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답안 #1083890

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
1083890 2024-09-04T12:55:31 Z ttttttttttttth Feast (NOI19_feast) C++17
100 / 100
 160 ms 104804 KB 
#include <bits/stdc++.h>
using namespace std;
#define endl '\n'
struct node
{
    long long pre_max = 0,pre_min = 0,suf_max = 0,suf_min = 0,best = 0,worst = 0,sum = 0;
    int l_best = 0,r_best = 0,l_worst = 0,r_worst = 0,r_pre_max = 0,r_pre_min = 0,l_suf_max = 0,l_suf_min = 0,lazy = 0;
    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);
    #define task "NOI19_feastt"
    if(fopen(task".inp","r")){
        freopen(task".inp","r",stdin);
        freopen(task".out","w",stdout);
    }
    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();
}

Compilation message

feast.cpp: In function 'int main()':
feast.cpp:125:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  125 |         freopen(task".inp","r",stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
feast.cpp:126:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  126 |         freopen(task".out","w",stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
4.0 / 4.0

# 결과 실행 시간 메모리 Grader output
1 Correct 62 ms 104404 KB Output is correct
2 Correct 63 ms 102736 KB Output is correct
3 Correct 67 ms 102772 KB Output is correct
4 Correct 73 ms 102872 KB Output is correct
5 Correct 61 ms 102736 KB Output is correct
6 Correct 63 ms 102740 KB Output is correct
7 Correct 64 ms 102824 KB Output is correct
8 Correct 63 ms 102732 KB Output is correct
9 Correct 64 ms 104528 KB Output is correct
10 Correct 92 ms 104464 KB Output is correct

Subtask #2
8.0 / 8.0

# 결과 실행 시간 메모리 Grader output
1 Correct 58 ms 101204 KB Output is correct
2 Correct 59 ms 102792 KB Output is correct
3 Correct 61 ms 102740 KB Output is correct
4 Correct 52 ms 101204 KB Output is correct
5 Correct 67 ms 102740 KB Output is correct
6 Correct 51 ms 102736 KB Output is correct
7 Correct 92 ms 101040 KB Output is correct
8 Correct 68 ms 102808 KB Output is correct
9 Correct 66 ms 102696 KB Output is correct
10 Correct 78 ms 102844 KB Output is correct

Subtask #3
18.0 / 18.0

# 결과 실행 시간 메모리 Grader output
1 Correct 73 ms 103068 KB Output is correct
2 Correct 70 ms 104788 KB Output is correct
3 Correct 104 ms 104792 KB Output is correct
4 Correct 71 ms 104656 KB Output is correct
5 Correct 71 ms 104660 KB Output is correct
6 Correct 75 ms 104788 KB Output is correct
7 Correct 69 ms 102944 KB Output is correct
8 Correct 64 ms 103248 KB Output is correct
9 Correct 69 ms 104804 KB Output is correct
10 Correct 70 ms 102996 KB Output is correct

Subtask #4
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 1 ms 2396 KB Output is correct
4 Correct 1 ms 2392 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 1 ms 2396 KB Output is correct
7 Correct 1 ms 2516 KB Output is correct
8 Correct 1 ms 2392 KB Output is correct
9 Correct 1 ms 2476 KB Output is correct
10 Correct 1 ms 472 KB Output is correct

Subtask #5
11.0 / 11.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 1 ms 2396 KB Output is correct
4 Correct 1 ms 2392 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 1 ms 2396 KB Output is correct
7 Correct 1 ms 2516 KB Output is correct
8 Correct 1 ms 2392 KB Output is correct
9 Correct 1 ms 2476 KB Output is correct
10 Correct 1 ms 472 KB Output is correct
11 Correct 1 ms 2396 KB Output is correct
12 Correct 0 ms 468 KB Output is correct
13 Correct 1 ms 2396 KB Output is correct
14 Correct 1 ms 2524 KB Output is correct
15 Correct 1 ms 348 KB Output is correct
16 Correct 1 ms 348 KB Output is correct
17 Correct 0 ms 2516 KB Output is correct
18 Correct 1 ms 2396 KB Output is correct
19 Correct 1 ms 348 KB Output is correct
20 Correct 1 ms 2396 KB Output is correct

Subtask #6
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 1 ms 2396 KB Output is correct
4 Correct 1 ms 2392 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 1 ms 2396 KB Output is correct
7 Correct 1 ms 2516 KB Output is correct
8 Correct 1 ms 2392 KB Output is correct
9 Correct 1 ms 2476 KB Output is correct
10 Correct 1 ms 472 KB Output is correct
11 Correct 1 ms 2396 KB Output is correct
12 Correct 0 ms 468 KB Output is correct
13 Correct 1 ms 2396 KB Output is correct
14 Correct 1 ms 2524 KB Output is correct
15 Correct 1 ms 348 KB Output is correct
16 Correct 1 ms 348 KB Output is correct
17 Correct 0 ms 2516 KB Output is correct
18 Correct 1 ms 2396 KB Output is correct
19 Correct 1 ms 348 KB Output is correct
20 Correct 1 ms 2396 KB Output is correct
21 Correct 1 ms 860 KB Output is correct
22 Correct 1 ms 4700 KB Output is correct
23 Correct 2 ms 4700 KB Output is correct
24 Correct 1 ms 2908 KB Output is correct
25 Correct 1 ms 2652 KB Output is correct
26 Correct 1 ms 2908 KB Output is correct
27 Correct 1 ms 2856 KB Output is correct
28 Correct 1 ms 4700 KB Output is correct
29 Correct 1 ms 4700 KB Output is correct
30 Correct 1 ms 4700 KB Output is correct

Subtask #7
29.0 / 29.0

# 결과 실행 시간 메모리 Grader output
1 Correct 62 ms 104404 KB Output is correct
2 Correct 63 ms 102736 KB Output is correct
3 Correct 67 ms 102772 KB Output is correct
4 Correct 73 ms 102872 KB Output is correct
5 Correct 61 ms 102736 KB Output is correct
6 Correct 63 ms 102740 KB Output is correct
7 Correct 64 ms 102824 KB Output is correct
8 Correct 63 ms 102732 KB Output is correct
9 Correct 64 ms 104528 KB Output is correct
10 Correct 92 ms 104464 KB Output is correct
11 Correct 58 ms 101204 KB Output is correct
12 Correct 59 ms 102792 KB Output is correct
13 Correct 61 ms 102740 KB Output is correct
14 Correct 52 ms 101204 KB Output is correct
15 Correct 67 ms 102740 KB Output is correct
16 Correct 51 ms 102736 KB Output is correct
17 Correct 92 ms 101040 KB Output is correct
18 Correct 68 ms 102808 KB Output is correct
19 Correct 66 ms 102696 KB Output is correct
20 Correct 78 ms 102844 KB Output is correct
21 Correct 73 ms 103068 KB Output is correct
22 Correct 70 ms 104788 KB Output is correct
23 Correct 104 ms 104792 KB Output is correct
24 Correct 71 ms 104656 KB Output is correct
25 Correct 71 ms 104660 KB Output is correct
26 Correct 75 ms 104788 KB Output is correct
27 Correct 69 ms 102944 KB Output is correct
28 Correct 64 ms 103248 KB Output is correct
29 Correct 69 ms 104804 KB Output is correct
30 Correct 70 ms 102996 KB Output is correct
31 Correct 1 ms 348 KB Output is correct
32 Correct 1 ms 348 KB Output is correct
33 Correct 1 ms 2396 KB Output is correct
34 Correct 1 ms 2392 KB Output is correct
35 Correct 1 ms 348 KB Output is correct
36 Correct 1 ms 2396 KB Output is correct
37 Correct 1 ms 2516 KB Output is correct
38 Correct 1 ms 2392 KB Output is correct
39 Correct 1 ms 2476 KB Output is correct
40 Correct 1 ms 472 KB Output is correct
41 Correct 1 ms 2396 KB Output is correct
42 Correct 0 ms 468 KB Output is correct
43 Correct 1 ms 2396 KB Output is correct
44 Correct 1 ms 2524 KB Output is correct
45 Correct 1 ms 348 KB Output is correct
46 Correct 1 ms 348 KB Output is correct
47 Correct 0 ms 2516 KB Output is correct
48 Correct 1 ms 2396 KB Output is correct
49 Correct 1 ms 348 KB Output is correct
50 Correct 1 ms 2396 KB Output is correct
51 Correct 1 ms 860 KB Output is correct
52 Correct 1 ms 4700 KB Output is correct
53 Correct 2 ms 4700 KB Output is correct
54 Correct 1 ms 2908 KB Output is correct
55 Correct 1 ms 2652 KB Output is correct
56 Correct 1 ms 2908 KB Output is correct
57 Correct 1 ms 2856 KB Output is correct
58 Correct 1 ms 4700 KB Output is correct
59 Correct 1 ms 4700 KB Output is correct
60 Correct 1 ms 4700 KB Output is correct
61 Correct 147 ms 104796 KB Output is correct
62 Correct 160 ms 104756 KB Output is correct
63 Correct 76 ms 104788 KB Output is correct
64 Correct 148 ms 104752 KB Output is correct
65 Correct 115 ms 104724 KB Output is correct
66 Correct 106 ms 104796 KB Output is correct
67 Correct 104 ms 103004 KB Output is correct
68 Correct 68 ms 102996 KB Output is correct
69 Correct 69 ms 102820 KB Output is correct
70 Correct 67 ms 104536 KB Output is correct