Submission #1045028

#	Time	Username	Problem	Language	Result	Execution time	Memory
1045028		Malix	Table Tennis (info1cup20_tabletennis)	C++14	100 / 100	202 ms	3188 KiB

tabletennis

#include <bits/stdc++.h>
using namespace std;
typedef vector<int> vi; 
#define REP(i,a,b) for(int i=a;i<b;i++)
#define PB push_back
int n,k;
vi a,ans;
bool solve(int x){
    int l=0,r=n+k-1;ans.clear();
    while(l<r&&ans.size()<n){
        while(l<r&&a[l]+a[r]>x)r--;
        if(l<r&&a[l]+a[r]==x){
            ans.PB(a[l]);ans.PB(a[r]);
        }
        if(r-l+1+ans.size()<n)break;
        l++;
    }
    sort(ans.begin(),ans.end());
    return ans.size()==n;
}

int main() {
    cin>>n>>k;a.resize(n+k);
    REP(i,0,n+k)cin>>a[i];
    REP(i,0,k+1)REP(j,n-1,n+k)if(solve(a[i]+a[j])){
        for(auto u:ans)cout<<u<<" ";
        return 0;
    }
}

Compilation message (stderr)

tabletennis.cpp: In function 'bool solve(int)':
tabletennis.cpp:10:26: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   10 |     while(l<r&&ans.size()<n){
      |                ~~~~~~~~~~^~
tabletennis.cpp:15:28: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   15 |         if(r-l+1+ans.size()<n)break;
      |            ~~~~~~~~~~~~~~~~^~
tabletennis.cpp:19:22: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   19 |     return ans.size()==n;
      |            ~~~~~~~~~~^~~

• Subtask 1: 11 / 11
• Subtask 2: 9 / 9
• Subtask 3: 14 / 14
• Subtask 4: 15 / 15
• Subtask 5: 9 / 9
• Subtask 6: 14 / 14
• Subtask 7: 15 / 15
• Subtask 8: 13 / 13