Submission #626534

#	Time	Username	Problem	Language	Result	Execution time	Memory
626534		Do_you_copy	Sirni (COCI17_sirni)	C++17	140 / 140	3084 ms	536168 KiB

sirni

#include <bits/stdc++.h>
//#define int long long
#define fi first
#define se second
#define pb push_back
#define faster ios_base::sync_with_stdio(0); cin.tie(0);
using namespace std;
using ll = long long;
using ull = unsigned ll;
using ld = long double;
using pii = pair <int, int>;
using pil = pair <int, ll>;
using pli = pair <ll, int>;
using pll = pair <ll, ll>;
mt19937 Rand(chrono::steady_clock::now().time_since_epoch().count());

ll min(const ll &a, const ll &b){
    return (a < b) ? a : b;
}

ll max(const ll &a, const ll &b){
    return (a > b) ? a : b;
}

//const ll Mod = 1000000007;
//const ll Mod2 = 999999999989;
//only use when required
const int maxN = 1e5 + 1;
int n;
vector <int> a;
vector <vector <pii>> edge;

struct TDSU{
    vector <pii> save;
    vector <int> lab;
    TDSU(){}
    TDSU(int _n){
        lab.resize(_n, -1);
    }
    inline void resize(int _n){
        lab.resize(_n, -1);
    }
    inline int find_set(int u){
        if (lab[u] < 0) return u;
        return lab[u] = find_set(lab[u]);
    }
    inline int find(int u){
        if (lab[u] < 0) return u;
        return find(lab[u]);
    }
    inline void merge(int u, int v){
        if (lab[u] > lab[v]) swap(u, v);
        save.pb({v, lab[v]});
        lab[u] += lab[v];
        lab[v] = u;
    }
    inline void undo(){

        int v = save.back().fi;
        int u = lab[v];
        lab[v] = save.back().se;
        lab[u] -= lab[v];
        save.pop_back();
    }
    inline void clear(){
        lab.clear();
        save.clear();
    }
    inline void reset(int _n){
        clear();
        resize(_n);
    }
    inline void roll_back(int _n){
        while (save.size() > _n) undo();
    }
};

TDSU dsu;

void Init(){
    cin >> n;
    for (int i = 1; i <= n; ++i){
        int x; cin >> x;
        a.pb(x);
    }
    sort(a.begin(), a.end());
    a.resize(unique(a.begin(), a.end()) - a.begin());
    edge.resize(a.back() + 1);
    for (int _ = 0; _ < a.size() - 1; ++_){
        int i = a[_], j = 1;
        while (i * j <= a.back()){
            int k;
            if (j == 1) k = upper_bound(a.begin(), a.end(), i) - a.begin();
            else k = lower_bound(a.begin(), a.end(), i * j) - a.begin();
            edge[a[k] % i].pb({_, k});
            j = a[k] / i + 1;
        }
    }
    dsu.resize(n);
    ll ans = 0;
    for (int i = 0; i <= a.back(); ++i){
        for (auto e: edge[i]){
            int u = e.fi, v = e.se;
            int x = dsu.find_set(u), y = dsu.find_set(v);
            if (x == y && dsu.lab[x] == -n){
                cout << ans;
                return;
            }
            else if (x != y){
                ans += i;
                dsu.merge(x, y);
            }
        }
    }
    cout << ans << "\n";
}

#define debu
#define taskname "test"
signed main(){
    if (fopen(taskname".inp", "r")){
        freopen(taskname".inp", "r", stdin);
        #ifdef debug
        freopen(taskname".out", "w", stdout);
        #endif
    }
    faster;
    ll tt = 1;
    //cin >> tt;
    while (tt--){
        Init();
    }
    if (fopen("timeout.txt", "r")){
        ofstream timeout("timeout.txt");
        timeout << 1000 * double(clock()) / CLOCKS_PER_SEC;
        #ifndef debug
        cerr << "\nTime elapsed: " << 1000 * double(clock()) / CLOCKS_PER_SEC << "ms\n";
        #endif
    }
}

Compilation message (stderr)

sirni.cpp: In member function 'void TDSU::roll_back(int)':
sirni.cpp:74:28: warning: comparison of integer expressions of different signedness: 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   74 |         while (save.size() > _n) undo();
      |                ~~~~~~~~~~~~^~~~
sirni.cpp: In function 'void Init()':
sirni.cpp:89:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   89 |     for (int _ = 0; _ < a.size() - 1; ++_){
      |                     ~~^~~~~~~~~~~~~~
sirni.cpp: In function 'int main()':
sirni.cpp:122:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  122 |         freopen(taskname".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 14 / 14
• Subtask 2: 14 / 14
• Subtask 3: 14 / 14
• Subtask 4: 14 / 14
• Subtask 5: 14 / 14
• Subtask 6: 14 / 14
• Subtask 7: 14 / 14
• Subtask 8: 14 / 14
• Subtask 9: 14 / 14
• Subtask 10: 14 / 14