Submission #587537

#	Time	Username	Problem	Language	Result	Execution time	Memory
587537		Tekor	Team Contest (JOI22_team)	C++17	55 / 100	2085 ms	6596 KiB

team

#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define pb push_back
#define all(v) v.begin(),v.end()
void boos() {
	ios_base :: sync_with_stdio(0);
	cin.tie(0);
	cout.tie(0);
}
const int N = 3e5 + 100;
const int M = 21;
const ll LLINF = (ll)1e18;
ll a[N],b[N],c[N];
bool u[M][M][M],u1[M][M][M],u2[M][M][M];
int n;
bool cmp(int x,int y) {
	return a[x] < a[y];
}
bool cmp1(int x,int y) {
	return b[x] < b[y];
}
ll check(ll x,ll y,ll t) {
	bool ch = 0,ch1 = 0,ch2 = 0;
	for(int i = 1;i <= n;i++) {
		if(a[i] == x && b[i] < y && c[i] < t)ch = 1;
		if(a[i] < x && b[i] == y && c[i] < t)ch1 = 1;
		if(a[i] < x && b[i] < y && c[i] == t)ch2 = 1;
	}
	if(ch && ch1 && ch2)return x + y + t;
	else return -1;
}
void solve() {
	cin >> n;
	vector <int> g,q;
	ll mx = 0;
	for(int i = 1;i <= n;i++) {
		cin >> a[i] >> b[i] >> c[i];
		mx = max(mx,a[i]);
		mx = max(mx,b[i]);
		mx = max(mx,c[i]);
		g.pb(i);
		q.pb(i);
	}
	ll ans = -1;
	if(mx <= 20) {
		for(int i = 1;i <= n;i++) {
			for(int j = b[i] + 1;j <= mx;j++) {
				for(int h = c[i] + 1;h <= mx;h++) {
					u[a[i]][j][h] = 1;
				}
			}
			for(int j = a[i] + 1;j <= mx;j++) {
				for(int h = c[i] + 1;h <= mx;h++) {
					u1[b[i]][j][h] = 1;
				}
			}
			for(int j = a[i] + 1;j <= mx;j++) {
				for(int h = b[i] + 1;h <= mx;h++) {
					u2[c[i]][j][h] = 1;
				}
			}
		}
		for(int i = 1;i <= mx;i++) {
			for(int j = 1;j <= mx;j++) {
				for(int h = 1;h <= mx;h++) {
					if(u[i][j][h] && u1[j][i][h] && u2[h][i][j])ans = max(ans,(ll)(i + j + h));
				}
			}
		}
		cout << ans;
		return;
	}
	sort(all(g),cmp);
	sort(all(q),cmp1);
	for(auto v : g) {
		ll mxa = a[v];
		set <ll> tt;
		//cout << v << " -- " << a[v] << endl;
		for(int j = 0;j < q.size();j++) {
			int to = q[j];
			ll mxb = b[to];
			//cout << to << " :: " << b[to] << " == ";
			if(j > 0 && b[q[j - 1]] != b[to]) {
				int pos = j - 1;
				while(pos >= 0 && b[q[pos]] == b[q[j - 1]]) {
					int p = q[pos];
					if(a[p] < mxa)tt.insert(c[p]);
					pos--;
				}	
			}
			if(a[to] >= mxa || b[v] >= mxb) {
				//cout << "fail" << endl;
				continue;
			}
			if(!tt.empty()) {
				ll val = *(tt.rbegin());
				if(val > max(c[v],c[to]))ans = max(ans,mxa + mxb + val);
				//cout << val << " ";
			}
			//cout << ans << endl;
		}
		//cout << ans << endl;
	} 
	cout << ans;
}
int main() {
	boos();
	solve();
}

Compilation message (stderr)

team.cpp: In function 'void solve()':
team.cpp:80:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   80 |   for(int j = 0;j < q.size();j++) {
      |                 ~~^~~~~~~~~~

• Subtask 1: 8 / 8
• Subtask 2: 29 / 29
• Subtask 3: 9 / 9
• Subtask 4: 9 / 9
• Subtask 5: 0 / 9
• Subtask 6: 0 / 9
• Subtask 7: 0 / 27