/// tree bends in youth
/// 24 .10.2023
/// success is doing same thing in every single day!!!
#include <bits/stdc++.h>
#define ll long long
#define pb push_back
#define all(x) x.begin(), x.end()
#define F first
#define S second
using namespace std;
const ll N =2e5+ 5;
const ll NN =2e6 + 5;
const ll INF = -1e1;
const ll MOD = 1e9 + 7;
const ll LG = 18;
const ll k = 316;
int n;
double a[N],b[N],pl[N],pr[N];
void solve(){
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);
int z = 0,x = 0;
for(int i = 1;i <= n;i++){
pr[i] = pr[i - 1] + b[i];
pl[i] = pl[i - 1] + a[i];
}
double ans = 0;
for(int i = 1;i <= 2 * n;i++){
for(int j = 0;j <=i;j++){
double sum = double(i) + double(j);
double z = pr[i - j];
double x = pl[j];
ans = max(ans,min(z,x)-i);
//if( i == 3 ) cout << z << " " << x << " " << j << " " << ans << '\n' ;
}
}
cout << fixed << detprecision(4) << ans;
}
main (){
ios_base::sync_with_stdio(0);
cin.tie(0);
// freopen("input.txt","r",stdin);
// freopen("output.txt","w",stdout);
ll abd= 1;
// cin >> abd;
for(ll i = 1;i <= abd;i++){
// cout << "Case " << i << ":\n";
solve();
}
}
Compilation message
sure.cpp: In function 'void solve()':
sure.cpp:36:20: warning: unused variable 'sum' [-Wunused-variable]
36 | double sum = double(i) + double(j);
| ^~~
sure.cpp:43:22: error: 'detprecision' was not declared in this scope
43 | cout << fixed << detprecision(4) << ans;
| ^~~~~~~~~~~~
sure.cpp:28:9: warning: unused variable 'z' [-Wunused-variable]
28 | int z = 0,x = 0;
| ^
sure.cpp:28:15: warning: unused variable 'x' [-Wunused-variable]
28 | int z = 0,x = 0;
| ^
sure.cpp: At global scope:
sure.cpp:45:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
45 | main (){
| ^~~~
