| # |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
| 581754 |
2022-06-23T05:46:35 Z |
반딧불(#8365) |
Sparklers (JOI17_sparklers) |
C++17 |
|
36 ms |
4148 KB |
/*#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
int n, k;
ll t;
ll arr[100002];
bool able(ll speed){
speed*=t;
int l = k, r = k;
ll s = arr[k], e = arr[k];
for(int cnt=1; cnt<n; cnt++){
ll lDist = (s - speed) - (arr[l-1] + speed*cnt);
ll rDist = (arr[r+1] - speed*cnt) - (e + speed);
if(min(lDist, rDist) > 0) return false;
if(lDist < rDist){
l--;
s = s - speed;
e = min(arr[l] + speed*cnt, e+speed);
}
else{
r++;
s = max(arr[r] - speed*cnt, s-speed);
e = e + speed;
}
}
return true;
}
int main(){
scanf("%d %d %lld", &n, &k, &t);
for(int i=1; i<=n; i++) scanf("%lld", &arr[i]);
arr[0] = -1e18, arr[n+1] = 1e18;
if(arr[1] == arr[n]){
puts("0");
return 0;
}
ll L = 1, R = 1e9, ANS = 1e9;
while(L<=R){
ll MID = (L+R)/2;
if(able(MID)) ANS = MID, R = MID-1;
else L = MID+1;
}
printf("%lld", ANS);
}
*/
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
int n, k;
ll t;
ll arr[100002];
bool DP[1002][1002];
ll able(ll speed){
speed*=t;
memset(DP, 0, sizeof(DP));
DP[k][k] = true;
for(int d=1; d<n; d++){
for(int i=1; i+d<=n; i++){
int j = i+d;
if((DP[i+1][j] || DP[i][j-1]) && (arr[j] - arr[i] <= speed*d*2)) DP[i][j] = true;
}
}
return DP[1][n];
}
int main(){
scanf("%d %d %lld", &n, &k, &t);
for(int i=1; i<=n; i++) scanf("%lld", &arr[i]);
if(arr[1] == arr[n]){
puts("0");
return 0;
}
ll L = 1, R = 1e9, ANS = 1e9;
while(L<=R){
ll MID = (L+R)/2;
if(able(MID)) ANS = MID, R = MID-1;
else L = MID+1;
}
printf("%lld", ANS);
}
Compilation message
sparklers.cpp: In function 'int main()':
sparklers.cpp:77:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
77 | scanf("%d %d %lld", &n, &k, &t);
| ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~
sparklers.cpp:78:34: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
78 | for(int i=1; i<=n; i++) scanf("%lld", &arr[i]);
| ~~~~~^~~~~~~~~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
2 ms |
1236 KB |
Output is correct |
| 2 |
Correct |
2 ms |
1236 KB |
Output is correct |
| 3 |
Correct |
2 ms |
1236 KB |
Output is correct |
| 4 |
Correct |
2 ms |
1236 KB |
Output is correct |
| 5 |
Correct |
2 ms |
1236 KB |
Output is correct |
| 6 |
Correct |
2 ms |
1236 KB |
Output is correct |
| 7 |
Correct |
2 ms |
1236 KB |
Output is correct |
| 8 |
Correct |
2 ms |
1208 KB |
Output is correct |
| 9 |
Correct |
1 ms |
1236 KB |
Output is correct |
| 10 |
Correct |
2 ms |
1236 KB |
Output is correct |
| 11 |
Correct |
2 ms |
1236 KB |
Output is correct |
| 12 |
Correct |
2 ms |
1236 KB |
Output is correct |
| 13 |
Correct |
2 ms |
1236 KB |
Output is correct |
| 14 |
Correct |
2 ms |
1204 KB |
Output is correct |
| 15 |
Correct |
2 ms |
1208 KB |
Output is correct |
| 16 |
Correct |
2 ms |
1208 KB |
Output is correct |
| 17 |
Correct |
2 ms |
1236 KB |
Output is correct |
| 18 |
Correct |
2 ms |
1208 KB |
Output is correct |
| 19 |
Correct |
1 ms |
212 KB |
Output is correct |
| 20 |
Correct |
2 ms |
1208 KB |
Output is correct |
| 21 |
Correct |
0 ms |
212 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
2 ms |
1236 KB |
Output is correct |
| 2 |
Correct |
2 ms |
1236 KB |
Output is correct |
| 3 |
Correct |
2 ms |
1236 KB |
Output is correct |
| 4 |
Correct |
2 ms |
1236 KB |
Output is correct |
| 5 |
Correct |
2 ms |
1236 KB |
Output is correct |
| 6 |
Correct |
2 ms |
1236 KB |
Output is correct |
| 7 |
Correct |
2 ms |
1236 KB |
Output is correct |
| 8 |
Correct |
2 ms |
1208 KB |
Output is correct |
| 9 |
Correct |
1 ms |
1236 KB |
Output is correct |
| 10 |
Correct |
2 ms |
1236 KB |
Output is correct |
| 11 |
Correct |
2 ms |
1236 KB |
Output is correct |
| 12 |
Correct |
2 ms |
1236 KB |
Output is correct |
| 13 |
Correct |
2 ms |
1236 KB |
Output is correct |
| 14 |
Correct |
2 ms |
1204 KB |
Output is correct |
| 15 |
Correct |
2 ms |
1208 KB |
Output is correct |
| 16 |
Correct |
2 ms |
1208 KB |
Output is correct |
| 17 |
Correct |
2 ms |
1236 KB |
Output is correct |
| 18 |
Correct |
2 ms |
1208 KB |
Output is correct |
| 19 |
Correct |
1 ms |
212 KB |
Output is correct |
| 20 |
Correct |
2 ms |
1208 KB |
Output is correct |
| 21 |
Correct |
0 ms |
212 KB |
Output is correct |
| 22 |
Correct |
14 ms |
1216 KB |
Output is correct |
| 23 |
Correct |
9 ms |
1236 KB |
Output is correct |
| 24 |
Correct |
14 ms |
1236 KB |
Output is correct |
| 25 |
Correct |
27 ms |
1308 KB |
Output is correct |
| 26 |
Correct |
27 ms |
1236 KB |
Output is correct |
| 27 |
Correct |
25 ms |
1236 KB |
Output is correct |
| 28 |
Correct |
24 ms |
1308 KB |
Output is correct |
| 29 |
Correct |
24 ms |
1308 KB |
Output is correct |
| 30 |
Correct |
26 ms |
1236 KB |
Output is correct |
| 31 |
Correct |
23 ms |
1236 KB |
Output is correct |
| 32 |
Correct |
27 ms |
1236 KB |
Output is correct |
| 33 |
Correct |
25 ms |
1212 KB |
Output is correct |
| 34 |
Correct |
29 ms |
1236 KB |
Output is correct |
| 35 |
Correct |
36 ms |
1236 KB |
Output is correct |
| 36 |
Correct |
26 ms |
1308 KB |
Output is correct |
| 37 |
Correct |
25 ms |
1236 KB |
Output is correct |
| 38 |
Correct |
23 ms |
1236 KB |
Output is correct |
| 39 |
Correct |
28 ms |
1236 KB |
Output is correct |
| 40 |
Correct |
1 ms |
212 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
2 ms |
1236 KB |
Output is correct |
| 2 |
Correct |
2 ms |
1236 KB |
Output is correct |
| 3 |
Correct |
2 ms |
1236 KB |
Output is correct |
| 4 |
Correct |
2 ms |
1236 KB |
Output is correct |
| 5 |
Correct |
2 ms |
1236 KB |
Output is correct |
| 6 |
Correct |
2 ms |
1236 KB |
Output is correct |
| 7 |
Correct |
2 ms |
1236 KB |
Output is correct |
| 8 |
Correct |
2 ms |
1208 KB |
Output is correct |
| 9 |
Correct |
1 ms |
1236 KB |
Output is correct |
| 10 |
Correct |
2 ms |
1236 KB |
Output is correct |
| 11 |
Correct |
2 ms |
1236 KB |
Output is correct |
| 12 |
Correct |
2 ms |
1236 KB |
Output is correct |
| 13 |
Correct |
2 ms |
1236 KB |
Output is correct |
| 14 |
Correct |
2 ms |
1204 KB |
Output is correct |
| 15 |
Correct |
2 ms |
1208 KB |
Output is correct |
| 16 |
Correct |
2 ms |
1208 KB |
Output is correct |
| 17 |
Correct |
2 ms |
1236 KB |
Output is correct |
| 18 |
Correct |
2 ms |
1208 KB |
Output is correct |
| 19 |
Correct |
1 ms |
212 KB |
Output is correct |
| 20 |
Correct |
2 ms |
1208 KB |
Output is correct |
| 21 |
Correct |
0 ms |
212 KB |
Output is correct |
| 22 |
Correct |
14 ms |
1216 KB |
Output is correct |
| 23 |
Correct |
9 ms |
1236 KB |
Output is correct |
| 24 |
Correct |
14 ms |
1236 KB |
Output is correct |
| 25 |
Correct |
27 ms |
1308 KB |
Output is correct |
| 26 |
Correct |
27 ms |
1236 KB |
Output is correct |
| 27 |
Correct |
25 ms |
1236 KB |
Output is correct |
| 28 |
Correct |
24 ms |
1308 KB |
Output is correct |
| 29 |
Correct |
24 ms |
1308 KB |
Output is correct |
| 30 |
Correct |
26 ms |
1236 KB |
Output is correct |
| 31 |
Correct |
23 ms |
1236 KB |
Output is correct |
| 32 |
Correct |
27 ms |
1236 KB |
Output is correct |
| 33 |
Correct |
25 ms |
1212 KB |
Output is correct |
| 34 |
Correct |
29 ms |
1236 KB |
Output is correct |
| 35 |
Correct |
36 ms |
1236 KB |
Output is correct |
| 36 |
Correct |
26 ms |
1308 KB |
Output is correct |
| 37 |
Correct |
25 ms |
1236 KB |
Output is correct |
| 38 |
Correct |
23 ms |
1236 KB |
Output is correct |
| 39 |
Correct |
28 ms |
1236 KB |
Output is correct |
| 40 |
Correct |
1 ms |
212 KB |
Output is correct |
| 41 |
Runtime error |
10 ms |
4148 KB |
Execution killed with signal 11 |
| 42 |
Halted |
0 ms |
0 KB |
- |
