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Submission #674401

# Submission time Handle Problem Language Result Execution time Memory
674401 2022-12-24T02:54:37 Z vjudge1 Global Warming (NOI13_gw) C++17
6 / 40
 810 ms 8132 KB 
#include <bits/stdc++.h>
using namespace std;

#define F first
#define S second
#define pb push_back
#define all(a) a.begin(), a.end()

typedef long long ll;
typedef pair<int, int> ii;

const int N = 1e6 + 5;
const int mod = 1e9 + 7;
int n;
int a[N], tmp[N];

int check(int k)
{
    int res = 0;
    for(int i = 1; i <= n; i++) 
        tmp[i] = (a[i] > k);
    for(int i = 1; i <= n + 1; i++) 
        res += (tmp[i] == 0 && tmp[i - 1] == 1);
    return res;
}

void solve()
{
    cin >> n;
    for(int i = 1; i <= n; i++) 
        cin >> a[i];
    int l = 0, r = 2e9, res = 0;
    while(r - l >= 3)
    {
        int midl = l + (r - l) / 3;
        int midr = r - (r - l) / 3;
        if(check(midl) >= check(midr))
            r = midr;
        else
            l = midl;
    }
    for(int i = l; i <= r; i++) res = max(res, check(i));
    
    l = 0, r = 2e9;
    while(r - l >= 3)
    {
        int midl = l + (r - l) / 3;
        int midr = r - (r - l) / 3;
        if(check(midl) > check(midr))
            r = midr;
        else
            l = midl;
    }
    for(int i = l; i <= r; i++) res = max(res, check(i));
    cout << res;
}

signed main()
{
    cin.tie(0)->sync_with_stdio(0);
    int t = 1;
    // cin >> t;
    while(t--) solve();
    return 0;
}

Subtask #1
0 / 6.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 340 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 42 ms 1048 KB Output is correct
2 Correct 41 ms 1108 KB Output is correct
3 Correct 47 ms 1108 KB Output is correct
4 Correct 41 ms 1108 KB Output is correct
5 Correct 42 ms 1108 KB Output is correct

Subtask #3
0 / 7.0

# Verdict Execution time Memory Grader output
1 Incorrect 74 ms 1108 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 810 ms 8128 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 789 ms 8132 KB Output is correct
2 Incorrect 791 ms 8124 KB Output isn't correct
3 Halted 0 ms 0 KB -