제출 #443551

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
443551		penguinhacker	Kvalitetni (COCI16_kvalitetni)	C++14	120 / 120	9 ms	1240 KiB

kvalitetni

#include <bits/stdc++.h>
using namespace std;

#define ll long long
#define ar array

int n, z[50], si;
string s;

double solve() {
	assert(s[si++]=='(');
	if (s[si]=='?') {
		si+=2;
		return z[0];
	}
	vector<double> v;
	char op='-';
	while(1) {
		v.push_back(solve());
		char cur=s[si++];
		if (cur==')')
			break;
		op=cur;
	}
	assert(v.size()>=2&&op=='+'||op=='*');
	if (op=='+')
		return min((double)z[v.size()-1], accumulate(v.begin(), v.end(), 0.0));
	double lb=0, rb=z[v.size()-1];
	for (int k=0; k<40; ++k) {
		double mid=(lb+rb)/2;
		double sum=0;
		for (double i : v)
			sum+=min(i, mid);
		if (sum<=z[v.size()-1])
			lb=mid;
		else
			rb=mid;
	}
	double p=1;
	for (double i : v)
		p*=min(i, lb);
	return p;
}

int main() {
	ios::sync_with_stdio(0);
	cin.tie(0);
	cin >> n;
	for (int i=0; i<n; ++i)
		cin >> z[i];
	cin >> s;
	cout << fixed << setprecision(3) << solve();
	return 0;
}

컴파일 시 표준 에러 (stderr) 메시지

In file included from /usr/include/c++/10/cassert:44,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:33,
                 from kvalitetni.cpp:1:
kvalitetni.cpp: In function 'double solve()':
kvalitetni.cpp:25:20: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   25 |  assert(v.size()>=2&&op=='+'||op=='*');
      |         ~~~~~~~~~~~^~~~~~~~~

• Subtask 1: 12 / 12
• Subtask 2: 12 / 12
• Subtask 3: 12 / 12
• Subtask 4: 12 / 12
• Subtask 5: 12 / 12
• Subtask 6: 12 / 12
• Subtask 7: 12 / 12
• Subtask 8: 12 / 12
• Subtask 9: 12 / 12
• Subtask 10: 12 / 12