test/cpv/aizu-dpl/dpl_3_a.cpp
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|---|---|---|---|
| 1 | // competitive-verifier: PROBLEM https://onlinejudge.u-aizu.ac.jp/courses/library/7/DPL/all/DPL_3_A | ||
| 2 | #include "../../../src/opt/hoverline/lib.hpp" | ||
| 3 | |||
| 4 | using namespace tifa_libs; | ||
| 5 | 40 | int main() { | |
| 6 |
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40 | std::cin.tie(nullptr)->std::ios::sync_with_stdio(false); |
| 7 | u32 h, w; | ||
| 8 |
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40 | std::cin >> h >> w; |
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40 | vecu v(w); |
| 10 | 40 | u64 ans = 0; | |
| 11 |
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13060 | flt_ (u32, i, 0, h) { |
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11723127 | flt_ (u32, j, 0, w, x) { |
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11710107 | std::cin >> x; |
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11710107 | if (x) v[j] = 0; |
| 15 | 6263331 | else ++v[j]; | |
| 16 | } | ||
| 17 | 13020 | auto [l, r] = hoverline(v); | |
| 18 |
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11723127 | flt_ (u32, j, 0, w) { |
| 19 | 11710107 | u32 _ = min(r[j] - l[j] + 1, v[j]); | |
| 20 | 11710107 | ans = max(ans, (u64)_ * _); | |
| 21 | } | ||
| 22 | 13020 | } | |
| 23 |
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40 | std::cout << ans << '\n'; |
| 24 | 40 | return 0; | |
| 25 | 40 | } | |
| 26 |