Submission #803041

#	Time	Username	Problem	Language	Result	Execution time	Memory
803041		ezdp	Homework (CEOI22_homework)	C++14	100 / 100	225 ms	174840 KiB

Main

#include<bits/stdc++.h>
#include<ext/pb_ds/assoc_container.hpp>

#define endl '\n'
#define pb push_back
#define fr first
#define sc second
#define ll long long int
#define ld long double
#define lsb(idx) idx&(-idx)
#define bin(x) bitset<32>(x).to_string()
#define all(A) A.begin(), A.end()
#define de(x) cout << #x << " = " << x << endl;

using namespace std;
using namespace __gnu_pbds;

template<class T> using oset = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
template<class T> using matrix = vector<vector<T>>;
// find_by_order(x) -> x-th element in the set
// order_of_key(x)  -> how many elements are less than x
// insert(x)		 -> inserts x into the set

const int MAXN = 2e7;

int T = 1, type[MAXN + 5];
tuple<int, int, int> interval[MAXN + 5];
matrix<int> G;

void dfs(int u = 1){
	if(type[u] == 'l'){
		interval[u] = {1, 1, 1};
		return;
	}
	for(auto v : G[u])
		dfs(v);
	auto [l1, r1, s1] = interval[G[u][0]];
	auto [l2, r2, s2] = interval[G[u][1]];
	if(type[u] == 'n'){
		interval[u] = {min(l1, l2), r1 + r2 - 1, s1 + s2};
		return;
	}
	if(type[u] == 'x'){
		interval[u] = {l1 + l2, max(r1 + s2, s1 + r2), s1 + s2};
		return;
	}
}

int main(){
	ios_base::sync_with_stdio(false); cin.tie(NULL);
	// freopen("filename.in" , "r", stdin); 
	// freopen("filename.out", "w", stdout);
	string t; cin >> t;
	stack<int> st;
	G.resize(1);
	for(int i = 0; i < t.size(); i ++){
		if(t[i] == '(' || t[i] == '?'){
			G.pb(vector<int>());
			type[T] = (t[i] == '(' ? t[i - 1] : 'l');
			if(!st.empty()){
				G[st.top()].pb(T);
			}
			if(t[i] == '(')
				st.push(T);
			++ T;
		}
		if(t[i] == ')'){
			st.pop();
		}
	}
	dfs();
	cout << get<1>(interval[1]) - get<0>(interval[1]) + 1 << endl;
}
/**

*/

Compilation message (stderr)

Main.cpp: In function 'void dfs(int)':
Main.cpp:37:7: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   37 |  auto [l1, r1, s1] = interval[G[u][0]];
      |       ^
Main.cpp:38:7: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   38 |  auto [l2, r2, s2] = interval[G[u][1]];
      |       ^
Main.cpp: In function 'int main()':
Main.cpp:56:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   56 |  for(int i = 0; i < t.size(); i ++){
      |                 ~~^~~~~~~~~~

• Subtask 1: 10 / 10
• Subtask 2: 13 / 13
• Subtask 3: 13 / 13
• Subtask 4: 30 / 30
• Subtask 5: 34 / 34