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Submission #1112715

# Submission time Handle Problem Language Result Execution time Memory
1112715 2024-11-14T16:34:13 Z noyancanturk Gift (IZhO18_nicegift) C++17
100 / 100
 911 ms 113236 KB 
#include<bits/stdc++.h>
using namespace std;
#define int long long
#define pb push_back
using pii=pair<int,int>;
const int lim=1e5+100;

struct op{
  int val;
  vector<int>inds;
};

signed main(){
  int n,k;
  cin>>n>>k;
  int a[n],sm=0;
  for(int i=0;i<n;i++)cin>>a[i],sm+=a[i];
  int p[n];
  iota(p,p+n,0);
  sort(p,p+n,[&](int i,int j)->bool {
    return a[i]>a[j];
  });
  if(sm%k){
    cout<<-1;
    return 0;
  }
  sm/=k;
  if(sm<a[p[0]]){
    cout<<-1;
    return 0;
  }
  vector<op>ops;
  int left=n;
  while(left&&a[p[0]]!=a[p[left-1]]){
    op todo;
    int last=0;
    for(;last<n;last++){
      if(a[p[last]]==sm){
        todo.inds.pb(p[last]);
      }else break;
    }
    todo.val=min(a[p[left-1]],sm-a[p[last]]);
    for(int i=left-1;todo.inds.size()<k;i--){
      todo.inds.pb(p[i]);
    }
    sm-=todo.val;
    for(int i:todo.inds){
      a[i]-=todo.val;
    }
    ops.pb(todo);
    while(left&&a[p[left-1]]==0)left--;
  }
  if(left){
    int z=left/gcd(left,k);
    int val=sm/z;
    int i=0;
    for(int t=0;t<z;t++){
      op todo;
      todo.val=val;
      for(int j=0;j<k;j++,(i=((i+1)%left))){
        todo.inds.pb(p[i]);
      }
      ops.pb(todo);
    }
  }
  cout<<ops.size()<<'\n';
  for(op&pp:ops){
    cout<<pp.val<<' ';
    for(int i:pp.inds){
      cout<<i+1<<' ';
    }
    cout<<'\n';
  }
}

Compilation message

nicegift.cpp: In function 'int main()':
nicegift.cpp:43:38: warning: comparison of integer expressions of different signedness: 'std::vector<long long int>::size_type' {aka 'long unsigned int'} and 'long long int' [-Wsign-compare]
   43 |     for(int i=left-1;todo.inds.size()<k;i--){
      |                      ~~~~~~~~~~~~~~~~^~

Subtask #1
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 336 KB n=4
2 Correct 1 ms 336 KB n=3
3 Correct 1 ms 336 KB n=3
4 Correct 1 ms 336 KB n=4
5 Correct 1 ms 336 KB n=4
6 Correct 1 ms 336 KB n=2

Subtask #2
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 336 KB n=4
2 Correct 1 ms 336 KB n=3
3 Correct 1 ms 336 KB n=3
4 Correct 1 ms 336 KB n=4
5 Correct 1 ms 336 KB n=4
6 Correct 1 ms 336 KB n=2
7 Correct 1 ms 336 KB n=5
8 Correct 1 ms 336 KB n=8
9 Correct 1 ms 336 KB n=14
10 Correct 1 ms 336 KB n=11
11 Correct 17 ms 3524 KB n=50000
12 Correct 15 ms 3012 KB n=50000
13 Correct 1 ms 336 KB n=10
14 Correct 1 ms 336 KB n=685
15 Correct 1 ms 348 KB n=623
16 Correct 1 ms 336 KB n=973

Subtask #3
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 336 KB n=4
2 Correct 1 ms 336 KB n=3
3 Correct 1 ms 336 KB n=3
4 Correct 1 ms 336 KB n=4
5 Correct 1 ms 336 KB n=4
6 Correct 1 ms 336 KB n=2
7 Correct 1 ms 336 KB n=5
8 Correct 1 ms 336 KB n=8
9 Correct 1 ms 336 KB n=14
10 Correct 1 ms 336 KB n=11
11 Correct 17 ms 3524 KB n=50000
12 Correct 15 ms 3012 KB n=50000
13 Correct 1 ms 336 KB n=10
14 Correct 1 ms 336 KB n=685
15 Correct 1 ms 348 KB n=623
16 Correct 1 ms 336 KB n=973
17 Correct 1 ms 336 KB n=989
18 Correct 2 ms 564 KB n=563
19 Correct 2 ms 336 KB n=592
20 Correct 2 ms 592 KB n=938
21 Correct 1 ms 336 KB n=747
22 Correct 2 ms 592 KB n=991

Subtask #4
19.0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 529 ms 62368 KB n=1000000
2 Correct 317 ms 33760 KB n=666666
3 Correct 188 ms 18256 KB n=400000
4 Correct 296 ms 50336 KB n=285714
5 Correct 10 ms 1104 KB n=20000
6 Correct 245 ms 44176 KB n=181818
7 Correct 5 ms 848 KB n=10000
8 Correct 24 ms 4708 KB n=6666
9 Correct 3 ms 592 KB n=4000
10 Correct 143 ms 25572 KB n=2857
11 Correct 2 ms 336 KB n=2000

Subtask #5
51.0 / 51.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 336 KB n=4
2 Correct 1 ms 336 KB n=3
3 Correct 1 ms 336 KB n=3
4 Correct 1 ms 336 KB n=4
5 Correct 1 ms 336 KB n=4
6 Correct 1 ms 336 KB n=2
7 Correct 1 ms 336 KB n=5
8 Correct 1 ms 336 KB n=8
9 Correct 1 ms 336 KB n=14
10 Correct 1 ms 336 KB n=11
11 Correct 17 ms 3524 KB n=50000
12 Correct 15 ms 3012 KB n=50000
13 Correct 1 ms 336 KB n=10
14 Correct 1 ms 336 KB n=685
15 Correct 1 ms 348 KB n=623
16 Correct 1 ms 336 KB n=973
17 Correct 1 ms 336 KB n=989
18 Correct 2 ms 564 KB n=563
19 Correct 2 ms 336 KB n=592
20 Correct 2 ms 592 KB n=938
21 Correct 1 ms 336 KB n=747
22 Correct 2 ms 592 KB n=991
23 Correct 529 ms 62368 KB n=1000000
24 Correct 317 ms 33760 KB n=666666
25 Correct 188 ms 18256 KB n=400000
26 Correct 296 ms 50336 KB n=285714
27 Correct 10 ms 1104 KB n=20000
28 Correct 245 ms 44176 KB n=181818
29 Correct 5 ms 848 KB n=10000
30 Correct 24 ms 4708 KB n=6666
31 Correct 3 ms 592 KB n=4000
32 Correct 143 ms 25572 KB n=2857
33 Correct 2 ms 336 KB n=2000
34 Correct 13 ms 2524 KB n=23514
35 Correct 13 ms 2500 KB n=23514
36 Correct 1 ms 336 KB n=940
37 Correct 1 ms 504 KB n=2
38 Correct 70 ms 14508 KB n=100000
39 Correct 79 ms 14480 KB n=100000
40 Correct 1 ms 336 KB n=10
41 Correct 1 ms 336 KB n=100
42 Correct 4 ms 1104 KB n=1000
43 Correct 527 ms 101784 KB n=1000000
44 Correct 911 ms 113236 KB n=1000000
45 Correct 593 ms 83660 KB n=666666
46 Correct 379 ms 60252 KB n=400000
47 Correct 135 ms 25204 KB n=2336
48 Correct 342 ms 52380 KB n=285714
49 Correct 276 ms 42408 KB n=181818
50 Correct 171 ms 31440 KB n=40000
51 Correct 164 ms 28604 KB n=20000
52 Correct 144 ms 26560 KB n=10000
53 Correct 150 ms 26308 KB n=6666
54 Correct 137 ms 25416 KB n=4000
55 Correct 144 ms 25472 KB n=2857
56 Correct 72 ms 12732 KB n=2000