Submission #19636555


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#include <bits/stdc++.h>
using namespace std;
typedef signed long long ll;

#define _P(...) (void)printf(__VA_ARGS__)
#define FOR(x,to) for(x=0;x<(to);x++)
#define FORR(x,arr) for(auto& x:arr)
#define FORR2(x,y,arr) for(auto& [x,y]:arr)
#define ALL(a) (a.begin()),(a.end())
#define ZERO(a) memset(a,0,sizeof(a))
#define MINUS(a) memset(a,0xff,sizeof(a))
template<class T> bool chmax(T &a, const T &b) { if(a<b){a=b;return 1;}return 0;}
template<class T> bool chmin(T &a, const T &b) { if(a>b){a=b;return 1;}return 0;}
//-------------------------------------------------------


int N,M,K;
int A[101010];
int NG[101010];
int SNG[101010];
double dp[202020],S[202020];

double hoge(double v) {
	int i;
	
	for(i=N-1;i>=0;i--) {
		if(NG[i]) {
			dp[i]=v;
		}
		else {
			dp[i]=1+(S[i+1]-S[i+1+M])/M;
		}
		S[i]=S[i+1]+dp[i];
	}
	return dp[0];
}


void solve() {
	int i,j,k,l,r,x,y; string s;
	
	cin>>N>>M>>K;
	int p=-1,cur=0;
	FOR(i,K) {
		cin>>A[i];
		if(p+1!=A[i]) cur=0;
		p=A[i];
		NG[A[i]]=1;
		cur++;
		if(cur==M) return _P("-1\n");
	}
	
	double L=0,R=1e10;
	FOR(i,100) {
		double M=(L+R)/2;
		if(hoge(M)>M) L=M;
		else R=M;
	}
	_P("%.12lf\n",L);
	
}


int main(int argc,char** argv){
	string s;int i;
	if(argc==1) ios::sync_with_stdio(false), cin.tie(0);
	FOR(i,argc-1) s+=argv[i+1],s+='\n'; FOR(i,s.size()) ungetc(s[s.size()-1-i],stdin);
	cout.tie(0); solve(); return 0;
}

Submission Info

Submission Time
Task F - Sugoroku2
User kmjp
Language C++ (GCC 9.2.1)
Score 0
Code Size 1445 Byte
Status WA
Exec Time 101 ms
Memory 5340 KB

Compile Error

./Main.cpp: In function ‘void solve()’:
./Main.cpp:40:8: warning: unused variable ‘j’ [-Wunused-variable]
   40 |  int i,j,k,l,r,x,y; string s;
      |        ^
./Main.cpp:40:10: warning: unused variable ‘k’ [-Wunused-variable]
   40 |  int i,j,k,l,r,x,y; string s;
      |          ^
./Main.cpp:40:12: warning: unused variable ‘l’ [-Wunused-variable]
   40 |  int i,j,k,l,r,x,y; string s;
      |            ^
./Main.cpp:40:14: warning: unused variable ‘r’ [-Wunused-variable]
   40 |  int i,j,k,l,r,x,y; string s;
      |              ^
./Main.cpp:40:16: warning: unused variable ‘x’ [-Wunused-variable]
   40 |  int i,j,k,l,r,x,y; string s;
      |                ^
./Main.cpp:40:18: warning: unused variable ‘y’ [-Wunused-variable]
   40 |  int i,j,k,l,r,x,y; string s;
      |                  ^
./Main.cpp: In function ‘int main(int, char**)’:
./Main.cpp:6:28: warning: comparison of integer expressions of different signedness: ‘int’ and ‘std::__cxx11::basic_string<char>::size_type’ {aka ‘long unsigned int’} [-Wsign-compare]
    6 | #define FOR(x,to) for(x=0;x<(to);x++)
      |                            ^
./Main.cpp:67:38: note: in expansion of macro ‘FOR’
   67 |  FOR(i,argc-1) s+=argv[i+1],s+='\n'; FOR(i,s.size()) ungetc(s[s.size()-1-i],stdin);
      |                                      ^~~

Judge Result

Set Name Sample All
Score / Max Score 0 / 0 0 / 600
Status
AC × 4
AC × 28
WA × 2
Set Name Test Cases
Sample sample_01.txt, sample_02.txt, sample_03.txt, sample_04.txt
All hand_01.txt, hand_02.txt, hand_04.txt, max_01.txt, max_02.txt, max_03.txt, max_04.txt, random_01.txt, random_02.txt, random_03.txt, random_04.txt, random_05.txt, random_06.txt, random_07.txt, random_08.txt, random_09.txt, random_10.txt, random_11.txt, random_12.txt, random_14.txt, random_15.txt, random_16.txt, sample_01.txt, sample_02.txt, sample_03.txt, sample_04.txt, unreachable_01.txt, unreachable_02.txt, unreachable_03.txt, unreachable_04.txt
Case Name Status Exec Time Memory
hand_01.txt AC 95 ms 5152 KB
hand_02.txt AC 2 ms 3568 KB
hand_04.txt AC 3 ms 3768 KB
max_01.txt AC 98 ms 5340 KB
max_02.txt WA 94 ms 5196 KB
max_03.txt AC 94 ms 5200 KB
max_04.txt WA 94 ms 5104 KB
random_01.txt AC 96 ms 5212 KB
random_02.txt AC 19 ms 3860 KB
random_03.txt AC 92 ms 5116 KB
random_04.txt AC 8 ms 3684 KB
random_05.txt AC 98 ms 5252 KB
random_06.txt AC 93 ms 5088 KB
random_07.txt AC 94 ms 5260 KB
random_08.txt AC 10 ms 3704 KB
random_09.txt AC 98 ms 5240 KB
random_10.txt AC 43 ms 4400 KB
random_11.txt AC 96 ms 5196 KB
random_12.txt AC 96 ms 5296 KB
random_14.txt AC 61 ms 4644 KB
random_15.txt AC 101 ms 5188 KB
random_16.txt AC 47 ms 4392 KB
sample_01.txt AC 2 ms 3768 KB
sample_02.txt AC 2 ms 3700 KB
sample_03.txt AC 2 ms 3608 KB
sample_04.txt AC 96 ms 5312 KB
unreachable_01.txt AC 2 ms 3496 KB
unreachable_02.txt AC 2 ms 3572 KB
unreachable_03.txt AC 3 ms 3476 KB
unreachable_04.txt AC 2 ms 3468 KB