Submission #880451

#	Time	Username	Problem	Language	Result	Execution time	Memory
880451		Elvin_Fritl	Addk (eJOI21_addk)	C++17	100 / 100	380 ms	14292 KiB

Main

#include <bits/stdc++.h>
using namespace std;

const int N = 1e5 + 5;

#define int long long

long long pre[N];

int n,k;
int a[N];
long long tree[N*3],trep[N*3],tres[N*3];

void built(int v,int l,int r)
{
    if(l > r)
    {
        return;
    }
    if(l == r)
    {
        tree[v] = a[l];
        trep[v] = a[l]*l;
        tres[v] = a[l]*(n - l + 1);
        ///cerr << "l == " << l << "   " << trep[v] << "     " << tres[v] << endl;
        return;
    }
    int mid=(l+r)>>1;
    built(v*2,l,mid);
    built(v*2 + 1,mid+1,r);
    tree[v] = tree[v*2] + tree[v*2 + 1];
    trep[v] = trep[v*2] + trep[v*2 + 1];
    tres[v] = tres[v*2] + tres[v*2 + 1];
}

long long get(int v,int l,int r,int ml,int mr)
{
    if(l > r || ml > r || mr < l)
    {
        return 0;
    }
    if(ml <= l && r <= mr)
    {
        return tree[v];
    }
    int mid=(l+r)>>1;
    return get(v*2 , l , mid , ml , mr) + get(v*2 + 1,mid + 1,r,ml,mr);
}

long long getp(int v,int l,int r,int ml,int mr)
{
    if(l > r || ml > r || mr < l)
    {
        return 0;
    }
    if(ml <= l && r <= mr)
    {
        return trep[v];
    }
    int mid=(l+r)>>1;
    return getp(v*2 , l , mid , ml , mr) + getp(v*2 + 1,mid + 1,r,ml,mr);
}

long long gets(int v,int l,int r,int ml,int mr)
{
    if(l > r || ml > r || mr < l)
    {
        return 0;
    }
    if(ml <= l && r <= mr)
    {
        return tres[v];
    }
    int mid=(l+r)>>1;
    return gets(v*2 , l , mid , ml , mr) + gets(v*2 + 1,mid + 1,r,ml,mr);
}

void update(int v,int l,int r,int ind,int val)
{
    if(l > r)
    {
        return;
    }
    if(l == r)
    {
        a[l] = val;
        tree[v] = a[l];
        trep[v] = a[l]*l;
        tres[v] = a[l]*(n - l + 1);
        ///cerr << "l == " << ind << "   " << trep[v] << "     " << tres[v] << endl;
        return;
    }
    int mid=(l+r)>>1;
    if(ind <= mid){
        update(v*2,l,mid,ind,val);
    }
    else{
        update(v*2 + 1,mid+1,r,ind,val);
    }
    tree[v] = tree[v*2] + tree[v*2 + 1];
    trep[v] = trep[v*2] + trep[v*2 + 1];
    tres[v] = tres[v*2] + tres[v*2 + 1];
}

long long prf(int l, int r){
    long long sum = getp(1,1,n,l,r);
    sum -= (l - 1) * (get(1, 1, n, l, r));
    return sum;
}

long long syf(int l, int r){
    long long sum = gets(1,1,n,l,r);
    ///cerr << "suf  "<< sum <<endl;
    ///assert(sum == sum2);
    sum -= (n - r) * get(1, 1, n, l, r);
    return sum;
}

int32_t main(){
    cin>>n>>k;

    for(int i=1;i<=n;i++){
        cin>>a[i];
        pre[i] = pre[i-1] + a[i];
    }
    built(1,1,n);
    if(n <= 10000 && k == 1){
        int q;
        cin>>q;
        while(q--){
            int ty;
            cin>>ty;
            if(ty == 2){
                int l,r,m;
                cin>>l>>r>>m;
                long long res=0;
                for(int i=l + m - 1; i<=r; i++){
                    res+=pre[i]-pre[i-m];
                }
                cout << res << endl;
            }
            else{
                int m;
                cin>>m;
            }
        }
        return 0;
    }
    int q;
    cin>>q;
    while(q--)
    {
        int ty;
        cin>>ty;
        if(ty == 2){
            int l,r;
            long long m;
            cin>>l>>r>>m;
            assert(r >= l);
            if((r - l + 1) >= m*2){
                
                assert(l + m - 1 <= r - m + 1);
                
                long long res = get(1,1,n,l + (m - 1) , r - (m - 1))*m;


                assert(l + m - 2 <= r - m + 2);

                res += prf(l, l + m - 2);
                res += syf(r - m + 2, r);
                cout << res << endl;
            }
            else{
                int cur_m = r - l + 2 - m;
                assert(cur_m <= m && cur_m > 0);
                ///cur_m

                long long res = 0;
                ///assert(l + cur_m == r - cur_m);
                res += prf(l, l + cur_m - 1);
                res += syf(r - cur_m + 1, r);
                ///cerr << r - cur_m << "   " <<  l + cur_m << endl;
                res += get(1, 1, n, l + cur_m, r - cur_m) * cur_m;
                ///cerr<<"3    ";
                cout << res << endl;
            }
        }
        else{
            vector<int>ind;
            for(int i=0;i<k;i++){
                int x;
                cin>>x;
                ind.push_back(x);
            }
            int fi = a[ind[0]];
            for(int i=1;i<k;i++){
                update(1,1,n,ind[i-1],a[ind[i]]);
            }
            update(1,1,n,ind[k-1],fi);
        }
    }
}

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