oj.uz

Submission #570148

# Submission time Handle Problem Language Result Execution time Memory
570148 2022-05-28T19:29:03 Z HunterXD Mountains (NOI20_mountains) C++17
100 / 100
 469 ms 33244 KB 
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef pair<int,int> ii;
typedef vector <int> vi;
typedef vector <ll> vl;
typedef vector<string> vs;
typedef vector<bool> vb;
typedef vector <char> vc;
typedef vector<ii> vii;
typedef vector<vi> vvi;
typedef vector<vl> vvl;
typedef vector<vc> vvc;
typedef vector<vs> vvs;
typedef pair<ll,ll> pl;
typedef double dou;
typedef vector<pl> vpl;
typedef unsigned long long ull;
typedef uint64_t i64;
typedef vector<ull> vull;

#define f first 
#define s second 
#define pb push_back 
#define sz(x) int((x).size())
#define all(x) begin(x), end(x)
#define ts to_string
#define lb lower_bound 
#define ub upper_bound
#define yes cout<<'Y'<<'E'<<'S'<<endl
#define no cout<<'N'<<'O'<<endl
#define nd "\n"

void setIO(string name=""){ios_base::sync_with_stdio(0);cin.tie(0);if(sz(name)){freopen((name+".in").c_str(),"r",stdin);freopen((name+".out").c_str(),"w",stdout);}}
 
ll gcd(ll a, ll b) {return b == 0 ? a : gcd(b, a % b);}
ll mcm(ll a, ll b) {return (a * b) / gcd(a, b);}
bool prime(ll n) {for(int i=2; i<=sqrt(n); i++) if(n%i==0) return false; return true;}
struct compii{bool operator()(const ii &a, const ii &b){if(a.f==a.s)return a.s<b.s;return a.f>b.f;}};
bool comp(int a, int b) {return a>b;}
ll binpow(ll n, ll x){ll ans=1; while(x){if(x&1){ans*=n;}n*=n; x>>=1;} return ans;}

namespace operators {
template<typename T1, typename T2>istream& operator>>(istream& in, pair<T1, T2>& x){in >> x.first >> x.second;return in;}
template<typename T1, typename T2>ostream& operator<<(ostream& out, pair<T1, T2> x){out << x.first << " " << x.second;return out;}
template<typename T1>istream& operator>>(istream& in, vector<T1>& x) {for (auto& i : x) in >> i;return in;}
template<typename T1>ostream& operator<<(ostream& out, vector<T1>& x) {for (auto& i : x) out << i << " ";return out;}
template<typename T1, typename T2>ostream& operator<<(ostream& out, vector<pair <T1,T2>>& x) {for (auto& i : x) out << i.f << " "<<i.s;return out;}
template<typename T1, typename T2>istream& operator>>(istream& in, vector<pair <T1,T2>>& x) {for (auto& i : x) in >> i.f >>i.s;return in;}
}

using namespace operators;

int dx[]= {1,0,-1,0};
int dy[]= {0,1,0,-1};

const int pmod = 998244353;
const int mod = 1e9+7;
const ll inf=1e18;

ll sum(ll a, ll b){
  return (( (a+mod) %mod) + ((b+mod)%mod))%mod;
}

ll multi(ll a, ll b){
  return (((a+mod) %mod) * ((b+mod)%mod))%mod;
}

///

struct FT{
  vector<ll> ft;
  ll n;

  FT(ll m){
    n = m;
    ft.assign(n+1, 0);
  }

  ll lsb(ll i){
    return (i)&(-i);
  }

  void add(ll i, ll k){
    while(i <= n){
      ft[i]+= k;
      i+= lsb(i);
    }
  }

  ll get(ll r){
    ll res = 0;
    while(r){
      res+= ft[r];
      r-= lsb(r);
    }
    return res;
  }

  ll range(ll i, ll j){
    if(i == 0) return get(j);
    return get(j) - get(i-1);
  }
};

void solve(){
  ll n; 
  cin >> n;

  vector<ll> a(n, 0), b;
  for(ll i = 0; i < n; i++){
    cin >> a[i];
  }

  b = a;
  sort(all(b));
  map<ll,ll> compress;

  ll next = 1;
  for(auto v: b){
    if(!compress[v]){
      compress[v] = next++;
    }
  }

  for(ll i = 0; i < n; i++){
    a[i] = compress[a[i]];
  }

  FT left(n), right(n);
  ll l[n], r[n];
  
  for(ll i = 0; i < n; i++){
    l[i] = left.range(1, a[i]-1);
    left.add(a[i], 1);
  }

  for(ll i = n-1; i >= 0; i--){
    r[i] = right.range(1, a[i]-1);
    right.add(a[i], 1);
  }

  ll res = 0; 

  for(ll i = 0; i < n; i++){
    res+= l[i]*r[i];
  }

  cout << res << endl;

}

int main (){
  setIO("");
  int t=1;
  //cin >> t;
  while(t-->0) solve();
  return 0;
}

Compilation message

Mountains.cpp: In function 'void setIO(std::string)':
Mountains.cpp:34:88: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   34 | void setIO(string name=""){ios_base::sync_with_stdio(0);cin.tie(0);if(sz(name)){freopen((name+".in").c_str(),"r",stdin);freopen((name+".out").c_str(),"w",stdout);}}
      |                                                                                 ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Mountains.cpp:34:128: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   34 | void setIO(string name=""){ios_base::sync_with_stdio(0);cin.tie(0);if(sz(name)){freopen((name+".in").c_str(),"r",stdin);freopen((name+".out").c_str(),"w",stdout);}}
      |                                                                                                                         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
2.0 / 2.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 236 ms 33180 KB Output is correct
3 Correct 225 ms 33140 KB Output is correct
4 Correct 210 ms 33180 KB Output is correct
5 Correct 215 ms 33244 KB Output is correct
6 Correct 213 ms 33140 KB Output is correct
7 Correct 201 ms 33168 KB Output is correct
8 Correct 218 ms 33100 KB Output is correct
9 Correct 168 ms 24020 KB Output is correct
10 Correct 170 ms 24144 KB Output is correct

Subtask #2
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 74 ms 14308 KB Output is correct
2 Correct 76 ms 14324 KB Output is correct
3 Correct 59 ms 14388 KB Output is correct
4 Correct 64 ms 14364 KB Output is correct
5 Correct 72 ms 14400 KB Output is correct
6 Correct 72 ms 14284 KB Output is correct
7 Correct 66 ms 14392 KB Output is correct
8 Correct 54 ms 14392 KB Output is correct
9 Correct 57 ms 14396 KB Output is correct
10 Correct 0 ms 212 KB Output is correct

Subtask #3
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 74 ms 14308 KB Output is correct
2 Correct 76 ms 14324 KB Output is correct
3 Correct 59 ms 14388 KB Output is correct
4 Correct 64 ms 14364 KB Output is correct
5 Correct 72 ms 14400 KB Output is correct
6 Correct 72 ms 14284 KB Output is correct
7 Correct 66 ms 14392 KB Output is correct
8 Correct 54 ms 14392 KB Output is correct
9 Correct 57 ms 14396 KB Output is correct
10 Correct 0 ms 212 KB Output is correct
11 Correct 79 ms 14360 KB Output is correct
12 Correct 87 ms 14364 KB Output is correct
13 Correct 77 ms 14372 KB Output is correct
14 Correct 77 ms 14360 KB Output is correct
15 Correct 72 ms 14448 KB Output is correct
16 Correct 74 ms 14448 KB Output is correct
17 Correct 81 ms 14492 KB Output is correct
18 Correct 65 ms 14400 KB Output is correct
19 Correct 57 ms 14404 KB Output is correct
20 Correct 0 ms 212 KB Output is correct

Subtask #4
36.0 / 36.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 356 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 212 KB Output is correct

Subtask #5
28.0 / 28.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 356 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 7 ms 1364 KB Output is correct
12 Correct 8 ms 1344 KB Output is correct
13 Correct 7 ms 1364 KB Output is correct
14 Correct 7 ms 1364 KB Output is correct
15 Correct 8 ms 1364 KB Output is correct
16 Correct 8 ms 1296 KB Output is correct
17 Correct 7 ms 1364 KB Output is correct
18 Correct 7 ms 980 KB Output is correct
19 Correct 3 ms 724 KB Output is correct
20 Correct 0 ms 212 KB Output is correct

Subtask #6
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 74 ms 14308 KB Output is correct
2 Correct 76 ms 14324 KB Output is correct
3 Correct 59 ms 14388 KB Output is correct
4 Correct 64 ms 14364 KB Output is correct
5 Correct 72 ms 14400 KB Output is correct
6 Correct 72 ms 14284 KB Output is correct
7 Correct 66 ms 14392 KB Output is correct
8 Correct 54 ms 14392 KB Output is correct
9 Correct 57 ms 14396 KB Output is correct
10 Correct 0 ms 212 KB Output is correct
11 Correct 79 ms 14360 KB Output is correct
12 Correct 87 ms 14364 KB Output is correct
13 Correct 77 ms 14372 KB Output is correct
14 Correct 77 ms 14360 KB Output is correct
15 Correct 72 ms 14448 KB Output is correct
16 Correct 74 ms 14448 KB Output is correct
17 Correct 81 ms 14492 KB Output is correct
18 Correct 65 ms 14400 KB Output is correct
19 Correct 57 ms 14404 KB Output is correct
20 Correct 0 ms 212 KB Output is correct
21 Correct 251 ms 20348 KB Output is correct
22 Correct 236 ms 20332 KB Output is correct
23 Correct 258 ms 20236 KB Output is correct
24 Correct 253 ms 20300 KB Output is correct
25 Correct 238 ms 20340 KB Output is correct
26 Correct 262 ms 20304 KB Output is correct
27 Correct 216 ms 20248 KB Output is correct
28 Correct 129 ms 20300 KB Output is correct
29 Correct 147 ms 20336 KB Output is correct
30 Correct 0 ms 212 KB Output is correct

Subtask #7
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 236 ms 33180 KB Output is correct
3 Correct 225 ms 33140 KB Output is correct
4 Correct 210 ms 33180 KB Output is correct
5 Correct 215 ms 33244 KB Output is correct
6 Correct 213 ms 33140 KB Output is correct
7 Correct 201 ms 33168 KB Output is correct
8 Correct 218 ms 33100 KB Output is correct
9 Correct 168 ms 24020 KB Output is correct
10 Correct 170 ms 24144 KB Output is correct
11 Correct 74 ms 14308 KB Output is correct
12 Correct 76 ms 14324 KB Output is correct
13 Correct 59 ms 14388 KB Output is correct
14 Correct 64 ms 14364 KB Output is correct
15 Correct 72 ms 14400 KB Output is correct
16 Correct 72 ms 14284 KB Output is correct
17 Correct 66 ms 14392 KB Output is correct
18 Correct 54 ms 14392 KB Output is correct
19 Correct 57 ms 14396 KB Output is correct
20 Correct 0 ms 212 KB Output is correct
21 Correct 79 ms 14360 KB Output is correct
22 Correct 87 ms 14364 KB Output is correct
23 Correct 77 ms 14372 KB Output is correct
24 Correct 77 ms 14360 KB Output is correct
25 Correct 72 ms 14448 KB Output is correct
26 Correct 74 ms 14448 KB Output is correct
27 Correct 81 ms 14492 KB Output is correct
28 Correct 65 ms 14400 KB Output is correct
29 Correct 57 ms 14404 KB Output is correct
30 Correct 0 ms 212 KB Output is correct
31 Correct 1 ms 356 KB Output is correct
32 Correct 1 ms 340 KB Output is correct
33 Correct 1 ms 340 KB Output is correct
34 Correct 1 ms 340 KB Output is correct
35 Correct 1 ms 340 KB Output is correct
36 Correct 1 ms 340 KB Output is correct
37 Correct 1 ms 340 KB Output is correct
38 Correct 1 ms 340 KB Output is correct
39 Correct 1 ms 340 KB Output is correct
40 Correct 1 ms 212 KB Output is correct
41 Correct 7 ms 1364 KB Output is correct
42 Correct 8 ms 1344 KB Output is correct
43 Correct 7 ms 1364 KB Output is correct
44 Correct 7 ms 1364 KB Output is correct
45 Correct 8 ms 1364 KB Output is correct
46 Correct 8 ms 1296 KB Output is correct
47 Correct 7 ms 1364 KB Output is correct
48 Correct 7 ms 980 KB Output is correct
49 Correct 3 ms 724 KB Output is correct
50 Correct 0 ms 212 KB Output is correct
51 Correct 251 ms 20348 KB Output is correct
52 Correct 236 ms 20332 KB Output is correct
53 Correct 258 ms 20236 KB Output is correct
54 Correct 253 ms 20300 KB Output is correct
55 Correct 238 ms 20340 KB Output is correct
56 Correct 262 ms 20304 KB Output is correct
57 Correct 216 ms 20248 KB Output is correct
58 Correct 129 ms 20300 KB Output is correct
59 Correct 147 ms 20336 KB Output is correct
60 Correct 0 ms 212 KB Output is correct
61 Correct 469 ms 33140 KB Output is correct
62 Correct 442 ms 33148 KB Output is correct
63 Correct 444 ms 33184 KB Output is correct
64 Correct 434 ms 33148 KB Output is correct
65 Correct 438 ms 33140 KB Output is correct
66 Correct 431 ms 33140 KB Output is correct
67 Correct 431 ms 33180 KB Output is correct
68 Correct 348 ms 24084 KB Output is correct
69 Correct 264 ms 22512 KB Output is correct
70 Correct 0 ms 212 KB Output is correct