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Submission #477880

# Submission time Handle Problem Language Result Execution time Memory
477880 2021-10-04T10:09:00 Z sumit_kk10 Global Warming (NOI13_gw) C++17
19 / 40
 860 ms 65540 KB 
#include <bits/stdc++.h>
#define fast ios_base::sync_with_stdio(0);cin.tie(NULL);cout.tie(NULL)
#define ll long long int
#define ld long double
using namespace std;
const int N = 1000003;
const int MOD = 1e9 + 7;

void solve(){
    int n;
    cin >> n;
    int mn = INT_MAX;
    vector<int> a(n);
    for(int i = 0; i < n; ++i){
        cin >> a[i];
        mn = min(mn, a[i]);
    }
    unordered_map<long long, vector<int> > pos;
    for(int i = 0; i < n; ++i)
        pos[a[i]].push_back(i);
    int x = 0;
    for(int j = 0; j < n; ++j){
        int cur = j;
        while(a[cur] > mn and cur < n)
            ++cur;
        if(cur != j){
            j = cur - 1;
            ++x;
        }
    }
    vector<bool> mp(n + 1, 0);
    for(auto k : pos[mn])
        mp[k] = true;
    int ans = x;
    sort(a.begin(), a.end());
    for(int i = 1; i < n; ++i){
        if(a[i] == a[i - 1]) continue;
        for(auto k : pos[a[i]]){
            if(k >= 1 and mp[k - 1] and mp[k + 1]){
                --x;
                mp[k] = true;
                continue;
            }
            if(k >= 1 and mp[k - 1]){
                if(k == n - 1) --x;
                mp[k] = true;
                continue;
            }
            if(mp[k + 1]){
                if(k == 0) --x;
                mp[k] = true;
                continue;
            }
            if(k != 0 and k != n - 1)
                x++;
            mp[k] = true;
        }
        ans = max(ans, x);
    }
    cout << ans << "\n";
}

int main(){
    fast;
    int t = 1;
    // cin >> t;
    while(t--)
        solve();
    return 0;
}

Subtask #1
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 332 KB Output is correct
2 Correct 1 ms 332 KB Output is correct
3 Correct 1 ms 332 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Correct 1 ms 332 KB Output is correct

Subtask #2
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 13 ms 1356 KB Output is correct
2 Correct 15 ms 1376 KB Output is correct
3 Correct 14 ms 1356 KB Output is correct
4 Correct 13 ms 1356 KB Output is correct
5 Correct 13 ms 1364 KB Output is correct

Subtask #3
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 67 ms 9788 KB Output is correct
2 Correct 39 ms 9800 KB Output is correct
3 Correct 74 ms 9848 KB Output is correct
4 Correct 72 ms 9920 KB Output is correct
5 Correct 68 ms 9820 KB Output is correct

Subtask #4
0 / 10.0

# Verdict Execution time Memory Grader output
1 Runtime error 406 ms 65540 KB Execution killed with signal 9
2 Halted 0 ms 0 KB -

Subtask #5
0 / 11.0

# Verdict Execution time Memory Grader output
1 Runtime error 860 ms 54644 KB Memory limit exceeded
2 Halted 0 ms 0 KB -