oj.uz

답안 #173571

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
173571 2020-01-04T16:20:05 Z juggernaut Bigger segments (IZhO19_segments) C++14
37 / 100
 1500 ms 4220 KB 
//Just try and the idea will come
#include<bits/stdc++.h>
#define ll long long int
#define fr first
#define sc second
using namespace std;
ll pref[500001],i,n,l,r,m,tree[2000001],a[500001];
pair<ll,ll>dp[500001];
void update(int v,int l,int r,int pos,int val){
      if(l==pos&&r==pos){
            tree[v]=val;
            return;
      }
      int mid=(l+r)>>1;
      if(pos<=mid)update((v<<1),l,mid,pos,val);
      else update((v<<1)+1,mid+1,r,pos,val);
      tree[v]=min(tree[(v<<1)],tree[(v<<1)+1]);
}
int get(int v,int l,int r,int ql,int qr){
      if(ql<=l&&r<=qr)return tree[v];
      if(r<ql||qr<l)return 1e15;
      int mid=(l+r)>>1;
      return min(get((v<<1),l,mid,ql,qr),get((v<<1)+1,mid+1,r,ql,qr));
}
int get(int l,int r){
    ll mn=1e15;
    for(int i=l;i<=r;i++)mn=min(mn,a[i]);
    return mn;
}
int main(){
    scanf("%lld",&n);
    for(i=1;i<=n;i++){
        scanf("%lld",&pref[i]);
        pref[i]+=pref[i-1];
    }
    for(i=1;i<=n;i++){
        int l;
        for(int j=0;j<i;j++)
            if(pref[i]>=/*get(1,0,n,j,j)*/a[j])l=j;
        /*l=0,r=i-1;
        while(l<r){
            m=(l+r+1)>>1;
            if(pref[i]>=get(1,0,n,m,i-1))l=m;
            else r=m-1;
        }*/
        dp[i]={dp[l].fr+1,pref[i]-pref[l]};
        a[i]=dp[i].sc+pref[i];
        update(1,0,n,i,dp[i].sc+pref[i]);
    }
    printf("%lld",dp[n].fr);
}

Compilation message

segments.cpp: In function 'int get(int, int, int, int, int)':
segments.cpp:21:28: warning: overflow in implicit constant conversion [-Woverflow]
       if(r<ql||qr<l)return 1e15;
                            ^~~~
segments.cpp: In function 'int main()':
segments.cpp:31:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%lld",&n);
     ~~~~~^~~~~~~~~~~
segments.cpp:33:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%lld",&pref[i]);
         ~~~~~^~~~~~~~~~~~~~~~~
segments.cpp:46:41: warning: 'l' may be used uninitialized in this function [-Wmaybe-uninitialized]
         dp[i]={dp[l].fr+1,pref[i]-pref[l]};
                                   ~~~~~~^

Subtask #1
13.0 / 13.0

# 결과 실행 시간 메모리 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 376 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 376 KB Output is correct
11 Correct 2 ms 376 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

Subtask #2
14.0 / 14.0

# 결과 실행 시간 메모리 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 376 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 376 KB Output is correct
11 Correct 2 ms 376 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 380 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 380 KB Output is correct
24 Correct 2 ms 376 KB Output is correct
25 Correct 2 ms 376 KB Output is correct
26 Correct 2 ms 376 KB Output is correct
27 Correct 2 ms 380 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

Subtask #3
10.0 / 10.0

# 결과 실행 시간 메모리 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 376 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 376 KB Output is correct
11 Correct 2 ms 376 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 380 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 380 KB Output is correct
24 Correct 2 ms 376 KB Output is correct
25 Correct 2 ms 376 KB Output is correct
26 Correct 2 ms 376 KB Output is correct
27 Correct 2 ms 380 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 6 ms 632 KB Output is correct
32 Correct 6 ms 508 KB Output is correct
33 Correct 6 ms 504 KB Output is correct
34 Correct 6 ms 504 KB Output is correct
35 Correct 6 ms 504 KB Output is correct
36 Correct 6 ms 508 KB Output is correct
37 Correct 5 ms 504 KB Output is correct
38 Correct 4 ms 504 KB Output is correct
39 Correct 6 ms 520 KB Output is correct
40 Correct 6 ms 504 KB Output is correct
41 Correct 6 ms 632 KB Output is correct
42 Correct 6 ms 508 KB Output is correct
43 Correct 6 ms 504 KB Output is correct
44 Correct 6 ms 504 KB Output is correct
45 Correct 6 ms 508 KB Output is correct

Subtask #4
0 / 36.0

# 결과 실행 시간 메모리 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 376 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 376 KB Output is correct
11 Correct 2 ms 376 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 380 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 380 KB Output is correct
24 Correct 2 ms 376 KB Output is correct
25 Correct 2 ms 376 KB Output is correct
26 Correct 2 ms 376 KB Output is correct
27 Correct 2 ms 380 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 6 ms 632 KB Output is correct
32 Correct 6 ms 508 KB Output is correct
33 Correct 6 ms 504 KB Output is correct
34 Correct 6 ms 504 KB Output is correct
35 Correct 6 ms 504 KB Output is correct
36 Correct 6 ms 508 KB Output is correct
37 Correct 5 ms 504 KB Output is correct
38 Correct 4 ms 504 KB Output is correct
39 Correct 6 ms 520 KB Output is correct
40 Correct 6 ms 504 KB Output is correct
41 Correct 6 ms 632 KB Output is correct
42 Correct 6 ms 508 KB Output is correct
43 Correct 6 ms 504 KB Output is correct
44 Correct 6 ms 504 KB Output is correct
45 Correct 6 ms 508 KB Output is correct
46 Execution timed out 1544 ms 4220 KB Time limit exceeded
47 Halted 0 ms 0 KB -

Subtask #5
0 / 27.0

# 결과 실행 시간 메모리 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 376 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 376 KB Output is correct
11 Correct 2 ms 376 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 380 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 380 KB Output is correct
24 Correct 2 ms 376 KB Output is correct
25 Correct 2 ms 376 KB Output is correct
26 Correct 2 ms 376 KB Output is correct
27 Correct 2 ms 380 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 6 ms 632 KB Output is correct
32 Correct 6 ms 508 KB Output is correct
33 Correct 6 ms 504 KB Output is correct
34 Correct 6 ms 504 KB Output is correct
35 Correct 6 ms 504 KB Output is correct
36 Correct 6 ms 508 KB Output is correct
37 Correct 5 ms 504 KB Output is correct
38 Correct 4 ms 504 KB Output is correct
39 Correct 6 ms 520 KB Output is correct
40 Correct 6 ms 504 KB Output is correct
41 Correct 6 ms 632 KB Output is correct
42 Correct 6 ms 508 KB Output is correct
43 Correct 6 ms 504 KB Output is correct
44 Correct 6 ms 504 KB Output is correct
45 Correct 6 ms 508 KB Output is correct
46 Execution timed out 1544 ms 4220 KB Time limit exceeded
47 Halted 0 ms 0 KB -