test/cpv/aizu-dpl/dpl_3_b.cpp
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| 1 | // competitive-verifier: PROBLEM https://onlinejudge.u-aizu.ac.jp/courses/library/7/DPL/all/DPL_3_B | ||
| 2 | #include "../../../src/opt/hoverline/lib.hpp" | ||
| 3 | |||
| 4 | using namespace tifa_libs; | ||
| 5 | 50 | int main() { | |
| 6 |
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50 | std::cin.tie(nullptr)->std::ios::sync_with_stdio(false); |
| 7 | u32 h, w; | ||
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50 | std::cin >> h >> w; |
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50 | vecu v(w); |
| 10 | 50 | u64 ans = 0; | |
| 11 |
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13235 | flt_ (u32, i, 0, h) { |
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11723941 | flt_ (u32, j, 0, w, x) { |
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11710756 | std::cin >> x; |
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11710756 | if (x) v[j] = 0; |
| 15 | 6263714 | else ++v[j]; | |
| 16 | } | ||
| 17 | 13185 | auto [l, r] = hoverline(v); | |
| 18 |
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11723941 | flt_ (u32, j, 0, w) ans = max(ans, (r[j] - l[j] + 1_u64) * v[j]); |
| 19 | 13185 | } | |
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50 | std::cout << ans << '\n'; |
| 21 | 50 | return 0; | |
| 22 | 50 | } | |
| 23 |