Submission #281793

#	Time	Username	Problem	Language	Result	Execution time	Memory
281793		Kastanda	Game (IOI13_game)	C++14	80 / 100	3305 ms	50604 KiB

game

// M
#include<bits/stdc++.h>
#include "game.h"
#define lc (id << 1)
#define rc (lc ^ 1)
#define md ((l + r) >> 1)
using namespace std;
typedef long long ll;
const int N = 22005, TF = 400, MXS = N * 4, NS = N * 15;
int n, m, k, segk;
map < pair < int , int > , ll > MP, TMp;
vector < pair < int , int > > V[N], VC[MXS];
vector < int > UX, VID[MXS];
ll G[NS * 2];
inline void ModifySeg(int i, ll val)
{
        G[i += NS] = val;
        for (; i; i >>= 1)
                G[i >> 1] = __gcd(G[i], G[i ^ 1]);
}
inline ll GetSeg(int l, int r)
{
        ll g = 0;
        for (l += NS, r += NS; l < r; l >>= 1, r >>= 1)
        {
                if (l & 1) g = __gcd(g, G[l ++]);
                if (r & 1) g = __gcd(g, G[-- r]);
        }
        return g;
}
void Build(int id = 1, int l = 0, int r = k)
{
        VC[id].clear();
        VID[id].clear();
        if (r - l < 2)
                sort(V[l].begin(), V[l].end()), VC[id] = V[l];
        else
        {
                Build(lc, l, md);
                Build(rc, md, r);
                merge(VC[lc].begin(), VC[lc].end(), VC[rc].begin(), VC[rc].end(), back_inserter(VC[id]));
        }
        for (int i = 0; i < (int)VC[id].size(); i ++)
        {
                ModifySeg(segk, MP[make_pair(VC[id][i].second, VC[id][i].first)]);
                VID[id].push_back(segk ++);
        }
}
inline void Relax()
{
        segk = 0;
        memset(G, 0, sizeof(G));
        UX.clear();
        for (auto X : TMp)
                MP[X.first] = X.second;
        TMp.clear();
 
        for (auto e : MP)
                UX.push_back(e.first.first);
        UX.resize(unique(UX.begin(), UX.end()) - UX.begin());
        k = (int)UX.size();
        for (int i = 0; i <= k; i ++)
                V[i].clear();
 
        int ptr = 0;
        for (auto e : MP)
        {
                while (UX[ptr] < e.first.first)
                        ptr ++;
                V[ptr].push_back(make_pair(e.first.second, e.first.first));
        }
        Build();
        assert(segk < NS);
}
void Update(int i, int c, ll val, int id = 1, int l = 0, int r = k)
{
        int lb = (int)(lower_bound(VC[id].begin(), VC[id].end(), make_pair(c, UX[i])) - VC[id].begin());
        ModifySeg(VID[id][lb], val);
        if (r - l < 2)
                return ;
        if (i < md)
                Update(i, c, val, lc, l, md);
        else
                Update(i, c, val, rc, md, r);
}
void init(int _n, int _m)
{
        n = _n; m = _m;
        Relax();
}
void update(int r, int c, ll val)
{
        if (MP.count({r, c}))
        {
                r = lower_bound(UX.begin(), UX.end(), r) - UX.begin();
                Update(r, c, val);
                MP[make_pair(UX[r], c)] = val;
        }
        else
        {
                TMp[make_pair(r, c)] = val;
                if ((int)TMp.size() >= TF)
                        Relax();
        }
}
ll Get(int le, int ri, int lq, int rq, int id = 1, int l = 0, int r = k)
{
        if (ri <= l || r <= le)
                return 0LL;
        if (le <= l && r <= ri)
        {
                int lb = (int)(lower_bound(VC[id].begin(), VC[id].end(), make_pair(lq, -1)) - VC[id].begin());
                int ub = (int)(lower_bound(VC[id].begin(), VC[id].end(), make_pair(rq, -1)) - VC[id].begin());
                if (lb < ub)
                        return GetSeg(VID[id][lb], VID[id][ub - 1] + 1);
          		return 0LL;
        }
        return __gcd(Get(le, ri, lq, rq, lc, l, md), Get(le, ri, lq, rq, rc, md, r));
}
inline ll Query(int a, int b, int c, int d)
{
        c ++; d ++;
        a = lower_bound(UX.begin(), UX.end(), a) - UX.begin();
        c = lower_bound(UX.begin(), UX.end(), c) - UX.begin();
        return Get(a, c, b, d);
}
ll calculate(int a, int b, int c, int d)
{
        ll g = Query(a, b, c, d);
        for (auto e : TMp)
                if (e.first.first >= a && e.first.first <= c && e.first.second >= b && e.first.second <= d)
                        g = __gcd(g, e.second);
        return g;
}

Compilation message (stderr)

grader.c: In function 'int main()':
grader.c:18:6: warning: variable 'res' set but not used [-Wunused-but-set-variable]
   18 |  int res;
      |      ^~~
game.cpp: In function 'll Get(int, int, int, int, int, int, int)':
game.cpp:114:17: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
  114 |                 if (lb < ub)
      |                 ^~
game.cpp:116:13: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'if'
  116 |             return 0LL;
      |             ^~~~~~

• Subtask 1: 10 / 10
• Subtask 2: 27 / 27
• Subtask 3: 26 / 26
• Subtask 4: 17 / 17
• Subtask 5: 0 / 20