| # |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
| 27848 |
2017-07-14T08:12:27 Z |
김동현(#1158) |
Sparklers (JOI17_sparklers) |
C++14 |
|
133 ms |
18456 KB |
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
const ll inf = 1e18;
int n, k;
ll x[100010], t, s[1001][1001], e[1001][1001];
void f(ll &ns, ll &ne, ll ts, ll te, ll cnt, ll cur, ll v){
ts -= v * t; te += v * t;
ll cs = x[cur] - v * cnt * t, ce = x[cur] + v * cnt * t;
cs = max(cs, ts);
ce = min(ce, te);
if(cs <= ce){
ns = cs;
ne = ce;
}
}
int can(ll v){
for(int i = 1; i <= n; i++){
fill(s[i] + 1, s[i] + n + 1, inf);
fill(e[i] + 1, e[i] + n + 1, -inf);
}
s[k][k] = e[k][k] = x[k];
for(int l = k; l >= 1; l--){
for(int r = k + (l == k); r <= n; r++){
f(s[l][r], e[l][r], s[l + 1][r], e[l + 1][r], r - l, l, v);
f(s[l][r], e[l][r], s[l][r - 1], e[l][r - 1], r - l, r, v);
}
}
return s[1][n] <= e[1][n];
}
int main(){
scanf("%d%d%lld", &n, &k, &t);
for(int i = 1; i <= n; i++) scanf("%lld", x + i);
ll s = 0, e = 2 * ((ll(1e9) + t - 1) / t);
for(ll m; s <= e; ){
m = (s + e) / 2;
if(can(m)) e = m - 1;
else s = m + 1;
}
printf("%lld\n", s);
}
Compilation message
sparklers.cpp: In function 'int main()':
sparklers.cpp:36:31: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%d%d%lld", &n, &k, &t);
^
sparklers.cpp:37:50: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
for(int i = 1; i <= n; i++) scanf("%lld", x + i);
^
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
18456 KB |
Output is correct |
| 2 |
Correct |
0 ms |
18456 KB |
Output is correct |
| 3 |
Correct |
0 ms |
18456 KB |
Output is correct |
| 4 |
Correct |
0 ms |
18456 KB |
Output is correct |
| 5 |
Correct |
0 ms |
18456 KB |
Output is correct |
| 6 |
Correct |
0 ms |
18456 KB |
Output is correct |
| 7 |
Correct |
0 ms |
18456 KB |
Output is correct |
| 8 |
Correct |
0 ms |
18456 KB |
Output is correct |
| 9 |
Correct |
0 ms |
18456 KB |
Output is correct |
| 10 |
Correct |
0 ms |
18456 KB |
Output is correct |
| 11 |
Correct |
0 ms |
18456 KB |
Output is correct |
| 12 |
Correct |
0 ms |
18456 KB |
Output is correct |
| 13 |
Correct |
0 ms |
18456 KB |
Output is correct |
| 14 |
Correct |
0 ms |
18456 KB |
Output is correct |
| 15 |
Correct |
0 ms |
18456 KB |
Output is correct |
| 16 |
Correct |
0 ms |
18456 KB |
Output is correct |
| 17 |
Correct |
0 ms |
18456 KB |
Output is correct |
| 18 |
Correct |
0 ms |
18456 KB |
Output is correct |
| 19 |
Correct |
0 ms |
18456 KB |
Output is correct |
| 20 |
Correct |
0 ms |
18456 KB |
Output is correct |
| 21 |
Correct |
0 ms |
18456 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
18456 KB |
Output is correct |
| 2 |
Correct |
0 ms |
18456 KB |
Output is correct |
| 3 |
Correct |
0 ms |
18456 KB |
Output is correct |
| 4 |
Correct |
0 ms |
18456 KB |
Output is correct |
| 5 |
Correct |
0 ms |
18456 KB |
Output is correct |
| 6 |
Correct |
0 ms |
18456 KB |
Output is correct |
| 7 |
Correct |
0 ms |
18456 KB |
Output is correct |
| 8 |
Correct |
0 ms |
18456 KB |
Output is correct |
| 9 |
Correct |
0 ms |
18456 KB |
Output is correct |
| 10 |
Correct |
0 ms |
18456 KB |
Output is correct |
| 11 |
Correct |
0 ms |
18456 KB |
Output is correct |
| 12 |
Correct |
0 ms |
18456 KB |
Output is correct |
| 13 |
Correct |
0 ms |
18456 KB |
Output is correct |
| 14 |
Correct |
0 ms |
18456 KB |
Output is correct |
| 15 |
Correct |
0 ms |
18456 KB |
Output is correct |
| 16 |
Correct |
0 ms |
18456 KB |
Output is correct |
| 17 |
Correct |
0 ms |
18456 KB |
Output is correct |
| 18 |
Correct |
0 ms |
18456 KB |
Output is correct |
| 19 |
Correct |
0 ms |
18456 KB |
Output is correct |
| 20 |
Correct |
0 ms |
18456 KB |
Output is correct |
| 21 |
Correct |
0 ms |
18456 KB |
Output is correct |
| 22 |
Correct |
59 ms |
18456 KB |
Output is correct |
| 23 |
Correct |
23 ms |
18456 KB |
Output is correct |
| 24 |
Correct |
39 ms |
18456 KB |
Output is correct |
| 25 |
Correct |
76 ms |
18456 KB |
Output is correct |
| 26 |
Correct |
113 ms |
18456 KB |
Output is correct |
| 27 |
Correct |
113 ms |
18456 KB |
Output is correct |
| 28 |
Correct |
116 ms |
18456 KB |
Output is correct |
| 29 |
Correct |
123 ms |
18456 KB |
Output is correct |
| 30 |
Correct |
123 ms |
18456 KB |
Output is correct |
| 31 |
Correct |
133 ms |
18456 KB |
Output is correct |
| 32 |
Correct |
123 ms |
18456 KB |
Output is correct |
| 33 |
Correct |
129 ms |
18456 KB |
Output is correct |
| 34 |
Correct |
106 ms |
18456 KB |
Output is correct |
| 35 |
Correct |
126 ms |
18456 KB |
Output is correct |
| 36 |
Correct |
96 ms |
18456 KB |
Output is correct |
| 37 |
Correct |
89 ms |
18456 KB |
Output is correct |
| 38 |
Correct |
106 ms |
18456 KB |
Output is correct |
| 39 |
Correct |
86 ms |
18456 KB |
Output is correct |
| 40 |
Correct |
113 ms |
18456 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
18456 KB |
Output is correct |
| 2 |
Correct |
0 ms |
18456 KB |
Output is correct |
| 3 |
Correct |
0 ms |
18456 KB |
Output is correct |
| 4 |
Correct |
0 ms |
18456 KB |
Output is correct |
| 5 |
Correct |
0 ms |
18456 KB |
Output is correct |
| 6 |
Correct |
0 ms |
18456 KB |
Output is correct |
| 7 |
Correct |
0 ms |
18456 KB |
Output is correct |
| 8 |
Correct |
0 ms |
18456 KB |
Output is correct |
| 9 |
Correct |
0 ms |
18456 KB |
Output is correct |
| 10 |
Correct |
0 ms |
18456 KB |
Output is correct |
| 11 |
Correct |
0 ms |
18456 KB |
Output is correct |
| 12 |
Correct |
0 ms |
18456 KB |
Output is correct |
| 13 |
Correct |
0 ms |
18456 KB |
Output is correct |
| 14 |
Correct |
0 ms |
18456 KB |
Output is correct |
| 15 |
Correct |
0 ms |
18456 KB |
Output is correct |
| 16 |
Correct |
0 ms |
18456 KB |
Output is correct |
| 17 |
Correct |
0 ms |
18456 KB |
Output is correct |
| 18 |
Correct |
0 ms |
18456 KB |
Output is correct |
| 19 |
Correct |
0 ms |
18456 KB |
Output is correct |
| 20 |
Correct |
0 ms |
18456 KB |
Output is correct |
| 21 |
Correct |
0 ms |
18456 KB |
Output is correct |
| 22 |
Correct |
59 ms |
18456 KB |
Output is correct |
| 23 |
Correct |
23 ms |
18456 KB |
Output is correct |
| 24 |
Correct |
39 ms |
18456 KB |
Output is correct |
| 25 |
Correct |
76 ms |
18456 KB |
Output is correct |
| 26 |
Correct |
113 ms |
18456 KB |
Output is correct |
| 27 |
Correct |
113 ms |
18456 KB |
Output is correct |
| 28 |
Correct |
116 ms |
18456 KB |
Output is correct |
| 29 |
Correct |
123 ms |
18456 KB |
Output is correct |
| 30 |
Correct |
123 ms |
18456 KB |
Output is correct |
| 31 |
Correct |
133 ms |
18456 KB |
Output is correct |
| 32 |
Correct |
123 ms |
18456 KB |
Output is correct |
| 33 |
Correct |
129 ms |
18456 KB |
Output is correct |
| 34 |
Correct |
106 ms |
18456 KB |
Output is correct |
| 35 |
Correct |
126 ms |
18456 KB |
Output is correct |
| 36 |
Correct |
96 ms |
18456 KB |
Output is correct |
| 37 |
Correct |
89 ms |
18456 KB |
Output is correct |
| 38 |
Correct |
106 ms |
18456 KB |
Output is correct |
| 39 |
Correct |
86 ms |
18456 KB |
Output is correct |
| 40 |
Correct |
113 ms |
18456 KB |
Output is correct |
| 41 |
Runtime error |
86 ms |
18456 KB |
Execution killed with signal 11 (could be triggered by violating memory limits) |
| 42 |
Halted |
0 ms |
0 KB |
- |
