
29 Incorrect 1 ms 308 KB Output isn't correct
30 Halted 0 ms 0 KB -