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답안 #645770

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
645770 2022-09-28T00:38:50 Z kith14 Mountains (NOI20_mountains) C++17
100 / 100
 318 ms 27176 KB 
#include <bits/stdc++.h>
using namespace std;

#define ll long long
#define db double
#define pairll pair<ll,ll>
#define lpairll pair<ll,pairll>

#define repp(i,a,b) for (ll i = a; i <= b; i++)
#define repz(i,a,b) for (ll i = a; i < b; i++)
#define repm(i,a,b) for (ll i = a; i >= b; i--)
#define fr first
#define sc second
#define mp make_pair
#define pb push_back

const ll N = 3e5+5, MOD = 1e9+7;
ll tc = 1, n, m, ar[N], lr[N], rr[N], tree[N*4];
string s, s1, s2, ye = "YA", no = "TIDAK";
vector<pairll> v;

void input(){
  cin >> n;
  repp(i,1,n){
    cin >> ar[i];
    v.pb(mp(ar[i],i));
  }
  sort(v.begin(),v.end());
  ll pre = -1, cnt = 0;
  for (auto i : v){
    if (i.fr != pre){
      pre = i.fr;
      cnt++;
    }
    ar[i.sc] = cnt;
  }
}

void upd(ll l, ll r, ll idx, ll pos, ll val){
  if (l == r){
    tree[idx] += val;
    return;
  }
  ll md = (l+r)/2;
  if (pos <= md) upd(l,md,idx*2,pos,val);
  else upd(md+1,r,idx*2+1,pos,val);
  tree[idx] = tree[idx*2]+tree[idx*2+1];
}

ll que(ll l, ll r, ll idx, ll x, ll y){
  if (x > y || l > r || l > y || r < x) return 0;
  if (x <= l && r <= y) return tree[idx];
  ll md = (l+r)/2;
  return que(l,md,idx*2,x,y)+que(md+1,r,idx*2+1,x,y);
}

void solve(){
  memset(tree,0,sizeof(tree));
  repp(i,1,n){
    lr[i] = que(1,n,1,1,ar[i]-1);
    upd(1,n,1,ar[i],1);
  }

  memset(tree,0,sizeof(tree));
  repm(i,n,1){
    rr[i] = que(1,n,1,1,ar[i]-1);
    upd(1,n,1,ar[i],1);
  }

  ll ans = 0;
  repp(i,1,n){
    ans += lr[i]*rr[i];
    //cout << i << " " << lr[i] << " " << rr[i] << endl;
  }
  cout << ans << endl;
}

int main(){
  ios_base::sync_with_stdio(0);
  cin.tie(NULL);
  cout.tie(NULL);
  //cin >> tc;
  while(tc--){
    input();
    solve();
  }
}

Subtask #1
2.0 / 2.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 9684 KB Output is correct
2 Correct 183 ms 21728 KB Output is correct
3 Correct 180 ms 21488 KB Output is correct
4 Correct 177 ms 21584 KB Output is correct
5 Correct 181 ms 21496 KB Output is correct
6 Correct 184 ms 21544 KB Output is correct
7 Correct 177 ms 21624 KB Output is correct
8 Correct 179 ms 21496 KB Output is correct
9 Correct 181 ms 21484 KB Output is correct
10 Correct 174 ms 21472 KB Output is correct

Subtask #2
4.0 / 4.0

# 결과 실행 시간 메모리 Grader output
1 Correct 129 ms 21468 KB Output is correct
2 Correct 135 ms 22056 KB Output is correct
3 Correct 139 ms 22208 KB Output is correct
4 Correct 132 ms 22136 KB Output is correct
5 Correct 156 ms 22164 KB Output is correct
6 Correct 132 ms 22164 KB Output is correct
7 Correct 137 ms 22188 KB Output is correct
8 Correct 115 ms 22200 KB Output is correct
9 Correct 115 ms 22096 KB Output is correct
10 Correct 5 ms 9684 KB Output is correct

Subtask #3
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 129 ms 21468 KB Output is correct
2 Correct 135 ms 22056 KB Output is correct
3 Correct 139 ms 22208 KB Output is correct
4 Correct 132 ms 22136 KB Output is correct
5 Correct 156 ms 22164 KB Output is correct
6 Correct 132 ms 22164 KB Output is correct
7 Correct 137 ms 22188 KB Output is correct
8 Correct 115 ms 22200 KB Output is correct
9 Correct 115 ms 22096 KB Output is correct
10 Correct 5 ms 9684 KB Output is correct
11 Correct 181 ms 22312 KB Output is correct
12 Correct 186 ms 22440 KB Output is correct
13 Correct 180 ms 22424 KB Output is correct
14 Correct 182 ms 22444 KB Output is correct
15 Correct 188 ms 22460 KB Output is correct
16 Correct 183 ms 22332 KB Output is correct
17 Correct 180 ms 22328 KB Output is correct
18 Correct 123 ms 22384 KB Output is correct
19 Correct 136 ms 22644 KB Output is correct
20 Correct 6 ms 9672 KB Output is correct

Subtask #4
36.0 / 36.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 9696 KB Output is correct
2 Correct 5 ms 9704 KB Output is correct
3 Correct 6 ms 9684 KB Output is correct
4 Correct 4 ms 9684 KB Output is correct
5 Correct 6 ms 9684 KB Output is correct
6 Correct 5 ms 9684 KB Output is correct
7 Correct 5 ms 9684 KB Output is correct
8 Correct 5 ms 9764 KB Output is correct
9 Correct 5 ms 9684 KB Output is correct
10 Correct 5 ms 9672 KB Output is correct

Subtask #5
28.0 / 28.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 9696 KB Output is correct
2 Correct 5 ms 9704 KB Output is correct
3 Correct 6 ms 9684 KB Output is correct
4 Correct 4 ms 9684 KB Output is correct
5 Correct 6 ms 9684 KB Output is correct
6 Correct 5 ms 9684 KB Output is correct
7 Correct 5 ms 9684 KB Output is correct
8 Correct 5 ms 9764 KB Output is correct
9 Correct 5 ms 9684 KB Output is correct
10 Correct 5 ms 9672 KB Output is correct
11 Correct 14 ms 10456 KB Output is correct
12 Correct 12 ms 10368 KB Output is correct
13 Correct 17 ms 10444 KB Output is correct
14 Correct 13 ms 10380 KB Output is correct
15 Correct 14 ms 10444 KB Output is correct
16 Correct 12 ms 10456 KB Output is correct
17 Correct 12 ms 10384 KB Output is correct
18 Correct 14 ms 10456 KB Output is correct
19 Correct 10 ms 10200 KB Output is correct
20 Correct 5 ms 9684 KB Output is correct

Subtask #6
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 129 ms 21468 KB Output is correct
2 Correct 135 ms 22056 KB Output is correct
3 Correct 139 ms 22208 KB Output is correct
4 Correct 132 ms 22136 KB Output is correct
5 Correct 156 ms 22164 KB Output is correct
6 Correct 132 ms 22164 KB Output is correct
7 Correct 137 ms 22188 KB Output is correct
8 Correct 115 ms 22200 KB Output is correct
9 Correct 115 ms 22096 KB Output is correct
10 Correct 5 ms 9684 KB Output is correct
11 Correct 181 ms 22312 KB Output is correct
12 Correct 186 ms 22440 KB Output is correct
13 Correct 180 ms 22424 KB Output is correct
14 Correct 182 ms 22444 KB Output is correct
15 Correct 188 ms 22460 KB Output is correct
16 Correct 183 ms 22332 KB Output is correct
17 Correct 180 ms 22328 KB Output is correct
18 Correct 123 ms 22384 KB Output is correct
19 Correct 136 ms 22644 KB Output is correct
20 Correct 6 ms 9672 KB Output is correct
21 Correct 240 ms 23316 KB Output is correct
22 Correct 247 ms 23312 KB Output is correct
23 Correct 260 ms 23364 KB Output is correct
24 Correct 242 ms 23212 KB Output is correct
25 Correct 248 ms 23272 KB Output is correct
26 Correct 245 ms 23256 KB Output is correct
27 Correct 261 ms 23244 KB Output is correct
28 Correct 150 ms 23340 KB Output is correct
29 Correct 142 ms 23312 KB Output is correct
30 Correct 5 ms 9684 KB Output is correct

Subtask #7
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 9684 KB Output is correct
2 Correct 183 ms 21728 KB Output is correct
3 Correct 180 ms 21488 KB Output is correct
4 Correct 177 ms 21584 KB Output is correct
5 Correct 181 ms 21496 KB Output is correct
6 Correct 184 ms 21544 KB Output is correct
7 Correct 177 ms 21624 KB Output is correct
8 Correct 179 ms 21496 KB Output is correct
9 Correct 181 ms 21484 KB Output is correct
10 Correct 174 ms 21472 KB Output is correct
11 Correct 129 ms 21468 KB Output is correct
12 Correct 135 ms 22056 KB Output is correct
13 Correct 139 ms 22208 KB Output is correct
14 Correct 132 ms 22136 KB Output is correct
15 Correct 156 ms 22164 KB Output is correct
16 Correct 132 ms 22164 KB Output is correct
17 Correct 137 ms 22188 KB Output is correct
18 Correct 115 ms 22200 KB Output is correct
19 Correct 115 ms 22096 KB Output is correct
20 Correct 5 ms 9684 KB Output is correct
21 Correct 181 ms 22312 KB Output is correct
22 Correct 186 ms 22440 KB Output is correct
23 Correct 180 ms 22424 KB Output is correct
24 Correct 182 ms 22444 KB Output is correct
25 Correct 188 ms 22460 KB Output is correct
26 Correct 183 ms 22332 KB Output is correct
27 Correct 180 ms 22328 KB Output is correct
28 Correct 123 ms 22384 KB Output is correct
29 Correct 136 ms 22644 KB Output is correct
30 Correct 6 ms 9672 KB Output is correct
31 Correct 6 ms 9696 KB Output is correct
32 Correct 5 ms 9704 KB Output is correct
33 Correct 6 ms 9684 KB Output is correct
34 Correct 4 ms 9684 KB Output is correct
35 Correct 6 ms 9684 KB Output is correct
36 Correct 5 ms 9684 KB Output is correct
37 Correct 5 ms 9684 KB Output is correct
38 Correct 5 ms 9764 KB Output is correct
39 Correct 5 ms 9684 KB Output is correct
40 Correct 5 ms 9672 KB Output is correct
41 Correct 14 ms 10456 KB Output is correct
42 Correct 12 ms 10368 KB Output is correct
43 Correct 17 ms 10444 KB Output is correct
44 Correct 13 ms 10380 KB Output is correct
45 Correct 14 ms 10444 KB Output is correct
46 Correct 12 ms 10456 KB Output is correct
47 Correct 12 ms 10384 KB Output is correct
48 Correct 14 ms 10456 KB Output is correct
49 Correct 10 ms 10200 KB Output is correct
50 Correct 5 ms 9684 KB Output is correct
51 Correct 240 ms 23316 KB Output is correct
52 Correct 247 ms 23312 KB Output is correct
53 Correct 260 ms 23364 KB Output is correct
54 Correct 242 ms 23212 KB Output is correct
55 Correct 248 ms 23272 KB Output is correct
56 Correct 245 ms 23256 KB Output is correct
57 Correct 261 ms 23244 KB Output is correct
58 Correct 150 ms 23340 KB Output is correct
59 Correct 142 ms 23312 KB Output is correct
60 Correct 5 ms 9684 KB Output is correct
61 Correct 299 ms 27008 KB Output is correct
62 Correct 295 ms 27176 KB Output is correct
63 Correct 286 ms 26992 KB Output is correct
64 Correct 296 ms 27108 KB Output is correct
65 Correct 301 ms 27016 KB Output is correct
66 Correct 318 ms 27100 KB Output is correct
67 Correct 298 ms 27048 KB Output is correct
68 Correct 281 ms 27152 KB Output is correct
69 Correct 256 ms 23424 KB Output is correct
70 Correct 5 ms 9740 KB Output is correct