#include <bits/stdc++.h>
#define F first
#define S second
using namespace std;
long long n,a[500005],S[500005];
pair < long long , int > dp[500005];
main () {
cin>>n;
for (int i=1; i<=n; i++) {
cin>>a[i];
S[i]=S[i-1]+a[i];
dp[i].F=1e18;
}
dp[0].S=1;
for (int i=1; i<=n; i++) {
if (dp[i].F>=dp[i-1].F+a[i]) dp[i].F=dp[i-1].F+a[i],dp[i].S=dp[i-1].S;
int l=i+1,r=n,mid,idx=-1;
while (l<=r) {
mid=(l+r)/2;
if (S[mid]-S[i]>=dp[i].F) { idx=mid; r=mid-1; }
else l=mid+1;
}
if (idx==-1) continue;
if (dp[idx].F>=S[idx]-S[i]) dp[idx].F=S[idx]-S[i],dp[idx].S=dp[i].S+1;
}
cout<<dp[n].S<<endl;
}
Compilation message
segments.cpp:7:7: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
main () {
^
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
2 ms |
376 KB |
Output is correct |
| 2 |
Correct |
2 ms |
376 KB |
Output is correct |
| 3 |
Correct |
2 ms |
376 KB |
Output is correct |
| 4 |
Correct |
2 ms |
376 KB |
Output is correct |
| 5 |
Correct |
2 ms |
376 KB |
Output is correct |
| 6 |
Correct |
2 ms |
376 KB |
Output is correct |
| 7 |
Correct |
2 ms |
424 KB |
Output is correct |
| 8 |
Correct |
2 ms |
376 KB |
Output is correct |
| 9 |
Correct |
2 ms |
376 KB |
Output is correct |
| 10 |
Correct |
2 ms |
380 KB |
Output is correct |
| 11 |
Correct |
2 ms |
404 KB |
Output is correct |
| 12 |
Correct |
2 ms |
376 KB |
Output is correct |
| 13 |
Correct |
2 ms |
376 KB |
Output is correct |
| 14 |
Correct |
2 ms |
376 KB |
Output is correct |
| 15 |
Correct |
2 ms |
376 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
2 ms |
376 KB |
Output is correct |
| 2 |
Correct |
2 ms |
376 KB |
Output is correct |
| 3 |
Correct |
2 ms |
376 KB |
Output is correct |
| 4 |
Correct |
2 ms |
376 KB |
Output is correct |
| 5 |
Correct |
2 ms |
376 KB |
Output is correct |
| 6 |
Correct |
2 ms |
376 KB |
Output is correct |
| 7 |
Correct |
2 ms |
424 KB |
Output is correct |
| 8 |
Correct |
2 ms |
376 KB |
Output is correct |
| 9 |
Correct |
2 ms |
376 KB |
Output is correct |
| 10 |
Correct |
2 ms |
380 KB |
Output is correct |
| 11 |
Correct |
2 ms |
404 KB |
Output is correct |
| 12 |
Correct |
2 ms |
376 KB |
Output is correct |
| 13 |
Correct |
2 ms |
376 KB |
Output is correct |
| 14 |
Correct |
2 ms |
376 KB |
Output is correct |
| 15 |
Correct |
2 ms |
376 KB |
Output is correct |
| 16 |
Correct |
2 ms |
376 KB |
Output is correct |
| 17 |
Correct |
2 ms |
376 KB |
Output is correct |
| 18 |
Correct |
2 ms |
376 KB |
Output is correct |
| 19 |
Correct |
2 ms |
376 KB |
Output is correct |
| 20 |
Correct |
2 ms |
376 KB |
Output is correct |
| 21 |
Correct |
2 ms |
376 KB |
Output is correct |
| 22 |
Correct |
2 ms |
376 KB |
Output is correct |
| 23 |
Correct |
2 ms |
376 KB |
Output is correct |
| 24 |
Correct |
2 ms |
376 KB |
Output is correct |
| 25 |
Correct |
3 ms |
376 KB |
Output is correct |
| 26 |
Correct |
2 ms |
376 KB |
Output is correct |
| 27 |
Correct |
2 ms |
376 KB |
Output is correct |
| 28 |
Correct |
2 ms |
376 KB |
Output is correct |
| 29 |
Correct |
2 ms |
376 KB |
Output is correct |
| 30 |
Correct |
2 ms |
376 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
2 ms |
376 KB |
Output is correct |
| 2 |
Correct |
2 ms |
376 KB |
Output is correct |
| 3 |
Correct |
2 ms |
376 KB |
Output is correct |
| 4 |
Correct |
2 ms |
376 KB |
Output is correct |
| 5 |
Correct |
2 ms |
376 KB |
Output is correct |
| 6 |
Correct |
2 ms |
376 KB |
Output is correct |
| 7 |
Correct |
2 ms |
424 KB |
Output is correct |
| 8 |
Correct |
2 ms |
376 KB |
Output is correct |
| 9 |
Correct |
2 ms |
376 KB |
Output is correct |
| 10 |
Correct |
2 ms |
380 KB |
Output is correct |
| 11 |
Correct |
2 ms |
404 KB |
Output is correct |
| 12 |
Correct |
2 ms |
376 KB |
Output is correct |
| 13 |
Correct |
2 ms |
376 KB |
Output is correct |
| 14 |
Correct |
2 ms |
376 KB |
Output is correct |
| 15 |
Correct |
2 ms |
376 KB |
Output is correct |
| 16 |
Correct |
2 ms |
376 KB |
Output is correct |
| 17 |
Correct |
2 ms |
376 KB |
Output is correct |
| 18 |
Correct |
2 ms |
376 KB |
Output is correct |
| 19 |
Correct |
2 ms |
376 KB |
Output is correct |
| 20 |
Correct |
2 ms |
376 KB |
Output is correct |
| 21 |
Correct |
2 ms |
376 KB |
Output is correct |
| 22 |
Correct |
2 ms |
376 KB |
Output is correct |
| 23 |
Correct |
2 ms |
376 KB |
Output is correct |
| 24 |
Correct |
2 ms |
376 KB |
Output is correct |
| 25 |
Correct |
3 ms |
376 KB |
Output is correct |
| 26 |
Correct |
2 ms |
376 KB |
Output is correct |
| 27 |
Correct |
2 ms |
376 KB |
Output is correct |
| 28 |
Correct |
2 ms |
376 KB |
Output is correct |
| 29 |
Correct |
2 ms |
376 KB |
Output is correct |
| 30 |
Correct |
2 ms |
376 KB |
Output is correct |
| 31 |
Correct |
4 ms |
376 KB |
Output is correct |
| 32 |
Correct |
4 ms |
476 KB |
Output is correct |
| 33 |
Correct |
4 ms |
504 KB |
Output is correct |
| 34 |
Correct |
4 ms |
504 KB |
Output is correct |
| 35 |
Correct |
4 ms |
508 KB |
Output is correct |
| 36 |
Correct |
4 ms |
504 KB |
Output is correct |
| 37 |
Correct |
4 ms |
504 KB |
Output is correct |
| 38 |
Correct |
4 ms |
376 KB |
Output is correct |
| 39 |
Correct |
3 ms |
376 KB |
Output is correct |
| 40 |
Correct |
4 ms |
504 KB |
Output is correct |
| 41 |
Correct |
3 ms |
376 KB |
Output is correct |
| 42 |
Correct |
3 ms |
376 KB |
Output is correct |
| 43 |
Correct |
3 ms |
376 KB |
Output is correct |
| 44 |
Correct |
3 ms |
376 KB |
Output is correct |
| 45 |
Correct |
3 ms |
376 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
2 ms |
376 KB |
Output is correct |
| 2 |
Correct |
2 ms |
376 KB |
Output is correct |
| 3 |
Correct |
2 ms |
376 KB |
Output is correct |
| 4 |
Correct |
2 ms |
376 KB |
Output is correct |
| 5 |
Correct |
2 ms |
376 KB |
Output is correct |
| 6 |
Correct |
2 ms |
376 KB |
Output is correct |
| 7 |
Correct |
2 ms |
424 KB |
Output is correct |
| 8 |
Correct |
2 ms |
376 KB |
Output is correct |
| 9 |
Correct |
2 ms |
376 KB |
Output is correct |
| 10 |
Correct |
2 ms |
380 KB |
Output is correct |
| 11 |
Correct |
2 ms |
404 KB |
Output is correct |
| 12 |
Correct |
2 ms |
376 KB |
Output is correct |
| 13 |
Correct |
2 ms |
376 KB |
Output is correct |
| 14 |
Correct |
2 ms |
376 KB |
Output is correct |
| 15 |
Correct |
2 ms |
376 KB |
Output is correct |
| 16 |
Correct |
2 ms |
376 KB |
Output is correct |
| 17 |
Correct |
2 ms |
376 KB |
Output is correct |
| 18 |
Correct |
2 ms |
376 KB |
Output is correct |
| 19 |
Correct |
2 ms |
376 KB |
Output is correct |
| 20 |
Correct |
2 ms |
376 KB |
Output is correct |
| 21 |
Correct |
2 ms |
376 KB |
Output is correct |
| 22 |
Correct |
2 ms |
376 KB |
Output is correct |
| 23 |
Correct |
2 ms |
376 KB |
Output is correct |
| 24 |
Correct |
2 ms |
376 KB |
Output is correct |
| 25 |
Correct |
3 ms |
376 KB |
Output is correct |
| 26 |
Correct |
2 ms |
376 KB |
Output is correct |
| 27 |
Correct |
2 ms |
376 KB |
Output is correct |
| 28 |
Correct |
2 ms |
376 KB |
Output is correct |
| 29 |
Correct |
2 ms |
376 KB |
Output is correct |
| 30 |
Correct |
2 ms |
376 KB |
Output is correct |
| 31 |
Correct |
4 ms |
376 KB |
Output is correct |
| 32 |
Correct |
4 ms |
476 KB |
Output is correct |
| 33 |
Correct |
4 ms |
504 KB |
Output is correct |
| 34 |
Correct |
4 ms |
504 KB |
Output is correct |
| 35 |
Correct |
4 ms |
508 KB |
Output is correct |
| 36 |
Correct |
4 ms |
504 KB |
Output is correct |
| 37 |
Correct |
4 ms |
504 KB |
Output is correct |
| 38 |
Correct |
4 ms |
376 KB |
Output is correct |
| 39 |
Correct |
3 ms |
376 KB |
Output is correct |
| 40 |
Correct |
4 ms |
504 KB |
Output is correct |
| 41 |
Correct |
3 ms |
376 KB |
Output is correct |
| 42 |
Correct |
3 ms |
376 KB |
Output is correct |
| 43 |
Correct |
3 ms |
376 KB |
Output is correct |
| 44 |
Correct |
3 ms |
376 KB |
Output is correct |
| 45 |
Correct |
3 ms |
376 KB |
Output is correct |
| 46 |
Correct |
43 ms |
3872 KB |
Output is correct |
| 47 |
Correct |
54 ms |
3992 KB |
Output is correct |
| 48 |
Correct |
72 ms |
4372 KB |
Output is correct |
| 49 |
Correct |
78 ms |
4344 KB |
Output is correct |
| 50 |
Correct |
80 ms |
4600 KB |
Output is correct |
| 51 |
Correct |
89 ms |
4584 KB |
Output is correct |
| 52 |
Correct |
42 ms |
2388 KB |
Output is correct |
| 53 |
Correct |
26 ms |
1528 KB |
Output is correct |
| 54 |
Correct |
35 ms |
3704 KB |
Output is correct |
| 55 |
Correct |
81 ms |
4436 KB |
Output is correct |
| 56 |
Correct |
49 ms |
3960 KB |
Output is correct |
| 57 |
Correct |
47 ms |
4076 KB |
Output is correct |
| 58 |
Correct |
48 ms |
3960 KB |
Output is correct |
| 59 |
Correct |
57 ms |
4092 KB |
Output is correct |
| 60 |
Correct |
58 ms |
4216 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
2 ms |
376 KB |
Output is correct |
| 2 |
Correct |
2 ms |
376 KB |
Output is correct |
| 3 |
Correct |
2 ms |
376 KB |
Output is correct |
| 4 |
Correct |
2 ms |
376 KB |
Output is correct |
| 5 |
Correct |
2 ms |
376 KB |
Output is correct |
| 6 |
Correct |
2 ms |
376 KB |
Output is correct |
| 7 |
Correct |
2 ms |
424 KB |
Output is correct |
| 8 |
Correct |
2 ms |
376 KB |
Output is correct |
| 9 |
Correct |
2 ms |
376 KB |
Output is correct |
| 10 |
Correct |
2 ms |
380 KB |
Output is correct |
| 11 |
Correct |
2 ms |
404 KB |
Output is correct |
| 12 |
Correct |
2 ms |
376 KB |
Output is correct |
| 13 |
Correct |
2 ms |
376 KB |
Output is correct |
| 14 |
Correct |
2 ms |
376 KB |
Output is correct |
| 15 |
Correct |
2 ms |
376 KB |
Output is correct |
| 16 |
Correct |
2 ms |
376 KB |
Output is correct |
| 17 |
Correct |
2 ms |
376 KB |
Output is correct |
| 18 |
Correct |
2 ms |
376 KB |
Output is correct |
| 19 |
Correct |
2 ms |
376 KB |
Output is correct |
| 20 |
Correct |
2 ms |
376 KB |
Output is correct |
| 21 |
Correct |
2 ms |
376 KB |
Output is correct |
| 22 |
Correct |
2 ms |
376 KB |
Output is correct |
| 23 |
Correct |
2 ms |
376 KB |
Output is correct |
| 24 |
Correct |
2 ms |
376 KB |
Output is correct |
| 25 |
Correct |
3 ms |
376 KB |
Output is correct |
| 26 |
Correct |
2 ms |
376 KB |
Output is correct |
| 27 |
Correct |
2 ms |
376 KB |
Output is correct |
| 28 |
Correct |
2 ms |
376 KB |
Output is correct |
| 29 |
Correct |
2 ms |
376 KB |
Output is correct |
| 30 |
Correct |
2 ms |
376 KB |
Output is correct |
| 31 |
Correct |
4 ms |
376 KB |
Output is correct |
| 32 |
Correct |
4 ms |
476 KB |
Output is correct |
| 33 |
Correct |
4 ms |
504 KB |
Output is correct |
| 34 |
Correct |
4 ms |
504 KB |
Output is correct |
| 35 |
Correct |
4 ms |
508 KB |
Output is correct |
| 36 |
Correct |
4 ms |
504 KB |
Output is correct |
| 37 |
Correct |
4 ms |
504 KB |
Output is correct |
| 38 |
Correct |
4 ms |
376 KB |
Output is correct |
| 39 |
Correct |
3 ms |
376 KB |
Output is correct |
| 40 |
Correct |
4 ms |
504 KB |
Output is correct |
| 41 |
Correct |
3 ms |
376 KB |
Output is correct |
| 42 |
Correct |
3 ms |
376 KB |
Output is correct |
| 43 |
Correct |
3 ms |
376 KB |
Output is correct |
| 44 |
Correct |
3 ms |
376 KB |
Output is correct |
| 45 |
Correct |
3 ms |
376 KB |
Output is correct |
| 46 |
Correct |
43 ms |
3872 KB |
Output is correct |
| 47 |
Correct |
54 ms |
3992 KB |
Output is correct |
| 48 |
Correct |
72 ms |
4372 KB |
Output is correct |
| 49 |
Correct |
78 ms |
4344 KB |
Output is correct |
| 50 |
Correct |
80 ms |
4600 KB |
Output is correct |
| 51 |
Correct |
89 ms |
4584 KB |
Output is correct |
| 52 |
Correct |
42 ms |
2388 KB |
Output is correct |
| 53 |
Correct |
26 ms |
1528 KB |
Output is correct |
| 54 |
Correct |
35 ms |
3704 KB |
Output is correct |
| 55 |
Correct |
81 ms |
4436 KB |
Output is correct |
| 56 |
Correct |
49 ms |
3960 KB |
Output is correct |
| 57 |
Correct |
47 ms |
4076 KB |
Output is correct |
| 58 |
Correct |
48 ms |
3960 KB |
Output is correct |
| 59 |
Correct |
57 ms |
4092 KB |
Output is correct |
| 60 |
Correct |
58 ms |
4216 KB |
Output is correct |
| 61 |
Correct |
208 ms |
17892 KB |
Output is correct |
| 62 |
Correct |
221 ms |
18032 KB |
Output is correct |
| 63 |
Correct |
257 ms |
18360 KB |
Output is correct |
| 64 |
Correct |
376 ms |
20464 KB |
Output is correct |
| 65 |
Correct |
404 ms |
20828 KB |
Output is correct |
| 66 |
Correct |
400 ms |
20800 KB |
Output is correct |
| 67 |
Correct |
320 ms |
16700 KB |
Output is correct |
| 68 |
Correct |
161 ms |
8576 KB |
Output is correct |
| 69 |
Correct |
168 ms |
17196 KB |
Output is correct |
| 70 |
Correct |
395 ms |
20984 KB |
Output is correct |
| 71 |
Correct |
218 ms |
17912 KB |
Output is correct |
| 72 |
Correct |
249 ms |
18424 KB |
Output is correct |
| 73 |
Correct |
284 ms |
18936 KB |
Output is correct |
| 74 |
Correct |
304 ms |
19320 KB |
Output is correct |
| 75 |
Correct |
310 ms |
19404 KB |
Output is correct |
