Submission #397505

#	Time	Username	Problem	Language	Result	Execution time	Memory
397505		MarcoMeijer	Table Tennis (info1cup20_tabletennis)	C++14	100 / 100	813 ms	12976 KiB

tabletennis

#include <bits/stdc++.h>
using namespace std;
 
// macros
typedef long long ll;
typedef long double ld;
typedef pair<int, int> ii;
typedef pair<ll, ll> lll;
typedef tuple<int, int, int> iii;
typedef vector<int> vi;
typedef vector<ii> vii;
typedef vector<iii> viii;
typedef vector<ll> vll;
typedef vector<lll> vlll;
#define REP(a,b,c) for(int a=int(b); a<int(c); a++)
#define RE(a,c) REP(a,0,c)
#define RE1(a,c) REP(a,1,c+1)
#define REI(a,b,c) REP(a,b,c+1)
#define REV(a,b,c) for(int a=int(c-1); a>=int(b); a--)
#define FOR(a,b) for(auto& a : b)
#define all(a) a.begin(), a.end()
#define INF 1e18
#define EPS 1e-9
#define pb push_back
#define popb pop_back
#define fi first
#define se second
mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count());
 
// input
template<class T> void IN(T& x) {cin >> x;}
template<class H, class... T> void IN(H& h, T&... t) {IN(h); IN(t...); }
 
// output
template<class T1, class T2> void OUT(const pair<T1,T2>& x);
template<class T> void OUT(const vector<T>& x);
template<class T> void OUT(const T& x) {cout << x;}
template<class H, class... T> void OUT(const H& h, const T&... t) {OUT(h); OUT(t...); }
template<class T1, class T2> void OUT(const pair<T1,T2>& x) {OUT(x.fi,' ',x.se);}
template<class T> void OUT(const vector<T>& x) {RE(i,x.size()) OUT(i==0?"":" ",x[i]);}
template<class... T> void OUTL(const T&... t) {OUT(t..., "\n"); }
template<class H> void OUTLS(const H& h) {OUTL(h); }
template<class H, class... T> void OUTLS(const H& h, const T&... t) {OUT(h,' '); OUTLS(t...); }
 
// dp
template<class T> bool ckmin(T&a, T&b) { bool bl = a > b; a = min(a,b); return bl;}
template<class T> bool ckmax(T&a, T&b) { bool bl = a < b; a = max(a,b); return bl;}
 
void program();
int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cout.tie(NULL);
    program();
}
 
 
//===================//
//   begin program   //
//===================//
 
const int MX = 5e5;
const int N = (1<<20);

int n, k, m;
int a[MX], b[MX];

bool exists(int i) {
    return *(lower_bound(a,a+m,i)) == i;
}
bool check(int x) {
    int cnt = 0;
    RE(i,m) {
        if(x-a[i] <= a[i]) break;
        if(exists(x-a[i])) cnt += 2;
    }
    return cnt>=n;
}

void program() {
    IN(n,k); m=n+k;
    RE(i,m) IN(a[i]);
    map<int,int> mp;
    int y = min(k+2,m);
    RE(i,y) RE(j,y) mp[a[i]+a[m-j-1]]++;

    vii v;
    FOR(p,mp) v.pb({p.se, p.fi});
    sort(all(v), greater<ii>());

    FOR(p,v) if(check(p.se)) {
        int x = p.se;
        vi ans;
        RE(i,m) {
            if(x-a[i] <= a[i]) break;
            if(exists(x-a[i])) ans.pb(a[i]), ans.pb(x-a[i]);
            if(ans.size() == n) break;
        }
        sort(all(ans));
        OUTL(ans);
        return;
    }
    OUTL("huh?");
}

Compilation message (stderr)

tabletennis.cpp: In function 'void program()':
tabletennis.cpp:97:27: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   97 |             if(ans.size() == n) break;
      |                ~~~~~~~~~~~^~~~

• 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