Submission #157032

#	Time	Username	Problem	Language	Result	Execution time	Memory
157032		jhwest2	Toilets (JOI16_toilets)	C++14	36 / 100	17 ms	2044 KiB

toilets

#include <bits/stdc++.h>
#define va first
#define vb second
using namespace std;
typedef long long ll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;

int N, M, K, cnt;
string s;
vector<int> A, B;
int main() {
	cin.tie(0); ios_base::sync_with_stdio(0);

	cin >> N >> M;
	cin >> s >> K;

	for (int i=0; i<s.size(); i++) {
		if (s[i] == 'F') ++cnt;
		else A.push_back(cnt);
	}

	if (A.size() > N) { cout << -1; return 0; }

	for (int i=0; i<A.size(); i++) {
		B.push_back(min(A[i], 2*(N-(int)A.size())+1+i));
	}

	int ans=0, ap=0, bp=0;
	for (int i=1; i<=2*N; i++) {
		while (ap!=A.size() && A[ap]<i) ++ap;
		while (bp!=B.size() && B[bp]<i) ++bp;
		ans = max(ans, bp-ap);
	}

	cout << ans;
}

Compilation message (stderr)

toilets.cpp: In function 'int main()':
toilets.cpp:18:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for (int i=0; i<s.size(); i++) {
                ~^~~~~~~~~
toilets.cpp:23:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  if (A.size() > N) { cout << -1; return 0; }
      ~~~~~~~~~^~~
toilets.cpp:25:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for (int i=0; i<A.size(); i++) {
                ~^~~~~~~~~
toilets.cpp:31:12: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   while (ap!=A.size() && A[ap]<i) ++ap;
          ~~^~~~~~~~~~
toilets.cpp:32:12: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   while (bp!=B.size() && B[bp]<i) ++bp;
          ~~^~~~~~~~~~

• Subtask 1: 14 / 14
• Subtask 2: 22 / 22
• Subtask 3: 0 / 64