OJ-Problems-Source/HDOJ/4476_autoAC.cpp

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#include <cstdlib>
#include <cstring>
#include <iostream>
#include <algorithm>
#include <cstdio>
#include <set>
using namespace std;
const int MaxN = 200000;
int N;
int bit[MaxN+5];
inline int lwb(int x) {
return x & -x;
}
void add(int x, int val) {
for (int i = x; i <= MaxN; i += lwb(i)) {
bit[i] += val;
}
}
int sum(int x) {
int ret = 0;
for (int i = x; i > 0; i -= lwb(i)) {
ret += bit[i];
}
return ret;
}
int cal(int x) {
if (x <= MaxN/2) {
int k = x << 1;
return sum(k) - sum(k-1) + sum(MaxN) - sum(x - 1);
} else {
return sum(MaxN) - sum(x - 1);
}
}
char vis[100005];
int que[100005];
int tail;
int main() {
int T, x;
scanf("%d", &T);
while (T--) {
scanf("%d", &N);
tail = 0;
memset(bit, 0, sizeof (bit));
memset(vis, 0, sizeof (vis));
for (int i = 0; i < N; ++i) {
scanf("%d", &x);
add(x<<1, 1);
if (!vis[x]) {
vis[x] = 1;
que[tail++] = x;
}
}
int Max = 0;
for (int i = 0; i < tail; ++i) {
Max = max(Max, cal(que[i]));
}
printf("%d\n", Max);
}
return 0;
}