#include <iostream>
#include <vector>
#include "message.h"
#include "teatr.h"
using namespace std;
const int H = 20;
const int MAX_ELEMENT = 1000000;
int count_of_value[1 + MAX_ELEMENT];
int index_of_value[1 + MAX_ELEMENT];
long long tree[1 << (H + 1)];
vector<int> unique_values;
void update(int i, int j)
{
i += 1 << H;
j += 1 << H;
while (i < j) {
if (i & 1) {
++tree[i];
++i;
}
if (!(j & 1)) {
++tree[j];
--j;
}
i >>= 1;
j >>= 1;
}
if (i == j) {
++tree[i];
}
}
int query(int i)
{
int s = 0;
i += 1 << H;
while (i) {
s += tree[i];
i >>= 1;
}
return s;
}
int main()
{
int n = GetN();
for (int i = 0; i < n; ++i) {
++count_of_value[GetElement(i)];
}
for (int i = 1; i <= MAX_ELEMENT; ++i) {
if (count_of_value[i] > 0) {
index_of_value[i] = unique_values.size();
unique_values.push_back(i);
}
}
int size = unique_values.size() / NumberOfNodes() + !!(unique_values.size() % NumberOfNodes());
int index_from = MyNodeId() * size;
int index_to = index_from + size - 1;
if (index_from >= (int)unique_values.size()) {
PutLL(0, 0);
Send(0);
return 0;
}
if (index_to >= (int)unique_values.size()) {
index_to = unique_values.size() - 1;
}
int value_from = unique_values[index_from];
int value_to = unique_values[index_to];
long long answer = 0;
long long count_of_bigger_values = 0;
for (int i = 0; i < n; ++i) {
int value = GetElement(i);
if (value < value_from) {
continue;
}
if (value > value_to) {
++count_of_bigger_values;
continue;
}
int index = index_of_value[value];
answer += count_of_bigger_values + query(index);
if (index > index_from) {
update(index_from, index - 1);
}
}
if (MyNodeId() > 0) {
PutLL(0, answer);
Send(0);
return 0;
}
int numberOfNodes = NumberOfNodes();
for (int i = 1; i < numberOfNodes; ++i) {
Receive(i);
answer += GetLL(i);
}
cout << answer << endl;
return 0;
}
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 | #include <iostream> #include <vector> #include "message.h" #include "teatr.h" using namespace std; const int H = 20; const int MAX_ELEMENT = 1000000; int count_of_value[1 + MAX_ELEMENT]; int index_of_value[1 + MAX_ELEMENT]; long long tree[1 << (H + 1)]; vector<int> unique_values; void update(int i, int j) { i += 1 << H; j += 1 << H; while (i < j) { if (i & 1) { ++tree[i]; ++i; } if (!(j & 1)) { ++tree[j]; --j; } i >>= 1; j >>= 1; } if (i == j) { ++tree[i]; } } int query(int i) { int s = 0; i += 1 << H; while (i) { s += tree[i]; i >>= 1; } return s; } int main() { int n = GetN(); for (int i = 0; i < n; ++i) { ++count_of_value[GetElement(i)]; } for (int i = 1; i <= MAX_ELEMENT; ++i) { if (count_of_value[i] > 0) { index_of_value[i] = unique_values.size(); unique_values.push_back(i); } } int size = unique_values.size() / NumberOfNodes() + !!(unique_values.size() % NumberOfNodes()); int index_from = MyNodeId() * size; int index_to = index_from + size - 1; if (index_from >= (int)unique_values.size()) { PutLL(0, 0); Send(0); return 0; } if (index_to >= (int)unique_values.size()) { index_to = unique_values.size() - 1; } int value_from = unique_values[index_from]; int value_to = unique_values[index_to]; long long answer = 0; long long count_of_bigger_values = 0; for (int i = 0; i < n; ++i) { int value = GetElement(i); if (value < value_from) { continue; } if (value > value_to) { ++count_of_bigger_values; continue; } int index = index_of_value[value]; answer += count_of_bigger_values + query(index); if (index > index_from) { update(index_from, index - 1); } } if (MyNodeId() > 0) { PutLL(0, answer); Send(0); return 0; } int numberOfNodes = NumberOfNodes(); for (int i = 1; i < numberOfNodes; ++i) { Receive(i); answer += GetLL(i); } cout << answer << endl; return 0; } |
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