#include <bits/stdc++.h>
using namespace std;
const int N = 1e5 + 5;
const int S = 320;
struct BIT
{
int bit[S][N], n;
void update(int x, int y) {
for (int i = x; i > 0; i -= i & -i) {
for (int j = y; j > 0; j -= j & -j) {
bit[i][j]++;
}
}
}
int query(int x, int y) {
int ret = 0;
for (int i = x; i <= n; i += i & -i) {
for (int j = y; j <= n; j += j & -j) {
ret += bit[i][j];
}
}
return ret;
}
} bit;
struct Query
{
int x, y, z, id;
Query() {}
Query(int _x, int _y, int _z, int _id): x(_x), y(_y), z(_z), id(_id) {}
bool operator<(Query other) {
return z > other.z;
}
} q[N];
struct Aluno
{
int a, b, soma;
Aluno() {}
Aluno(int _a, int _b): a(_a), b(_b), soma(_a + _b) {}
bool operator<(Aluno other) {
return soma > other.soma;
}
} a[N];
vector<pair<int, int>> cmp[2];
vector<Aluno> bloco[N];
int main() {
int n, m;
scanf("%d %d", &n, &m);
for (int i = 0; i < n; i++) {
int s, t;
scanf("%d %d", &s, &t);
a[i] = Aluno(s, t);
cmp[0].emplace_back(s, i);
cmp[1].emplace_back(t, i);
}
// comprime s e t
for (int i : {0, 1}) {
sort(cmp[i].begin(), cmp[i].end());
}
// conserta os ranges das queries
for (int i = 0; i < m; i++) {
int x, y, z;
cin >> x >> y >> z;
auto it = lower_bound(cmp[0].begin(), cmp[0].end(), make_pair(x, -1));
x = (int) (it - cmp[0].begin()) + 1;
it = lower_bound(cmp[1].begin(), cmp[1].end(), make_pair(y, -1));
y = (int) (it - cmp[1].begin()) + 1;
q[i] = Query(x, y, z, i);
}
// comprime de verdade
for (int i = 0; i < n; i++) {
a[cmp[0][i].second].a = i + 1;
}
for (int i = 0; i < n; i++) {
a[cmp[1][i].second].b = i + 1;
}
// ordeno os alunos pela soma pra sempre pegar um prefixo do array
sort(a, a + n);
sort(q, q + n);
bit.n = n;
int ptr = 0;
vector<int> ans(m);
for (int i = 0; i < m; i++) {
for (; ptr < n && a[ptr].soma >= q[i].z; ptr++) {
bit.update(a[ptr].a / S, a[ptr].b); // bloco do a, valor do b
bloco[a[ptr].a / S].push_back(a[ptr]);
}
// com certeza todos os "eventos" com soma >= q[i].z ja foram processados
ans[q[i].id] = bit.query(q[i].x / S + 1, q[i].y);
for (auto cara : bloco[q[i].x / S]) {
ans[q[i].id] += (cara.a >= q[i].x && cara.b >= q[i].y);
}
}
for (int i = 0; i < m; i++) {
printf("%d\n", ans[i]);
}
}
Compilation message
examination.cpp: In function 'int main()':
examination.cpp:55:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
55 | scanf("%d %d", &n, &m);
| ~~~~~^~~~~~~~~~~~~~~~~
examination.cpp:58:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
58 | scanf("%d %d", &s, &t);
| ~~~~~^~~~~~~~~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
2 ms |
2668 KB |
Output is correct |
| 2 |
Correct |
2 ms |
2668 KB |
Output is correct |
| 3 |
Correct |
3 ms |
2796 KB |
Output is correct |
| 4 |
Correct |
2 ms |
2668 KB |
Output is correct |
| 5 |
Correct |
2 ms |
2668 KB |
Output is correct |
| 6 |
Correct |
2 ms |
2668 KB |
Output is correct |
| 7 |
Runtime error |
18 ms |
5740 KB |
Execution killed with signal 11 |
| 8 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Runtime error |
432 ms |
267992 KB |
Execution killed with signal 11 |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Runtime error |
432 ms |
267992 KB |
Execution killed with signal 11 |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
2 ms |
2668 KB |
Output is correct |
| 2 |
Correct |
2 ms |
2668 KB |
Output is correct |
| 3 |
Correct |
3 ms |
2796 KB |
Output is correct |
| 4 |
Correct |
2 ms |
2668 KB |
Output is correct |
| 5 |
Correct |
2 ms |
2668 KB |
Output is correct |
| 6 |
Correct |
2 ms |
2668 KB |
Output is correct |
| 7 |
Runtime error |
18 ms |
5740 KB |
Execution killed with signal 11 |
| 8 |
Halted |
0 ms |
0 KB |
- |
