Submission #148472

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
148472	2019-09-01T04:29:59 Z	White Fairy(#3613, wifi)	HicCup (FXCUP4_hiccup)	C++17	100 / 100	59 ms	3328 KB

hiccup

#include "hiccup.h"

#include <bits/stdc++.h>

using namespace std;

bool can(string & S, int & it, int x) {
  int cnt = 0, need = 0;
  while (it < S.size()) {
    if (cnt > 0 && need == 0) {
      --cnt;
      need = x;
    }
    char ch = S[it++];
    if (ch == '!') {
      if (need > 0) {
        --need;
      }
    }
    else  if (ch == 'H') {
      bool res = can(S, it, x);
      if (!res)
        return false;
      ++cnt;
    }
    else {
      return cnt <= 0 && need <= 0;
    }
  }
  return cnt <= 0 && need <= 0;
}

int HicCup(std::string S) {
	int N = S.size();
  int open = 0;
  for (int i = 0; i < N; ++i) {
    if (S[i] == 'H')
      ++open;
    else if (S[i] == 'C')
      --open;
    if (open < 0)
      return -1;
  }
  if (open != 0)
    return -1;
  if (S[0] == '!')
    return -1;
  for (int i = 0; i + 1 < N; ++i) {
    if (S[i] == 'H' && S[i+1] == '!')
      return -1;
  }
  int low = 0, hi = N;
  while (low < hi) {
    int mid = (low + hi + 1) >> 1;
    int it = 0;
    if (can(S, it, mid))
      low = mid;
    else
      hi = mid-1;
  }
	return low;
}

Compilation message

hiccup.cpp: In function 'bool can(std::__cxx11::string&, int&, int)':
hiccup.cpp:9:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   while (it < S.size()) {
          ~~~^~~~~~~~~~

Subtask #1

24.0 / 24.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	6 ms	384 KB	Output is correct
2	Correct	5 ms	384 KB	Output is correct
3	Correct	5 ms	384 KB	Output is correct
4	Correct	7 ms	512 KB	Output is correct
5	Correct	25 ms	3328 KB	Output is correct
6	Correct	12 ms	3328 KB	Output is correct
7	Correct	12 ms	3328 KB	Output is correct
8	Correct	25 ms	3328 KB	Output is correct
9	Correct	26 ms	3328 KB	Output is correct
10	Correct	13 ms	3328 KB	Output is correct
11	Correct	5 ms	384 KB	Output is correct

Subtask #2

76.0 / 76.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	6 ms	384 KB	Output is correct
2	Correct	5 ms	384 KB	Output is correct
3	Correct	5 ms	384 KB	Output is correct
4	Correct	7 ms	512 KB	Output is correct
5	Correct	25 ms	3328 KB	Output is correct
6	Correct	12 ms	3328 KB	Output is correct
7	Correct	12 ms	3328 KB	Output is correct
8	Correct	25 ms	3328 KB	Output is correct
9	Correct	26 ms	3328 KB	Output is correct
10	Correct	13 ms	3328 KB	Output is correct
11	Correct	14 ms	3328 KB	Output is correct
12	Correct	13 ms	3328 KB	Output is correct
13	Correct	14 ms	3328 KB	Output is correct
14	Correct	6 ms	384 KB	Output is correct
15	Correct	14 ms	3328 KB	Output is correct
16	Correct	5 ms	384 KB	Output is correct
17	Correct	5 ms	384 KB	Output is correct
18	Correct	6 ms	640 KB	Output is correct
19	Correct	30 ms	3200 KB	Output is correct
20	Correct	23 ms	3328 KB	Output is correct
21	Correct	44 ms	3328 KB	Output is correct
22	Correct	36 ms	3200 KB	Output is correct
23	Correct	50 ms	3328 KB	Output is correct
24	Correct	19 ms	3328 KB	Output is correct
25	Correct	24 ms	3328 KB	Output is correct
26	Correct	19 ms	3328 KB	Output is correct
27	Correct	42 ms	3328 KB	Output is correct
28	Correct	57 ms	3072 KB	Output is correct
29	Correct	59 ms	3328 KB	Output is correct
30	Correct	6 ms	384 KB	Output is correct
31	Correct	5 ms	384 KB	Output is correct
32	Correct	8 ms	640 KB	Output is correct
33	Correct	5 ms	384 KB	Output is correct