OJ-Problems-Source/HDOJ/3854_autoAC.cpp

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#include<iostream>
#include<cstdio>
#include<cstring>
using namespace std;
#define typev int
#define N 200000
typev ar[N];
int lowb(int t) { return t & (-t) ; }
void add(int i, typev v)
{for ( ; i < N; ar[i] += v, i += lowb(i));}
typev sum(int i)
{
typev s = 0;
for ( ; i > 0; s += ar[i], i -= lowb(i));
return s;
}
int n, m, k;
long long nowans;
int x[N], L[N], R[N], sta[N];
void init()
{
memset(L, -1, sizeof(L)); memset(R, -1, sizeof(R));
memset(ar, 0, sizeof(ar));
for(int i = 1; i <= n; i++) if (x[i] < k)
for(int j = i + 1; j <= n && x[j] >= k; j++)
L[j] = i;
for(int i = n; i >= 1; i--) if (x[i] < k)
for(int j = i - 1; j >= 1 && x[j] >= k; j--)
R[j] = i;
}
int Get(int l, int r, int now)
{
if (l > r) return 0;
if (l == -1 || r == -1) return 0;
if (now == 0) return r - l + 1 - (sum(r) - sum(l - 1));
return sum(r) - sum(l - 1);
}
int main()
{
int t;scanf("%d", &t);
while(t--)
{
scanf("%d%d%d", &n, &m, &k);
for(int i = 1; i <= n; i++) scanf("%d", &x[i]);
init();
for(int i = 1; i <= n; i++)
{
scanf("%d", &sta[i]);
if (sta[i]) add(i, 1);
}
nowans = 0;
for(int i = 1; i <= n; i++)
if (x[i] < k) nowans += Get(i + 1, n, !sta[i]);
else nowans += Get(R[i], n, !sta[i]);
while(m--)
{
int tmp;scanf("%d", &tmp);
if (tmp == 1) cout << nowans << endl;
else
{
scanf("%d", &tmp);
int before = 0, after = 0;
int i = tmp;
if (x[tmp] < k)
{
before += Get(1, i - 1, !sta[i]) + Get(i + 1, n, !sta[i]);
after += Get(1, i - 1, sta[i]) + Get(i + 1, n, sta[i]);
}else
{
before += Get(1, L[i], !sta[i]) + Get(R[i], n, !sta[i]);
after += Get(1, L[i], sta[i]) + Get(R[i], n, sta[i]);
}
if (sta[i] == 0) add(i, 1), sta[i] = 1;
else add(i, -1), sta[i] = 0;
nowans += (after - before);
}
}
}
return 0;
}