test/cpv/aizu-dsl/dsl_5_b.cpp
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|---|---|---|---|
| 1 | // competitive-verifier: PROBLEM https://onlinejudge.u-aizu.ac.jp/courses/library/3/DSL/all/DSL_5_B | ||
| 2 | #include "../../../src/ds/fenwick/d2/lib.hpp" | ||
| 3 | |||
| 4 | using namespace tifa_libs; | ||
| 5 | 30 | int main() { | |
| 6 |
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30 | std::cin.tie(nullptr)->std::ios::sync_with_stdio(false); |
| 7 | 30 | fenwick2d<u32> tr(1003, 1003); | |
| 8 | u32 n; | ||
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30 | std::cin >> n; |
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435971 | for (u32 i = 0, xl, xr, yl, yr; i < n; ++i) { |
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435941 | std::cin >> xl >> yl >> xr >> yr; |
| 12 | 435941 | tr.add(xl + 1, yl + 1, xr + 1, yr + 1, 1); | |
| 13 | } | ||
| 14 | 30 | u32 mx = 0; | |
| 15 |
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30060 | flt_ (u32, i, 1, 1002) |
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30090060 | flt_ (u32, j, 1, 1002) mx = std::max(mx, tr.sum(i, j)); |
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30 | std::cout << mx << '\n'; |
| 18 | 30 | return 0; | |
| 19 | 30 | } | |
| 20 |