oj.uz

Submission #55403

# Submission time Handle Problem Language Result Execution time Memory
55403 2018-07-07T07:51:04 Z 김세빈(#1545) Toilets (JOI16_toilets) C++11
36 / 100
 37 ms 6372 KB 
#include <bits/stdc++.h>

using namespace std;

typedef long long ll;

char str[202020];
ll K[202020], S[202020];
ll T[606060], L[606060];
ll n, k, f, m;

bool check(ll k)
{
	ll i, a, b, s;
	
	for(i=0;i<=n+n;i++) S[i] = 0;
	
	a = b = s = 0;
	
	for(i=0;i<n+n;i++){
		if(a < m && ((~i & 1) || f - b >= m - (a+1)) && (K[a+1] < b+1 || s + S[b+1] < k)){
			S[b+1] ++; S[K[a+1]+1] --;
			a ++;
		}
		else if(b < f && ((~i & 1) || f - (b+1) >= m - a)){
			b ++;
			s += S[b];
		}
		else return 0;
	}
	
	return 1;
}

int main()
{
	ll i, s, e;
	
	scanf("%lld%lld", &n, &k);
	
	if(k > 1) return 0;
	
	scanf("%s", str);
	
	for(i=0;i<n+n;i++){
		if(str[i] == 'F') f ++;
		else{
			m ++;
			K[m] = f;
		}
	}
	
	if(f < m){
		printf("-1\n");
		return 0;
	}
	
	for(s=0,e=n+n;s<=e;){
		if(check(s+e>>1)) e = (s+e>>1) - 1;
		else s = (s+e>>1) + 1;
	}
	
	printf("%lld\n", e + 1);
	
	return 0;
}

Compilation message

toilets.cpp: In function 'int main()':
toilets.cpp:59:13: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   if(check(s+e>>1)) e = (s+e>>1) - 1;
            ~^~
toilets.cpp:59:27: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   if(check(s+e>>1)) e = (s+e>>1) - 1;
                          ~^~
toilets.cpp:60:14: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   else s = (s+e>>1) + 1;
             ~^~
toilets.cpp:39:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%lld%lld", &n, &k);
  ~~~~~^~~~~~~~~~~~~~~~~~~~
toilets.cpp:43:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%s", str);
  ~~~~~^~~~~~~~~~~

Subtask #1
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 248 KB Output is correct
2 Correct 2 ms 356 KB Output is correct
3 Correct 2 ms 432 KB Output is correct
4 Correct 3 ms 508 KB Output is correct
5 Correct 3 ms 512 KB Output is correct
6 Correct 2 ms 544 KB Output is correct
7 Correct 3 ms 544 KB Output is correct
8 Correct 4 ms 544 KB Output is correct
9 Correct 2 ms 544 KB Output is correct
10 Correct 0 ms 544 KB Output is correct
11 Correct 4 ms 584 KB Output is correct
12 Correct 2 ms 620 KB Output is correct
13 Correct 2 ms 620 KB Output is correct
14 Correct 2 ms 620 KB Output is correct
15 Correct 2 ms 620 KB Output is correct
16 Correct 2 ms 620 KB Output is correct
17 Correct 2 ms 624 KB Output is correct
18 Correct 2 ms 636 KB Output is correct
19 Correct 2 ms 636 KB Output is correct
20 Correct 2 ms 636 KB Output is correct
21 Correct 2 ms 636 KB Output is correct
22 Correct 2 ms 636 KB Output is correct

Subtask #2
22.0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 248 KB Output is correct
2 Correct 2 ms 356 KB Output is correct
3 Correct 2 ms 432 KB Output is correct
4 Correct 3 ms 508 KB Output is correct
5 Correct 3 ms 512 KB Output is correct
6 Correct 2 ms 544 KB Output is correct
7 Correct 3 ms 544 KB Output is correct
8 Correct 4 ms 544 KB Output is correct
9 Correct 2 ms 544 KB Output is correct
10 Correct 0 ms 544 KB Output is correct
11 Correct 4 ms 584 KB Output is correct
12 Correct 2 ms 620 KB Output is correct
13 Correct 2 ms 620 KB Output is correct
14 Correct 2 ms 620 KB Output is correct
15 Correct 2 ms 620 KB Output is correct
16 Correct 2 ms 620 KB Output is correct
17 Correct 2 ms 624 KB Output is correct
18 Correct 2 ms 636 KB Output is correct
19 Correct 2 ms 636 KB Output is correct
20 Correct 2 ms 636 KB Output is correct
21 Correct 2 ms 636 KB Output is correct
22 Correct 2 ms 636 KB Output is correct
23 Correct 23 ms 3068 KB Output is correct
24 Correct 29 ms 3324 KB Output is correct
25 Correct 27 ms 3424 KB Output is correct
26 Correct 19 ms 3424 KB Output is correct
27 Correct 4 ms 3424 KB Output is correct
28 Correct 32 ms 4028 KB Output is correct
29 Correct 29 ms 4168 KB Output is correct
30 Correct 25 ms 4680 KB Output is correct
31 Correct 32 ms 4848 KB Output is correct
32 Correct 27 ms 5036 KB Output is correct
33 Correct 4 ms 5036 KB Output is correct
34 Correct 21 ms 5036 KB Output is correct
35 Correct 35 ms 5668 KB Output is correct
36 Correct 37 ms 5816 KB Output is correct
37 Correct 15 ms 5816 KB Output is correct
38 Correct 4 ms 5816 KB Output is correct
39 Correct 27 ms 6296 KB Output is correct
40 Correct 26 ms 6372 KB Output is correct

Subtask #3
0 / 64.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 248 KB Output is correct
2 Correct 2 ms 356 KB Output is correct
3 Correct 2 ms 432 KB Output is correct
4 Correct 3 ms 508 KB Output is correct
5 Correct 3 ms 512 KB Output is correct
6 Correct 2 ms 544 KB Output is correct
7 Correct 3 ms 544 KB Output is correct
8 Correct 4 ms 544 KB Output is correct
9 Correct 2 ms 544 KB Output is correct
10 Correct 0 ms 544 KB Output is correct
11 Correct 4 ms 584 KB Output is correct
12 Correct 2 ms 620 KB Output is correct
13 Correct 2 ms 620 KB Output is correct
14 Correct 2 ms 620 KB Output is correct
15 Correct 2 ms 620 KB Output is correct
16 Correct 2 ms 620 KB Output is correct
17 Correct 2 ms 624 KB Output is correct
18 Correct 2 ms 636 KB Output is correct
19 Correct 2 ms 636 KB Output is correct
20 Correct 2 ms 636 KB Output is correct
21 Correct 2 ms 636 KB Output is correct
22 Correct 2 ms 636 KB Output is correct
23 Correct 23 ms 3068 KB Output is correct
24 Correct 29 ms 3324 KB Output is correct
25 Correct 27 ms 3424 KB Output is correct
26 Correct 19 ms 3424 KB Output is correct
27 Correct 4 ms 3424 KB Output is correct
28 Correct 32 ms 4028 KB Output is correct
29 Correct 29 ms 4168 KB Output is correct
30 Correct 25 ms 4680 KB Output is correct
31 Correct 32 ms 4848 KB Output is correct
32 Correct 27 ms 5036 KB Output is correct
33 Correct 4 ms 5036 KB Output is correct
34 Correct 21 ms 5036 KB Output is correct
35 Correct 35 ms 5668 KB Output is correct
36 Correct 37 ms 5816 KB Output is correct
37 Correct 15 ms 5816 KB Output is correct
38 Correct 4 ms 5816 KB Output is correct
39 Correct 27 ms 6296 KB Output is correct
40 Correct 26 ms 6372 KB Output is correct
41 Incorrect 2 ms 6372 KB Output isn't correct
42 Halted 0 ms 0 KB -