oj.uz

Submission #242633

# Submission time Handle Problem Language Result Execution time Memory
242633 2020-06-28T12:22:19 Z SamAnd Global Warming (NOI13_gw) C++17
40 / 40
 386 ms 17364 KB 
#include <bits/stdc++.h>
using namespace std;
#define m_p make_pair
#define all(x) (x).begin(),(x).end()
#define sz(x) ((int)(x).size())
#define fi first
#define se second
typedef long long ll;
mt19937 rnd(chrono::steady_clock::now().time_since_epoch().count());
mt19937 rnf(2106);
const int N = 1000006;

int n;
int h[N];

int p[N];
int fi(int x)
{
    if (x == p[x])
        return x;
    return p[x] = fi(p[x]);
}

void kpc(int x, int y)
{
    x = fi(x);
    y = fi(y);
    p[x] = y;
}

int yans;
bool c[N];

void solv()
{
    scanf("%d", &n);
    for (int i = 0; i < n; ++i)
        scanf("%d", &h[i]);
    vector<pair<int, int> > v;
    for (int i = 0; i < n; ++i)
    {
        v.push_back(m_p(h[i], i));
    }
    sort(all(v));
    reverse(all(v));
    for (int i = 0; i < n; ++i)
    {
        p[i] = i;
    }
    int ans = 0;
    for (int ii = 0; ii < n; ++ii)
    {
        int x = v[ii].se;
        c[x] = true;
        ++yans;
        if (x - 1 >= 0 && c[x - 1])
        {
            kpc(x, x - 1);
            --yans;
        }
        if (x + 1 < n && c[x + 1])
        {
            kpc(x, x + 1);
            --yans;
        }
        if (ii == n - 1 || v[ii + 1].fi != v[ii].fi)
            ans = max(ans, yans);
    }
    printf("%d\n", ans);
}

int main()
{
    #ifdef SOMETHING
    freopen("input.txt", "r", stdin);
    //freopen("output.txt", "w", stdout);
    #endif // SOMETHING
    //ios_base::sync_with_stdio(false), cin.tie(0);
    solv();
    return 0;
}

//while ((double)clock() / CLOCKS_PER_SEC <= 0.9){}

Compilation message

gw.cpp: In function 'void solv()':
gw.cpp:36:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d", &n);
     ~~~~~^~~~~~~~~~
gw.cpp:38:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d", &h[i]);
         ~~~~~^~~~~~~~~~~~~

Subtask #1
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 384 KB Output is correct
2 Correct 5 ms 384 KB Output is correct
3 Correct 5 ms 384 KB Output is correct
4 Correct 5 ms 384 KB Output is correct
5 Correct 5 ms 384 KB Output is correct

Subtask #2
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 31 ms 2156 KB Output is correct
2 Correct 31 ms 2420 KB Output is correct
3 Correct 31 ms 2412 KB Output is correct
4 Correct 30 ms 2420 KB Output is correct
5 Correct 30 ms 2352 KB Output is correct

Subtask #3
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 34 ms 2084 KB Output is correct
2 Correct 25 ms 2164 KB Output is correct
3 Correct 35 ms 2156 KB Output is correct
4 Correct 35 ms 2164 KB Output is correct
5 Correct 33 ms 2164 KB Output is correct

Subtask #4
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 335 ms 17104 KB Output is correct
2 Correct 348 ms 17364 KB Output is correct
3 Correct 386 ms 17104 KB Output is correct
4 Correct 342 ms 17216 KB Output is correct
5 Correct 326 ms 17104 KB Output is correct

Subtask #5
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 363 ms 17104 KB Output is correct
2 Correct 358 ms 17104 KB Output is correct
3 Correct 343 ms 17232 KB Output is correct
4 Correct 291 ms 17204 KB Output is correct
5 Correct 306 ms 17104 KB Output is correct