Submission #370749

#	Time	Username	Problem	Language	Result	Execution time	Memory
370749		Atill83	Sirni (COCI17_sirni)	C++14	0 / 140	249 ms	275444 KiB

sirni

#include <bits/stdc++.h>
#define ff first
#define ss second
#define endl '\n'
using namespace std;
const long long INF = (long long) 1e18;
const int mod = (int) 1e9+7;
const int MAXN = (int) 3e5+5;
const int MAXM = (int) 1e7+5;
typedef long long ll;
typedef unsigned long long ull;
typedef pair<int,int> pii;
typedef pair<ll,ll> pll;
ll n;
int p[MAXN];
int buy[MAXM];

vector<pii> edg[MAXM];

int par[MAXN];
int sz[MAXN];
int find_set(int p){
    if(par[p] == p)
        return p;
    return par[p] = find_set(par[p]);
}

int merge(int a, int b){
    if(sz[b] > sz[a])
        swap(a, b);
    par[b] = a;
    sz[a] += sz[b];
}



int main(){
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);cout.tie(nullptr);

    #ifdef Local
        freopen("C:/Users/Admin/Desktop/Yazilim/C/IO/int.txt","r",stdin);
        freopen("C:/Users/Admin/Desktop/Yazilim/C/IO/out.txt","w",stdout);
    #endif

    /*cout<<"100000"<<endl;
    for(int i = 2; i < 1e7; i+=100)
        cout<<i<<" ";
    return 0;
    */
    cin>>n;
    memset(buy, -1, sizeof(buy));
    for(int i = 0; i < n; i++){
        cin>>p[i];
        if(p[i] == 1){
            cout<<0<<endl;
            return 0;
        }
    }


    sort(p, p + n);
    n = (unique(p, p + n) - p);

    for(int i = 0; i < n; i++){
        buy[p[i]] = i;
        par[i] = i;
        sz[i] = 1;
    }
    for(int i = MAXM - 1; i > 0; i--){
        if(buy[i - 1] == -1)
            buy[i - 1] = buy[i];
    }
    return 0;

    for(int i = 0; i < n; i++){
        int fir = buy[p[i] + 1];
        if(fir != -1 && p[fir] < 2*p[i]){
            assert(p[fir] - p[i] >= 0);
            edg[p[fir] - p[i]].push_back({i, fir});
        }
        for(int j = 2*p[i]; j < MAXM; j += p[i])
            if(buy[j] != -1 && p[buy[j]] < j + p[i]){
                assert(p[buy[j]] - j >= 0);
                edg[p[buy[j]] - j].push_back({i, buy[j]});
            }
    }
    ll ans = 0;
    for(int i = 0; i < MAXM; i++){
        for(int j = 0; j < edg[i].size(); j++){
            pii u = edg[i][j];
            int a = find_set(u.ff), b = find_set(u.ss);
            if(a != b){
                ans += i;
                merge(a, b);
            }
        }
    }

    assert(sz[find_set(0)] == n);

    cout<<ans<<endl;


    #ifdef Local
        cout<<endl<<fixed<<setprecision(2)<<1000.0 * clock() / CLOCKS_PER_SEC<< " milliseconds ";
    #endif
}

Compilation message (stderr)

sirni.cpp: In function 'int merge(int, int)':
sirni.cpp:33:1: warning: no return statement in function returning non-void [-Wreturn-type]
   33 | }
      | ^
sirni.cpp: In function 'int main()':
sirni.cpp:90:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   90 |         for(int j = 0; j < edg[i].size(); j++){
      |                        ~~^~~~~~~~~~~~~~~

• Subtask 1: 0 / 14
• Subtask 2: 0 / 14
• Subtask 3: 0 / 14
• Subtask 4: 0 / 14
• Subtask 5: 0 / 14
• Subtask 6: 0 / 14
• Subtask 7: 0 / 14
• Subtask 8: 0 / 14
• Subtask 9: 0 / 14
• Subtask 10: 0 / 14