제출 #918889

#제출 시각아이디문제언어결과실행 시간메모리
918889vjudge1카멜레온의 사랑 (JOI20_chameleon)C++17
40 / 100
15 ms600 KiB
#include "chameleon.h" #include <bits/stdc++.h> using namespace std; void Solve(int N) { auto ask = [&](vector<int> p) { for (auto& x : p) x++; return Query(p); }; vector<vector<int>> one_match(N * 2); for (int i = 0; i < 2 * N; i++) { for (int j = i + 1; j < 2 * N; j++) { if (ask({i, j}) == 1) one_match[i].emplace_back(j), one_match[j].emplace_back(i); } } vector<int> answer(2 * N); vector<int> love(2 * N); vector<int> evol(2 * N); for (int i = 0; i < 2 * N; i++) { assert(one_match[i].size() % 2); if (one_match[i].size() == 1) { if (answer[i]) continue; answer[i] = 1; answer[one_match[i][0]] = 1; Answer(i + 1, one_match[i][0] + 1); } else { assert(one_match[i].size() == 3); int a = one_match[i][0]; int b = one_match[i][1]; int c = one_match[i][2]; if (ask({i, a, b}) == 1) { love[i] = c; evol[c] = i; } else if (ask({i, a, c}) == 1) { love[i] = b; evol[b] = i; } else { love[i] = a; evol[a] = i; } } } for (int i = 0; i < 2 * N; i++) { if (answer[i]) continue; for (int j : one_match[i]) { if (j == love[i]) continue; if (j == evol[i]) continue; answer[i] = answer[j] = 1; Answer(i + 1, j + 1); } } }
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