Submission #385224

#	Time	Username	Problem	Language	Result	Execution time	Memory
385224		ignaciocanta	Sirni (COCI17_sirni)	C++14	84 / 140	3011 ms	786436 KiB

sirni

#include <bits/stdc++.h>
 
using namespace std;
 
using tint = long long;
using ld = long double;
 
#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 trav(a,x) for (auto& a: x)
 
using pi = pair<int,int>;
using pl = pair<tint,tint>;
using vi = vector<int>;
using vpi = vector<pi>;
using vpl = vector<pl>;
using vvi = vector<vi>;
using vl = vector<tint>;
using vb = vector<bool>;
 
#define pb push_back
#define pf push_front
#define rsz resize
#define all(x) begin(x), end(x)
#define rall(x) x.rbegin(), x.rend() 
#define sz(x) (int)(x).size()
#define ins insert
 
#define f first
#define s second
#define mp make_pair
 
#define DBG(x) cerr << #x << " = " << x << endl;
 
const int MOD = 1e9+7;
const tint mod = 998244353;
const int MX = 1e5+5;
const tint INF = 1e18; 
const int inf = 2e9;
const ld PI = acos(ld(-1)); 
const ld eps = 1e-5;
 
const int dx[4] = {1, -1, 0, 0};
const int dy[4] = {0, 0, 1, -1};
 
template<class T> void remDup(vector<T> &v){ 
    sort(all(v)); v.erase(unique(all(v)),end(v));
}
 
template<class T> bool ckmin(T& a, const T& b) {
    return b < a ? a = b, 1 : 0; 
} 
template<class T> bool ckmax(T& a, const T& b) {
    return a < b ? a = b, 1 : 0; 
}
 
bool valid(int x, int y, int n, int m){
    return (0<=x && x<n && 0<=y && y<m);
}
 
int cdiv(int a, int b) { return a/b+((a^b)>0&&a%b); } //redondea p arriba
int fdiv(int a, int b) { return a/b-((a^b)<0&&a%b); } //redondea p abajo
 
void NACHO(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);
	}
}
 
vi a;
vector<pair<tint, pi>> ed;
 
struct DSU{
    vi e; void init(int N){ e = vi(N, -1); }
    int get(int x){ return e[x] < 0 ? x : e[x] = get(e[x]); }
    bool unite(int x, int y){
        x = get(x), y = get(y); if(x == y) return 0;
        if(e[x] > e[y]) swap(x, y);
        e[x] += e[y]; e[y] = x; return 1;
    }
};
 
int main(){
	NACHO();
	int n; cin >> n;
    a.rsz(n);
    F0R(i, n) cin >> a[i];
    remDup(a);
    assert(is_sorted(all(a)));
    n = sz(a);
    F0R(i, n){
        int id = upper_bound(all(a), a[i])-a.begin();
        if(id != n) ed.pb(mp(a[id] % a[i], mp(id, i)));
        for(int k = 2*a[i]; k <= a.back(); k += a[i]){
            id = lower_bound(all(a), k)-a.begin();
            if(id != n) ed.pb(mp(a[id] % a[i], mp(id, i)));
        }
    }
    sort(all(ed));
    DSU D; D.init(n);
    tint ans = 0;
    trav(o, ed){
        int u = o.s.f, v = o.s.s;
        if(D.unite(u, v)) ans += o.f;
    }
    cout << ans << "\n";
}

Compilation message (stderr)

sirni.cpp: In function 'void NACHO(std::string)':
sirni.cpp:69:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   69 |   freopen((name+".in").c_str(), "r", stdin);
      |   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
sirni.cpp:70:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   70 |   freopen((name+".out").c_str(), "w", stdout);
      |   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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