#include<bits/stdc++.h>
#define ll long long
const ll inf=1e18;
using namespace std;
ll t,x[100005],dp[100005];
int n,k;
bool calc(ll nr)
{
nr=nr*2;
if (t*nr>(ll)1e9)
return 1;
int i;
for(i=1;i<=n;i++)
dp[i]=x[i]-i*t*nr;
int st=1,dr=n;
for(i=1;i<=k;i++)
if (dp[st]<=dp[i])
st=i;
for(i=k;i<=n;i++)
if (dp[dr]>=dp[i])
dr=i;
int l=k,r=k;
ll v1=dp[l],v2=dp[r];
while(st<=l || r<=dr){
int auxl=l,auxr=r;
while(l>=st && dp[l]>=v2){
v1=max(v1,dp[l]);
l--;
}
while(r<=dr && dp[r]<=v1){
v2=min(v2,dp[r]);
r++;
}
if (l==auxl && r==auxr)
return 0;
}
l=1;
r=n;
v1=dp[l];
v2=dp[r];
while(l<=st || dr<=r){
int auxl=l,auxr=r;
while(l<=st && dp[l]>=v2){
v1=max(v1,dp[l]);
l++;
}
while(r>=dr && dp[r]<=v1){
v2=min(v2,dp[r]);
r--;
}
if (l==auxl && r==auxr)
return 0;
}
return 1;
}
int main()
{
//freopen(".in","r",stdin);
//freopen(".out","w",stdout);
scanf("%d%d%lld",&n,&k,&t);
int i;
for(i=1;i<=n;i++)
scanf("%lld",&x[i]);
ll st=0,dr=1e9,mij,last;
while(st<=dr){
mij=(st+dr)/2;
if (calc(mij)){
last=mij;
dr=mij-1;
}
else
st=mij+1;
}
printf("%lld\n",last);
return 0;
}
Compilation message
sparklers.cpp: In function 'int main()':
sparklers.cpp:60:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
60 | scanf("%d%d%lld",&n,&k,&t);
| ~~~~~^~~~~~~~~~~~~~~~~~~~~
sparklers.cpp:63:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
63 | scanf("%lld",&x[i]);
| ~~~~~^~~~~~~~~~~~~~
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
492 KB |
Output is correct |
| 2 |
Correct |
1 ms |
364 KB |
Output is correct |
| 3 |
Correct |
1 ms |
364 KB |
Output is correct |
| 4 |
Correct |
1 ms |
364 KB |
Output is correct |
| 5 |
Correct |
1 ms |
364 KB |
Output is correct |
| 6 |
Correct |
1 ms |
364 KB |
Output is correct |
| 7 |
Correct |
1 ms |
364 KB |
Output is correct |
| 8 |
Correct |
1 ms |
364 KB |
Output is correct |
| 9 |
Correct |
1 ms |
364 KB |
Output is correct |
| 10 |
Correct |
1 ms |
364 KB |
Output is correct |
| 11 |
Correct |
1 ms |
364 KB |
Output is correct |
| 12 |
Correct |
1 ms |
364 KB |
Output is correct |
| 13 |
Correct |
1 ms |
364 KB |
Output is correct |
| 14 |
Correct |
1 ms |
364 KB |
Output is correct |
| 15 |
Correct |
1 ms |
364 KB |
Output is correct |
| 16 |
Correct |
1 ms |
364 KB |
Output is correct |
| 17 |
Correct |
1 ms |
364 KB |
Output is correct |
| 18 |
Correct |
1 ms |
364 KB |
Output is correct |
| 19 |
Correct |
1 ms |
364 KB |
Output is correct |
| 20 |
Correct |
1 ms |
364 KB |
Output is correct |
| 21 |
Correct |
1 ms |
364 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
492 KB |
Output is correct |
| 2 |
Correct |
1 ms |
364 KB |
Output is correct |
| 3 |
Correct |
1 ms |
364 KB |
Output is correct |
| 4 |
Correct |
1 ms |
364 KB |
Output is correct |
| 5 |
Correct |
1 ms |
364 KB |
Output is correct |
| 6 |
Correct |
1 ms |
364 KB |
Output is correct |
| 7 |
Correct |
1 ms |
364 KB |
Output is correct |
| 8 |
Correct |
1 ms |
364 KB |
Output is correct |
| 9 |
Correct |
1 ms |
364 KB |
Output is correct |
| 10 |
Correct |
1 ms |
364 KB |
Output is correct |
| 11 |
Correct |
1 ms |
364 KB |
Output is correct |
| 12 |
Correct |
1 ms |
364 KB |
Output is correct |
| 13 |
Correct |
1 ms |
364 KB |
Output is correct |
| 14 |
Correct |
1 ms |
364 KB |
Output is correct |
| 15 |
Correct |
1 ms |
364 KB |
Output is correct |
| 16 |
Correct |
1 ms |
364 KB |
Output is correct |
| 17 |
Correct |
1 ms |
364 KB |
Output is correct |
| 18 |
Correct |
1 ms |
364 KB |
Output is correct |
| 19 |
Correct |
1 ms |
364 KB |
Output is correct |
| 20 |
Correct |
1 ms |
364 KB |
Output is correct |
| 21 |
Correct |
1 ms |
364 KB |
Output is correct |
| 22 |
Correct |
1 ms |
384 KB |
Output is correct |
| 23 |
Correct |
1 ms |
364 KB |
Output is correct |
| 24 |
Correct |
1 ms |
364 KB |
Output is correct |
| 25 |
Correct |
1 ms |
364 KB |
Output is correct |
| 26 |
Correct |
1 ms |
364 KB |
Output is correct |
| 27 |
Correct |
1 ms |
364 KB |
Output is correct |
| 28 |
Correct |
1 ms |
364 KB |
Output is correct |
| 29 |
Correct |
1 ms |
364 KB |
Output is correct |
| 30 |
Correct |
1 ms |
364 KB |
Output is correct |
| 31 |
Correct |
1 ms |
364 KB |
Output is correct |
| 32 |
Correct |
1 ms |
364 KB |
Output is correct |
| 33 |
Correct |
1 ms |
364 KB |
Output is correct |
| 34 |
Correct |
1 ms |
364 KB |
Output is correct |
| 35 |
Correct |
1 ms |
364 KB |
Output is correct |
| 36 |
Correct |
1 ms |
364 KB |
Output is correct |
| 37 |
Correct |
1 ms |
364 KB |
Output is correct |
| 38 |
Correct |
1 ms |
364 KB |
Output is correct |
| 39 |
Correct |
1 ms |
364 KB |
Output is correct |
| 40 |
Correct |
1 ms |
364 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
492 KB |
Output is correct |
| 2 |
Correct |
1 ms |
364 KB |
Output is correct |
| 3 |
Correct |
1 ms |
364 KB |
Output is correct |
| 4 |
Correct |
1 ms |
364 KB |
Output is correct |
| 5 |
Correct |
1 ms |
364 KB |
Output is correct |
| 6 |
Correct |
1 ms |
364 KB |
Output is correct |
| 7 |
Correct |
1 ms |
364 KB |
Output is correct |
| 8 |
Correct |
1 ms |
364 KB |
Output is correct |
| 9 |
Correct |
1 ms |
364 KB |
Output is correct |
| 10 |
Correct |
1 ms |
364 KB |
Output is correct |
| 11 |
Correct |
1 ms |
364 KB |
Output is correct |
| 12 |
Correct |
1 ms |
364 KB |
Output is correct |
| 13 |
Correct |
1 ms |
364 KB |
Output is correct |
| 14 |
Correct |
1 ms |
364 KB |
Output is correct |
| 15 |
Correct |
1 ms |
364 KB |
Output is correct |
| 16 |
Correct |
1 ms |
364 KB |
Output is correct |
| 17 |
Correct |
1 ms |
364 KB |
Output is correct |
| 18 |
Correct |
1 ms |
364 KB |
Output is correct |
| 19 |
Correct |
1 ms |
364 KB |
Output is correct |
| 20 |
Correct |
1 ms |
364 KB |
Output is correct |
| 21 |
Correct |
1 ms |
364 KB |
Output is correct |
| 22 |
Correct |
1 ms |
384 KB |
Output is correct |
| 23 |
Correct |
1 ms |
364 KB |
Output is correct |
| 24 |
Correct |
1 ms |
364 KB |
Output is correct |
| 25 |
Correct |
1 ms |
364 KB |
Output is correct |
| 26 |
Correct |
1 ms |
364 KB |
Output is correct |
| 27 |
Correct |
1 ms |
364 KB |
Output is correct |
| 28 |
Correct |
1 ms |
364 KB |
Output is correct |
| 29 |
Correct |
1 ms |
364 KB |
Output is correct |
| 30 |
Correct |
1 ms |
364 KB |
Output is correct |
| 31 |
Correct |
1 ms |
364 KB |
Output is correct |
| 32 |
Correct |
1 ms |
364 KB |
Output is correct |
| 33 |
Correct |
1 ms |
364 KB |
Output is correct |
| 34 |
Correct |
1 ms |
364 KB |
Output is correct |
| 35 |
Correct |
1 ms |
364 KB |
Output is correct |
| 36 |
Correct |
1 ms |
364 KB |
Output is correct |
| 37 |
Correct |
1 ms |
364 KB |
Output is correct |
| 38 |
Correct |
1 ms |
364 KB |
Output is correct |
| 39 |
Correct |
1 ms |
364 KB |
Output is correct |
| 40 |
Correct |
1 ms |
364 KB |
Output is correct |
| 41 |
Correct |
22 ms |
2028 KB |
Output is correct |
| 42 |
Correct |
1 ms |
364 KB |
Output is correct |
| 43 |
Correct |
6 ms |
748 KB |
Output is correct |
| 44 |
Correct |
34 ms |
2796 KB |
Output is correct |
| 45 |
Correct |
30 ms |
2796 KB |
Output is correct |
| 46 |
Correct |
30 ms |
2796 KB |
Output is correct |
| 47 |
Correct |
32 ms |
2796 KB |
Output is correct |
| 48 |
Correct |
31 ms |
2796 KB |
Output is correct |
| 49 |
Correct |
43 ms |
2796 KB |
Output is correct |
| 50 |
Correct |
32 ms |
2796 KB |
Output is correct |
| 51 |
Correct |
31 ms |
2924 KB |
Output is correct |
| 52 |
Correct |
30 ms |
2924 KB |
Output is correct |
| 53 |
Correct |
41 ms |
2924 KB |
Output is correct |
| 54 |
Correct |
32 ms |
2800 KB |
Output is correct |
| 55 |
Correct |
42 ms |
2796 KB |
Output is correct |
| 56 |
Correct |
30 ms |
2796 KB |
Output is correct |
| 57 |
Correct |
30 ms |
2796 KB |
Output is correct |
| 58 |
Correct |
30 ms |
2796 KB |
Output is correct |
| 59 |
Correct |
28 ms |
2028 KB |
Output is correct |
| 60 |
Correct |
31 ms |
2796 KB |
Output is correct |
| 61 |
Correct |
30 ms |
2712 KB |
Output is correct |
| 62 |
Correct |
31 ms |
2796 KB |
Output is correct |
| 63 |
Correct |
33 ms |
2796 KB |
Output is correct |
| 64 |
Correct |
32 ms |
2796 KB |
Output is correct |
| 65 |
Correct |
31 ms |
2924 KB |
Output is correct |
| 66 |
Correct |
34 ms |
2824 KB |
Output is correct |
| 67 |
Correct |
35 ms |
2912 KB |
Output is correct |
| 68 |
Correct |
31 ms |
2884 KB |
Output is correct |
| 69 |
Correct |
30 ms |
2796 KB |
Output is correct |
