1283E - New Year Parties
#include <iostream> #include <vector> #include <algorithm> #include <string> #include <set> #include <queue> #include <map> #include <sstream> #include <cstdio> #include <cstring> #include <numeric> #include <cmath> #include <iomanip> #include <deque> #include <bitset> //#include <unordered_set> //#include <unordered_map> #define ll long long #define pii pair<int, int> #define rep(i,a,b) for(ll i=a;i<=b;i++) #define dec(i,a,b) for(ll i=a;i>=b;i--) #define forn(i, n) for(ll i = 0; i < int(n); i++) using namespace std; int dir[4][2] = { { 1,0 },{ 0,1 } ,{ 0,-1 },{ -1,0 } }; const long long INF = 0x7f7f7f7f7f7f7f7f; const int inf = 0x3f3f3f3f; const double pi = 3.14159265358979323846; const double eps = 1e-6; const int mod = 998244353; const int N = 2e5 + 5; //if(x<0 || x>=r || y<0 || y>=c) inline ll read() { ll x = 0; bool f = true; char c = getchar(); while (c < '0' || c > '9') { if (c == '-') f = false; c = getchar(); } while (c >= '0' && c <= '9') x = (x << 1) + (x << 3) + (c ^ 48), c = getchar(); return f ? x : -x; } ll gcd(ll m, ll n) { return n == 0 ? m : gcd(n, m % n); } ll lcm(ll m, ll n) { return m * n / gcd(m, n); } bool prime(int x) { if (x < 2) return false; for (int i = 2; i * i <= x; ++i) { if (x % i == 0) return false; } return true; } inline int qpow(int x, ll n) { int r = 1; while (n > 0) { if (n & 1) r = 1ll * r * x % mod; n >>= 1; x = 1ll * x * x % mod; } return r; } inline int add(int x, int y) { return ((x%mod)+(y%mod))%mod; } inline int sub(int x, int y) { x -= y; return x < 0 ? x += mod : x; } inline int mul(int x, int y) { return (1ll * (x %mod) * (y % mod))%mod; } inline int Inv(int x) { return qpow(x, mod - 2); } int a[N]; int main() { int n, minn = 0, maxn = 0; cin >> n; rep(i, 1, n) { int t; cin >> t; a[t]++; } rep(i, 1, n) if (a[i]) i += 2,minn++; rep(i, 0, n) { if (a[i] == 0 && a[i + 1]) a[i]++, a[i + 1]--; else if (a[i] > 1) a[i]--, a[i + 1]++; } rep(i, 0, n + 1) if (a[i]) maxn++; cout << minn << " " << maxn << endl; return 0; }