Submission #1180329

#TimeUsernameProblemLanguageResultExecution timeMemory
1180329patgraRope (JOI17_rope)C++20
55 / 100
2207 ms327680 KiB
#include <bits/stdc++.h> #define rep(a,b,c) for(auto a = (b); a != (c); a++) #define repD(a,b,c) for(auto a = (b); a != (c); a--) #define repIn(a, b) for(auto& a : (b)) #define repIn2(a, b, c) for(auto& [a, b] : (c)) constexpr bool dbg = 1; #define DEBUG if constexpr(dbg) #define DC DEBUG std::cerr #define eol std::endl #define ll long long #define pb push_back using namespace std; int main() { ios_base::sync_with_stdio(false); cin.tie(nullptr); cout.tie(nullptr); int n, m; cin >> n >> m; vector<int> iniCol(n); rep(i, 0, n) cin >> iniCol[i]; vector<int> ans(m + 1, 1e9); map<pair<int, int>, int> ileTakich; vector<int> ilePojedynczych(m + 1, 0), ilePodwojnych(m + 1, 0); map<pair<int, int>, int> ileTakich2; vector<int> ilePojedynczych2(m + 1, 0), ilePodwojnych2(m + 1, 0); rep(i, 0, n - 1) { if(i % 2 == 0) { auto c1 = iniCol[i], c2 = iniCol[i + 1]; if(c1 == c2) ilePodwojnych[c1]++; else ilePojedynczych[c1]++, ilePojedynczych[c2]++, ileTakich[pair{min(c1, c2), max(c1, c2)}]++; } else { auto c1 = iniCol[i], c2 = iniCol[i + 1]; if(c1 == c2) ilePodwojnych2[c1]++; else ilePojedynczych2[c1]++, ilePojedynczych2[c2]++, ileTakich2[pair{min(c1, c2), max(c1, c2)}]++; } } rep(c1, 1, m + 1) rep(c2, 1, m + 1) { int ileWsumie = n / 2; auto ilePoj = ilePojedynczych[c1] + (c1 == c2 ? 0 : ilePojedynczych[c2] - ileTakich[pair{min(c1, c2), max(c1, c2)}]); auto ilePod = ilePodwojnych[c1] + (c1 == c2 ? 0 : ilePodwojnych[c2]); int ileNie = ileWsumie - ilePod - ilePoj; auto cost1 = ileNie * 2 + ilePoj; if(n % 2 == 1) cost1 += iniCol.back() != c1 && iniCol.back() != c2; if(n % 2 == 0) ileWsumie--; ilePoj = ilePojedynczych2[c1] + (c1 == c2 ? 0 : ilePojedynczych2[c2] - ileTakich2[pair{min(c1, c2), max(c1, c2)}]); ilePod = ilePodwojnych2[c1] + (c1 == c2 ? 0 : ilePodwojnych2[c2]); ileNie = ileWsumie - ilePod - ilePoj; auto cost2 = ileNie * 2 + ilePoj; cost2 += iniCol[0] != c1 && iniCol[0] != c2; if(n % 2 == 0) cost2 += iniCol.back() != c1 && iniCol.back() != c2; auto cost = min(cost1, cost2); ans[c1] = min(ans[c1], cost); ans[c2] = min(ans[c2], cost); } rep(i, 0, m) cout << ans[i + 1] << '\n'; }
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