test/cpv/aizu-dsl/dsl_1_b.cpp
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| 1 | // competitive-verifier: PROBLEM https://onlinejudge.u-aizu.ac.jp/courses/library/3/DSL/all/DSL_1_B | ||
| 2 | #include "../../../src/ds/dsu/w/lib.hpp" | ||
| 3 | |||
| 4 | using namespace tifa_libs; | ||
| 5 | 24 | int main() { | |
| 6 |
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24 | std::cin.tie(nullptr)->std::ios::sync_with_stdio(false); |
| 7 | u32 n, q; | ||
| 8 |
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24 | std::cin >> n >> q; |
| 9 | 24 | dsu_weighted dsu(n); | |
| 10 |
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1241717 | flt_ (u32, i, 0, q) { |
| 11 | u32 op, u, v; | ||
| 12 |
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1241693 | std::cin >> op >> u >> v; |
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1241693 | if (op) { |
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578816 | if (!dsu.same(u, v)) std::cout << "?\n"; |
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211373 | else std::cout << dsu.diff(u, v) << '\n'; |
| 16 | } else { | ||
| 17 | i64 k; | ||
| 18 |
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662877 | std::cin >> k; |
| 19 | 662877 | dsu.merge(u, v, k); | |
| 20 | } | ||
| 21 | } | ||
| 22 | 24 | return 0; | |
| 23 | 24 | } | |
| 24 |