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Submission #1083870

# Submission time Handle Problem Language Result Execution time Memory
1083870 2024-09-04T11:29:18 Z lamlamlam Feast (NOI19_feast) C++14
4 / 100
 76 ms 104344 KB 
#include <bits/stdc++.h>
using namespace std;
#define endl '\n'
struct node
{
    long long pre_max,pre_min,suf_max,suf_min,best,worst,sum;
    int l_best,r_best,l_worst,r_worst,r_pre_max,r_pre_min,l_suf_max,l_suf_min,lazy;
    node operator + (const node &o) const
    {
        node res;
        res.sum = sum + o.sum;

        res.pre_max = max(pre_max,sum+o.pre_max);
        if(res.pre_max == pre_max) res.r_pre_max = r_pre_max;
        else res.r_pre_max = o.r_pre_max;

        res.pre_min = min(pre_min,sum+o.pre_min);
        if(res.pre_min == pre_min) res.r_pre_min = r_pre_min;
        else res.r_pre_min = o.r_pre_min;

        res.suf_max = max(o.sum+suf_max,o.suf_max);
        if(res.suf_max == o.sum+suf_max) res.l_suf_max = l_suf_max;
        else res.l_suf_max = o.l_suf_max;

        res.suf_min = min(o.sum+suf_min,o.suf_min);
        if(res.suf_min == o.sum+suf_min) res.l_suf_min = l_suf_min;
        else res.l_suf_min = o.l_suf_min;

        res.best = max({best,o.best,suf_max+o.pre_max});
        if(res.best == best){
            res.l_best = l_best;
            res.r_best = r_best;
        }
        else if(res.best == o.best){
            res.l_best = o.l_best;
            res.r_best = o.r_best;
        }
        else{
            res.l_best = l_suf_max;
            res.r_best = o.r_pre_max;
        }

        res.worst = min({worst,o.worst,suf_min+o.pre_min});
        if(res.worst == worst){
            res.l_worst = l_worst;
            res.r_worst = r_worst;
        }
        else if(res.worst == o.worst){
            res.l_worst = o.l_worst;
            res.r_worst = o.r_worst;
        }
        else{
            res.l_worst = l_suf_min;
            res.r_worst = o.r_pre_min;
        }
        return res;
    }
};
node rev(node x)
{
    x.pre_max = -x.pre_max;
    x.pre_min = -x.pre_min;
    x.suf_max = -x.suf_max;
    x.suf_min = -x.suf_min;
    x.best = -x.best;
    x.worst = -x.worst;
    x.sum = -x.sum;
    swap(x.pre_max,x.pre_min);
    swap(x.suf_max,x.suf_min);
    swap(x.best,x.worst);
    swap(x.l_best,x.l_worst);
    swap(x.r_best,x.r_worst);
    swap(x.r_pre_max,x.r_pre_min);
    swap(x.l_suf_max,x.l_suf_min);
    return x;
}
const int MN = 3e5+5;
const long long inf = 1e18;
int n,k,a[MN];
long long ans;
node st[MN*4];
void fix(int v,int l,int r)
{
    if(st[v].lazy%2==0) return;
    st[v] = rev(st[v]);
    st[v].lazy = 0;
    if(l==r) return;
    st[v*2].lazy++;
    st[v*2+1].lazy++;
}
void build(int v,int l,int r)
{
    if(l==r){
        st[v].pre_max = st[v].pre_min = st[v].suf_max = st[v].suf_min = st[v].best = st[v].worst = st[v].sum = a[l];
        st[v].l_best = st[v].r_best = st[v].l_worst = st[v].r_worst = st[v].r_pre_max = st[v].r_pre_min = st[v].l_suf_max = st[v].l_suf_min = l;
        return;
    }
    int mid = (l+r) >> 1;
    build(v*2,l,mid);
    build(v*2+1,mid+1,r);
    st[v] = st[v*2] + st[v*2+1];
}
void upd(int v,int l,int r,int x,int y)
{
    fix(v,l,r);
    if(x>r or y<l) return;
    if(x<=l and r<=y){
        ans += st[v].sum;
        st[v].lazy++;
        fix(v,l,r);
        return;
    }
    int mid = (l+r) >> 1;
    upd(v*2,l,mid,x,y);
    upd(v*2+1,mid+1,r,x,y);
    st[v] = st[v*2] + st[v*2+1];
}

signed main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cin >> n >> k;
    for(int i=1; i<=n; i++) cin >> a[i];
    build(1,1,n);
    while(k--){
        fix(1,1,n);
        int l = st[1].l_best;
        int r = st[1].r_best;
        //cout << l << ' ' << r << ' ' << st[1].best << ' ' << st[1].worst << endl;
        if(st[1].best<=0) break;
        upd(1,1,n,l,r);
    }
    cout << ans;
    cerr << "\nTime: " << clock();
}

Subtask #1
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 64 ms 104016 KB Output is correct
2 Correct 64 ms 104196 KB Output is correct
3 Correct 68 ms 104240 KB Output is correct
4 Correct 66 ms 104248 KB Output is correct
5 Correct 64 ms 104144 KB Output is correct
6 Correct 63 ms 103948 KB Output is correct
7 Correct 67 ms 104024 KB Output is correct
8 Correct 62 ms 104344 KB Output is correct
9 Correct 67 ms 104056 KB Output is correct
10 Correct 65 ms 104276 KB Output is correct

Subtask #2
0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 54 ms 102828 KB Output is correct
2 Correct 57 ms 102976 KB Output is correct
3 Incorrect 59 ms 102740 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #3
0 / 18.0

# Verdict Execution time Memory Grader output
1 Incorrect 76 ms 104300 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 2392 KB Output is correct
2 Incorrect 0 ms 348 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #5
0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 2392 KB Output is correct
2 Incorrect 0 ms 348 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #6
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 2392 KB Output is correct
2 Incorrect 0 ms 348 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #7
0 / 29.0

# Verdict Execution time Memory Grader output
1 Correct 64 ms 104016 KB Output is correct
2 Correct 64 ms 104196 KB Output is correct
3 Correct 68 ms 104240 KB Output is correct
4 Correct 66 ms 104248 KB Output is correct
5 Correct 64 ms 104144 KB Output is correct
6 Correct 63 ms 103948 KB Output is correct
7 Correct 67 ms 104024 KB Output is correct
8 Correct 62 ms 104344 KB Output is correct
9 Correct 67 ms 104056 KB Output is correct
10 Correct 65 ms 104276 KB Output is correct
11 Correct 54 ms 102828 KB Output is correct
12 Correct 57 ms 102976 KB Output is correct
13 Incorrect 59 ms 102740 KB Output isn't correct
14 Halted 0 ms 0 KB -