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Submission #347843

# Submission time Handle Problem Language Result Execution time Memory
347843 2021-01-13T15:20:55 Z denkendoemeer Strange Device (APIO19_strange_device) C++14
100 / 100
 585 ms 36704 KB 
#include<bits/stdc++.h>
#define ll long long
using namespace std;
vector<pair<ll,ll>>v;
ll gcd(ll a,ll b)
{
    ll r=0;
    while(b){
        r=a%b;
        a=b;
        b=r;
    }
    return a;
}
int main()
{
    //freopen(".in","r",stdin);
    //freopen(".out","w",stdout);
    ll n,a,b,g,i,x,y,ans=0;
    scanf("%lld%lld%lld",&n,&a,&b);
    g=gcd(a,b+1);
    if ((long double)a/g*b>1e18){
        for(i=1;i<=n;i++)
            scanf("%lld%lld",&x,&y),ans=ans+y-x+1;
        printf("%lld\n",ans);
        return 0;
    }
    ll aux=a/g*b;
    for(i=1;i<=n;i++){
        scanf("%lld%lld",&x,&y);
        if (y-x+1>=aux){
            printf("%lld\n",aux);
            return 0;
        }
        x=x%aux;
        y=y%aux;
        if (x>y){
            v.push_back(make_pair(x,aux-1));
            v.push_back(make_pair(0,y));
        }
        else
            v.push_back(make_pair(x,y));
    }
    sort(v.begin(),v.end());
    ll last=-1;
    for(auto it:v){
        ans=ans+max(0LL,it.second-max(last,it.first-1));
        last=max(last,it.second);
    }
    printf("%lld\n",min(ans,aux));
return 0;
}

Compilation message

strange_device.cpp: In function 'int main()':
strange_device.cpp:20:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   20 |     scanf("%lld%lld%lld",&n,&a,&b);
      |     ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
strange_device.cpp:24:18: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   24 |             scanf("%lld%lld",&x,&y),ans=ans+y-x+1;
      |             ~~~~~^~~~~~~~~~~~~~~~~~
strange_device.cpp:30:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   30 |         scanf("%lld%lld",&x,&y);
      |         ~~~~~^~~~~~~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 364 KB Output is correct
2 Correct 6 ms 748 KB Output is correct
3 Correct 5 ms 748 KB Output is correct
4 Correct 0 ms 364 KB Output is correct
5 Correct 0 ms 364 KB Output is correct
6 Correct 0 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 0 ms 364 KB Output is correct
13 Correct 0 ms 364 KB Output is correct
14 Correct 0 ms 364 KB Output is correct
15 Correct 1 ms 364 KB Output is correct
16 Correct 5 ms 748 KB Output is correct
17 Correct 56 ms 2528 KB Output is correct
18 Correct 1 ms 364 KB Output is correct

Subtask #2
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 364 KB Output is correct
2 Correct 0 ms 364 KB Output is correct
3 Correct 0 ms 364 KB Output is correct
4 Correct 0 ms 364 KB Output is correct
5 Correct 0 ms 364 KB Output is correct

Subtask #3
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 364 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 361 ms 16840 KB Output is correct

Subtask #4
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 364 KB Output is correct
2 Correct 505 ms 16992 KB Output is correct
3 Correct 498 ms 16848 KB Output is correct
4 Correct 489 ms 16840 KB Output is correct

Subtask #5
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 364 KB Output is correct
2 Correct 505 ms 16992 KB Output is correct
3 Correct 498 ms 16848 KB Output is correct
4 Correct 489 ms 16840 KB Output is correct
5 Correct 0 ms 364 KB Output is correct
6 Correct 501 ms 16840 KB Output is correct
7 Correct 501 ms 16840 KB Output is correct
8 Correct 498 ms 16980 KB Output is correct
9 Correct 536 ms 16984 KB Output is correct

Subtask #6
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 364 KB Output is correct
2 Correct 505 ms 16992 KB Output is correct
3 Correct 498 ms 16848 KB Output is correct
4 Correct 489 ms 16840 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 49 ms 2528 KB Output is correct
7 Correct 52 ms 2528 KB Output is correct
8 Correct 48 ms 2528 KB Output is correct
9 Correct 49 ms 2528 KB Output is correct
10 Correct 50 ms 5724 KB Output is correct
11 Correct 51 ms 5724 KB Output is correct
12 Correct 52 ms 5868 KB Output is correct
13 Correct 54 ms 5724 KB Output is correct
14 Correct 49 ms 5724 KB Output is correct
15 Correct 56 ms 5724 KB Output is correct
16 Correct 54 ms 5724 KB Output is correct
17 Correct 54 ms 5724 KB Output is correct
18 Correct 505 ms 36680 KB Output is correct
19 Correct 501 ms 36680 KB Output is correct
20 Correct 547 ms 36680 KB Output is correct
21 Correct 54 ms 5724 KB Output is correct
22 Correct 49 ms 5724 KB Output is correct
23 Correct 156 ms 18516 KB Output is correct

Subtask #7
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 53 ms 2528 KB Output is correct
3 Correct 55 ms 2528 KB Output is correct
4 Correct 585 ms 16840 KB Output is correct
5 Correct 52 ms 2528 KB Output is correct
6 Correct 53 ms 2528 KB Output is correct
7 Correct 77 ms 2528 KB Output is correct
8 Correct 78 ms 2528 KB Output is correct
9 Correct 52 ms 2528 KB Output is correct
10 Correct 53 ms 2528 KB Output is correct
11 Correct 62 ms 2528 KB Output is correct
12 Correct 47 ms 2528 KB Output is correct
13 Correct 56 ms 5724 KB Output is correct
14 Correct 550 ms 36684 KB Output is correct
15 Correct 53 ms 5724 KB Output is correct
16 Correct 506 ms 36704 KB Output is correct
17 Correct 503 ms 36552 KB Output is correct
18 Correct 1 ms 364 KB Output is correct

Subtask #8
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 364 KB Output is correct
2 Correct 6 ms 748 KB Output is correct
3 Correct 5 ms 748 KB Output is correct
4 Correct 0 ms 364 KB Output is correct
5 Correct 0 ms 364 KB Output is correct
6 Correct 0 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 0 ms 364 KB Output is correct
13 Correct 0 ms 364 KB Output is correct
14 Correct 0 ms 364 KB Output is correct
15 Correct 1 ms 364 KB Output is correct
16 Correct 5 ms 748 KB Output is correct
17 Correct 56 ms 2528 KB Output is correct
18 Correct 1 ms 364 KB Output is correct
19 Correct 0 ms 364 KB Output is correct
20 Correct 0 ms 364 KB Output is correct
21 Correct 0 ms 364 KB Output is correct
22 Correct 0 ms 364 KB Output is correct
23 Correct 0 ms 364 KB Output is correct
24 Correct 0 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 361 ms 16840 KB Output is correct
29 Correct 0 ms 364 KB Output is correct
30 Correct 505 ms 16992 KB Output is correct
31 Correct 498 ms 16848 KB Output is correct
32 Correct 489 ms 16840 KB Output is correct
33 Correct 0 ms 364 KB Output is correct
34 Correct 501 ms 16840 KB Output is correct
35 Correct 501 ms 16840 KB Output is correct
36 Correct 498 ms 16980 KB Output is correct
37 Correct 536 ms 16984 KB Output is correct
38 Correct 1 ms 364 KB Output is correct
39 Correct 49 ms 2528 KB Output is correct
40 Correct 52 ms 2528 KB Output is correct
41 Correct 48 ms 2528 KB Output is correct
42 Correct 49 ms 2528 KB Output is correct
43 Correct 50 ms 5724 KB Output is correct
44 Correct 51 ms 5724 KB Output is correct
45 Correct 52 ms 5868 KB Output is correct
46 Correct 54 ms 5724 KB Output is correct
47 Correct 49 ms 5724 KB Output is correct
48 Correct 56 ms 5724 KB Output is correct
49 Correct 54 ms 5724 KB Output is correct
50 Correct 54 ms 5724 KB Output is correct
51 Correct 505 ms 36680 KB Output is correct
52 Correct 501 ms 36680 KB Output is correct
53 Correct 547 ms 36680 KB Output is correct
54 Correct 54 ms 5724 KB Output is correct
55 Correct 49 ms 5724 KB Output is correct
56 Correct 156 ms 18516 KB Output is correct
57 Correct 1 ms 364 KB Output is correct
58 Correct 53 ms 2528 KB Output is correct
59 Correct 55 ms 2528 KB Output is correct
60 Correct 585 ms 16840 KB Output is correct
61 Correct 52 ms 2528 KB Output is correct
62 Correct 53 ms 2528 KB Output is correct
63 Correct 77 ms 2528 KB Output is correct
64 Correct 78 ms 2528 KB Output is correct
65 Correct 52 ms 2528 KB Output is correct
66 Correct 53 ms 2528 KB Output is correct
67 Correct 62 ms 2528 KB Output is correct
68 Correct 47 ms 2528 KB Output is correct
69 Correct 56 ms 5724 KB Output is correct
70 Correct 550 ms 36684 KB Output is correct
71 Correct 53 ms 5724 KB Output is correct
72 Correct 506 ms 36704 KB Output is correct
73 Correct 503 ms 36552 KB Output is correct
74 Correct 1 ms 364 KB Output is correct
75 Correct 1 ms 364 KB Output is correct
76 Correct 1 ms 364 KB Output is correct
77 Correct 1 ms 364 KB Output is correct
78 Correct 1 ms 364 KB Output is correct
79 Correct 6 ms 1132 KB Output is correct
80 Correct 567 ms 36552 KB Output is correct
81 Correct 570 ms 36680 KB Output is correct
82 Correct 540 ms 36552 KB Output is correct
83 Correct 540 ms 36552 KB Output is correct
84 Correct 549 ms 36680 KB Output is correct
85 Correct 543 ms 36552 KB Output is correct
86 Correct 156 ms 18516 KB Output is correct
87 Correct 1 ms 364 KB Output is correct