Submission #799261

#	Time	Username	Problem	Language	Result	Execution time	Memory
799261		alittlemiddle	Game (IOI13_game)	C++14	100 / 100	3737 ms	56396 KiB

game

#include "game.h"
#include<bits/stdc++.h>
#define el '\n'
#define fi first
#define sc second
#define pii pair<int, int>
#define all(v) v.begin(), v.end()
using namespace std;
using ll=long long;
int m, n;
const int N = 5e6;
ll gcd(ll a, ll b)
{
    if (!b) return a;
    else return gcd(b, a % b);
}
ll ss[N];
int L[N], R[N], root[N], lazy[N];
int cur = 1;
void down(int id, int l, int r)
{
    int mid=(l+r)>>1;
    if(lazy[id]<=mid)
    {
        L[id] = ++cur;
        ss[L[id]] = ss[id];
        lazy[L[id]] = lazy[id];
    }
    else
    {
        R[id] = ++cur;
        ss[R[id]] = ss[id];
        lazy[R[id]] = lazy[id];
    }
    lazy[id] = 0;
}
void update1(int id, int l, int r, int pos, ll val)
{
    if(l==r)
    {
        ss[id]=val;
        return;
    }
    if(lazy[id])
    {
        if(lazy[id] == pos) ss[id] = val;
        else down(id, l, r);
    }
    int mid = (l+r)>>1;
    if(pos <= mid)
    {
        if(!L[id])
        {
            L[id] = ++cur;
            ss[L[id]] = val;
            lazy[L[id]] = pos;
        }
        else update1(L[id], l, mid, pos, val);
    }
    else
    {
        if(!R[id])
        {
            R[id] = ++cur;
            ss[R[id]] = val;
            lazy[R[id]] = pos;
        }
        else update1(R[id], mid + 1, r, pos, val);
    }
    ll s1 = 0, s2 = 0;
    if(L[id]) s1 = ss[L[id]];
    if(R[id]) s2 = ss[R[id]];
    ss[id] = gcd(s1, s2);
}

ll get1(int id, int l, int r, int a, int b)
{
    if(a > r || l > b) return 0;
    if(a <= l && r <= b) return ss[id];
    if(lazy[id])
    {
        if(a <= lazy[id] && lazy[id] <= b) return ss[id];
        else return 0;
    }
    int mid=(l+r)>>1;
    ll s1 = 0, s2 = 0;
    if(L[id]) s1 = get1(L[id], l, mid, a, b);
    if(R[id]) s2 = get1(R[id], mid + 1, r, a, b);
    return gcd(s1, s2);
}

void update2(int id, int l, int r, int i, int x, ll val)
{
    if(l == r)
    {
        if(!root[id]) root[id] = ++cur;
        update1(root[id], 1, n, x, val);
    }
    else
    {
        int mid = (l + r) >> 1;
        if(i <= mid)
        {
            if(!L[id]) L[id] = ++cur;
            update2(L[id], l, mid, i, x, val);
        }
        else
        {
            if(!R[id]) R[id] = ++cur;
            update2(R[id], mid + 1, r, i, x, val);
        }
        ll s1 = 0, s2 = 0;
        if(L[id]) s1 = get1(root[L[id]], 1, n, x, x);
        if(R[id]) s2 = get1(root[R[id]], 1, n, x, x);
        ll s3 = gcd(s1, s2);
        if(!root[id]) root[id] = ++cur;
        update1(root[id], 1, n, x, s3);
    }
}
ll get2(int id, int l, int r, int a, int b, int u, int v)
{
    if(a > r || l > b) return 0;
    else if(a <= l && r <= b)
    {
        if(root[id]) return get1(root[id], 1, n, u, v);
        else return 0;
    }
    int mid = (l + r) >> 1;
    ll s1 = 0, s2 = 0;
    if(L[id]) s1 = get2(L[id], l, mid, a, b, u, v);
    if(R[id]) s2 = get2(R[id], mid + 1, r, a, b, u, v);
    return gcd(s1, s2);
}
void init(int R, int C)
{
    m=R;
    n=C;
}
void update(int P, int Q, ll K)
{
    update2(1, 1, m, P+1, Q+1, K);
}

ll calculate(int P, int Q, int U, int V)
{
    return get2(1, 1, m, P+1, U+1, Q+1, V+1);
}

• Subtask 1: 10 / 10
• Subtask 2: 27 / 27
• Subtask 3: 26 / 26
• Subtask 4: 17 / 17
• Subtask 5: 20 / 20