제출 #1072496

#제출 시각아이디문제언어결과실행 시간메모리
1072496Boas메기 농장 (IOI22_fish)C++17
3 / 100
1169 ms1815044 KiB
#include "fish.h" #include <bits/stdc++.h> using namespace std; #pragma GCC optimize("Ofast") #define loop(x, i) for (int i = 0; i < (x); i++) #define loop1(x, i) for (int i = 1; i <= (x); i++) #define rev(x, i) for (int i = (int)(x) - 1; i >= 0; i--) #define itloop(x) for (auto it = begin(x); x != end(x); it++) #define itrev(x) for (auto it = rbegin(x); x != rend(x); it++) #define int long long #define INF ((int64_t)(4e18 + 1)) #define INF32 ((int32_t)(2e9 + 1)) #define ALL(x) begin(x), end(x) #define RALL(x) rbegin(x), rend(x) #define removeIn(x, l) l.erase(find(ALL(l), x)) #define pb push_back #define sz(x) (int)(x).size() #define F first #define S second #define var const auto & #define foreach(l) for (var e : l) typedef int8_t i8; typedef int16_t i16; typedef int32_t i32; typedef int64_t i64; typedef pair<int, int> ii; typedef tuple<int, int, int> iii; typedef tuple<int, int, int, int> iiii; typedef vector<int> vi; typedef vector<i32> vi32; typedef vector<vi> vvi; typedef vector<vvi> vvvi; typedef vector<vvvi> vvvvi; typedef vector<ii> vii; typedef vector<iii> viii; typedef vector<vii> vvii; typedef vector<viii> vviii; typedef set<int> si; typedef set<ii> sii; typedef set<iii> siii; typedef vector<si> vsi; typedef vector<sii> vsii; typedef vector<vsi> vvsi; typedef vector<string> vstr; typedef vector<vector<string>> vvstr; typedef vector<bool> vb; typedef vector<vb> vvb; int max_weights(i32 N, i32 M, vi32 X, vi32 Y, vi32 W) { if (M == 0) return 0; bool allEven = 1; for (int x : X) if (x % 2) allEven = 0; if (allEven) return accumulate(ALL(W), 0LL); N = *max_element(ALL(X)) + 2; int yCount = *max_element(ALL(Y)) + 2; vvi wSum(N, vi(yCount)); { vvi wsAtX(N, vi(yCount)); loop(M, i) { wsAtX[X[i]][Y[i]] = W[i]; } loop(N, x) { loop1(yCount - 1, y) { wSum[x][y] = wSum[x][y - 1] + wsAtX[x][y - 1]; } } } vvvi dp(vvvi(yCount, vvi(yCount, vi(2)))); // 0: adjacentL, 1: adjacentR vvvi dp2(vvvi(yCount, vvi(yCount, vi(2)))); // 0: adjacentL, 1: adjacentR vi maxAll(N); vvi maxOfHeight(N, vi(yCount)); loop(N, x) { vvi pMax1perJ(yCount, vi(yCount)); // dp[<=j][i][1] if (x != 0) { loop(yCount, j) { loop(yCount, i) { pMax1perJ[j][i] = max(j == 0 ? 0 : pMax1perJ[j - 1][i], dp[j][i][1]); } } } loop(yCount, j) { int prevMax = 0; if (x != 0) { loop(yCount, i) { prevMax = max(prevMax, dp[j][i][0]); } } loop(yCount, i) // hoogte van deze steiger { if (j <= i) { dp2[i][j][0] = dp2[i][j][1] = (x == 0) ? 0 : maxOfHeight[x - 1][i]; } else { int sum = wSum[x][j] - wSum[x][i]; if (x == 0) { dp2[i][j][0] = -1; dp2[i][j][1] = sum; } else { dp2[i][j][0] = max(dp[j][i][1], prevMax) + sum; dp2[i][j][1] = max(pMax1perJ[j][i], maxAll[x - 1]) + sum; } } maxAll[x] = max({maxAll[x], dp2[i][j][0]}); maxOfHeight[x][j] = max({maxOfHeight[x][j], dp2[i][j][0], dp2[i][j][1]}); } } dp = dp2; } return maxAll.back(); }
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