답안 #27854 :: oj.uz

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
27854	2017-07-14T08:43:33 Z	시제연(#1161)	Sparklers (JOI17_sparklers)	C++	50 / 100	213 ms	20932 KB

sparklers

#include <bits/stdc++.h>

using namespace std;

typedef long long ll;
typedef pair<ll,ll> pll;
ll n, k, t, INF = 1LL<<60;
ll x[1100];
pll ran[1100][1100];

pll gyo(pll a, pll b) {
	ll s = max(a.first,b.first), e = min(a.second,b.second);
	if (s>e) return pll(INF,-INF);
	return pll(s,e);
}

pll hap(pll a, pll b) {
	return pll(min(a.first,b.first),max(a.second,b.second));
}

pll epn(pll a, ll k) {
	return pll(a.first-k,a.second+k);
}

bool ok(ll d) {
	int s, e, r;
	for (r=0;r<n;r++) {
		for (s=0;s<n-r;s++) {
			e = s+r;
			if (s>k||e<k) {
				ran[s][e] = pll(INF,-INF);
				continue;
			}
			if (s==e) {
				ran[s][s] = pll(x[k],x[k]);
				continue;
			}
			ran[s][e] = gyo(pll(0,1e9),hap(gyo(pll(x[s]-d*t*(e-s),x[s]+d*t*(e-s)),epn(ran[s+1][e],d*t)),
									   gyo(pll(x[e]-d*t*(e-s),x[e]+d*t*(e-s)),epn(ran[s][e-1],d*t))));
			//printf("%d, %d : %lld~%lld\n",s,e,ran[s][e].first,ran[s][e].second);
		}
	}
	return ran[0][n-1].first<=1e9+10;
}

int main() {
	int i;

	scanf("%lld%lld%lld",&n,&k,&t); k--;
	for (i=0;i<n;i++) scanf("%lld",&x[i]);
	ll s = 0, e = (1e9+10)/max(n-1,1LL);
	while(s<=e) {
		ll m = (s+e)>>1;
		if (ok(m)) e = m-1;
		else s = m+1;
	}
	printf("%lld\n",s);

    return 0;
}

Compilation message

sparklers.cpp: In function 'int main()':
sparklers.cpp:49:32: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%lld%lld%lld",&n,&k,&t); k--;
                                ^
sparklers.cpp:50:39: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  for (i=0;i<n;i++) scanf("%lld",&x[i]);
                                       ^

Subtask #1
30.0 / 30.0

#	결과	실행 시간	메모리	Grader output
1	Correct	6 ms	20932 KB	Output is correct
2	Correct	3 ms	20932 KB	Output is correct
3	Correct	6 ms	20932 KB	Output is correct
4	Correct	0 ms	20932 KB	Output is correct
5	Correct	6 ms	20932 KB	Output is correct
6	Correct	0 ms	20932 KB	Output is correct
7	Correct	3 ms	20932 KB	Output is correct
8	Correct	0 ms	20932 KB	Output is correct
9	Correct	3 ms	20932 KB	Output is correct
10	Correct	3 ms	20932 KB	Output is correct
11	Correct	0 ms	20932 KB	Output is correct
12	Correct	0 ms	20932 KB	Output is correct
13	Correct	3 ms	20932 KB	Output is correct
14	Correct	3 ms	20932 KB	Output is correct
15	Correct	3 ms	20932 KB	Output is correct
16	Correct	6 ms	20932 KB	Output is correct
17	Correct	3 ms	20932 KB	Output is correct
18	Correct	0 ms	20932 KB	Output is correct
19	Correct	0 ms	20932 KB	Output is correct
20	Correct	0 ms	20932 KB	Output is correct
21	Correct	3 ms	20932 KB	Output is correct

Subtask #2
20.0 / 20.0

#	결과	실행 시간	메모리	Grader output
1	Correct	6 ms	20932 KB	Output is correct
2	Correct	3 ms	20932 KB	Output is correct
3	Correct	6 ms	20932 KB	Output is correct
4	Correct	0 ms	20932 KB	Output is correct
5	Correct	6 ms	20932 KB	Output is correct
6	Correct	0 ms	20932 KB	Output is correct
7	Correct	3 ms	20932 KB	Output is correct
8	Correct	0 ms	20932 KB	Output is correct
9	Correct	3 ms	20932 KB	Output is correct
10	Correct	3 ms	20932 KB	Output is correct
11	Correct	0 ms	20932 KB	Output is correct
12	Correct	0 ms	20932 KB	Output is correct
13	Correct	3 ms	20932 KB	Output is correct
14	Correct	3 ms	20932 KB	Output is correct
15	Correct	3 ms	20932 KB	Output is correct
16	Correct	6 ms	20932 KB	Output is correct
17	Correct	3 ms	20932 KB	Output is correct
18	Correct	0 ms	20932 KB	Output is correct
19	Correct	0 ms	20932 KB	Output is correct
20	Correct	0 ms	20932 KB	Output is correct
21	Correct	3 ms	20932 KB	Output is correct
22	Correct	69 ms	20932 KB	Output is correct
23	Correct	33 ms	20932 KB	Output is correct
24	Correct	103 ms	20932 KB	Output is correct
25	Correct	213 ms	20932 KB	Output is correct
26	Correct	186 ms	20932 KB	Output is correct
27	Correct	173 ms	20932 KB	Output is correct
28	Correct	143 ms	20932 KB	Output is correct
29	Correct	139 ms	20932 KB	Output is correct
30	Correct	176 ms	20932 KB	Output is correct
31	Correct	139 ms	20932 KB	Output is correct
32	Correct	139 ms	20932 KB	Output is correct
33	Correct	149 ms	20932 KB	Output is correct
34	Correct	176 ms	20932 KB	Output is correct
35	Correct	146 ms	20932 KB	Output is correct
36	Correct	186 ms	20932 KB	Output is correct
37	Correct	206 ms	20932 KB	Output is correct
38	Correct	146 ms	20932 KB	Output is correct
39	Correct	203 ms	20932 KB	Output is correct
40	Correct	66 ms	20932 KB	Output is correct

Subtask #3
0 / 50.0

#	결과	실행 시간	메모리	Grader output
1	Correct	6 ms	20932 KB	Output is correct
2	Correct	3 ms	20932 KB	Output is correct
3	Correct	6 ms	20932 KB	Output is correct
4	Correct	0 ms	20932 KB	Output is correct
5	Correct	6 ms	20932 KB	Output is correct
6	Correct	0 ms	20932 KB	Output is correct
7	Correct	3 ms	20932 KB	Output is correct
8	Correct	0 ms	20932 KB	Output is correct
9	Correct	3 ms	20932 KB	Output is correct
10	Correct	3 ms	20932 KB	Output is correct
11	Correct	0 ms	20932 KB	Output is correct
12	Correct	0 ms	20932 KB	Output is correct
13	Correct	3 ms	20932 KB	Output is correct
14	Correct	3 ms	20932 KB	Output is correct
15	Correct	3 ms	20932 KB	Output is correct
16	Correct	6 ms	20932 KB	Output is correct
17	Correct	3 ms	20932 KB	Output is correct
18	Correct	0 ms	20932 KB	Output is correct
19	Correct	0 ms	20932 KB	Output is correct
20	Correct	0 ms	20932 KB	Output is correct
21	Correct	3 ms	20932 KB	Output is correct
22	Correct	69 ms	20932 KB	Output is correct
23	Correct	33 ms	20932 KB	Output is correct
24	Correct	103 ms	20932 KB	Output is correct
25	Correct	213 ms	20932 KB	Output is correct
26	Correct	186 ms	20932 KB	Output is correct
27	Correct	173 ms	20932 KB	Output is correct
28	Correct	143 ms	20932 KB	Output is correct
29	Correct	139 ms	20932 KB	Output is correct
30	Correct	176 ms	20932 KB	Output is correct
31	Correct	139 ms	20932 KB	Output is correct
32	Correct	139 ms	20932 KB	Output is correct
33	Correct	149 ms	20932 KB	Output is correct
34	Correct	176 ms	20932 KB	Output is correct
35	Correct	146 ms	20932 KB	Output is correct
36	Correct	186 ms	20932 KB	Output is correct
37	Correct	206 ms	20932 KB	Output is correct
38	Correct	146 ms	20932 KB	Output is correct
39	Correct	203 ms	20932 KB	Output is correct
40	Correct	66 ms	20932 KB	Output is correct
41	Runtime error	3 ms	20932 KB	Execution killed because of forbidden syscall futex (202)
42	Halted	0 ms	0 KB	-

답안 #27854

Compilation message

Subtask #1 30.0 / 30.0

Subtask #2 20.0 / 20.0

Subtask #3 0 / 50.0

Subtask #1
30.0 / 30.0

Subtask #2
20.0 / 20.0

Subtask #3
0 / 50.0