oj.uz

Submission #491601

# Submission time Handle Problem Language Result Execution time Memory
491601 2021-12-03T12:42:57 Z n3rm1n Table Tennis (info1cup20_tabletennis) C++17
11 / 100
 17 ms 2136 KB 
#include<bits/stdc++.h>
#define endl '\n'
using namespace std;
const int MAXN=150505;
void speed()
{
	ios_base::sync_with_stdio(false);
	cin.tie(0);
	cout.tie(0);
}
int n,k;
long long a[MAXN];
void read()
{
    cin>>n>>k;
    for(int i=1;i<=n+k;i++)
        cin>>a[i];
}
bool check(int idx)
{
    int i=1,j=n+k;
    if(i==idx)i++;
    if(j==idx)j--;
    long long sum=a[i]+a[j];
    i++;
    j--;
    while(i<j)
    {
       if(i==idx)i++;
       if(j==idx)j--;
       if(a[i]+a[j]!=sum)return false;
       i++;
       j--;
    }
    return true;
}
void solve_st1()
{
    for(int i=1;i<=n+k;i++)
    {
        if(check(i)==true)
        {
            for(int j=1;j<i;j++)
                cout<<a[j]<<" ";
            for(int j=i+1;j<=n+k;j++)
                cout<<a[j]<<" ";
            cout<<endl;
        }
    }
}
bool used[MAXN];
bool found=false;
void check()
{
    vector<long long>v;
    for(int i=1;i<=n+k;i++)
    {
        if(used[i]==1)v.push_back(a[i]);
    }
    int i=0;
    int j=v.size()-1;
    long long sum=a[i]+a[j];
    i++;
    j--;
    while(i<=j)
    {
        if(sum!=a[i]+a[j])return;
        i++;
        j--;
    }
    for(int i=0;i<v.size();i++)
    {
        cout<<v[i]<<" ";
    }
    cout<<endl;
    found=true;
}
void gen(int pos,int cntused)
{
    if(pos>n+k)
    {
        if(cntused==n&&found==false)check();
        return;
    }
    used[pos]=1;
    gen(pos+1,cntused+1);
    used[pos]=0;
    gen(pos+1,cntused);
}
int main()
{
	speed();
	read();
	if(k==1&&n<=2000)
    {
        solve_st1();
        return 0;
    }
    if(n+k<=18)
    {
        gen(1,0);
        return 0;
    }
	return 0;
}

Compilation message

tabletennis.cpp: In function 'void check()':
tabletennis.cpp:71:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   71 |     for(int i=0;i<v.size();i++)
      |                 ~^~~~~~~~~

Subtask #1
11.0 / 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

Subtask #2
0 / 9.0

# Verdict Execution time Memory Grader output
1 Incorrect 3 ms 544 KB Unexpected end of file - int32 expected
2 Halted 0 ms 0 KB -

Subtask #3
0 / 14.0

# Verdict Execution time Memory Grader output
1 Incorrect 17 ms 2136 KB Unexpected end of file - int32 expected
2 Halted 0 ms 0 KB -

Subtask #4
0 / 15.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 316 KB Unexpected end of file - int32 expected
2 Halted 0 ms 0 KB -

Subtask #5
0 / 9.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 204 KB Unexpected end of file - int32 expected
2 Halted 0 ms 0 KB -

Subtask #6
0 / 14.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 204 KB Unexpected end of file - int32 expected
2 Halted 0 ms 0 KB -

Subtask #7
0 / 15.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 324 KB Unexpected end of file - int32 expected
2 Halted 0 ms 0 KB -

Subtask #8
0 / 13.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 204 KB Unexpected end of file - int32 expected
2 Halted 0 ms 0 KB -