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Cod sursa(job #703568)
#include <stdio.h>
#include <vector>
using namespace std;
#define MAXN 500005
#define MAXDIFNR 600020
#define MAXNR 30000
vector<int> poz[MAXDIFNR];
int n, k, nrInterv = 1, nrAuxInterv = 1, indice;
pair<int, int> intervale[MAXN];
vector<int> subinterv[MAXN];
pair<int, int> interv;
bool intervBun;
void dfs(int nod)
{
if(subinterv[nod].empty() || subinterv[nod].front() > nrAuxInterv)
{
interv.first = intervale[nod].first + 1;
interv.second = intervale[nod].second - 1;
intervBun = true;
nrInterv++;
subinterv[nod].push_back(nrInterv);
intervale[nrInterv] = pair<int, int> (interv.first - 1, indice);
nrInterv++;
subinterv[nod].push_back(nrInterv);
intervale[nrInterv] = pair<int, int> (indice, interv.second + 1);
return;
}
vector<int>::iterator it;
for(it = subinterv[nod].begin(); it != subinterv[nod].end(); it++)
{
if(intervale[*it].second > indice)
{
if(intervale[*it].second - intervale[*it].first > k)
dfs(*it);
else
return;
}
}
}
int nr[MAXN];
int main()
{
FILE *in = fopen("secventa.in", "r");
FILE *out = fopen("secventa.out", "w");
fscanf(in, "%i %i", &n, &k);
intervale[1] = pair<int, int>(0, n + 1);
int i, aux, j;
for(i = 1; i <= n; i++)
{
fscanf(in, "%i", &aux);
poz[aux + MAXNR].push_back(i);
}
vector<int>::iterator it;
pair<int, int> intervMax;
bool gasit, stored = 0;
int maxim, st, dr, piv;
vector<int> used[2];
used[0].push_back(0);
used[0].push_back(n + 1);
int i1, i2, n1, n2;
for(i = 0; i < MAXDIFNR; i++)
{
if(!poz[i].empty())
{
nrAuxInterv = nrInterv;
gasit = false;
for(it = poz[i].begin(); it != poz[i].end(); it++)
{
//binary search:::
st = 0;
dr = used[stored].size() - 1;
while(st < dr - 1)
{
piv = (st + dr) / 2;
if(used[stored][piv] < *it)
st = piv;
else
dr = piv;
}
if(maxim != i && used[stored][st + 1] - used[stored][st] > k)
{
intervMax.first = used[stored][st];
maxim = i;
}
/*intervBun = false;
indice = *it;
dfs(1);
if(intervBun == true && gasit == false)
{
gasit = true;
intervMax.first = interv.first;
intervMax.second = interv.second;
maxim = i;
}*/
}
used[1 - stored].clear();
i1 = i2 = 0;
n1 = used[stored].size();
n2 = poz[i].size();
//sorare prin interclasare:
while(i1 != n1 || i2 != n2)
{
if((i1 == n1 || poz[i][i2] < used[stored][i1]) && i2 != n2)
{
used[1 - stored].push_back(poz[i][i2]);
i2++;
}
else
{
used[1 - stored].push_back(used[stored][i1]);
i1++;
}
}
stored = 1 - stored;
}
}
fprintf(out, "%i %i %i\n", intervMax.first + 1, intervMax.first + k, maxim - MAXNR);
}