제출 #1022907

#제출 시각아이디문제언어결과실행 시간메모리
1022907shiomusubi496전선 연결 (IOI17_wiring)C++17
0 / 100
1039 ms5720 KiB
#include "wiring.h" #include <bits/stdc++.h> #define rep(i, n) for (int i = 0; i < (int)(n); ++i) #define rep2(i, a, b) for (int i = (int)(a); i < (int)(b); ++i) #define rrep(i, n) for (int i = (int)(n) - 1; i >= 0; --i) #define rrep2(i, a, b) for (int i = (int)(b) - 1; i >= (int)(a); --i) #define all(v) begin(v), end(v) using namespace std; template<class T, class U> bool chmin(T& a, const U& b) { return a > b ? a = b, true : false; } template<class T, class U> bool chmax(T& a, const U& b) { return a < b ? a = b, true : false; } using ll = long long; constexpr ll inf = 1e18; long long min_total_length(std::vector<int> r, std::vector<int> b) { int N = r.size(), M = b.size(); vector<pair<ll, int>> A(N + M); rep (i, N) A[i] = {r[i], 0}; rep (i, M) A[N + i] = {b[i], 1}; sort(all(A)); vector<int> nxt(N + M + 1); nxt[N + M] = N + M; nxt[N + M - 1] = N + M; rrep (i, N + M - 1) { if (A[i].second == A[i + 1].second) nxt[i] = nxt[i + 1]; else nxt[i] = i + 1; } vector<ll> dp(N + M + 1, inf); dp[0] = 0; rep (i, N + M) { int m = nxt[i]; int r = nxt[m]; if (m != r) { rep2 (j, m, r) { if (m - i >= r - m) { ll sm = 0; rep2 (k, i, m) sm += (A[k + 1].first - A[k].first) * (k - i + 1); rep2 (k, m, j) sm += (A[k + 1].first - A[k].first) * (j - k); chmin(dp[j + 1], dp[i] + sm); } else { ll sm = 0; rep2 (k, i, m - 1) sm += (A[k + 1].first - A[k].first) * (k - i + 1); rep2 (k, m - 1, j) sm += (A[k + 1].first - A[k].first) * (j - k); chmin(dp[j + 1], dp[i] + sm); } } } // if (i != 0 && A[i].second != A[i - 1].second) { // rep2 (j, i, m) { // ll sm = 0; // rep2 (k, i - 1, j) sm += (A[k + 1].first - A[k].first) * (j - k); // chmin(dp[j + 1], dp[i] + sm); // } // } } return dp[N + M]; }
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