Submission #332869

#	Time	Username	Problem	Language	Result	Execution time	Memory
332869		jc713	Happiness (Balkan15_HAPPINESS)	C++17	100 / 100	1999 ms	256328 KiB

happiness

#include "happiness.h"
#include <ext/pb_ds/tree_policy.hpp>
#include <ext/pb_ds/assoc_container.hpp>
#include <bits/stdc++.h>

using namespace std;
using namespace __gnu_pbds;
template <class T> using Tree = tree<T, null_type, less<T>,
    rb_tree_tag, tree_order_statistics_node_update>;

using ll = long long;
using ull = unsigned long long;
using ld = long double;
using db = double;
using str = string; // yay python!

using pi = pair<int,int>;
using pl = pair<ll,ll>;
using pd = pair<db,db>;

using vi = vector<int>;
using vb = vector<bool>;
using vl = vector<ll>;
using vd = vector<db>;
using vs = vector<str>;
using vpi = vector<pi>;
using vpl = vector<pl>;
using vpd = vector<pd>;

#define tcT template<class T
// ^ 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>;

// pairs
#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 int IINF = 1e9;
const ld PI = acos((ld)-1);
const int xd[4] = {1,0,-1,0}, yd[4] = {0,1,0,-1}; // for every grid problem!!
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); }
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
}

struct custom_hash {
    static uint64_t splitmix64(uint64_t x) {
        // http://xorshift.di.unimi.it/splitmix64.c
        x += 0x9e3779b97f4a7c15;
        x = (x ^ (x >> 30)) * 0xbf58476d1ce4e5b9;
        x = (x ^ (x >> 27)) * 0x94d049bb133111eb;
        return x ^ (x >> 31);
    }

    size_t operator()(uint64_t x) const {
        static const uint64_t FIXED_RANDOM = chrono::steady_clock::now().time_since_epoch().count();
        return splitmix64(x + FIXED_RANDOM);
    }
};

/* stuff you should look for
    * 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
*/

const ll SZ = 1LL<<40;
template<class T> struct node {
	T val = 0; node<T>* c[2];
	node() { c[0] = c[1] = NULL; }
	void upd(ll ind, T v, ll L = 0, ll R = SZ-1) { // add v
		if (L == ind && R == ind) { val += v; return; }
		ll M = (L+R)/2;
		if (ind <= M) {
			if (!c[0]) c[0] = new node();
			c[0]->upd(ind,v,L,M);
		} else {
			if (!c[1]) c[1] = new node();
			c[1]->upd(ind,v,M+1,R);
		}
		val = 0; F0R(i,2) if (c[i]) val += c[i]->val;
	}
	T query(ll lo, ll hi, ll L = 0, ll R = SZ-1) { // query sum of segment
		if (hi < L || R < lo) return 0;
		if (lo <= L && R <= hi) return val;
		ll M = (L+R)/2; T res = 0;
		if (c[0]) res += c[0]->query(lo,hi,L,M);
		if (c[1]) res += c[1]->query(lo,hi,M+1,R);
		return res;
	}
};

/*#define NMAX 200000
#define QMAX 100000

static int N, Q;
static long long M;
static long long coins[NMAX], A[5];

int main()
{
	int i, d;
	long long max_code;

	scanf("%d%lld", &N, &M);
	for (i = 0; i < N; ++i) {
		scanf("%lld", &coins[i]);
	}
	if (init(N, M, coins))printf("1\n");
	else printf("0\n");
	scanf("%d", &Q);
	for (i = 0; i < Q; ++i) {
		int ck, c;
		scanf("%d%d", &ck, &c);
		for (int j = 0; j < c; j++) {
			scanf("%lld", &A[j]);
		}
		if (is_happy(ck, c, A))printf("1\n");
		else printf("0\n");
	}

	return 0;
}*/

ll SUM = 0;
node<ll> seg;

bool init(int coinsCount, ll maxCoinSize, ll coins[]) {
	F0R(a, coinsCount){
		SUM += coins[a];
		seg.upd(coins[a], coins[a]);
	}
	if(SUM == 0)
		return true;
	ll nxt = 1;
	ll prev = -1;
	while(nxt <= SUM){
		if(seg.query(0, nxt - 1) + 1 < nxt || prev == nxt)
			return false;
		prev = nxt;
		nxt = seg.query(0, nxt) + 1;
	}
	return true;
}
bool is_happy(int event, int coinsCount, ll coins[]) {
	if(event == -1){
		F0R(a, coinsCount){
		SUM -= coins[a];
		seg.upd(coins[a], -coins[a]);
	}
	if(SUM == 0)
		return true;
	ll nxt = 1;
	ll prev = -1;
	while(nxt <= SUM){
		if(prev == nxt || seg.query(0, nxt - 1) + 1 < nxt)
			return false;
		prev = nxt;
		nxt = seg.query(0, nxt) + 1;
	}
	return true;
	}
	else{
		F0R(a, coinsCount){
		SUM += coins[a];
		seg.upd(coins[a], coins[a]);
	}
	if(SUM == 0)
		return true;
	ll nxt = 1;
	ll prev = -1;
	while(nxt <= SUM){
		if(prev == nxt || seg.query(0, nxt - 1) + 1 < nxt)
			return false;
		prev = nxt;
		nxt = seg.query(0, nxt) + 1;
	}
	return true;
	}
}

Compilation message (stderr)

happiness.cpp: In function 'void setIn(str)':
happiness.cpp:191:28: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
  191 | void setIn(str s) { freopen(s.c_str(),"r",stdin); }
      |                     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~
happiness.cpp: In function 'void setOut(str)':
happiness.cpp:192:29: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
  192 | void setOut(str s) { freopen(s.c_str(),"w",stdout); }
      |                      ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
grader.cpp: In function 'int main()':
grader.cpp:16:12: warning: unused variable 'max_code' [-Wunused-variable]
   16 |  long long max_code;
      |            ^~~~~~~~

• Subtask 1: 10 / 10
• Subtask 2: 20 / 20
• Subtask 3: 30 / 30
• Subtask 4: 40 / 40