Submission #1123790

#	Time	Username	Problem	Language	Result	Execution time	Memory
1123790		LTTrungCHL	Pilot (NOI19_pilot)	C++20	100 / 100	585 ms	42852 KiB

pilot

///***LTT***///
/// ->NHAT QUOC GIA<- ///
#include<bits/stdc++.h>
//#pragma GCC optimize ("O3")
//#pragma GCC optimize ("unroll-loops")
//#pragma GCC target("popcnt")
//#define int long long
#define endl "\n"
#define F first
#define S second
#define pb push_back
using namespace std;
//vector <int> lg2;
//void LOG_ARR(int n){
//    lg2.resize(n + 3);
//    for (int i = 1;i <= n;++i){
//        lg2[i] = __lg(i);
//    }
//}
const long long oo = 1e9+7;
const int N = 1000003;
int n, q;
int h[N];
pair <int, int> y[N];
int parent[N], sz[N];
long long ans;
long long res[N];
int finds(int u){
    if (u == parent[u]) return u;
    int pu = finds(parent[u]);
    parent[u] = pu;
    return pu;
}
long long sum(long long x){
    return x * (x + 1)/2;
}
void unions(int u, int v){
    u = finds(u);
    v = finds(v);
    if (u != v){
        if (sz[u] < sz[v]) swap(u, v);
        ans -= sum(sz[u]);
        ans -= sum(sz[v]);
        parent[v] = u;
        sz[u] += sz[v];
        ans += sum(sz[u]);
    }
    return;
}
void check(int id, int val){
    if (id - 1 and h[id - 1] <= val){
        unions(id, id - 1);
    }
    if (id + 1 <= n and h[id + 1] <= val){
        unions(id, id + 1);
    }
    return;
}
void solve(){
    cin >> n >> q;
    priority_queue <pair <int,int>> pq;
    for (int i = 1;i <= n;++i){
        cin >> h[i];
        parent[i] = i;
        sz[i] = 1;
        pq.push({-h[i], i});
    }
    for (int i = 1;i <= q;++i){
        cin >> y[i].F;
        y[i].S = i;
    }
    sort(y + 1, y + q + 1);
    for (int i = 1;i <= q;++i){
        int val = y[i].F;
        int idx = y[i].S;
        while (!pq.empty() and -pq.top().F <= val){
            int id = pq.top().S;
            pq.pop();
            ++ans;
            check(id, val);
        }
        //
        res[idx] = ans;
    }
    for (int i = 1;i <= q;++i){
        cout << res[i] <<"\n";
    }
    return;
}
int main(){
    ios_base::sync_with_stdio(NULL);
    cin.tie(NULL);
    cout.tie(NULL);
    if (fopen("npt.inp", "r")){
        freopen("npt.inp", "r", stdin);
        freopen("npt.out", "w", stdout);
    }
//    int t;
//    cin >> t;
//    while(t--){
    solve();
//    }
    return 0;
}

Compilation message (stderr)

pilot.cpp: In function 'int main()':
pilot.cpp:95:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   95 |         freopen("npt.inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~
pilot.cpp:96:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   96 |         freopen("npt.out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 3 / 3
• Subtask 2: 10 / 10
• Subtask 3: 12 / 12
• Subtask 4: 15 / 15
• Subtask 5: 5 / 5
• Subtask 6: 9 / 9
• Subtask 7: 14 / 14
• Subtask 8: 10 / 10
• Subtask 9: 11 / 11
• Subtask 10: 11 / 11