oj.uz

Submission #570242

# Submission time Handle Problem Language Result Execution time Memory
570242 2022-05-28T21:44:05 Z Joshi503 Mountains (NOI20_mountains) C++14
79 / 100
 228 ms 262144 KB 
#include <bits/stdc++.h>
using namespace std;

using ll = long long;
using db = long double;
using str = string;
using pi = pair<int, int>;
using pl = pair<ll, ll>;
using pd = pair<db, db>;
#define f first
#define s second

#define tcT template<class T
#define tcTU tcT, class U
tcT> using V = vector<T>;
tcT, size_t SZ > using AR = array<T, SZ>;
using vi = V<int>;
using vb = V<bool>;
using vl = V<ll>;
using vd = V<db>;
using vs = V<str>;
using vpi = V<pi>;
using vpl = V<pl>;

#define sz(x) int((x).size())
#define bg(x) begin(x)
#define all(x) bg(x), end(x)
#define rall(x) x.rbegin(), x.rend() 
#define sor(x) sort(all(x)) 
#define pb push_back

#define FOR(i,a,b) for (int i = (a); i < (b); ++i)
#define F0R(i,a) FOR(i,0,a)
#define ROF(i,a,b) for (int i = ((b)-1); i >= (a); --i)
#define R0F(i,a) ROF(i,0,a)
#define rep(a) F0R(_,a)
#define each(a,x) for (auto& a: x)

const ll MOD = 1e9 + 7;
const ll MX = 1e9;
const ll INF = 1e18;
const db PI = acos((db)-1);
const int ddef[4]{ 1,0,-1,0 }, dataq[4]{ 0,1,0,-1 };
mt19937 rng((uint32_t)chrono::steady_clock::now().time_since_epoch().count());
template<class T> using pqg = priority_queue<T, vector<T>, greater<T>>;

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);
    }
}

void _print(char i) { cerr << i; }
void _print(string i) { cerr << i; }
void _print(float i) { cerr << i; }
void _print(int i) { cerr << i; }
void _print(double i) { cerr << i; }
void _print() { cerr << "\n"; };
template<typename x, typename y> void _print(pair<x, y>& t) { cerr << "{";_print(t.first);cerr << ", ";_print(t.second);cerr << "},"; }
template<typename x> void _print(x& t) { cerr << "{"; for (int i = 0;i < (int)t.size();i++) { _print(t[i]); if (i < (int)t.size() - 1) cerr << ", "; } cerr << "}"; }
template<typename x, typename... y> void _print(x a, y... b) { _print(a);if (sizeof...(b)) cerr << ", ";_print(b...); }
#define dbg(x...) cerr<<"["<<#x<<"] = [";_print(x);cerr<<"]\n";

int test;

void solve() {

    ll n; cin >> n;
    vl a(n);
    each(x, a) cin >> x;
    vl b = a;
    sor(b);
    if(a == b){
        cout << "0\n";
        return;
    }
    if(n <= 10000){
        ll ans = 0;
        FOR(i, 1, n - 1){
            ll cnt1 = 0, cnt2 = 0;
            for(ll j = 0; j < i; j++){
                if(a[i] > a[j]) cnt1++;
            }
            for(ll j = i + 1; j < n; j++){
                if(a[i] > a[j]) cnt2++;
            }
            ans += cnt1 * cnt2;
        }
        cout << ans << "\n";
        return;
    }
    map<ll, ll> m;
    ll cnt = 0;
    F0R(i, n){
        if(!m[b[i]]){
            m[b[i]] = cnt++;
        }
    }
    ll pref[n + 1][cnt];
    F0R(i, n){
        a[i] = m[a[i]];
    }
    F0R(i, n + 1){
        F0R(j, cnt){
            pref[i][j] = 0;
        }
    }
    for(ll i = 0; i < n; i++){
        for(ll j = 0; j < cnt; j++){
            pref[i + 1][j] = pref[i][j] + (j > a[i]);
        }
    }
    ll ans = 0;
    FOR(i, 1, n - 1){
        // cout << pref[i][a[i]] - pref[i - 1][a[i]] << " " << pref[n][a[i]] - pref[i][a[i]] << "\n";
        ans += (pref[i][a[i]]) * (pref[n][a[i]] - pref[i + 1][a[i]]);
    }
    for(ll j = 0; j < cnt; j++){
        for(ll i = 0; i < n + 1; i++){
        }
    } 

    cout << ans << "\n";
 
}

int main() {
    setIO("");
    int T = 1;
    // cin >> T;
    for (test = 1; test <= T; test++) solve();
    return 0;
}

Compilation message

Mountains.cpp: In function 'void setIO(std::string)':
Mountains.cpp:50:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   50 |         freopen((name + ".in").c_str(), "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Mountains.cpp:51:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   51 |         freopen((name + ".out").c_str(), "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
2.0 / 2.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 55 ms 4976 KB Output is correct
3 Correct 57 ms 4976 KB Output is correct
4 Correct 57 ms 4976 KB Output is correct
5 Correct 55 ms 4972 KB Output is correct
6 Correct 56 ms 4940 KB Output is correct
7 Correct 49 ms 4984 KB Output is correct
8 Correct 52 ms 5016 KB Output is correct
9 Correct 59 ms 4976 KB Output is correct
10 Correct 52 ms 4980 KB Output is correct

Subtask #2
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 31 ms 11980 KB Output is correct
2 Correct 31 ms 11936 KB Output is correct
3 Correct 33 ms 11960 KB Output is correct
4 Correct 34 ms 12016 KB Output is correct
5 Correct 39 ms 12020 KB Output is correct
6 Correct 35 ms 12028 KB Output is correct
7 Correct 33 ms 12048 KB Output is correct
8 Correct 19 ms 4988 KB Output is correct
9 Correct 20 ms 4948 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 31 ms 11980 KB Output is correct
2 Correct 31 ms 11936 KB Output is correct
3 Correct 33 ms 11960 KB Output is correct
4 Correct 34 ms 12016 KB Output is correct
5 Correct 39 ms 12020 KB Output is correct
6 Correct 35 ms 12028 KB Output is correct
7 Correct 33 ms 12048 KB Output is correct
8 Correct 19 ms 4988 KB Output is correct
9 Correct 20 ms 4948 KB Output is correct
10 Correct 0 ms 212 KB Output is correct
11 Correct 214 ms 242212 KB Output is correct
12 Correct 223 ms 242204 KB Output is correct
13 Correct 210 ms 242284 KB Output is correct
14 Correct 215 ms 242212 KB Output is correct
15 Correct 228 ms 242204 KB Output is correct
16 Correct 203 ms 242192 KB Output is correct
17 Correct 220 ms 242112 KB Output is correct
18 Correct 21 ms 4992 KB Output is correct
19 Correct 21 ms 4984 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 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 1 ms 212 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 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 79 ms 468 KB Output is correct
12 Correct 73 ms 468 KB Output is correct
13 Correct 76 ms 468 KB Output is correct
14 Correct 75 ms 456 KB Output is correct
15 Correct 79 ms 468 KB Output is correct
16 Correct 79 ms 468 KB Output is correct
17 Correct 75 ms 468 KB Output is correct
18 Correct 76 ms 468 KB Output is correct
19 Correct 88 ms 468 KB Output is correct
20 Correct 0 ms 212 KB Output is correct

Subtask #6
0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 31 ms 11980 KB Output is correct
2 Correct 31 ms 11936 KB Output is correct
3 Correct 33 ms 11960 KB Output is correct
4 Correct 34 ms 12016 KB Output is correct
5 Correct 39 ms 12020 KB Output is correct
6 Correct 35 ms 12028 KB Output is correct
7 Correct 33 ms 12048 KB Output is correct
8 Correct 19 ms 4988 KB Output is correct
9 Correct 20 ms 4948 KB Output is correct
10 Correct 0 ms 212 KB Output is correct
11 Correct 214 ms 242212 KB Output is correct
12 Correct 223 ms 242204 KB Output is correct
13 Correct 210 ms 242284 KB Output is correct
14 Correct 215 ms 242212 KB Output is correct
15 Correct 228 ms 242204 KB Output is correct
16 Correct 203 ms 242192 KB Output is correct
17 Correct 220 ms 242112 KB Output is correct
18 Correct 21 ms 4992 KB Output is correct
19 Correct 21 ms 4984 KB Output is correct
20 Correct 0 ms 212 KB Output is correct
21 Runtime error 188 ms 262144 KB Execution killed with signal 9
22 Halted 0 ms 0 KB -

Subtask #7
0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 55 ms 4976 KB Output is correct
3 Correct 57 ms 4976 KB Output is correct
4 Correct 57 ms 4976 KB Output is correct
5 Correct 55 ms 4972 KB Output is correct
6 Correct 56 ms 4940 KB Output is correct
7 Correct 49 ms 4984 KB Output is correct
8 Correct 52 ms 5016 KB Output is correct
9 Correct 59 ms 4976 KB Output is correct
10 Correct 52 ms 4980 KB Output is correct
11 Correct 31 ms 11980 KB Output is correct
12 Correct 31 ms 11936 KB Output is correct
13 Correct 33 ms 11960 KB Output is correct
14 Correct 34 ms 12016 KB Output is correct
15 Correct 39 ms 12020 KB Output is correct
16 Correct 35 ms 12028 KB Output is correct
17 Correct 33 ms 12048 KB Output is correct
18 Correct 19 ms 4988 KB Output is correct
19 Correct 20 ms 4948 KB Output is correct
20 Correct 0 ms 212 KB Output is correct
21 Correct 214 ms 242212 KB Output is correct
22 Correct 223 ms 242204 KB Output is correct
23 Correct 210 ms 242284 KB Output is correct
24 Correct 215 ms 242212 KB Output is correct
25 Correct 228 ms 242204 KB Output is correct
26 Correct 203 ms 242192 KB Output is correct
27 Correct 220 ms 242112 KB Output is correct
28 Correct 21 ms 4992 KB Output is correct
29 Correct 21 ms 4984 KB Output is correct
30 Correct 0 ms 212 KB Output is correct
31 Correct 1 ms 212 KB Output is correct
32 Correct 1 ms 212 KB Output is correct
33 Correct 1 ms 212 KB Output is correct
34 Correct 1 ms 212 KB Output is correct
35 Correct 1 ms 212 KB Output is correct
36 Correct 1 ms 212 KB Output is correct
37 Correct 1 ms 212 KB Output is correct
38 Correct 1 ms 212 KB Output is correct
39 Correct 1 ms 212 KB Output is correct
40 Correct 1 ms 212 KB Output is correct
41 Correct 79 ms 468 KB Output is correct
42 Correct 73 ms 468 KB Output is correct
43 Correct 76 ms 468 KB Output is correct
44 Correct 75 ms 456 KB Output is correct
45 Correct 79 ms 468 KB Output is correct
46 Correct 79 ms 468 KB Output is correct
47 Correct 75 ms 468 KB Output is correct
48 Correct 76 ms 468 KB Output is correct
49 Correct 88 ms 468 KB Output is correct
50 Correct 0 ms 212 KB Output is correct
51 Runtime error 188 ms 262144 KB Execution killed with signal 9
52 Halted 0 ms 0 KB -