Submission #938243

#	Time	Username	Problem	Language	Result	Execution time	Memory
938243		vjudge1	Sure Bet (CEOI17_sure)	C++17	20 / 100	110 ms	428 KiB

sure

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#define pii pair<int,int>
using namespace __gnu_pbds;
using namespace std;
#define pb push_back
#define all(x) x.begin(),x.end()
#define rall(x) x.rbegin(),x.rend()
#define f first
#define int double
#define s second
#define pii pair<int,int>
template<class T>bool umax(T &a,T b){if(a<b){a=b;return true;}return false;}
template<class T>bool umin(T &a,T b){if(b<a){a=b;return true;}return false;}
typedef tree<int, null_type, less_equal<int>, rb_tree_tag,
	tree_order_statistics_node_update> ordered_set;
const int N=3e5 + 5	;
const int inf = 1e17 + 7;
const int mod = 998244353;

long long binpow(long long n, long long m){
	
	if(m == 0)return 1;
	else if(m % 2 == 0){
		long long sum = binpow(n,m/2);
		return sum * sum;
	}
	else{
		return binpow(n,m-1)*n;
	}

}

void solve(){
	
	int n,m,k;
	
	cin>>n;
	
	vector<array<int,2>>v(n);
	
	for(int i = 0;i<n;i++){
		int a,b;
		cin>>a>>b;
		v[i][0] = a;
		v[i][1] = b;
	}
	
	int ans = 0;
	
	for(long long mask = 0;mask < binpow(4,n);mask+=1){
		int sum1 = 0, sum2 = 0;
		int cnt = 0;
		for(int i = 0;i<n;i++){
			if(((mask/binpow(4,i))%4)==1){
				cnt += 1;
				sum1 +=v[i][0];
			}
			if(((mask/binpow(4,i))%4)==2){
				cnt += 1;
				sum2 +=v[i][1];
			}
			if(((mask/binpow(4,i))%4)==3){
				cnt += 1;
				sum1 +=v[i][0];
				
				cnt += 1;
				sum2 += v[i][1];
			}
		}
		
		umax(ans,min(sum2-cnt,sum1-cnt));
		
	}
	
	printf("%.4lf",(double)ans);
	
}

signed main()
{
//	freopen("seq.in", "r", stdin);
//  freopen("seq.out", "w", stdout);
	ios_base::sync_with_stdio(0);cin.tie(NULL);cout.tie(NULL);
	int tt=1;//cin>>tt>>n;
	while(tt--)solve();

}

Compilation message (stderr)

sure.cpp: In function 'void solve()':
sure.cpp:37:8: warning: unused variable 'm' [-Wunused-variable]
   37 |  int n,m,k;
      |        ^
sure.cpp:37:10: warning: unused variable 'k' [-Wunused-variable]
   37 |  int n,m,k;
      |          ^

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