Submission #331363

#TimeUsernameProblemLanguageResultExecution timeMemory
331363aloo123Pilot (NOI19_pilot)C++17
100 / 100
942 ms113072 KiB
#include <bits/stdc++.h>

using namespace std;
 
using ll = long long;
 
using pl = pair<ll,ll>;
 
using vl = vector<ll>;
 
#define mp make_pair
#define f first
#define s second
 
// vectors
#define sz(x) (int)(x).size()
#define all(x) begin(x), end(x)
#define rall(x) (x).rbegin(), (x).rend() 
#define sor(x) sort(all(x)) 
#define rsz resize
#define ins insert 
#define ft front() 
#define bk back()
#define pf push_front 
#define pb push_back
#define eb emplace_back 
#define lb lower_bound 
#define ub upper_bound 
 
// loops
#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)
 
// const int MOD = 1e9+7; // 998244353;
// const int MX = 2e5+5;
// const ll INF = 1e18; // not too close to LLONG_MAX
// const ld PI = acos((ld)-1);
// mt19937 rng((uint32_t)chrono::steady_clock::now().time_since_epoch().count()); 
 
// // helper funcs
// constexpr int pct(int x) { return __builtin_popcount(x); } // # of bits set
// constexpr int bits(int x) { return 31-__builtin_clz(x); } // floor(log2(x)) 
// ll cdiv(ll a, ll b) { return a/b+((a^b)>0&&a%b); } // divide a by b rounded up
// ll fdiv(ll a, ll b) { return a/b-((a^b)<0&&a%b); } // divide a by b rounded down
 
// tcT> bool ckmin(T& a, const T& b) {
// 	return b < a ? a = b, 1 : 0; } // set a = min(a,b)
// tcT> bool ckmax(T& a, const T& b) {
// 	return a < b ? a = b, 1 : 0; }
 
// #define tcTU tcT, class U
// tcTU> T fstTrue(T lo, T hi, U f) {
// 	hi ++; assert(lo <= hi); // assuming f is increasing
// 	while (lo < hi) { // find first index such that f is true 
// 		T mid = lo+(hi-lo)/2;
// 		f(mid) ? hi = mid : lo = mid+1; 
// 	} 
// 	return lo;
// }
// tcTU> T lstTrue(T lo, T hi, U f) {
// 	lo --; assert(lo <= hi); // assuming f is decreasing
// 	while (lo < hi) { // find first index such that f is true 
// 		T mid = lo+(hi-lo+1)/2;
// 		f(mid) ? lo = mid : hi = mid-1;
// 	} 
// 	return lo;
// }
// tcT> void remDup(vector<T>& v) { // sort and remove duplicates
// 	sort(all(v)); v.erase(unique(all(v)),end(v)); }
// tcTU> void erase(T& t, const U& u) { // don't erase
// 	auto it = t.find(u); assert(it != end(t));
// 	t.erase(u); } // element that doesn't exist from (multi)set
 
// // INPUT
// #define tcTUU tcT, class ...U
// tcT> void re(complex<T>& c);
// tcTU> void re(pair<T,U>& p);
// tcT> void re(vector<T>& v);
// tcT, size_t SZ> void re(AR<T,SZ>& a);
 
// tcT> void re(T& x) { cin >> x; }
// void re(db& d) { str t; re(t); d = stod(t); }
// void re(ld& d) { str t; re(t); d = stold(t); }
// tcTUU> void re(T& t, U&... u) { re(t); re(u...); }
 
// tcT> void re(complex<T>& c) { T a,b; re(a,b); c = {a,b}; }
// tcTU> void re(pair<T,U>& p) { re(p.f,p.s); }
// tcT> void re(vector<T>& x) { trav(a,x) re(a); }
// tcT, size_t SZ> void re(AR<T,SZ>& x) { trav(a,x) re(a); }
 
// // TO_STRING
// #define ts to_string
// str ts(char c) { return str(1,c); }
// str ts(const char* s) { return (str)s; }
// str ts(str s) { return s; }
// str ts(bool b) { 
// 	#ifdef LOCAL
// 		return b ? "true" : "false"; 
// 	#else 
// 		return ts((int)b);
// 	#endif
// }
// tcT> str ts(complex<T> c) { 
// 	stringstream ss; ss << c; return ss.str(); }
// str ts(vector<bool> v) {
// 	str res = "{"; F0R(i,sz(v)) res += char('0'+v[i]);
// 	res += "}"; return res; }
// template<size_t SZ> str ts(bitset<SZ> b) {
// 	str res = ""; F0R(i,SZ) res += char('0'+b[i]);
// 	return res; }
// tcTU> str ts(pair<T,U> p);
// tcT> str ts(T v) { // containers with begin(), end()
// 	#ifdef LOCAL
// 		bool fst = 1; str res = "{";
// 		for (const auto& x: v) {
// 			if (!fst) res += ", ";
// 			fst = 0; res += ts(x);
// 		}
// 		res += "}"; return res;
// 	#else
// 		bool fst = 1; str res = "";
// 		for (const auto& x: v) {
// 			if (!fst) res += " ";
// 			fst = 0; res += ts(x);
// 		}
// 		return res;
 
// 	#endif
// }
// tcTU> str ts(pair<T,U> p) {
// 	#ifdef LOCAL
// 		return "("+ts(p.f)+", "+ts(p.s)+")"; 
// 	#else
// 		return ts(p.f)+" "+ts(p.s);
// 	#endif
// }
 
// // OUTPUT
// tcT> void pr(T x) { cout << ts(x); }
// tcTUU> void pr(const T& t, const U&... u) { 
// 	pr(t); pr(u...); }
// void ps() { pr("\n"); } // print w/ spaces
// tcTUU> void ps(const T& t, const U&... u) { 
// 	pr(t); if (sizeof...(u)) pr(" "); ps(u...); }
 
// // DEBUG
// void DBG() { cerr << "]" << endl; }
// tcTUU> void DBG(const T& t, const U&... u) {
// 	cerr << ts(t); if (sizeof...(u)) cerr << ", ";
// 	DBG(u...); }
// #ifdef LOCAL // compile with -DLOCAL, chk -> fake assert
// 	#define dbg(...) cerr << "Line(" << __LINE__ << ") -> [" << #__VA_ARGS__ << "]: [", DBG(__VA_ARGS__)
// 	#define chk(...) if (!(__VA_ARGS__)) cerr << "Line(" << __LINE__ << ") -> function(" \
// 		 << __FUNCTION__  << ") -> CHK FAILED: (" << #__VA_ARGS__ << ")" << "\n", exit(0);
// #else
// 	#define dbg(...) 0
// 	#define chk(...) 0
// #endif
 
// // FILE I/O
// void setIn(str s) { freopen(s.c_str(),"r",stdin); }
// void setOut(str s) { freopen(s.c_str(),"w",stdout); }
void unsyncIO() { cin.tie(0)->sync_with_stdio(0);cout.tie(0); }
// void setIO(str s = "") {
// 	unsyncIO();
// 	// cin.exceptions(cin.failbit); 
// 	// throws exception when do smth illegal
// 	// ex. try to read letter into int
// 	if (sz(s)) { setIn(s+".in"), setOut(s+".out"); } // for USACO
// }
 
#define int ll
const int xd[4] = {1,0,-1,0}, yd[4] = {0,1,0,-1}; // for every grid problem!!
const int N = 1e6+5;
int h[N],ans[N];
pl y[N];
vl what[N];
int cur = 0;
bool is_part[N];
int nc2(int n){
	int x=n;
	x *= (n+1);
	x>>=1ll;
	return x;
}
struct dsu{
	int sz[N];
	int par[N];
	void init_node(int u){
		sz[u] = 1;
		par[u] = u;
		cur++;
		is_part[u]=true;
	}
	int find_par(int u){
		if(u==par[u])return u;
		return par[u]=find_par(par[u]);
	}
	void unite(int u,int v){
		u = find_par(u),v= find_par(v);
		if(u == v)return;
		if(sz[u]>sz[v])swap(u,v);
		cur -= nc2(sz[u]);
		cur -= nc2(sz[v]);
		sz[v]+=sz[u];
		cur += nc2(sz[v]);		
		par[u] =v;
		sz[u]=0;

	}
};
dsu g;
void solve(){
	int n,q;
	cin>>n>>q;
	FOR(i,1,n+1){
		cin>>h[i];
		what[h[i]].pb(i);
	}
	FOR(i,1,q+1){
		cin>>y[i].f;
		y[i].s = i;
	}
	sort(y+1,y+q+1);
	FOR(i,1,q+1){
		int x = y[i].f;
		FOR(j,y[i-1].f+1,x+1){
			if(what[j].empty()) continue;
			trav(id,what[j]){
				g.init_node(id);
				if(id != n && is_part[id+1]) g.unite(id,id+1);
				if(id != 1 && is_part[id-1]) g.unite(id-1,id);
			}
		}		
		ans[y[i].s] = cur;
	}
	FOR(i,1,q+1){
		cout<<ans[i]<<"\n";
	}

}
signed main() {
	cin.tie(0)->sync_with_stdio(0);cout.tie(0); 
	// setIO();	
	// you should actually read the stuff at the bottom
	int t=1;
	// re(t);
	while(t--){
		solve();
	}
}
 
/* stuff you should look for
	* read the probem 3 more times in case of WA :)
	* int overflow, array bounds
	* special cases (n=1?)
	* do smth instead of nothing and stay organized
	* WRITE STUFF DOWN
	* DON'T GET STUCK ON ONE APPROACH
*/

Compilation message (stderr)

pilot.cpp:156:1: warning: multi-line comment [-Wcomment]
  156 | //  #define chk(...) if (!(__VA_ARGS__)) cerr << "Line(" << __LINE__ << ") -> function(" \
      | ^
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