Submission #861863

#	Time	Username	Problem	Language	Result	Execution time	Memory
861863		maks007	Zalmoxis (BOI18_zalmoxis)	C++14	100 / 100	116 ms	28716 KiB

zalmoxis

#include "bits/stdc++.h"

using namespace std;

#define int long long

int k;
vector <pair <int,int>> ans;
vector <int> a;

void decomp(int v) {
	stack <int> q;
	vector <int> ans2;
	q.push(v);
	while(q.size() + ans2.size() != k + 1) {
		if(q.size() == 0) break;
		int v = q.top();
		q.pop();
		if(v == 0) {
			ans2.push_back(v);
			continue;
		}
		q.push(v-1);
		q.push(v-1);
	}
	k -= (int)q.size() + (int)ans2.size() - 1;
	while(q.size()) {
		int v =q.top();
		q.pop();
		ans2.push_back(v);
	} 
	for(auto i : ans2) cout << i << " ";
}

void f(int v) {
	if(a.size() == 0) {
		ans.push_back({v, 1});
		return;
	}
	if(v == a.back()) {
		ans.push_back({v,0});
		a.pop_back();
		return;
	}
	if(a.back() > v) {
		ans.push_back({v,1});
		return;
	}
	f(v-1);
	f(v-1);
}

signed main () {
	ios::sync_with_stdio(0);
	cin.tie(0); cout.tie(0);
	int n, cnt = 0;
	cin >> n >> k;
	for(int i = 0; i < n; i ++) {
		int x;
		cin >> x;
		a.push_back(x);
	}
	reverse(a.begin(), a.end());

	f(30);
	// assert()
	// for(auto i : ans) cout << i.first << " ";
		
	for(auto i : ans) k -= i.second;
	// if(k < 0) {
	// 	while(1){}
	// }
	for(auto i : ans) {
		if(i.second == 0) cout << i.first << " ";
		else if(k){
			decomp(i.first);
		}else cout << i.first << " ";
	}
	return 0;
}

Compilation message (stderr)

zalmoxis.cpp: In function 'void decomp(long long int)':
zalmoxis.cpp:15:31: warning: comparison of integer expressions of different signedness: 'std::stack<long long int>::size_type' {aka 'long unsigned int'} and 'long long int' [-Wsign-compare]
   15 |  while(q.size() + ans2.size() != k + 1) {
      |        ~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~
zalmoxis.cpp: In function 'int main()':
zalmoxis.cpp:56:9: warning: unused variable 'cnt' [-Wunused-variable]
   56 |  int n, cnt = 0;
      |         ^~~

• Subtask 1: 30 / 30
• Subtask 2: 70 / 70