Submission #1027173

#	Time	Username	Problem	Language	Result	Execution time	Memory
1027173		cnn008	Sure Bet (CEOI17_sure)	C++17	0 / 100	0 ms	2396 KiB

sure

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

#ifdef N_N_C
#include "debug.h"
#else
#define cebug(...) "Arya"
#endif

#define int long long

const int N=1e5+5;
const int mod=1e9+7;

int n;
double a[N],b[N],p1[N],p2[N];
void sol(){
	cin>>n;
	for(int i=1; i<=n; i++) cin>>a[i]>>b[i];
	sort(a+1,a+n+1);
	sort(b+1,b+n+1);
	reverse(a+1,a+n+1);
	reverse(b+1,b+n+1);
	for(int i=1; i<=n; i++) p1[i]=p1[i-1]+a[i];
	for(int i=1; i<=n; i++) p2[i]=p2[i-1]+b[i];
	auto f2 = [&](double x) -> int{
		int l=1,r=n,ans=-1;
		while(l<=r){
			int mid=(l+r)>>1;
			if(p2[mid]>=x){
				ans=mid;
				r=mid-1;
			}else l=mid+1;
		}
		return ans;
	};
	auto f1 = [&](double x) -> int{
		int l=1,r=n,ans=-1;
		while(l<=r){
			int mid=(l+r)>>1;
			if(p1[mid]>=x){
				ans=mid;
				r=mid-1;
			}else l=mid+1;
		}
		return ans;
	};
	double ans=0;
	for(int i=1; i<=n; i++){
		int j=f2(p1[i]);
		if(j==-1) continue;
		ans=max(ans,p1[i]-i-j);
	}
	for(int i=1; i<=n; i++){
		int j=f1(p2[i]);
		if(j==-1) continue;
		ans=max(ans,p2[i]-i-j);
	}
	cout<<fixed<<setprecision(6)<<ans;
}
signed main(){
	ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    // freopen(".inp", "r", stdin);
    // freopen(".out", "w", stdout);
    int tt=1;
    //cin>>tt; 
    while(tt--){
    	sol();
    }
    cerr << "\nTime elapsed: " << 1000.0 * clock() / CLOCKS_PER_SEC << " ms.\n";
    return 0;
}
/**  /\_/\
*   (= ._.)
*   / >💖 \>💕
**/

Compilation message (stderr)

sure.cpp:74:9: warning: "/*" within comment [-Wcomment]
   74 | /**  /\_/\
      |

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