제출 #425529

#제출 시각아이디문제언어결과실행 시간메모리
425529haxorman선물상자 (IOI15_boxes)C++14
10 / 100
2 ms332 KiB
#include "boxes.h" #include "bits/stdc++.h" using namespace std; int n, k, l; long long delivery(int N, int K, int L, int p[]) { n = N, k = K, l = L; long long ans = 0; if (k == 1) { for (int i = 0; i < n; ++i) { ans += min(p[i], (l - 1) - p[i] + 1) * 2; } } else if (k == n) { int lb = 0, rb = l - 1; while (rb - lb > 1) { int mid = (lb + rb) / 2; if (p[mid] <= l / 2) { lb = mid; } else { rb = mid; } } ans += 2 * lb; lb = 1, rb = l; while (rb - lb > 1) { int mid = (lb + rb) / 2; if (p[mid] > l / 2) { rb = mid; } else { lb = mid; } } if (rb != l) { ans += 2 * ((l - 1) - rb + 1); } ans = min(ans, (long long) l); } return ans; }
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