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3.11 kB
| // Dislodging Logs | |
| // Solution by Jacob Plachta | |
| using namespace std; | |
| template<typename T> T Abs(T x) { return(x < 0 ? -x : x); } | |
| template<typename T> T Sqr(T x) { return(x * x); } | |
| string plural(string s) { return(Sz(s) && s[Sz(s) - 1] == 'x' ? s + "en" : s + "s"); } | |
| const int INF = (int)1e9; | |
| const LD EPS = 1e-12; | |
| const LD PI = acos(-1.0); | |
| bool Read(int& x) | |
| { | |
| char c, r = 0, n = 0; | |
| x = 0; | |
| for (;;) | |
| { | |
| c = GETCHAR(); | |
| if ((c < 0) && (!r)) | |
| return(0); | |
| if ((c == '-') && (!r)) | |
| n = 1; | |
| else | |
| if ((c >= '0') && (c <= '9')) | |
| x = x * 10 + c - '0', r = 1; | |
| else | |
| if (r) | |
| break; | |
| } | |
| if (n) | |
| x = -x; | |
| return(1); | |
| } | |
| int N[2], K, S; | |
| int P[2][LIM]; | |
| void ReadSeq(int* V, int N, int K) | |
| { | |
| int i, A, B, C, D; | |
| Fox(i, K) | |
| Read(V[i]); | |
| Read(A), Read(B), Read(C), Read(D); | |
| FoxI(i, K, N - 1) | |
| V[i] = ((LL)A * V[i - 2] + (LL)B * V[i - 1] + C) % D + 1; | |
| } | |
| bool IsValid(LL m) | |
| { | |
| int i, j = 0; | |
| // iterate over log drivers from left to right | |
| Fox(i, N[0]) | |
| { | |
| // greedily allocate as many clusters as possible to this log driver | |
| int k = j; | |
| while (k < N[1]) | |
| { | |
| LL d = min(Abs(P[0][i] - P[1][j]), Abs(P[0][i] - P[1][k])) + (P[1][k] - P[1][j]); | |
| if (d > m) | |
| break; | |
| k++; | |
| } | |
| // all clusters covered? | |
| if (k == N[1]) | |
| return(1); | |
| j = k; | |
| } | |
| return(0); | |
| } | |
| LL ProcessCase() | |
| { | |
| int i; | |
| // input, and sort by position | |
| Fox(i, 2) | |
| Read(N[i]); | |
| Read(K), Read(S); | |
| Fox(i, 2) | |
| { | |
| ReadSeq(P[i], N[i], K); | |
| sort(P[i], P[i] + N[i]); | |
| } | |
| // binary search for min. valid # of seconds | |
| LL r1 = 1, r2 = INF; | |
| while (r2 > r1) | |
| { | |
| LL m = (r1 + r2) >> 1; | |
| if (IsValid(m)) | |
| r2 = m; | |
| else | |
| r1 = m + 1; | |
| } | |
| return(r1); | |
| } | |
| int main() | |
| { | |
| int T, t; | |
| Read(T); | |
| Fox1(t, T) | |
| printf("Case #%d: %lld\n", t, ProcessCase()); | |
| return(0); | |
| } |