Submission #635236

#	Time	Username	Problem	Language	Result	Execution time	Memory
635236		IWTIM	Zoltan (COCI16_zoltan)	C++14	98 / 140	362 ms	17968 KiB

zoltan

# include <bits/stdc++.h>
using namespace std;
using ll = long long;
using db = long double; // or double, if TL is tight
using str = string; // yay python! 
 
// pairs
using pii = pair<int,int>;
using pl = pair<ll,ll>;
using pd = pair<db,db>;
#define mp make_pair
#define f first
#define s second
 
#define tcT template<class T
#define tcTU tcT, class U
// ^ lol this makes everything look weird but I'll try it
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<pii>;
using vpl = V<pl>;
using vpd = V<pd>;
 
// vectors
// oops size(x), rbegin(x), rend(x) need C++17
#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 rsz resize
#define ins insert 
#define pb push_back
#define eb emplace_back
#define ft front()
#define bk back()
 
#define lb lower_bound
#define ub upper_bound
#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 int mod = 1e9 + 7;
const int N = 3e5+5;
const ll BIG = 1e18; // not too close to LLONG_MAX
const db PI = acos((db)-1);
const int dx[4]{1,0,-1,0}, dy[4]{0,1,0,-1}; // for every grid problem!!
mt19937 rng((uint32_t)chrono::steady_clock::now().time_since_epoch().count()); 
template<class T> using pqg = priority_queue<T,vector<T>,greater<T>>;
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 sameSet(int a, int b) { return get(a) == get(b); }
	int size(int x) { return -e[get(x)]; }
	bool unite(int x, int y) { // union by size
		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;
	}
};
/*
inline namespace Helpers {
	//////////// is_iterable
	// https://stackoverflow.com/questions/13830158/check-if-a-variable-type-is-iterable
	// this gets used only when we can call begin() and end() on that type
	tcT, class = void> struct is_iterable : false_type {};
	tcT> struct is_iterable<T, void_t<decltype(begin(declval<T>())),
	                                  decltype(end(declval<T>()))
	                                 >
	                       > : true_type {};
	tcT> constexpr bool is_iterable_v = is_iterable<T>::value;
 
	//////////// is_readable
	tcT, class = void> struct is_readable : false_type {};
	tcT> struct is_readable<T,
	        typename std::enable_if_t<
	            is_same_v<decltype(cin >> declval<T&>()), istream&>
	        >
	    > : true_type {};
	tcT> constexpr bool is_readable_v = is_readable<T>::value;
 
	//////////// is_printable
	// // https://nafe.es/posts/2020-02-29-is-printable/
	tcT, class = void> struct is_printable : false_type {};
	tcT> struct is_printable<T,
	        typename std::enable_if_t<
	            is_same_v<decltype(cout << declval<T>()), ostream&>
	        >
	    > : true_type {};
	tcT> constexpr bool is_printable_v = is_printable<T>::value;
}*/
using ll = long long;
using db = long double; // or double, if TL is tight
using str = string; // yay python! 
 
// pairs
using pii = pair<int,int>;
using pl = pair<ll,ll>;
using pd = pair<db,db>;
#define mp make_pair
#define f first
#define s second
 
#define tcT template<class T
#define tcTU tcT, class U
// ^ lol this makes everything look weird but I'll try it
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<pii>;
using vpl = V<pl>;
using vpd = V<pd>;
 
// vectors
// oops size(x), rbegin(x), rend(x) need C++17
#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 rsz resize
#define ins insert 
#define pb push_back
#define eb emplace_back
#define ft front()
#define bk back()
 
#define lb lower_bound
#define ub upper_bound
#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)
template<class T> using pqg = priority_queue<T,vector<T>,greater<T>>;
 
/*
inline namespace Helpers {
	//////////// is_iterable
	// https://stackoverflow.com/questions/13830158/check-if-a-variable-type-is-iterable
	// this gets used only when we can call begin() and end() on that type
	tcT, class = void> struct is_iterable : false_type {};
	tcT> struct is_iterable<T, void_t<decltype(begin(declval<T>())),
	                                  decltype(end(declval<T>()))
	                                 >
	                       > : true_type {};
	tcT> constexpr bool is_iterable_v = is_iterable<T>::value;
 
	//////////// is_readable
	tcT, class = void> struct is_readable : false_type {};
	tcT> struct is_readable<T,
	        typename std::enable_if_t<
	            is_same_v<decltype(cin >> declval<T&>()), istream&>
	        >
	    > : true_type {};
	tcT> constexpr bool is_readable_v = is_readable<T>::value;
 
	//////////// is_printable
	// // https://nafe.es/posts/2020-02-29-is-printable/
	tcT, class = void> struct is_printable : false_type {};
	tcT> struct is_printable<T,
	        typename std::enable_if_t<
	            is_same_v<decltype(cout << declval<T>()), ostream&>
	        >
	    > : true_type {};
	tcT> constexpr bool is_printable_v = is_printable<T>::value;
}*/
#define dec decc
#define int long long
int n,a[N],inc[N],dec[N],cntinc[N],cntdec[N];
pii tree[4 * N][2];
pii merge(pii a, pii b){
    pii c = {0,0};
    if (a.f != b.f) c = max(a,b);
    else c = {a.f, b.s + a.s};
    return c;
}
void update(int node, int le, int ri, int idx, int val, int raod, int ty) {
    if (le > idx || ri < idx) return ;
    if (le == ri) {
        if (tree[node][ty].f > val) return ;
        if (tree[node][ty].f < val) {
            tree[node][ty] = {val, raod};
            return ;
        }
        tree[node][ty].s += raod;
        return ;
    }
    int mid = (le + ri) / 2;
    update(2 * node,le,mid,idx,val,raod,ty);
    update(2 * node + 1, mid + 1, ri, idx,val,raod,ty);
    tree[node][ty] = merge(tree[2 * node][ty], tree[2 * node + 1][ty]);
}
pii getans(int node, int le, int ri, int start, int end,int ty) {
    if (le > end || ri < start) return {0,0};
    if (le >= start && ri <= end) {
        return tree[node][ty];
    }
    int mid = (le + ri) / 2;
    return merge(getans(2 * node,le,mid,start,end,ty), getans(2 * node + 1, mid + 1, ri, start,end,ty));
}
main() {
    std::ios_base::sync_with_stdio(false),cin.tie(0),cout.tie(0);
    vector < pii > v;
    cin>>n;
    for (int i = 1; i <= n; i++) {
        cin>>a[i];
        v.pb({a[i],i});
    }
    sort(v.begin(), v.end());
    a[v[0].s] = 1;
    for (int i = 1; i < v.size(); i++) {
        if (v[i].f != v[i - 1].f) a[v[i].s] = a[v[i - 1].s] + 1; 
        else a[v[i].s] = a[v[i - 1].s];
    }
    
    int mx = 0;
    int ans = 0;
    for (int i = n; i >= 1; i--) {
        inc[i] = getans(1,1,n,a[i] + 1,n,0).f + 1;
        dec[i] = getans(1,1,n,1,a[i] - 1,1).f + 1;
        
        cntinc[i] = getans(1,1,n,a[i] + 1, n, 0).s;
        cntdec[i] = getans(1,1,n,1,a[i] - 1, 1).s;
        if (cntinc[i] == 0) cntinc[i] = 1; if (cntdec[i] == 0) cntdec[i] = 1;
        update(1,1,n, a[i], inc[i], cntinc[i],0);
        update(1,1,n, a[i], dec[i], cntdec[i],1);
        mx = max(mx, inc[i] + dec[i] - 1);
    }
    for (int i = n; i >= 1; i--) {
        if (inc[i] + dec[i] - 1 == mx) {
            ans += (cntinc[i] * cntdec[i]) % mod;
            ans %= mod;
        }
    }
    int x = 1;
    for (int i = 1; i <= n - mx; i++) x *= 2LL, x %= mod;
    cout<<mx<<" "<<ans * x % mod<<"\n";
}

Compilation message (stderr)

zoltan.cpp:215:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
  215 | main() {
      | ^~~~
zoltan.cpp: In function 'int main()':
zoltan.cpp:225:23: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::pair<int, int>, std::allocator<std::pair<int, int> > >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  225 |     for (int i = 1; i < v.size(); i++) {
      |                     ~~^~~~~~~~~~
zoltan.cpp:238:9: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
  238 |         if (cntinc[i] == 0) cntinc[i] = 1; if (cntdec[i] == 0) cntdec[i] = 1;
      |         ^~
zoltan.cpp:238:44: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'if'
  238 |         if (cntinc[i] == 0) cntinc[i] = 1; if (cntdec[i] == 0) cntdec[i] = 1;
      |                                            ^~

• Subtask 1: 98 / 140