Submission #1221728

#	Time	Username	Problem	Language	Result	Execution time	Memory
1221728		Robert_junior	Addk (eJOI21_addk)	C++20	100 / 100	80 ms	4936 KiB

Main

#include<bits/stdc++.h>
using namespace std;
#define int long long
#define all(x) x.begin(), x.end()
#define ins insert
#define pb push_back
#define F first
#define S second
const int N = 1e6+4, M = 5e5 + 7;
const int mod = 1e9 + 7;
int a[N], pf[N], pf1[N], sf[N], t[N][3];
int n, k, q;
void upd(int idx, int j, int x){
    for(; idx <= n; idx |= (idx + 1)){
        t[idx][j] += x;
    }
}
int get(int r, int j){
    int res = 0;
    for(; r > 0; r = (r & (r + 1)) - 1){
        res += t[r][j];
    }
    return res; 
}
int get(int l, int r, int j){
    if(l > r) return 0;
    return get(r, j) - get(l - 1, j);
}
void solve(){
    cin>>n>>k;
    int a[n + 1];
    for(int i = 1; i <= n; i++){
        cin>>a[i];
        upd(i, 0, a[i]);
        upd(i, 1, a[i] * i);
        upd(i, 2, a[i] * (n - i + 1));
    }
    cin>>q;
    while(q--){
        int f;
        cin>>f;
        if(f == 1){
            vector<int>v, v1;
            for(int i = 0; i < k; i++){
                int x;
                cin>>x;
                v.pb(x);
                v1.pb(a[x]);
            }
            for(int i = 0; i < k; i++){
                upd(v[i], 0, -a[v[i]]);
                upd(v[i], 1, -(a[v[i]] * v[i]));
                upd(v[i], 2, -(a[v[i]]) * (n - v[i] + 1));
                a[v[i]] = v1[(i + 1) % k];
                upd(v[i], 0, a[v[i]]);
                upd(v[i], 1, (a[v[i]] * v[i]));
                upd(v[i], 2, (a[v[i]]) * (n - v[i] + 1));
            }
        }
        else{
            int sum = 0, l, r, m, l1, r1;
            cin>>l>>r>>m;
            int len = r - l + 1;
            int mid = min(m, (r - l + 1) - m + 1);
            if(mid * 2 <= len){
                //sum += (pf[r - mid] - pf[l + mid - 1]) * mid;
                sum += get(l + mid, r - mid, 0) * mid;
                //sum += (pf1[l + mid - 1] - pf1[l - 1]) - (pf[l + mid - 1] - pf[l - 1]) * (l - 1);
                sum += get(l, l + mid - 1, 1) - get(l, l + mid - 1, 0) * (l - 1);
                //sum += (sf[r - mid + 1] - sf[r + 1]) - (pf[r] - pf[r - mid]) * (n - r);
                sum += get(r - mid + 1, r, 2) - get(r - mid + 1, r, 0) * (n - r);
            }
            else{
                for(int i = l; i <= r; i++){
                    sum += a[i] * min({i - l + 1, r - i + 1, mid});
                }
            }
            cout<<sum<<'\n';
        }
    }
}
main(){
    ios_base :: sync_with_stdio(false);
    cin.tie(nullptr); 
    int t = 1;
    //cin>>t; 
    for(int i = 1; i <= t; i++){
        //cout<<"Case "<<i<<": ";
        solve();
    }
}

Compilation message (stderr)

Main.cpp:82:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   82 | main(){
      | ^~~~

• Subtask 1: 36 / 36
• Subtask 2: 56 / 56
• Subtask 3: 8 / 8