oj.uz

답안 #1092391

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
1092391 2024-09-24T01:25:40 Z huyy123 Mountains (NOI20_mountains) C++14
100 / 100
 311 ms 22852 KB 
#include<bits/stdc++.h>
using namespace std;
#define rep(i,a,b) for (int i=a;i<=b;i++)
#define rep2(i,a,b,c) for (int i=a;i<=b;i+=c)
#define rev(i,a,b) for (int i=a;i>=b;i--)
#define rev2(i,a,b,c) for (int i=a;i>=b;i-=c)
#define ii pair<int,int>
#define bit(i,j) ((i>>j)&1)
#define ull unsigned long long
#define pb push_back
#define ll long long
#define int long long
#define F first
#define S second
const int N=3e5+5;
const int mod=1e9+7;
const int MAX=1e9;
int n,res,a[N],dp[N],s[N*4],dem[N];
vector<int> uni;
void update(int id,int l,int r,int i,int val)
{
    if(i>r||i<l)
        return;
    if(l==r)
    {
        s[id]+=val;
        return;
    }
    int mid=(l+r)/2;
    update(id*2,l,mid,i,val);
    update(id*2+1,mid+1,r,i,val);
    s[id]=s[id*2]+s[id*2+1];
}
int get(int id,int l,int r,int u,int v)
{
    if(v<l||r<u)
        return 0;
    if(l>=u&&r<=v)
    {
        return s[id];
    }
    int mid=(l+r)/2;
    return get(id*2,l,mid,u,v)+get(id*2+1,mid+1,r,u,v);
}
void solution()
{
    cin>>n;
    rep(i,1,n)
    {
        cin>>a[i];
        uni.push_back(a[i]);
    }
    sort(uni.begin(),uni.end());
    uni.resize(unique(uni.begin(),uni.end())-uni.begin());
    rep(i,1,n) a[i]=lower_bound(uni.begin(),uni.end(),a[i])-uni.begin()+1;
    rep(i,1,n)
    {
        dp[i]=get(1,1,n,0,a[i]-1);
        update(1,1,n,a[i],1);
    }
    memset(s,0,sizeof(s));
    rev(i,n,1){
        res+=dp[i]*get(1,1,n,0,a[i]-1);
        update(1,1,n,a[i],1);
    }
    cout<<res;
}
int32_t main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    if(fopen("Mountains.inp","r")){freopen("Mountains.inp","r",stdin);freopen("Mountains.out","w",stdout);}
    int test=1;
//    cin>>test;
    while(test--)
        solution();
}
/*

*/

Compilation message

Mountains.cpp: In function 'int32_t main()':
Mountains.cpp:72:43: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   72 |     if(fopen("Mountains.inp","r")){freopen("Mountains.inp","r",stdin);freopen("Mountains.out","w",stdout);}
      |                                    ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~
Mountains.cpp:72:78: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   72 |     if(fopen("Mountains.inp","r")){freopen("Mountains.inp","r",stdin);freopen("Mountains.out","w",stdout);}
      |                                                                       ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
2.0 / 2.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 9820 KB Output is correct
2 Correct 175 ms 21568 KB Output is correct
3 Correct 184 ms 21440 KB Output is correct
4 Correct 176 ms 21628 KB Output is correct
5 Correct 174 ms 21620 KB Output is correct
6 Correct 208 ms 21588 KB Output is correct
7 Correct 172 ms 21440 KB Output is correct
8 Correct 173 ms 21436 KB Output is correct
9 Correct 164 ms 21600 KB Output is correct
10 Correct 167 ms 21588 KB Output is correct

Subtask #2
4.0 / 4.0

# 결과 실행 시간 메모리 Grader output
1 Correct 122 ms 17584 KB Output is correct
2 Correct 139 ms 17596 KB Output is correct
3 Correct 111 ms 17540 KB Output is correct
4 Correct 113 ms 17596 KB Output is correct
5 Correct 115 ms 17600 KB Output is correct
6 Correct 114 ms 17496 KB Output is correct
7 Correct 128 ms 17368 KB Output is correct
8 Correct 105 ms 17600 KB Output is correct
9 Correct 114 ms 17600 KB Output is correct
10 Correct 4 ms 9820 KB Output is correct

Subtask #3
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 122 ms 17584 KB Output is correct
2 Correct 139 ms 17596 KB Output is correct
3 Correct 111 ms 17540 KB Output is correct
4 Correct 113 ms 17596 KB Output is correct
5 Correct 115 ms 17600 KB Output is correct
6 Correct 114 ms 17496 KB Output is correct
7 Correct 128 ms 17368 KB Output is correct
8 Correct 105 ms 17600 KB Output is correct
9 Correct 114 ms 17600 KB Output is correct
10 Correct 4 ms 9820 KB Output is correct
11 Correct 157 ms 17764 KB Output is correct
12 Correct 153 ms 17860 KB Output is correct
13 Correct 151 ms 17856 KB Output is correct
14 Correct 151 ms 17620 KB Output is correct
15 Correct 163 ms 17740 KB Output is correct
16 Correct 156 ms 17856 KB Output is correct
17 Correct 160 ms 17652 KB Output is correct
18 Correct 125 ms 17852 KB Output is correct
19 Correct 127 ms 17752 KB Output is correct
20 Correct 4 ms 9820 KB Output is correct

Subtask #4
36.0 / 36.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 9816 KB Output is correct
2 Correct 5 ms 9820 KB Output is correct
3 Correct 7 ms 9820 KB Output is correct
4 Correct 5 ms 9816 KB Output is correct
5 Correct 4 ms 9820 KB Output is correct
6 Correct 6 ms 9820 KB Output is correct
7 Correct 4 ms 9820 KB Output is correct
8 Correct 5 ms 9804 KB Output is correct
9 Correct 4 ms 9820 KB Output is correct
10 Correct 4 ms 9820 KB Output is correct

Subtask #5
28.0 / 28.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 9816 KB Output is correct
2 Correct 5 ms 9820 KB Output is correct
3 Correct 7 ms 9820 KB Output is correct
4 Correct 5 ms 9816 KB Output is correct
5 Correct 4 ms 9820 KB Output is correct
6 Correct 6 ms 9820 KB Output is correct
7 Correct 4 ms 9820 KB Output is correct
8 Correct 5 ms 9804 KB Output is correct
9 Correct 4 ms 9820 KB Output is correct
10 Correct 4 ms 9820 KB Output is correct
11 Correct 12 ms 10332 KB Output is correct
12 Correct 11 ms 10420 KB Output is correct
13 Correct 11 ms 10332 KB Output is correct
14 Correct 11 ms 10288 KB Output is correct
15 Correct 12 ms 10580 KB Output is correct
16 Correct 12 ms 10332 KB Output is correct
17 Correct 11 ms 10352 KB Output is correct
18 Correct 10 ms 10332 KB Output is correct
19 Correct 9 ms 10200 KB Output is correct
20 Correct 4 ms 9820 KB Output is correct

Subtask #6
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 122 ms 17584 KB Output is correct
2 Correct 139 ms 17596 KB Output is correct
3 Correct 111 ms 17540 KB Output is correct
4 Correct 113 ms 17596 KB Output is correct
5 Correct 115 ms 17600 KB Output is correct
6 Correct 114 ms 17496 KB Output is correct
7 Correct 128 ms 17368 KB Output is correct
8 Correct 105 ms 17600 KB Output is correct
9 Correct 114 ms 17600 KB Output is correct
10 Correct 4 ms 9820 KB Output is correct
11 Correct 157 ms 17764 KB Output is correct
12 Correct 153 ms 17860 KB Output is correct
13 Correct 151 ms 17856 KB Output is correct
14 Correct 151 ms 17620 KB Output is correct
15 Correct 163 ms 17740 KB Output is correct
16 Correct 156 ms 17856 KB Output is correct
17 Correct 160 ms 17652 KB Output is correct
18 Correct 125 ms 17852 KB Output is correct
19 Correct 127 ms 17752 KB Output is correct
20 Correct 4 ms 9820 KB Output is correct
21 Correct 261 ms 18696 KB Output is correct
22 Correct 262 ms 18624 KB Output is correct
23 Correct 248 ms 18528 KB Output is correct
24 Correct 250 ms 18620 KB Output is correct
25 Correct 249 ms 18624 KB Output is correct
26 Correct 251 ms 18528 KB Output is correct
27 Correct 249 ms 18624 KB Output is correct
28 Correct 139 ms 18624 KB Output is correct
29 Correct 136 ms 18620 KB Output is correct
30 Correct 4 ms 9820 KB Output is correct

Subtask #7
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 9820 KB Output is correct
2 Correct 175 ms 21568 KB Output is correct
3 Correct 184 ms 21440 KB Output is correct
4 Correct 176 ms 21628 KB Output is correct
5 Correct 174 ms 21620 KB Output is correct
6 Correct 208 ms 21588 KB Output is correct
7 Correct 172 ms 21440 KB Output is correct
8 Correct 173 ms 21436 KB Output is correct
9 Correct 164 ms 21600 KB Output is correct
10 Correct 167 ms 21588 KB Output is correct
11 Correct 122 ms 17584 KB Output is correct
12 Correct 139 ms 17596 KB Output is correct
13 Correct 111 ms 17540 KB Output is correct
14 Correct 113 ms 17596 KB Output is correct
15 Correct 115 ms 17600 KB Output is correct
16 Correct 114 ms 17496 KB Output is correct
17 Correct 128 ms 17368 KB Output is correct
18 Correct 105 ms 17600 KB Output is correct
19 Correct 114 ms 17600 KB Output is correct
20 Correct 4 ms 9820 KB Output is correct
21 Correct 157 ms 17764 KB Output is correct
22 Correct 153 ms 17860 KB Output is correct
23 Correct 151 ms 17856 KB Output is correct
24 Correct 151 ms 17620 KB Output is correct
25 Correct 163 ms 17740 KB Output is correct
26 Correct 156 ms 17856 KB Output is correct
27 Correct 160 ms 17652 KB Output is correct
28 Correct 125 ms 17852 KB Output is correct
29 Correct 127 ms 17752 KB Output is correct
30 Correct 4 ms 9820 KB Output is correct
31 Correct 5 ms 9816 KB Output is correct
32 Correct 5 ms 9820 KB Output is correct
33 Correct 7 ms 9820 KB Output is correct
34 Correct 5 ms 9816 KB Output is correct
35 Correct 4 ms 9820 KB Output is correct
36 Correct 6 ms 9820 KB Output is correct
37 Correct 4 ms 9820 KB Output is correct
38 Correct 5 ms 9804 KB Output is correct
39 Correct 4 ms 9820 KB Output is correct
40 Correct 4 ms 9820 KB Output is correct
41 Correct 12 ms 10332 KB Output is correct
42 Correct 11 ms 10420 KB Output is correct
43 Correct 11 ms 10332 KB Output is correct
44 Correct 11 ms 10288 KB Output is correct
45 Correct 12 ms 10580 KB Output is correct
46 Correct 12 ms 10332 KB Output is correct
47 Correct 11 ms 10352 KB Output is correct
48 Correct 10 ms 10332 KB Output is correct
49 Correct 9 ms 10200 KB Output is correct
50 Correct 4 ms 9820 KB Output is correct
51 Correct 261 ms 18696 KB Output is correct
52 Correct 262 ms 18624 KB Output is correct
53 Correct 248 ms 18528 KB Output is correct
54 Correct 250 ms 18620 KB Output is correct
55 Correct 249 ms 18624 KB Output is correct
56 Correct 251 ms 18528 KB Output is correct
57 Correct 249 ms 18624 KB Output is correct
58 Correct 139 ms 18624 KB Output is correct
59 Correct 136 ms 18620 KB Output is correct
60 Correct 4 ms 9820 KB Output is correct
61 Correct 301 ms 22488 KB Output is correct
62 Correct 292 ms 22464 KB Output is correct
63 Correct 304 ms 22852 KB Output is correct
64 Correct 288 ms 22476 KB Output is correct
65 Correct 300 ms 22464 KB Output is correct
66 Correct 311 ms 22460 KB Output is correct
67 Correct 300 ms 22464 KB Output is correct
68 Correct 279 ms 22464 KB Output is correct
69 Correct 259 ms 18716 KB Output is correct
70 Correct 4 ms 9816 KB Output is correct