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Submission #1027367

# Submission time Handle Problem Language Result Execution time Memory
1027367 2024-07-19T04:59:38 Z vjudge1 Sure Bet (CEOI17_sure) C++17
100 / 100
 50 ms 8284 KB 
#pragma GCC optimize("Ofast")
#pragma GCC optimize("unroll-loops")
#include <bits/stdc++.h>
using namespace std;
#define int long long
// #define double long double
 
#define endl '\n'
#define fastIO ios_base::sync_with_stdio(false); cin.tie(nullptr); cout.tie(nullptr);
#define setmin(x, y) x = min((x), (y))
#define setmax(x, y) x = max((x), (y))
#define sqr(x) ((x) * (x))
#define fi first
#define se second
 
// mt19937 hdp(chrono::high_resolution_clock::now().time_since_epoch().count());
// int rand(int l, int r){return l + ((hdp() % (r - l + 1)) + r - l + 1) % (r - l + 1);}
 
const int NM = 1e6 + 5;
const int mod = 1e6 + 3;
const int inf = 1e9 + 1;

int n;
double a[NM], b[NM], ans, cur, A, B;

signed main()
{
    if (fopen("in.txt", "r")) {
        freopen("in.txt","r",stdin);
        freopen("out.txt","w",stdout);
    }
    fastIO
    cin >> n;
    for (int i = 1; i <= n; i++)
        cin >> a[i] >> b[i];
    sort(a + 1, a + 1 + n, greater<double>());
    sort(b + 1, b + 1 + n, greater<double>());
    int pa = 0, pb = 0;
    while (pa < n || pb < n)
    {
        if (pa == n)
        {
            ++pb;
            B += b[pb];
        }
        else if (pb == n)
        {
            ++pa;
            A += a[pa];
        }
        else if (A <= B)
        {
            ++pa;
            A += a[pa];
        }
        else
        {
            ++pb;
            B += b[pb];
        }
        setmax(ans, min(A, B) - pa - pb);
    }
    cout << fixed << setprecision(4) << ans;
}

Compilation message

sure.cpp: In function 'int main()':
sure.cpp:29:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   29 |         freopen("in.txt","r",stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~
sure.cpp:30:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   30 |         freopen("out.txt","w",stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~

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 2392 KB Output is correct
3 Correct 1 ms 2392 KB Output is correct
4 Correct 0 ms 2396 KB Output is correct
5 Correct 0 ms 2396 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 2392 KB Output is correct
3 Correct 1 ms 2392 KB Output is correct
4 Correct 0 ms 2396 KB Output is correct
5 Correct 0 ms 2396 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 2564 KB Output is correct
10 Correct 1 ms 2396 KB Output is correct
11 Correct 0 ms 2396 KB Output is correct
12 Correct 2 ms 2396 KB Output is correct
13 Correct 1 ms 2396 KB Output is correct
14 Correct 1 ms 2396 KB Output is correct
15 Correct 1 ms 2396 KB Output is correct
16 Correct 1 ms 2396 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 2392 KB Output is correct
3 Correct 1 ms 2392 KB Output is correct
4 Correct 0 ms 2396 KB Output is correct
5 Correct 0 ms 2396 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 2564 KB Output is correct
10 Correct 1 ms 2396 KB Output is correct
11 Correct 0 ms 2396 KB Output is correct
12 Correct 2 ms 2396 KB Output is correct
13 Correct 1 ms 2396 KB Output is correct
14 Correct 1 ms 2396 KB Output is correct
15 Correct 1 ms 2396 KB Output is correct
16 Correct 1 ms 2396 KB Output is correct
17 Correct 47 ms 8028 KB Output is correct
18 Correct 47 ms 8280 KB Output is correct
19 Correct 47 ms 8016 KB Output is correct
20 Correct 48 ms 8044 KB Output is correct
21 Correct 50 ms 8276 KB Output is correct
22 Correct 46 ms 7916 KB Output is correct
23 Correct 48 ms 8024 KB Output is correct
24 Correct 47 ms 8028 KB Output is correct
25 Correct 49 ms 8028 KB Output is correct
26 Correct 50 ms 8284 KB Output is correct