Submission #167316

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
167316	2019-12-07 09:46:27	maruii	Minerals (JOI19_minerals)	C++14	70 / 100	47 ms	2424 KiB

minerals

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#include "minerals.h"
#include <bits/stdc++.h>
using namespace std;
int A[43005], S[43005];
void Solve(int N) {
  vector<int> X, Y;
  for (int i = 1, v = 0; i <= 2 * N; ++i) {
    int t = Query(i);
    if (t > v) X.push_back(i);
    else Y.push_back(i);
    v = t;
  }
  for (int i = 0; i < N; ++i) S[i] = 1;
  for (int i = 0; i < 16; ++i) {
    int v = 0, t = 0, cnt = 0;
    for (int j = 0; j < N; ++j) if (S[j] ^ (j >> i) & 1) cnt++;
    if (cnt < N - cnt) t = 1;
    for (int j = 0; j < N; ++j) if (t ^ S[j] ^ (j >> i) & 1) {
      v = Query(X[j]);
      S[j] ^= 1;
    }
    for (int j = 0; j < N; ++j) {
      int a = Query(Y[j]);
      if ((v == a) ^ t) A[j] |= 1 << i;
      v = a;
    }
  }
  for (int i = 0; i < N; ++i) Answer(Y[i], X[A[i]]);
}
 
 
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Compilation message (stderr)

minerals.cpp: In function 'void Solve(int)':
minerals.cpp:17:51: warning: suggest parentheses around arithmetic in operand of '^' [-Wparentheses]
   for (int j = 0; j < N; ++j) if (S[j] ^ (j >> i) & 1) cnt++;
                                          ~~~~~~~~~^~~
minerals.cpp:19:55: warning: suggest parentheses around arithmetic in operand of '^' [-Wparentheses]
   for (int j = 0; j < N; ++j) if (t ^ S[j] ^ (j >> i) & 1) {
                                              ~~~~~~~~~^~~

• Subtask 1: 6 / 6
• Subtask 2: 25 / 25
• Subtask 3: 9 / 9
• Subtask 4: 30 / 30
• Subtask 5: 0 / 5
• Subtask 6: 0 / 5
• Subtask 7: 0 / 5
• Subtask 8: 0 / 5
• Subtask 9: 0 / 10