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Submission #1089086

# Submission time Handle Problem Language Result Execution time Memory
1089086 2024-09-16T01:47:33 Z kh0i Palembang Bridges (APIO15_bridge) C++17
22 / 100
 32 ms 7380 KB 
#include "bits/stdc++.h"
using namespace std;

#ifdef LOCAL
#include "debug.h"
#else
#define debug(...)
#endif

using ll = long long;
using pii = pair<int, int>;

#define F first
#define S second
#define sz(x) (int)((x).size())
#define all(x) (x).begin(), (x).end()

mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count());
ll get_rand(ll l, ll r) {
    assert(l <= r);
    return uniform_int_distribution<ll> (l, r)(rng);
}

int k, n;
vector<pair<ll, ll>> a;
ll res;

namespace Sub1{
    void solve(){
        vector<ll> x;
        for(auto [s, t] : a){
            x.push_back(s);
            x.push_back(t);
        }
        sort(all(x));

        ll pos = x[sz(x) / 2];
        for(ll k : x)
            res += abs(k - pos);

        cout << res + sz(a);
    }
}

struct SlidingMedian{
    multiset<ll> fi, se;
    ll sum_fi = 0, sum_se = 0;

    void add(ll x){
        se.insert(x);
        sum_se += x;
        while(sz(fi) < sz(se)){
            ll d = *se.begin();
            sum_se -= d;
            sum_fi += d;
            fi.insert(d);
            se.erase(se.begin());
        }
    }

    ll get_sum(){
        ll med = *fi.rbegin();
        return (1ll * sz(fi) * med - sum_fi) + (sum_se - 1ll * sz(se) * med);
    }

    void reset(){
        fi.clear();
        se.clear();
        sum_fi = sum_se = 0;
    }
};

namespace Sub2{
    void solve(){
        sort(all(a), [](pair<ll, ll> &f, pair<ll, ll> &g) -> bool{
            return f.F + f.S < g.F + g.S;
        });

        vector<ll> pre(sz(a)), suf(sz(a));
        SlidingMedian st;
        for(int i = 0; i < sz(a); ++i){
            st.add(a[i].F);
            st.add(a[i].S);
            pre[i] = st.get_sum();
        }
        st.reset();
        for(int i = sz(a) - 1; i >= 0; --i){
            st.add(a[i].F);
            st.add(a[i].S);
            suf[i] = st.get_sum();
        }

        ll mn = suf[0];
        for(int i = 0; i < sz(a) - 1; ++i)
            mn = min(mn, pre[i] + suf[i + 1]);

        cout << res + mn + sz(a);
    }
}

void solve(){
    cin >> k >> n;
    for(int i = 1; i <= n; ++i){
        char p, q;
        int s, t;
        cin >> p >> s >> q >> t;
        if(p == q)
            res += abs(s - t);
        else{
            if(s > t)
                swap(s, t);
            a.push_back({s, t});
        }
    }

    if(k == 1)
        Sub1::solve();
    else
        Sub2::solve();
}

int32_t main() {
    cin.tie(nullptr)->sync_with_stdio(0);
    #define task "troll"
    if(fopen(task".inp", "r")){
        freopen(task".inp", "r", stdin);
        freopen(task".out", "w", stdout);
    }
    int test = 1;
//    cin >> test;
    for(int i = 1; i <= test; ++i){
//        cout << "Case #" << i << ": ";
        solve();
    }
    #ifdef LOCAL
        cerr << "\n[Time]: " << 1000.0 * clock() / CLOCKS_PER_SEC << " ms.\n";
    #endif
    return 0;
}

Compilation message

bridge.cpp: In function 'int32_t main()':
bridge.cpp:126:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  126 |         freopen(task".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
bridge.cpp:127:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  127 |         freopen(task".out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 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 0 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 1 ms 348 KB Output is correct

Subtask #2
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 1 ms 472 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 1 ms 600 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Correct 17 ms 5840 KB Output is correct
13 Correct 32 ms 7380 KB Output is correct
14 Correct 24 ms 6096 KB Output is correct
15 Correct 21 ms 4312 KB Output is correct
16 Correct 19 ms 6528 KB Output is correct
17 Correct 22 ms 7380 KB Output is correct
18 Correct 25 ms 7004 KB Output is correct
19 Correct 31 ms 7372 KB Output is correct
20 Correct 21 ms 6868 KB Output is correct
21 Correct 30 ms 7164 KB Output is correct

Subtask #3
0 / 9.0

# Verdict Execution time Memory Grader output
1 Runtime error 1 ms 604 KB Execution killed with signal 11
2 Halted 0 ms 0 KB -

Subtask #4
0 / 32.0

# Verdict Execution time Memory Grader output
1 Runtime error 1 ms 604 KB Execution killed with signal 11
2 Halted 0 ms 0 KB -

Subtask #5
0 / 37.0

# Verdict Execution time Memory Grader output
1 Runtime error 1 ms 604 KB Execution killed with signal 11
2 Halted 0 ms 0 KB -