제출 #301168

#제출 시각아이디문제언어결과실행 시간메모리
301168luciocf식물 비교 (IOI20_plants)C++14
0 / 100
81 ms3192 KiB
#include <bits/stdc++.h> #include "plants.h" using namespace std; const int maxn = 2e5+10; int n; int head[maxn]; int r[maxn]; void init(int k, vector<int> a) { n = a.size(); for (int i = 0; i < n; i++) r[i] = a[i]; head[0] = head[1] = 0; int at = r[0]; for (int i = 1; i < n-1; i++) { if (r[i] == at) head[i+1] = head[i]; else { head[i+1] = i; at = r[i]; } } } int compare_plants(int x, int y) { if (x == 0 && y == n-1) { if (r[n-1] == 0) return -1; return 1; } if (x == n-1 && y == 0) { if (r[n-1] == 0) return 1; return -1; } if (x < y && head[y] <= x) { if (r[x] == 0) return 1; return -1; } else if (x > y && head[x] <= y) { if (r[y] == 0) return -1; return 1; } else if (head[x] == 0 && head[n-1] <= y) { if (r[y] == 0 && r[n-1] == 0 && r[0] == 0) return -1; if (r[y] == 1 && r[n-1] == 1 && r[0] == 1) return 1; } else if (head[y] == 0 && head[n-1] <= x) { if (r[x] == 0 && r[n-1] == 0 && r[0] == 0) return 1; if (r[x] == 1 && r[n-1] == 1 && r[0] == 1) return -1; } return 0; }
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