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Submission #891144

# Submission time Handle Problem Language Result Execution time Memory
891144 2023-12-22T08:43:43 Z vjudge1 Sure Bet (CEOI17_sure) C++17
100 / 100
 76 ms 8528 KB 
#include<bits/stdc++.h>

#pragma GCC target("avx2")
#pragma GCC optimize("Ofast")
#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")

using namespace std;

void dgb_out() { cerr << "\n"; }
template<typename Head, typename... Tail>
void dbg_out(Head H, Tail... T) { cerr << " " << H; dgb_out(T...); }
#define dbg(...) cerr << "(" << #__VA_ARGS__ << "):", dbg_out(__VA_ARGS__)
 
#define fast ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0);
#define file(s) freopen(s".in", "r", stdin);freopen(s".out", "w", stdout);
#define all(v) v.begin(),v.end()
#define rall(v) v.rbegin(),v.rend()
#define pb push_back
#define pf push_front
#define ppb pop_back
#define ft first
#define sd second
#define ll long long
#define pll pair<ll,ll>
const int N = 5e5 + 10;
const int M = 2e7 + 5;
const int B = 316;
const ll msize = 2;
const ll mod1 = 1e9 + 7;
const ll mod2 = 998244353;
const long double Phi = acos(-1);
const long long inf = 2e9;

ll binmul(ll x, ll ti, ll m);
ll binpow(ll x, ll ti, ll m);

ll n;
long double a[N], b[N];

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

    sort(a + 1, a + n + 1); reverse(a + 1, a + n + 1);
    sort(b + 1, b + n + 1); reverse(b + 1, b + n + 1);

    int i = 1, j = 1;
    long double ans = 0, cnt = 0, suma = 0, sumb = 0;
    while (i <= n || j <= n) {
        if ((j <= n && suma >= sumb) || (i == n + 1)) {
            sumb += b[j ++];
        } else {
            suma += a[i ++];
        }
        ++ cnt;

        ans = max(ans, min(suma, sumb) - cnt);
    }
    cout << fixed << setprecision(4) << ans;
}  

int main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0); cout.tie(0);
    srand(time(NULL));

    //file("monsters");

    int tt = 1;
    // cin >> tt;
    for (int i = 1; i <= tt; ++ i) {
        solve();
    }

    return 0;
} 


// Template functions
ll binmul(ll x, ll ti, ll m) { ll res = 0;while (ti){if(ti & 1)res += x;x += x;ti >>= 1; x %= m; res %= m;} return res;}
ll binpow(ll x, ll ti, ll m) { ll res = 1;while (ti){if(ti & 1)res=binmul(res,x,m);x=binmul(x,x,m);ti >>= 1; x %= m; res %= m;} return res;}

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2392 KB Output is correct
2 Correct 1 ms 2396 KB Output is correct
3 Correct 1 ms 2396 KB Output is correct
4 Correct 1 ms 2396 KB Output is correct
5 Correct 1 ms 2516 KB Output is correct
6 Correct 1 ms 2396 KB Output is correct

Subtask #2
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2392 KB Output is correct
2 Correct 1 ms 2396 KB Output is correct
3 Correct 1 ms 2396 KB Output is correct
4 Correct 1 ms 2396 KB Output is correct
5 Correct 1 ms 2516 KB Output is correct
6 Correct 1 ms 2396 KB Output is correct
7 Correct 1 ms 2396 KB Output is correct
8 Correct 1 ms 2396 KB Output is correct
9 Correct 1 ms 2392 KB Output is correct
10 Correct 1 ms 2396 KB Output is correct
11 Correct 1 ms 2396 KB Output is correct
12 Correct 1 ms 2392 KB Output is correct
13 Correct 1 ms 2396 KB Output is correct
14 Correct 1 ms 2560 KB Output is correct
15 Correct 1 ms 2396 KB Output is correct
16 Correct 1 ms 2524 KB Output is correct

Subtask #3
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2392 KB Output is correct
2 Correct 1 ms 2396 KB Output is correct
3 Correct 1 ms 2396 KB Output is correct
4 Correct 1 ms 2396 KB Output is correct
5 Correct 1 ms 2516 KB Output is correct
6 Correct 1 ms 2396 KB Output is correct
7 Correct 1 ms 2396 KB Output is correct
8 Correct 1 ms 2396 KB Output is correct
9 Correct 1 ms 2392 KB Output is correct
10 Correct 1 ms 2396 KB Output is correct
11 Correct 1 ms 2396 KB Output is correct
12 Correct 1 ms 2392 KB Output is correct
13 Correct 1 ms 2396 KB Output is correct
14 Correct 1 ms 2560 KB Output is correct
15 Correct 1 ms 2396 KB Output is correct
16 Correct 1 ms 2524 KB Output is correct
17 Correct 70 ms 8020 KB Output is correct
18 Correct 71 ms 7924 KB Output is correct
19 Correct 73 ms 8148 KB Output is correct
20 Correct 72 ms 8024 KB Output is correct
21 Correct 75 ms 8524 KB Output is correct
22 Correct 70 ms 8020 KB Output is correct
23 Correct 71 ms 8016 KB Output is correct
24 Correct 72 ms 8320 KB Output is correct
25 Correct 71 ms 8020 KB Output is correct
26 Correct 76 ms 8528 KB Output is correct