Submission #1116616

#	Time	Username	Problem	Language	Result	Execution time	Memory
1116616		shidou26	Sure Bet (CEOI17_sure)	C++14	20 / 100	7 ms	592 KiB

sure

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

#define endl '\n'
#define all(v) v.begin(), v.end()
#define dbg(v) "[" #v " = " << (v) << "]"

template<typename T> bool maximize(T &a, T b) {
	if(a < b) {
		a = b;
		return true;
	}else return false;
}
template<typename T> bool minimize(T &a, T b) {
	if(a > b) {
		a = b;
		return true;
	}else return false;
}

typedef long long ll;
typedef pair<int, int> ii;
typedef pair<ll, int> li;

const int N = 1e5 + 3;

int n;
double a[N], b[N];

namespace subtask1 {
	double best = 0;

	void backtrack(int p, double totalA, double totalB, int counter) {
		if(p > n) {
			maximize(best, min(totalA - (double)counter, totalB - (double)counter));
			return;
		}
		backtrack(p + 1, totalA, totalB, counter);
		backtrack(p + 1, totalA + a[p], totalB, counter + 1);
		backtrack(p + 1, totalA, totalB + b[p], counter + 1);
		backtrack(p + 1, totalA + a[p], totalB + b[p], counter + 2);
	}

	void solve() {
		backtrack(1, 0, 0, 0);
		cout << fixed << setprecision(4) << best << endl;
	}
};

namespace subtask2 {
	double dpOne[N][5];

	void solve() {

	}
}

void process() {
	if(n <= 10) {
		subtask1::solve();
		return;
	}	

	assert(1 == 0);
}

void input() {
	cin >> n;

	for(int i = 1; i <= n; i++) {
		cin >> a[i] >> b[i];
	}	
}

int main() {
	ios_base::sync_with_stdio(0);
	cin.tie(0);

	#define task "DateALive"
	if(fopen(task".INP", "r")) {
		freopen(task".INP", "r", stdin);
		freopen(task".OUT", "w", stdout);
	}

	input();
	process();

	return 0;
}

Compilation message (stderr)

sure.cpp: In function 'int main()':
sure.cpp:81:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   81 |   freopen(task".INP", "r", stdin);
      |   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
sure.cpp:82:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   82 |   freopen(task".OUT", "w", stdout);
      |   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 20 / 20
• Subtask 2: 0 / 40
• Subtask 3: 0 / 40