Submission #197667

#	Time	Username	Problem	Language	Result	Execution time	Memory
197667		Neklixx	San (COCI17_san)	C++14	120 / 120	21 ms	2260 KiB

san

#pragma GCC optimize("Ofast")
#pragma comment(linker,"/stack:200000000")
#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")
#include <bits/stdc++.h>
#define pb push_back
#define mp make_pair
#define F first
#define S second
#define all(v) v.begin(), v.end()
#define sh cin.tie(0); cin.sync_with_stdio(0); cout.tie(0);
#define FILE freopen("test.in", "r", stdin);
#define vprint(v) for (int ii = 0; ii < v.size(); ii++){cout << v[ii] << " ";}
#define debugv(v) if (v.size() != 0) {cout << "[ "; for (int __ = 0; __ < (int)(v.size()) - 1; __++){cout << v[__] << ", ";} cout << v[(int)(v.size()) - 1] << " ]" << endl;} else {cout << "[]" << endl;}
#define debug cout << "-----------------------------------------------" << endl;
#define print1(a) cout << "{ " << a << " }" << endl;
#define print2(a, b) cout << "{ " << a << ", " << b << " }" << endl;
#define print3(a, b, c) cout << "{ " << a << ", " << b << ", " << c << " }" << endl;
#define print4(a, b, c, d) cout << "{ " << a << ", " << b << ", " << c << ", " << d << " }" << endl;
using namespace std;
#define int long long
const int INF = 1e9 + 228;
const int MAXN = 40;

map<int, int> dp[MAXN];
int n, k;

void slow() {
	vector<pair<int, int>> v;
	for (int i = 0; i < n; i++) {
		int aa, bb;
		cin >> aa >> bb;
		v.pb({aa, bb});
	}    
	int ans = 0;
	for (int i = 0; i < n; i++) {
		dp[i][min(v[i].S, k)]++;
		for (int j = 0; j < i; j++) {
			if (v[i].F < v[j].F)
				continue;
			//print2(i, j);
			for (auto to : dp[j]) {
				dp[i][min(to.F + v[i].S, k)] += to.S; 
			}
		}
	}
	for (int i = 0; i < n; i++) {
		for (auto to : dp[i]) {
			if (to.F >= k) {
				ans += to.S;
			}
		}
	}
	cout << ans << endl;
}

signed main()
{
#ifdef LOCAL
    FILE;
#endif
    sh;
	cin >> n >> k;
	if (n <= 1) {
		slow();
		return 0;
	}
	int beg = n / 2;
	int rs = n - beg;
	vector<pair<int, int>> v;
	for (int i = 0; i < n; i++) {
		int aa, bb;
		cin >> aa >> bb;
		v.pb({aa, bb});
	}    
	//int ans = 0;
	for (int i = 0; i < beg; i++) {
		dp[i][min(v[i].S, k)]++;
		for (int j = 0; j < i; j++) {
			if (v[i].F < v[j].F)
				continue;
			//print2(i, j);
			for (auto to : dp[j]) {
				dp[i][min(to.F + v[i].S, k)] += to.S; 
			}
		}
	}
	for (int i = n - 1; i >= beg; i--) {
		dp[i][min(k, v[i].S)]++;
		for (int j = n - 1; j > i; j--) {
			if (v[i].F > v[j].F)
				continue;
			//print2(i, j);
			for (auto to : dp[j]) {
				dp[i][min(k, to.F + v[i].S)] += to.S; 
			}
		}
		
	}
	int ans = 0;
	for (int i = 0; i < beg; i++) {
		for (int j = beg; j < n; j++) {
			if (v[i].F > v[j].F) {
				continue;
			}
			vector<pair<int, int>> a, b;
			for (auto to : dp[i]) {
				a.pb({to.F, to.S});
			}
			for (auto to : dp[j]) {
				b.pb({to.F, to.S});
			}
			sort(all(a));
			sort(all(b));
			vector<int> p;
			p.pb(0);
			int u = b.size();
			for (int i = u - 1; i >= 0; i--) {
				p.pb(p.back() + b[i].S);
			}
			p.pb(p.back());
			reverse(all(p));
			/*for (auto to : b) {
				cout << to.F << ' ';
			}
			cout << endl;*/
			for (auto to : a) {
				int need = max(0LL, k - to.F);
				int idx = lower_bound(all(b), mp(need, -INF)) - b.begin();
				//print4(i, to.F, j, idx);
				ans += (to.S * p[idx + 1]);
			}
		}
	}
	for (int i = 0; i < beg; i++) {
		for (auto to : dp[i]) {
			if (to.F >= k) {
				ans += to.S;
			}
		}
	}
	for (int i = beg; i < n; i++) {
		for (auto to : dp[i]) {
			if (to.F >= k) {
				ans += to.S;
			}
		}
	}
	cout << ans << endl;
    return 0;
}

Compilation message (stderr)

san.cpp:2:0: warning: ignoring #pragma comment  [-Wunknown-pragmas]
 #pragma comment(linker,"/stack:200000000")
 
san.cpp: In function 'int main()':
san.cpp:68:6: warning: unused variable 'rs' [-Wunused-variable]
  int rs = n - beg;
      ^~

• Subtask 1: 24 / 24
• Subtask 2: 24 / 24
• Subtask 3: 24 / 24
• Subtask 4: 24 / 24
• Subtask 5: 24 / 24