oj.uz

Submission #528040

# Submission time Handle Problem Language Result Execution time Memory
528040 2022-02-19T03:34:59 Z amukkalir Let's Win the Election (JOI22_ho_t3) C++17
5 / 100
 23 ms 5196 KB 
#include <bits/stdc++.h> 
using namespace std; 
typedef long long ll; 
 
#define prn printf
#define scn scanf
#define pii pair<int,int> 
#define fi first 
#define se second 
#define mp make_pair

const int nax = 500;  
const int inf = 1e9; 

int n,k; 
double memo[nax+5][nax+5][nax+5]; 
vector<pii> a; 

double dp(int idx, int col, int rem) {
    if(rem == 0) return 0; 
    if(idx == n) return inf; 

    double &ret = memo[idx][col][rem]; 
    if(ret!=0) return ret; 

    ret = dp(idx+1, col, rem); // ga ambil 
    if(a[idx].fi != inf) ret = min(ret, (double)a[idx].fi/col + dp(idx+1, col+1, rem-1)); 
    else ret = min(ret, (double)a[idx].se/col + dp(idx+1,col,rem-1)); 

   // cerr << idx << " " << col << " " << rem << " = " << ret << endl; 
    return ret; 
}

signed main () {
    scn("%d%d", &n, &k); 
    a.assign(n,{0,0}); 
    for(int i=0; i<n; i++) {
        scn("%d%d", &a[i].se, &a[i].fi);
        if(a[i].fi == -1) a[i].fi = inf; 
    }
    sort(a.begin(), a.end()); 
    for(int i=0; i<n; i++) {
        if(a[i].fi != inf) a.push_back(mp(inf, a[i].se)); 
        else break; 
    }
    n = a.size(); 
    sort(a.begin(), a.end()); 

    //for(int i=0; i<n; i++) cerr << a[i].fi << " " << a[i].se << endl; 

    double ans = dp(0, 1, k); 
    prn("%f", ans); 
}

/*
dp(i,j,k) = time minimum untuk visit k kota up to index i 
ddn j collaboratior 

dp(i,j,0) = 0

ambil b 
dp(i+1, j+1, k-1) + b[i]
ambil a 
dp(i+1, j, k-1) + a[i]
ga ambil 
dp(i+1, j+1, k)
*/

Compilation message

Main.cpp: In function 'int main()':
Main.cpp:35:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   35 |     scn("%d%d", &n, &k);
      |        ^
Main.cpp:38:12: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   38 |         scn("%d%d", &a[i].se, &a[i].fi);
      |            ^

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Correct 3 ms 4428 KB Output is correct
6 Correct 4 ms 4684 KB Output is correct
7 Correct 5 ms 4976 KB Output is correct
8 Correct 6 ms 5196 KB Output is correct
9 Correct 5 ms 5196 KB Output is correct
10 Correct 5 ms 5068 KB Output is correct

Subtask #2
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Correct 3 ms 4428 KB Output is correct
6 Correct 4 ms 4684 KB Output is correct
7 Correct 5 ms 4976 KB Output is correct
8 Correct 6 ms 5196 KB Output is correct
9 Correct 5 ms 5196 KB Output is correct
10 Correct 5 ms 5068 KB Output is correct
11 Correct 1 ms 204 KB Output is correct
12 Runtime error 23 ms 2380 KB Execution killed with signal 11
13 Halted 0 ms 0 KB -

Subtask #3
0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 332 KB Output is correct
2 Correct 1 ms 332 KB Output is correct
3 Correct 1 ms 332 KB Output is correct
4 Incorrect 1 ms 460 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #4
0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 332 KB Output is correct
2 Correct 1 ms 332 KB Output is correct
3 Correct 1 ms 332 KB Output is correct
4 Incorrect 1 ms 460 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #5
0 / 33.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 332 KB Output is correct
2 Correct 1 ms 332 KB Output is correct
3 Correct 1 ms 332 KB Output is correct
4 Incorrect 1 ms 460 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #6
0 / 11.0

# Verdict Execution time Memory Grader output
1 Runtime error 21 ms 2252 KB Execution killed with signal 11
2 Halted 0 ms 0 KB -

Subtask #7
0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Correct 3 ms 4428 KB Output is correct
6 Correct 4 ms 4684 KB Output is correct
7 Correct 5 ms 4976 KB Output is correct
8 Correct 6 ms 5196 KB Output is correct
9 Correct 5 ms 5196 KB Output is correct
10 Correct 5 ms 5068 KB Output is correct
11 Correct 1 ms 204 KB Output is correct
12 Runtime error 23 ms 2380 KB Execution killed with signal 11
13 Halted 0 ms 0 KB -