oj.uz

Submission #1092156

# Submission time Handle Problem Language Result Execution time Memory
1092156 2024-09-23T11:01:38 Z khanhgng Mountains (NOI20_mountains) C++14
100 / 100
 134 ms 15556 KB 
#pragma GCC optimize ("O3")
#include<bits/stdc++.h>
#define fi first
#define se second
#define ll long long
#define ld long double
#define pii pair<int,int>
#define SZ(x) ((int)(x.size()))
#define bit(i,x) ((x>>i)&1)
#define pb push_back
#define FOR(i,a,b) for(int i=(a);i<=(b);++i)
#define FORD(i,a,b) for(int i=(a);i>=(b);--i)
#define task "mountains"
#define int long long

using namespace std;

mt19937 rd(chrono::steady_clock::now().time_since_epoch().count());
ll Rand(ll l,ll r){assert(l<=r);return uniform_int_distribution<ll>(l,r)(rd);}

const int MAXn=5e5+7;
const int MOD=1e9+7;
const ll oo = 1e18;
const ll BASE=3137LL;

int n,a[MAXn],dp[MAXn],res;

struct FenwickTree{
    int f[MAXn];
    int N;
    void init(int n){FOR(i,1,n)f[i]=0;N=n;}
    void upd(int idx,int val){
        for(idx;idx<=N;idx+=(idx&-idx)){
            f[idx]+=val;
        }
    }
    int get(int idx){
        int ans=0;
        for(idx;idx>=1;idx-=(idx&-idx)){
            ans+=f[idx];
        }
        return ans;
    }
}ft;

void solution(){
    cin>>n;
    vector<int>zip;
    FOR(i,1,n)cin>>a[i],zip.pb(a[i]);
    sort(zip.begin(),zip.end());
    zip.resize(unique(zip.begin(),zip.end())-zip.begin());
    FOR(i,1,n)a[i]=lower_bound(zip.begin(),zip.end(),a[i])-zip.begin()+1;
    ft.init(n);
    FOR(i,1,n){
        dp[i]=ft.get(a[i]-1);
        ft.upd(a[i],1);
    }
    ft.init(n);
    FORD(i,n,1){
        res+=dp[i]*ft.get(a[i]-1);
        ft.upd(a[i],1);
    }
    cout<<res;

}

int32_t main(){
    if(fopen(task".inp","r")){freopen(task".inp","r",stdin);freopen(task".out","w",stdout);}
    ios_base::sync_with_stdio(0);cin.tie(0);
    int ntest=1;//cin>>ntest;
    while(ntest--){solution();}
    cerr<<"\n"<<1.0*clock()/CLOCKS_PER_SEC<<"s ";
}

Compilation message

Mountains.cpp: In member function 'void FenwickTree::upd(long long int, long long int)':
Mountains.cpp:33:13: warning: statement has no effect [-Wunused-value]
   33 |         for(idx;idx<=N;idx+=(idx&-idx)){
      |             ^~~
Mountains.cpp: In member function 'long long int FenwickTree::get(long long int)':
Mountains.cpp:39:13: warning: statement has no effect [-Wunused-value]
   39 |         for(idx;idx>=1;idx-=(idx&-idx)){
      |             ^~~
Mountains.cpp: In function 'int32_t main()':
Mountains.cpp:68:38: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   68 |     if(fopen(task".inp","r")){freopen(task".inp","r",stdin);freopen(task".out","w",stdout);}
      |                               ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
Mountains.cpp:68:68: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   68 |     if(fopen(task".inp","r")){freopen(task".inp","r",stdin);freopen(task".out","w",stdout);}
      |                                                             ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
2.0 / 2.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 63 ms 15432 KB Output is correct
3 Correct 72 ms 15284 KB Output is correct
4 Correct 64 ms 15296 KB Output is correct
5 Correct 64 ms 15296 KB Output is correct
6 Correct 65 ms 15396 KB Output is correct
7 Correct 64 ms 15292 KB Output is correct
8 Correct 64 ms 15428 KB Output is correct
9 Correct 76 ms 15460 KB Output is correct
10 Correct 64 ms 15544 KB Output is correct

Subtask #2
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 48 ms 9920 KB Output is correct
2 Correct 48 ms 10436 KB Output is correct
3 Correct 52 ms 10436 KB Output is correct
4 Correct 57 ms 10516 KB Output is correct
5 Correct 50 ms 10432 KB Output is correct
6 Correct 56 ms 10436 KB Output is correct
7 Correct 52 ms 10440 KB Output is correct
8 Correct 45 ms 10428 KB Output is correct
9 Correct 52 ms 10696 KB Output is correct
10 Correct 0 ms 344 KB Output is correct

Subtask #3
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 48 ms 9920 KB Output is correct
2 Correct 48 ms 10436 KB Output is correct
3 Correct 52 ms 10436 KB Output is correct
4 Correct 57 ms 10516 KB Output is correct
5 Correct 50 ms 10432 KB Output is correct
6 Correct 56 ms 10436 KB Output is correct
7 Correct 52 ms 10440 KB Output is correct
8 Correct 45 ms 10428 KB Output is correct
9 Correct 52 ms 10696 KB Output is correct
10 Correct 0 ms 344 KB Output is correct
11 Correct 59 ms 10784 KB Output is correct
12 Correct 56 ms 10688 KB Output is correct
13 Correct 55 ms 10684 KB Output is correct
14 Correct 62 ms 10692 KB Output is correct
15 Correct 58 ms 10772 KB Output is correct
16 Correct 58 ms 10720 KB Output is correct
17 Correct 61 ms 10684 KB Output is correct
18 Correct 40 ms 10692 KB Output is correct
19 Correct 40 ms 10688 KB Output is correct
20 Correct 1 ms 348 KB Output is correct

Subtask #4
36.0 / 36.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 1 ms 344 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 1 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct

Subtask #5
28.0 / 28.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 1 ms 344 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 1 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 3 ms 1116 KB Output is correct
12 Correct 3 ms 1116 KB Output is correct
13 Correct 3 ms 956 KB Output is correct
14 Correct 4 ms 1036 KB Output is correct
15 Correct 4 ms 1116 KB Output is correct
16 Correct 5 ms 1248 KB Output is correct
17 Correct 3 ms 1036 KB Output is correct
18 Correct 3 ms 964 KB Output is correct
19 Correct 2 ms 736 KB Output is correct
20 Correct 1 ms 348 KB Output is correct

Subtask #6
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 48 ms 9920 KB Output is correct
2 Correct 48 ms 10436 KB Output is correct
3 Correct 52 ms 10436 KB Output is correct
4 Correct 57 ms 10516 KB Output is correct
5 Correct 50 ms 10432 KB Output is correct
6 Correct 56 ms 10436 KB Output is correct
7 Correct 52 ms 10440 KB Output is correct
8 Correct 45 ms 10428 KB Output is correct
9 Correct 52 ms 10696 KB Output is correct
10 Correct 0 ms 344 KB Output is correct
11 Correct 59 ms 10784 KB Output is correct
12 Correct 56 ms 10688 KB Output is correct
13 Correct 55 ms 10684 KB Output is correct
14 Correct 62 ms 10692 KB Output is correct
15 Correct 58 ms 10772 KB Output is correct
16 Correct 58 ms 10720 KB Output is correct
17 Correct 61 ms 10684 KB Output is correct
18 Correct 40 ms 10692 KB Output is correct
19 Correct 40 ms 10688 KB Output is correct
20 Correct 1 ms 348 KB Output is correct
21 Correct 106 ms 11636 KB Output is correct
22 Correct 104 ms 11628 KB Output is correct
23 Correct 106 ms 11708 KB Output is correct
24 Correct 103 ms 11640 KB Output is correct
25 Correct 102 ms 11708 KB Output is correct
26 Correct 103 ms 11712 KB Output is correct
27 Correct 102 ms 11648 KB Output is correct
28 Correct 48 ms 11564 KB Output is correct
29 Correct 47 ms 11716 KB Output is correct
30 Correct 1 ms 348 KB Output is correct

Subtask #7
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 63 ms 15432 KB Output is correct
3 Correct 72 ms 15284 KB Output is correct
4 Correct 64 ms 15296 KB Output is correct
5 Correct 64 ms 15296 KB Output is correct
6 Correct 65 ms 15396 KB Output is correct
7 Correct 64 ms 15292 KB Output is correct
8 Correct 64 ms 15428 KB Output is correct
9 Correct 76 ms 15460 KB Output is correct
10 Correct 64 ms 15544 KB Output is correct
11 Correct 48 ms 9920 KB Output is correct
12 Correct 48 ms 10436 KB Output is correct
13 Correct 52 ms 10436 KB Output is correct
14 Correct 57 ms 10516 KB Output is correct
15 Correct 50 ms 10432 KB Output is correct
16 Correct 56 ms 10436 KB Output is correct
17 Correct 52 ms 10440 KB Output is correct
18 Correct 45 ms 10428 KB Output is correct
19 Correct 52 ms 10696 KB Output is correct
20 Correct 0 ms 344 KB Output is correct
21 Correct 59 ms 10784 KB Output is correct
22 Correct 56 ms 10688 KB Output is correct
23 Correct 55 ms 10684 KB Output is correct
24 Correct 62 ms 10692 KB Output is correct
25 Correct 58 ms 10772 KB Output is correct
26 Correct 58 ms 10720 KB Output is correct
27 Correct 61 ms 10684 KB Output is correct
28 Correct 40 ms 10692 KB Output is correct
29 Correct 40 ms 10688 KB Output is correct
30 Correct 1 ms 348 KB Output is correct
31 Correct 0 ms 348 KB Output is correct
32 Correct 1 ms 348 KB Output is correct
33 Correct 1 ms 344 KB Output is correct
34 Correct 1 ms 348 KB Output is correct
35 Correct 1 ms 348 KB Output is correct
36 Correct 1 ms 348 KB Output is correct
37 Correct 0 ms 348 KB Output is correct
38 Correct 1 ms 348 KB Output is correct
39 Correct 1 ms 348 KB Output is correct
40 Correct 0 ms 348 KB Output is correct
41 Correct 3 ms 1116 KB Output is correct
42 Correct 3 ms 1116 KB Output is correct
43 Correct 3 ms 956 KB Output is correct
44 Correct 4 ms 1036 KB Output is correct
45 Correct 4 ms 1116 KB Output is correct
46 Correct 5 ms 1248 KB Output is correct
47 Correct 3 ms 1036 KB Output is correct
48 Correct 3 ms 964 KB Output is correct
49 Correct 2 ms 736 KB Output is correct
50 Correct 1 ms 348 KB Output is correct
51 Correct 106 ms 11636 KB Output is correct
52 Correct 104 ms 11628 KB Output is correct
53 Correct 106 ms 11708 KB Output is correct
54 Correct 103 ms 11640 KB Output is correct
55 Correct 102 ms 11708 KB Output is correct
56 Correct 103 ms 11712 KB Output is correct
57 Correct 102 ms 11648 KB Output is correct
58 Correct 48 ms 11564 KB Output is correct
59 Correct 47 ms 11716 KB Output is correct
60 Correct 1 ms 348 KB Output is correct
61 Correct 134 ms 15296 KB Output is correct
62 Correct 129 ms 15504 KB Output is correct
63 Correct 127 ms 15296 KB Output is correct
64 Correct 128 ms 15292 KB Output is correct
65 Correct 128 ms 15292 KB Output is correct
66 Correct 131 ms 15556 KB Output is correct
67 Correct 127 ms 15296 KB Output is correct
68 Correct 124 ms 15552 KB Output is correct
69 Correct 106 ms 11708 KB Output is correct
70 Correct 0 ms 344 KB Output is correct