oj.uz

Submission #394872

# Submission time Handle Problem Language Result Execution time Memory
394872 2021-04-27T11:48:04 Z Qw3rTy Rabbit Carrot (LMIO19_triusis) C++11
63 / 100
 196 ms 44868 KB 
#include <iostream>
#define int long long
#define INF 1e16
using namespace std;

const int maxN = 2e5+5;

int f[maxN];
int a[maxN];
int N,M;

struct node{
    int val,lc,rc;
    node(){};
}tree[maxN<<2];
int cnt;

void init(){
    cnt = 1;
    tree[cnt].lc = tree[cnt].rc = 0;
    tree[cnt].val = -INF;
    return;
}

int build(){
    tree[++cnt].val = -INF;
    tree[cnt].lc = 0;
    tree[cnt].rc = 0;
    return cnt;
}

void pushup(int p){
    tree[p].val = max(tree[tree[p].lc].val,tree[tree[p].rc].val);
    return;
}

void update(int p, int l, int r, int a, int b, int val){
    if(a > r || b < l)return;
    if(a <= l && r <= b){
        tree[p].val = max(tree[p].val,val);
        return;
    }
    int mid = (l+r)>>1;
    if(tree[p].lc == 0)tree[p].lc = build();
    if(tree[p].rc == 0)tree[p].rc = build();
    update(tree[p].lc,l,mid,a,b,val);
    update(tree[p].rc,mid+1,r,a,b,val);
    pushup(p);
    return;
}

int query(int p, int l, int r, int a, int b){
    if(a > r || b < l)return -INF;
    if(a <= l && r <= b)return tree[p].val;
    int mid = (l+r)>>1;
    return max(query(tree[p].lc,l,mid,a,b),query(tree[p].rc,mid+1,r,a,b));
}

void testIO(){
    freopen("../test.in","r",stdin);
    return;
}

signed main(){
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    //testIO();
    cin >> N >> M;
    for(int i = 1; i <= N; ++i)cin >> a[i];
    a[0] = 0;
    f[0] = 0;
    //O(NlogN)
    init();
    for(int i = 1; i <= N; ++i){
        if(a[i] > M*i)continue;
        f[i] = max(f[i],query(1,-INF,INF,a[i]-M*i,INF)+1);
        update(1,-INF,INF,a[i]-M*i,a[i]-M*i,f[i]);
    }
    //O(N^2)
//    for(int i = 1; i <= N; ++i){
//        if(a[i] > M*i)continue;
//        for(int j = 0; j < i; ++j){
//            if(a[i] - M*i <= a[j] - M*j)f[i] = max(f[i],f[j]+1);
//        }
//    }
    int res = 0;
    for(int i = 1; i <= N; ++i)res = max(res,f[i]);
    cout << N - res << '\n';
    return 0;
}

Compilation message

triusis.cpp: In function 'void testIO()':
triusis.cpp:60:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   60 |     freopen("../test.in","r",stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 332 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 332 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Correct 1 ms 332 KB Output is correct
6 Correct 1 ms 260 KB Output is correct
7 Correct 1 ms 204 KB Output is correct
8 Correct 1 ms 332 KB Output is correct
9 Correct 1 ms 332 KB Output is correct
10 Correct 1 ms 332 KB Output is correct
11 Correct 1 ms 332 KB Output is correct
12 Correct 1 ms 332 KB Output is correct
13 Correct 1 ms 332 KB Output is correct
14 Correct 1 ms 332 KB Output is correct
15 Correct 1 ms 332 KB Output is correct
16 Correct 1 ms 204 KB Output is correct

Subtask #2
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 332 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 332 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Correct 1 ms 332 KB Output is correct
6 Correct 1 ms 260 KB Output is correct
7 Correct 1 ms 204 KB Output is correct
8 Correct 1 ms 332 KB Output is correct
9 Correct 1 ms 332 KB Output is correct
10 Correct 1 ms 332 KB Output is correct
11 Correct 1 ms 332 KB Output is correct
12 Correct 1 ms 332 KB Output is correct
13 Correct 1 ms 332 KB Output is correct
14 Correct 1 ms 332 KB Output is correct
15 Correct 1 ms 332 KB Output is correct
16 Correct 1 ms 204 KB Output is correct
17 Correct 1 ms 332 KB Output is correct
18 Correct 1 ms 332 KB Output is correct
19 Correct 1 ms 332 KB Output is correct
20 Correct 7 ms 668 KB Output is correct
21 Correct 11 ms 1332 KB Output is correct
22 Correct 1 ms 332 KB Output is correct
23 Correct 13 ms 3148 KB Output is correct
24 Correct 12 ms 3460 KB Output is correct
25 Correct 11 ms 1484 KB Output is correct
26 Correct 10 ms 2560 KB Output is correct
27 Correct 5 ms 360 KB Output is correct
28 Correct 7 ms 332 KB Output is correct
29 Correct 9 ms 1432 KB Output is correct
30 Correct 9 ms 1484 KB Output is correct
31 Correct 7 ms 460 KB Output is correct
32 Correct 10 ms 2844 KB Output is correct
33 Correct 10 ms 2764 KB Output is correct

Subtask #3
28.0 / 28.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 332 KB Output is correct
2 Correct 1 ms 332 KB Output is correct
3 Correct 1 ms 332 KB Output is correct
4 Correct 7 ms 668 KB Output is correct
5 Correct 11 ms 1332 KB Output is correct
6 Correct 1 ms 332 KB Output is correct
7 Correct 13 ms 3148 KB Output is correct
8 Correct 12 ms 3460 KB Output is correct
9 Correct 11 ms 1484 KB Output is correct
10 Correct 10 ms 2560 KB Output is correct
11 Correct 5 ms 360 KB Output is correct
12 Correct 7 ms 332 KB Output is correct
13 Correct 9 ms 1432 KB Output is correct
14 Correct 9 ms 1484 KB Output is correct
15 Correct 7 ms 460 KB Output is correct
16 Correct 10 ms 2844 KB Output is correct
17 Correct 10 ms 2764 KB Output is correct
18 Correct 1 ms 332 KB Output is correct
19 Correct 1 ms 204 KB Output is correct
20 Correct 1 ms 332 KB Output is correct
21 Correct 1 ms 332 KB Output is correct
22 Correct 1 ms 332 KB Output is correct
23 Correct 1 ms 260 KB Output is correct
24 Correct 1 ms 204 KB Output is correct
25 Correct 1 ms 332 KB Output is correct
26 Correct 1 ms 332 KB Output is correct
27 Correct 1 ms 332 KB Output is correct
28 Correct 1 ms 332 KB Output is correct
29 Correct 1 ms 332 KB Output is correct
30 Correct 1 ms 332 KB Output is correct
31 Correct 1 ms 332 KB Output is correct
32 Correct 1 ms 332 KB Output is correct
33 Correct 1 ms 204 KB Output is correct
34 Correct 1 ms 332 KB Output is correct
35 Correct 1 ms 460 KB Output is correct
36 Correct 1 ms 460 KB Output is correct
37 Correct 10 ms 2508 KB Output is correct
38 Correct 5 ms 332 KB Output is correct
39 Correct 6 ms 332 KB Output is correct
40 Correct 7 ms 524 KB Output is correct
41 Correct 1 ms 332 KB Output is correct
42 Correct 12 ms 3180 KB Output is correct
43 Correct 10 ms 3180 KB Output is correct

Subtask #4
0 / 37.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 332 KB Output is correct
2 Correct 1 ms 460 KB Output is correct
3 Correct 1 ms 460 KB Output is correct
4 Correct 10 ms 2508 KB Output is correct
5 Correct 5 ms 332 KB Output is correct
6 Correct 6 ms 332 KB Output is correct
7 Correct 7 ms 524 KB Output is correct
8 Correct 1 ms 332 KB Output is correct
9 Correct 12 ms 3180 KB Output is correct
10 Correct 10 ms 3180 KB Output is correct
11 Correct 1 ms 332 KB Output is correct
12 Correct 1 ms 332 KB Output is correct
13 Correct 1 ms 332 KB Output is correct
14 Correct 7 ms 668 KB Output is correct
15 Correct 11 ms 1332 KB Output is correct
16 Correct 1 ms 332 KB Output is correct
17 Correct 13 ms 3148 KB Output is correct
18 Correct 12 ms 3460 KB Output is correct
19 Correct 11 ms 1484 KB Output is correct
20 Correct 10 ms 2560 KB Output is correct
21 Correct 5 ms 360 KB Output is correct
22 Correct 7 ms 332 KB Output is correct
23 Correct 9 ms 1432 KB Output is correct
24 Correct 9 ms 1484 KB Output is correct
25 Correct 7 ms 460 KB Output is correct
26 Correct 10 ms 2844 KB Output is correct
27 Correct 10 ms 2764 KB Output is correct
28 Correct 1 ms 332 KB Output is correct
29 Correct 1 ms 204 KB Output is correct
30 Correct 1 ms 332 KB Output is correct
31 Correct 1 ms 332 KB Output is correct
32 Correct 1 ms 332 KB Output is correct
33 Correct 1 ms 260 KB Output is correct
34 Correct 1 ms 204 KB Output is correct
35 Correct 1 ms 332 KB Output is correct
36 Correct 1 ms 332 KB Output is correct
37 Correct 1 ms 332 KB Output is correct
38 Correct 1 ms 332 KB Output is correct
39 Correct 1 ms 332 KB Output is correct
40 Correct 1 ms 332 KB Output is correct
41 Correct 1 ms 332 KB Output is correct
42 Correct 1 ms 332 KB Output is correct
43 Correct 1 ms 204 KB Output is correct
44 Runtime error 196 ms 44868 KB Execution killed with signal 11
45 Halted 0 ms 0 KB -