oj.uz

Submission #887066

# Submission time Handle Problem Language Result Execution time Memory
887066 2023-12-13T15:47:33 Z beaboss Sirni (COCI17_sirni) C++14
98 / 140
 1039 ms 786432 KB 
// Source: https://oj.uz/problem/view/COCI17_sirni
// 

#include "bits/stdc++.h"

using namespace std;

#define s second
#define f first
#define pb push_back

typedef long long ll;

typedef pair<ll, ll> pii;
typedef vector<pii> vpii;

typedef vector<ll> vi;

#define FOR(i, a, b) for (ll i = (a); i<b; i++)

bool ckmin(ll& a, ll b){ return b < a ? a = b, true : false; }

bool ckmax(ll& a, ll b){ return b > a ? a = b, true : false; }



const ll P = 1e7 + 10;

vpii ed[P];
bool vals[P];
struct DSU {
	vector<ll> e;
	DSU(ll N) { e = vector<ll>(N, -1); }

	// get representive component (uses path compression)
	ll get(ll x) { return e[x] < 0 ? x : e[x] = get(e[x]); }

	bool same_set(ll a, ll b) { return get(a) == get(b); }

	ll size(ll x) { return -e[get(x)]; }

	bool unite(ll x, ll y) {  // union by size
		x = get(x), y = get(y);
		if (x == y) return false;
		if (e[x] > e[y]) swap(x, y);
		e[x] += e[y];
		e[y] = x;
		return true;
	}
};

DSU dsu(P);

ll nxt[P];

set<int> uni;

int main() {
	ios::sync_with_stdio(false);
	cin.tie(nullptr);

	ll n;
	cin >> n;

	FOR(i, 1, n + 1) {
		ll k;
		cin >> k;
		vals[k]=true;
		uni.insert(k);
	}

	ll largest = -1;
	ll cur = largest;

	for (ll i = P-1; i >= 0; i--) {
		if (vals[i]) largest=i;
		// if (largest != -1) cout << largest << endl;
		nxt[i] = largest;
	}

	for (auto cur: uni) {

		for (ll e = cur; e < P; e += cur) {
			

			// ll ub = e + cur - 1;

			ll val = nxt[e];
			if (e == cur) val = nxt[e+1];

			if (val == -1) break;
			
			if (val < e + cur) ed[val % cur].pb({cur, val});


			// cout << cur << val << endl;

			// if (it == uni.begin()) continue;
			// ll val = *prev(it, 1);
			// while (val >= e) {
			// 	cout << cur << val << endl;
			// 	ed.pb({val - e, {cur, val}});
			// 	ub = (e + val) / 2;

			// 	if (val == e) break;

			// 	it = uni.upper_bound(ub);
			// 	if (it == uni.begin()) break;
			// 	val = *prev(it, 1);
			// } 
		}
	}


	ll sz = 0;

	FOR(c, 0, P) {
		for (auto e: ed[c]) 
			if (dsu.unite(e.f, e.s)) sz += c;
	
	}

	cout << sz << endl;


}

Compilation message

sirni.cpp: In function 'int main()':
sirni.cpp:73:5: warning: unused variable 'cur' [-Wunused-variable]
   73 |  ll cur = largest;
      |     ^~~

Subtask #1
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 205 ms 396188 KB Output is correct
2 Correct 184 ms 399872 KB Output is correct
3 Correct 147 ms 396628 KB Output is correct

Subtask #2
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 141 ms 393556 KB Output is correct
2 Correct 448 ms 395524 KB Output is correct
3 Correct 141 ms 396628 KB Output is correct

Subtask #3
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 154 ms 396376 KB Output is correct
2 Correct 143 ms 395448 KB Output is correct
3 Correct 144 ms 396376 KB Output is correct

Subtask #4
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 207 ms 418484 KB Output is correct
2 Correct 296 ms 472896 KB Output is correct
3 Correct 211 ms 428992 KB Output is correct

Subtask #5
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 142 ms 399184 KB Output is correct
2 Correct 235 ms 438436 KB Output is correct
3 Correct 193 ms 418556 KB Output is correct

Subtask #6
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 241 ms 443792 KB Output is correct
2 Correct 320 ms 502268 KB Output is correct
3 Correct 208 ms 426260 KB Output is correct

Subtask #7
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 157 ms 403740 KB Output is correct
2 Correct 289 ms 490912 KB Output is correct
3 Correct 202 ms 425352 KB Output is correct

Subtask #8
0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 239 ms 428984 KB Output is correct
2 Runtime error 901 ms 786432 KB Execution killed with signal 9
3 Halted 0 ms 0 KB -

Subtask #9
0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 245 ms 430284 KB Output is correct
2 Runtime error 1039 ms 786432 KB Execution killed with signal 9
3 Halted 0 ms 0 KB -

Subtask #10
0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 156 ms 407092 KB Output is correct
2 Runtime error 1006 ms 786432 KB Execution killed with signal 9
3 Halted 0 ms 0 KB -