Submission #251742

#	Time	Username	Problem	Language	Result	Execution time	Memory
251742		ne4eHbKa	Relativnost (COCI15_relativnost)	C++17	140 / 140	3595 ms	13068 KiB

relativnost

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

//#pragma comment(linker, "/stack:200000000")
//#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")
//#pragma GCC optimize("Ofast,no-stack-protector,unroll-loops,fast-math,-O3")

#define fr(i, n) for(int i = 0; i < n; ++i)
#define fo(n) fr(i, n)

#define re return
#define ef else if
#define ifn(x) if(!(x))
#define _  << ' ' <<

#define ft first
#define sd second
#define ve vector
#define pb push_back
#define eb emplace_back

#define sz(x) int((x).size())
#define bnd(x) x.begin(), x.end()
#define clr(x, y) memset((x), (y), sizeof (x))

typedef long long ll;
typedef long double ld;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
typedef ve<int> vi;

inline ll time() {re chrono :: system_clock().now().time_since_epoch().count();}
mt19937 rnd(time());
mt19937_64 RND(time());

template<typename t> inline void umin(t &a, t b) {a = min(a, b);}
template<typename t> inline void umax(t &a, t b) {a = max(a, b);}

int md = 998244353;

inline int m_add(int&a, int b) {a += b; if(a < 0) a += md; if(a >= md) a -= md; re a;}
inline int m_sum(int a, int b) {a += b; if(a < 0) a += md; if(a >= md) a -= md; re a;}
inline int m_mul(int&a, int b) {re a = 1ll * a * b % md;}
inline int m_prod(int a, int b) {re 1ll * a * b % md;}

int m_bpow(ll A, ll b) {
    int a = A % md;
    ll ans = 1;
    for(ll p = 1ll << 63 - __builtin_clzll(b); p; p >>= 1) {
        (ans *= ans) %= md;
        if(p & b)
            (ans *= a) %= md;
    }
    re ans;
}

//const ld pi = arg(complex<ld>(-1, 0));
//const ld pi2 = pi + pi;
const int oo = 2e9;
const ll OO = 4e18;
//} </defines>
const int N = 1e5 + 5;
const short smd = 1e4 + 7;

int n, c, q;
int a[N], b[N];

struct tree {
    short *v;
    tree *l, *r;
    void merge(int ul, int ur, bool cl = false) {
        if(!cl) memset(v, 0, min(c, ul + ur) + 1 << 1);
        short *fi = l->v, *se;
        for(int i = 0; i <= min(ul, c); ++i, ++fi) {
            if(!*fi) continue;
            se = r->v;
            for(int j = 0; j <= min(ur, c); ++j, ++se) {
                if(!*se) continue;
                short &t = v[min(c, i + j)];
                t += *fi * *se % md;
                if(t >= smd) t -= smd;
            }
        }
    }
    tree(int tl = 0, int tr = n - 1) {
        v = (short*) calloc(min(c + 1, tr - tl + 2), 2);
        if(tl < tr) {
            int tm = tl + tr >> 1;
            l = new tree(tl, tm);
            r = new tree(tm + 1, tr);
            merge(tm - tl + 1, tr - tm, true);
        } else {
            v[0] = b[tl];
            v[1] = a[tl];
        }
    }
    void upd(int i, int tl = 0, int tr = n - 1) {
        if(tl == tr) {
            v[0] = b[tl];
            v[1] = a[tl];
            return;
        }
        int tm = tl + tr >> 1;
        i <= tm ? l->upd(i, tl, tm)
                : r->upd(i, tm + 1, tr);
        merge(tm - tl + 1, tr - tm);
    }
#ifdef _LOCAL
    ~tree() {
        free(v);
    }
#endif
};

void solve() {
    md = 1e4 + 7;
    cin >> n >> c;
    fo(n) cin >> a[i], a[i] %= md;
    fo(n) cin >> b[i], b[i] %= md;
    tree *t = new tree();
    cin >> q;
    while(q--) {
        int i, na, nb; cin >> i >> na >> nb;
        if(c > n) {
            cout << "0\n";
            continue;
        }
        na %= md, nb %= md, --i;
        a[i] = na, b[i] = nb;
        t->upd(i);
        cout << t->v[c] << '\n';
    }
}

int main() {
#ifdef _LOCAL
    freopen("in.txt", "r", stdin);
    int tests; cin >> tests;
    for(int test = 1; test <= tests; ++test) {
		cerr << "case #" << test << endl;
        solve();
        cerr << endl;
    }
#else
//    freopen("input.txt", "r", stdin); freopen("output.txt", "w", stdout);
    ios_base :: sync_with_stdio(0); cin.tie(0); cout.tie(0);
    solve();
#endif
    return 0;
}

Compilation message (stderr)

relativnost.cpp: In function 'int m_bpow(ll, ll)':
relativnost.cpp:50:26: warning: suggest parentheses around '-' inside '<<' [-Wparentheses]
     for(ll p = 1ll << 63 - __builtin_clzll(b); p; p >>= 1) {
                       ~~~^~~~~~~~~~~~~~~~~~~~
relativnost.cpp: In member function 'void tree::merge(int, int, bool)':
relativnost.cpp:73:46: warning: suggest parentheses around '+' inside '<<' [-Wparentheses]
         if(!cl) memset(v, 0, min(c, ul + ur) + 1 << 1);
                              ~~~~~~~~~~~~~~~~^~~
relativnost.cpp: In constructor 'tree::tree(int, int)':
relativnost.cpp:89:25: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
             int tm = tl + tr >> 1;
                      ~~~^~~~
relativnost.cpp: In member function 'void tree::upd(int, int, int)':
relativnost.cpp:104:21: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
         int tm = tl + tr >> 1;
                  ~~~^~~~

• Subtask 1: 140 / 140