Submission #547617

#	Time	Username	Problem	Language	Result	Execution time	Memory
547617		Soul234	Zoltan (COCI16_zoltan)	C++14	140 / 140	105 ms	14784 KiB

zoltan

#include<bits/stdc++.h>
using namespace std;

void DBG() { cerr << "]\n"; }
template<class H, class... T> void DBG(H h, T... t) {
    cerr << h; if(sizeof...(t)) cerr << ", ";
    DBG(t...);
}
#ifdef LOCAL
#define dbg(...) cerr << "[" << #__VA_ARGS__ << "]: [", DBG(__VA_ARGS__)
#else
#define dbg(...) 0
#endif // LOCAL

#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 each(e,a) for(auto &e : (a))
#define sz(v) (int)(v).size()
#define all(v) (v).begin(),(v).end()
#define rall(v) (v).rbegin(),(v).rend()
#define pb push_back
#define tcT template<class T
#define nl "\n"

using ll = long long;
using vi = vector<int>;
using pi = pair<int,int>;
using str = string;
tcT> using V = vector<T>;
tcT> using pqg = priority_queue<T,vector<T>,greater<T>>;

void setIO(string NAME = "") {
    cin.tie(0)->sync_with_stdio(0);
    if(sz(NAME)) {
        freopen((NAME + ".inp").c_str(),"r",stdin);
        freopen((NAME + ".out").c_str(),"w",stdout);
    }
}

#define f first
#define s second

const int MOD = 1e9 + 7;

int add(int a, int b) {
    if((a += b) >= MOD) a-=MOD;
    return a;
}

int mul(int a, int b) {
    return 1LL*a*b%MOD;
}

const int MX = 4e5+5;
V<pi> ft1(MX, {0,0}), ft2(MX, {0,0});
int N, A[MX], pw2[MX]; vi compr;
pi Dec[MX], Inc[MX];

pi comb(const pi&a, const pi&b) {
    if(a.f == b.f) return {a.f, add(a.s, b.s)};
    return max(a, b);
}

pi query1(int p) {
    pi res = {0,0};
    for(p += 5; p; p -= p&-p) res = comb(res, ft1[p]);
    return res;
}

void upd1(int p, pi val) {
    for(p+=5; p<MX; p += p&-p) ft1[p] = comb(ft1[p], val);
}

pi query2(int p) {
    pi res = {0,0};
    for(p += 5; p<MX; p += p&-p) res = comb(res, ft2[p]);
    return res;
}

void upd2(int p, pi val) {
    for(p+=5; p; p -= p&-p) ft2[p] = comb(ft2[p], val);
}

void solve() {
    pw2[0] = 1;
    FOR(i,1,MX) pw2[i] = mul(pw2[i-1], 2);
    cin>>N;
    F0R(i,N) {
        cin>>A[i];
        compr.pb(A[i]);
    }
    sort(all(compr)); compr.erase(unique(all(compr)), compr.end());
    F0R(i,N) {
        A[i] = lower_bound(all(compr), A[i]) - begin(compr) + 1;
    }
    R0F(i,N) {
        pi tmp = query1(A[i]-1);
        if(tmp.f == 0) {
            Dec[i] = {0, 1};
            tmp = {1,1};
        }
        else {
            Dec[i] = tmp;
            tmp.f++;
        }
        upd1(A[i], tmp);
    }
    R0F(i,N) {
        pi tmp = query2(A[i]+1);
        if(tmp.f == 0) {
            Inc[i] = {0, 1};
            tmp = {1,1};
        }
        else {
            Inc[i] = tmp;
            tmp.f++;
        }
        upd2(A[i], tmp);
    }
    pi ans = {0,0};
    //dbg(Dec[0].f, Dec[0].s, Inc[0].f, Inc[0].s);
    F0R(i,N) {
        ans = comb(ans, {Inc[i].f + Dec[i].f + 1, mul(Inc[i].s, Dec[i].s) });
    }
    ans.s = mul(ans.s, pw2[N-ans.f]);
    cout << ans.f << " " << ans.s << nl;
}

int main() {
    setIO();

    int t=1;
    //cin>>t;
    while(t-->0) {
        solve();
    }

    return 0;
}

Compilation message (stderr)

zoltan.cpp: In function 'void setIO(std::string)':
zoltan.cpp:37:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   37 |         freopen((NAME + ".inp").c_str(),"r",stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
zoltan.cpp:38:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   38 |         freopen((NAME + ".out").c_str(),"w",stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 140 / 140