Submission #143671

#	Time	Username	Problem	Language	Result	Execution time	Memory
143671		Benq	Coins (LMIO19_monetos)	C++14	85.19 / 100	1499 ms	73848 KiB

monetos

#pragma GCC optimize ("O3")
#pragma GCC target ("sse4")

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

using namespace std;
using namespace __gnu_pbds;
using namespace __gnu_cxx;
 
typedef long long ll;
typedef long double ld;
typedef complex<ld> cd;

typedef pair<int, int> pi;
typedef pair<ll,ll> pl;
typedef pair<ld,ld> pd;

typedef vector<int> vi;
typedef vector<ld> vd;
typedef vector<ll> vl;
typedef vector<pi> vpi;
typedef vector<pl> vpl;
typedef vector<cd> vcd;

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

#define FOR(i, a, b) for (int i = (a); i < (b); i++)
#define F0R(i, a) for (int i = 0; i < (a); i++)
#define FORd(i,a,b) for (int i = (b)-1; i >= (a); i--)
#define F0Rd(i,a) for (int i = (a)-1; i >= 0; i--)
#define trav(a, x) for (auto& a : x)

#define mp make_pair
#define pb push_back
#define f first
#define s second
#define lb lower_bound
#define ub upper_bound

#define sz(x) (int)x.size()
#define all(x) begin(x), end(x)
#define rsz resize

const int MOD = 1000000007; // 998244353
const ll INF = 1e18;
const int MX = 305;
const ld PI = 4*atan((ld)1);

template<class T> void ckmin(T &a, T b) { a = min(a, b); }
template<class T> void ckmax(T &a, T b) { a = max(a, b); }

namespace input {
    template<class T> void re(complex<T>& x);
    template<class T1, class T2> void re(pair<T1,T2>& p);
    template<class T> void re(vector<T>& a);
    template<class T, size_t SZ> void re(array<T,SZ>& a);

    template<class T> void re(T& x) { cin >> x; }
    void re(double& x) { string t; re(t); x = stod(t); }
    void re(ld& x) { string t; re(t); x = stold(t); }
    template<class Arg, class... Args> void re(Arg& first, Args&... rest) { 
        re(first); re(rest...); 
    }

    template<class T> void re(complex<T>& x) { T a,b; re(a,b); x = cd(a,b); }
    template<class T1, class T2> void re(pair<T1,T2>& p) { re(p.f,p.s); }
    template<class T> void re(vector<T>& a) { F0R(i,sz(a)) re(a[i]); }
    template<class T, size_t SZ> void re(array<T,SZ>& a) { F0R(i,SZ) re(a[i]); }
}

using namespace input;

namespace output {
    template<class T1, class T2> void pr(const pair<T1,T2>& x);
    template<class T, size_t SZ> void pr(const array<T,SZ>& x);
    template<class T> void pr(const vector<T>& x);
    template<class T> void pr(const set<T>& x);
    template<class T1, class T2> void pr(const map<T1,T2>& x);

    template<class T> void pr(const T& x) { cout << x; }
    template<class Arg, class... Args> void pr(const Arg& first, const Args&... rest) { 
        pr(first); pr(rest...); 
    }

    template<class T1, class T2> void pr(const pair<T1,T2>& x) { 
        pr("{",x.f,", ",x.s,"}"); 
    }
    template<class T> void prContain(const T& x) {
        pr("{");
        bool fst = 1; for (const auto& a: x) pr(!fst?", ":"",a), fst = 0; // const needed for vector<bool>
        pr("}");
    }
    template<class T, size_t SZ> void pr(const array<T,SZ>& x) { prContain(x); }
    template<class T> void pr(const vector<T>& x) { prContain(x); }
    template<class T> void pr(const set<T>& x) { prContain(x); }
    template<class T1, class T2> void pr(const map<T1,T2>& x) { prContain(x); }
    
    void ps() { pr("\n"); }
    template<class Arg> void ps(const Arg& first) { 
        pr(first); ps(); // no space at end of line
    }
    template<class Arg, class... Args> void ps(const Arg& first, const Args&... rest) { 
        pr(first," "); ps(rest...); // print w/ spaces
    }
}

using namespace output;

namespace io {
    void setIn(string s) { freopen(s.c_str(),"r",stdin); }
    void setOut(string s) { freopen(s.c_str(),"w",stdout); }
    void setIO(string s = "") {
        ios_base::sync_with_stdio(0); cin.tie(0); // fast I/O
        if (sz(s)) { setIn(s+".in"), setOut(s+".out"); } // for USACO
    }
}

using namespace io;

template<class T> T invGeneral(T a, T b) {
    a %= b; if (a == 0) return b == 1 ? 0 : -1;
    T x = invGeneral(b,a); 
    return x == -1 ? -1 : ((1-(ll)b*x)/a+b)%b;
}

template<class T> struct modular {
    T val; 
    explicit operator T() const { return val; }
    modular() { val = 0; }
    modular(const ll& v) { 
        val = (-MOD <= v && v <= MOD) ? v : v % MOD;
        if (val < 0) val += MOD;
    }
    
    // friend ostream& operator<<(ostream& os, const modular& a) { return os << a.val; }
    friend void pr(const modular& a) { pr(a.val); }
    friend void re(modular& a) { ll x; re(x); a = modular(x); }
   
    friend bool operator==(const modular& a, const modular& b) { return a.val == b.val; }
    friend bool operator!=(const modular& a, const modular& b) { return !(a == b); }
    friend bool operator<(const modular& a, const modular& b) { return a.val < b.val; }

    modular operator-() const { return modular(-val); }
    modular& operator+=(const modular& m) { if ((val += m.val) >= MOD) val -= MOD; return *this; }
    modular& operator-=(const modular& m) { if ((val -= m.val) < 0) val += MOD; return *this; }
    modular& operator*=(const modular& m) { val = (ll)val*m.val%MOD; return *this; }
    friend modular pow(modular a, ll p) {
        modular ans = 1; for (; p; p /= 2, a *= a) if (p&1) ans *= a;
        return ans;
    }
    friend modular inv(const modular& a) { 
        auto i = invGeneral(a.val,MOD); assert(i != -1);
        return i;
    } // equivalent to return exp(b,MOD-2) if MOD is prime
    modular& operator/=(const modular& m) { return (*this) *= inv(m); }
    
    friend modular operator+(modular a, const modular& b) { return a += b; }
    friend modular operator-(modular a, const modular& b) { return a -= b; }
    friend modular operator*(modular a, const modular& b) { return a *= b; }
    
    friend modular operator/(modular a, const modular& b) { return a /= b; }
};

typedef modular<int> mi;
typedef pair<mi,mi> pmi;
typedef vector<mi> vmi;
typedef vector<pmi> vpmi;

mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());

int T,N,K1,K2,g[MX][MX],res[MX][MX];
vi dp[MX][MX]; // i rows done, last row has >= j, k total

void check(vi& a, const vi& b) {
	while (sz(a) < sz(b)) a.pb(MOD);
	F0R(i,sz(b)) ckmin(a[i],b[i]);
}

vi shift(vi a, int b, int c) {
	trav(t,a) t += c;
	a.insert(a.begin(),b,MOD);
	if (sz(a) > N*N/2) a.rsz(N*N/2+1);
	return a;
}

void exact() {
	dp[0][N] = {0};
	F0Rd(j,N) check(dp[0][j],dp[0][j+1]);
    F0R(i,N) {
    	int dif = 0;
    	F0R(j,N+1) {
    		dp[i+1][j] = shift(dp[i][j],j,dif);
    		if (j < N) dif += g[i][j];
    	}
    	F0Rd(j,N) check(dp[i+1][j],dp[i+1][j+1]);
    }
    int j = 0, k = N*N/2;
    F0Rd(i,N) {
    	while (k < sz(dp[i+1][j+1]) && dp[i+1][j+1][k] == dp[i+1][j][k]) j ++;
    	k -= j;
    	FOR(z,j,N) res[i][z] = 1;
    }
}

const int BAD = 120;

double val (pi t) {
	return double(t.s)/t.f;
}

int tot = 0, z = 0, maxBound;
pi exists[1000];

void ins(pi t) {
	int q = t.f/maxBound; ckmax(z,q); 
	if (exists[q].f != MOD) return;
	exists[q] = t; tot ++;
}

vpi compress(vpi v) { 
	if (N <= 50 || sz(v) <= BAD) return v;
	// F0R(i,sz(v)-1) assert(v[i] < v[i+1]);
	tot = 0; F0R(i,4*BAD/2+1) exists[i] = {MOD,MOD};
	pi mx = v.back(); v.pop_back(); 
	maxBound = mx.f/(4*BAD/2)+1;
	ins(mx); assert(tot == 1);
	sort(all(v),[](pi a, pi b) { return val(a) < val(b); });
	trav(t,v) {
		ins(t);
		if (tot == BAD) break;
	}
	vpi res;
	F0R(i,4*BAD/2+1) if (exists[i].f != MOD) res.pb(exists[i]);
	// F0R(i,sz(res)-1) assert(res[i].f < res[i+1].f);
	/*if (res.back() != mx) {
		// ins(mx);
		ps("??",sz(v),sz(res),res.back(),mx,mx.f/(N/2),exists[2]);
		exit(0);
	}*/
	return res;
	/*vpi V; int mn = MOD;
	F0Rd(i,sz(v)) {
		if (v[i].s >= mn) continue;
		mn = v[i].s; V.pb(v[i]);
	}
	// those with the min value of v[i].s/v[i].f
	reverse(all(V));
	
	vector<bool> ok(sz(V)); ok[0] = ok[sz(V)-1] = 1;
	vi select(sz(V)); F0R(i,sz(select)) select[i] = i;
	random_shuffle(all(select));
	F0R(i,min(100,sz(select))) ok[select[i]] = 1;
	vpi res;
	F0R(i,sz(V)) if (ok[i]) res.pb(V[i]);
	return res;*/
}

void check(vpi& a, vpi b) {
	vpi c;
	int ind = 0;
	F0R(i,sz(a)) {
		while (ind < sz(b) && b[ind].f < a[i].f) c.pb(b[ind++]);
		if (ind < sz(b) && b[ind].f == a[i].f) ckmin(a[i].s,b[ind++].s);
		c.pb(a[i]);
	}
	while (ind < sz(b)) c.pb(b[ind++]);
	a = compress(c); 
}

vpi shift(vpi a, int b, int c) {
	trav(t,a) t.f += b, t.s += c;
	while (sz(a) && a.back().f > N*N/2) a.pop_back();
	return a;
}

int get(vpi& a, int b) {
	auto it = lb(all(a),mp(b,-MOD));
	if (it == end(a) || it->f != b) return MOD;
	return it->s;
}

vpi DP[MX][MX];

void approx() {
	DP[0][N] = {{0,0}};
	F0Rd(j,N) check(DP[0][j],DP[0][j+1]);
    F0R(i,N) {
    	int dif = 0;
    	F0R(j,N+1) {
    		DP[i+1][j] = shift(DP[i][j],j,dif);
    		if (j < N) dif += g[i][j];
    	}
    	F0Rd(j,N) check(DP[i+1][j],DP[i+1][j+1]);
    }
    // exit(0);
    // ps("HUH",DP[N][0].back());
    // F0R(i,N+1) if (sz(DP[N][i])) ps(i,DP[N][i].back());
    // ps(z);
    if (get(DP[N][0],N*N/2) == MOD) {
    	ps("ANS DOES NOT EXIST",DP[N][0].back());
    	exit(0);
    }
    int j = 0, k = N*N/2;
    F0Rd(i,N) {
    	while (get(DP[i+1][j+1],k) == get(DP[i+1][j],k)) j ++;
    	k -= j;
    	FOR(z,j,N) res[i][z] = 1;
    }
}

int main() {
    setIO(); re(T,N,K1,K2);
    F0R(i,N) F0R(j,N) {
    	re(g[i][j]);
    	// g[i][j] = rand()&1;
    }
    approx();
    F0R(i,N) {
    	F0R(j,N) pr(res[i][j],' ');
    	ps();
    }
}

/* stuff you should look for
    * int overflow, array bounds
    * special cases (n=1?), set tle
    * do smth instead of nothing and stay organized
*/

Compilation message (stderr)

monetos.cpp: In function 'void io::setIn(std::__cxx11::string)':
monetos.cpp:113:35: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
     void setIn(string s) { freopen(s.c_str(),"r",stdin); }
                            ~~~~~~~^~~~~~~~~~~~~~~~~~~~~
monetos.cpp: In function 'void io::setOut(std::__cxx11::string)':
monetos.cpp:114:36: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
     void setOut(string s) { freopen(s.c_str(),"w",stdout); }
                             ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 85.19187097222 / 100