oj.uz

Submission #469175

# Submission time Handle Problem Language Result Execution time Memory
469175 2021-08-31T03:59:07 Z Cross_Ratio Strange Device (APIO19_strange_device) C++14
100 / 100
 1089 ms 67940 KB 
#include <bits/stdc++.h>
#define int long long
using namespace std;
int gcd(int a, int b) {
    a = abs(a);
    b = abs(b);
    if(a < b) swap(a, b);
    while(b) {
        a %= b;
        swap(a, b);
    }
    return a;
}
vector<int> B;
int getidx(int n) {
    return lower_bound(B.begin(),B.end(),n) - B.begin();
}
struct SegTree {
    vector<int> seg;
    int MAX;
    SegTree(int N) {
        int i;
        for(i=2;i<2*N;i*=2) {}
        seg.resize(i);
        MAX = i;
    }
    int sum(int s, int e, int n, int ns, int ne) {
        if(e<=ns||ne<=s) return 0;
        if(s<=ns&&ne<=e) return seg[n];
        int mid = ns + ne >> 1;
        return sum(s, e, 2*n, ns, mid) + sum(s, e, 2*n+1, mid, ne);
    }
    void update(int n) {
        n += MAX/2;
        n /= 2;
        while(n) {
            seg[n] = seg[2*n] + seg[2*n+1];
            n /= 2;
        }
    }
    void Plus(int n) {
        seg[n+MAX/2]++;
        update(n);
    }
    void Minus(int n) {
        seg[n+MAX/2]--;
        update(n);
    }
    int sum(int s, int e) {
        return sum(s, e, 1, 0, MAX/2);
    }
};
int L[1000005];
int R[1000005];
bool Check(int a, int b) {
    int d = 1e9;
    int a1 = a / d;
    int a2 = a % d;
    int b1 = b / d;
    int b2 = b % d;
    if(a1&&b1) return true;
    //cout << a1 * b2 + a2 * b1 + (a2 * b2 / d) ;
    if(a1*b2+a2*b1 + (a2*b2/d) >= d) return true;
    return false;
}
const int INF = 1e18;
main() {
    cin.sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);
    int N, a, b;
    cin >> N >> a >> b;
    int d = gcd(a, b + 1);
    int c = a / d;
    assert(a % d == 0);
    int k;
    if(Check(b, c)) k = INF + 5;
    else k = b * c;
    //cout << k;
    assert(k < INF + 10);
    assert(k > 0);
    bool isAll = false;
    int i;
    B.push_back(0);
    B.push_back(k);
    for(i=0;i<N;i++) {
        cin >> L[i] >> R[i];
        if(R[i] - L[i] >= k-1) isAll = true;
        L[i] %= k;
        R[i] %= k;
        R[i]++;
        B.push_back(L[i]);
        B.push_back(R[i]);
    }
    sort(B.begin(),B.end());
    B.erase(unique(B.begin(),B.end()),B.end());
    SegTree tree(B.size() + 10);
    for(i=0;i<N;i++) {
        int l = getidx(L[i]);
        int r = getidx(R[i]);
        if(l < r) {
            tree.Plus(l);
            tree.Minus(r);
        }
        else {
            tree.Plus(0);
            tree.Minus(r);
            tree.Plus(l);
            tree.Minus(B.size());
        }
    }
    int cnt = 0;
    for(i=0;i<B.size()-1;i++) {
        if(tree.sum(0,i+1)!=0) {
            cnt += B[i+1]-B[i];
        }
    }
    if(isAll) cnt = k;
    cout << cnt;
}

Compilation message

strange_device.cpp: In member function 'long long int SegTree::sum(long long int, long long int, long long int, long long int, long long int)':
strange_device.cpp:30:22: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   30 |         int mid = ns + ne >> 1;
      |                   ~~~^~~~
strange_device.cpp: At global scope:
strange_device.cpp:67:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   67 | main() {
      | ^~~~
strange_device.cpp: In function 'int main()':
strange_device.cpp:113:14: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  113 |     for(i=0;i<B.size()-1;i++) {
      |             ~^~~~~~~~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 10 ms 1044 KB Output is correct
3 Correct 9 ms 1052 KB Output is correct
4 Correct 0 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 0 ms 204 KB Output is correct
7 Correct 1 ms 332 KB Output is correct
8 Correct 1 ms 332 KB Output is correct
9 Correct 1 ms 332 KB Output is correct
10 Correct 0 ms 204 KB Output is correct
11 Correct 1 ms 204 KB Output is correct
12 Correct 1 ms 204 KB Output is correct
13 Correct 0 ms 204 KB Output is correct
14 Correct 0 ms 204 KB Output is correct
15 Correct 1 ms 332 KB Output is correct
16 Correct 10 ms 976 KB Output is correct
17 Correct 95 ms 5560 KB Output is correct
18 Correct 1 ms 204 KB Output is correct

Subtask #2
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 0 ms 204 KB Output is correct
5 Correct 0 ms 204 KB Output is correct

Subtask #3
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 1 ms 332 KB Output is correct
3 Correct 2 ms 332 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Correct 431 ms 31644 KB Output is correct

Subtask #4
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 987 ms 48368 KB Output is correct
3 Correct 986 ms 48172 KB Output is correct
4 Correct 962 ms 48228 KB Output is correct

Subtask #5
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 987 ms 48368 KB Output is correct
3 Correct 986 ms 48172 KB Output is correct
4 Correct 962 ms 48228 KB Output is correct
5 Correct 0 ms 204 KB Output is correct
6 Correct 955 ms 48136 KB Output is correct
7 Correct 1004 ms 48160 KB Output is correct
8 Correct 936 ms 48136 KB Output is correct
9 Correct 1086 ms 48056 KB Output is correct

Subtask #6
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 987 ms 48368 KB Output is correct
3 Correct 986 ms 48172 KB Output is correct
4 Correct 962 ms 48228 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 87 ms 5640 KB Output is correct
7 Correct 95 ms 5568 KB Output is correct
8 Correct 81 ms 5644 KB Output is correct
9 Correct 90 ms 5560 KB Output is correct
10 Correct 91 ms 5552 KB Output is correct
11 Correct 91 ms 5608 KB Output is correct
12 Correct 86 ms 5608 KB Output is correct
13 Correct 95 ms 5644 KB Output is correct
14 Correct 86 ms 5616 KB Output is correct
15 Correct 103 ms 5688 KB Output is correct
16 Correct 95 ms 5636 KB Output is correct
17 Correct 89 ms 5640 KB Output is correct
18 Correct 933 ms 48204 KB Output is correct
19 Correct 1076 ms 48092 KB Output is correct
20 Correct 1053 ms 48172 KB Output is correct
21 Correct 100 ms 5648 KB Output is correct
22 Correct 86 ms 5560 KB Output is correct
23 Correct 170 ms 12740 KB Output is correct

Subtask #7
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 116 ms 5520 KB Output is correct
3 Correct 112 ms 5636 KB Output is correct
4 Correct 1053 ms 48172 KB Output is correct
5 Correct 95 ms 5560 KB Output is correct
6 Correct 96 ms 5604 KB Output is correct
7 Correct 97 ms 5596 KB Output is correct
8 Correct 92 ms 5688 KB Output is correct
9 Correct 94 ms 5736 KB Output is correct
10 Correct 94 ms 5532 KB Output is correct
11 Correct 95 ms 5616 KB Output is correct
12 Correct 86 ms 5644 KB Output is correct
13 Correct 95 ms 5640 KB Output is correct
14 Correct 1046 ms 48248 KB Output is correct
15 Correct 94 ms 5644 KB Output is correct
16 Correct 991 ms 48164 KB Output is correct
17 Correct 976 ms 48172 KB Output is correct
18 Correct 0 ms 204 KB Output is correct

Subtask #8
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 10 ms 1044 KB Output is correct
3 Correct 9 ms 1052 KB Output is correct
4 Correct 0 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 0 ms 204 KB Output is correct
7 Correct 1 ms 332 KB Output is correct
8 Correct 1 ms 332 KB Output is correct
9 Correct 1 ms 332 KB Output is correct
10 Correct 0 ms 204 KB Output is correct
11 Correct 1 ms 204 KB Output is correct
12 Correct 1 ms 204 KB Output is correct
13 Correct 0 ms 204 KB Output is correct
14 Correct 0 ms 204 KB Output is correct
15 Correct 1 ms 332 KB Output is correct
16 Correct 10 ms 976 KB Output is correct
17 Correct 95 ms 5560 KB Output is correct
18 Correct 1 ms 204 KB Output is correct
19 Correct 0 ms 204 KB Output is correct
20 Correct 1 ms 204 KB Output is correct
21 Correct 0 ms 204 KB Output is correct
22 Correct 0 ms 204 KB Output is correct
23 Correct 0 ms 204 KB Output is correct
24 Correct 0 ms 204 KB Output is correct
25 Correct 1 ms 332 KB Output is correct
26 Correct 2 ms 332 KB Output is correct
27 Correct 1 ms 332 KB Output is correct
28 Correct 431 ms 31644 KB Output is correct
29 Correct 1 ms 204 KB Output is correct
30 Correct 987 ms 48368 KB Output is correct
31 Correct 986 ms 48172 KB Output is correct
32 Correct 962 ms 48228 KB Output is correct
33 Correct 0 ms 204 KB Output is correct
34 Correct 955 ms 48136 KB Output is correct
35 Correct 1004 ms 48160 KB Output is correct
36 Correct 936 ms 48136 KB Output is correct
37 Correct 1086 ms 48056 KB Output is correct
38 Correct 1 ms 204 KB Output is correct
39 Correct 87 ms 5640 KB Output is correct
40 Correct 95 ms 5568 KB Output is correct
41 Correct 81 ms 5644 KB Output is correct
42 Correct 90 ms 5560 KB Output is correct
43 Correct 91 ms 5552 KB Output is correct
44 Correct 91 ms 5608 KB Output is correct
45 Correct 86 ms 5608 KB Output is correct
46 Correct 95 ms 5644 KB Output is correct
47 Correct 86 ms 5616 KB Output is correct
48 Correct 103 ms 5688 KB Output is correct
49 Correct 95 ms 5636 KB Output is correct
50 Correct 89 ms 5640 KB Output is correct
51 Correct 933 ms 48204 KB Output is correct
52 Correct 1076 ms 48092 KB Output is correct
53 Correct 1053 ms 48172 KB Output is correct
54 Correct 100 ms 5648 KB Output is correct
55 Correct 86 ms 5560 KB Output is correct
56 Correct 170 ms 12740 KB Output is correct
57 Correct 1 ms 204 KB Output is correct
58 Correct 116 ms 5520 KB Output is correct
59 Correct 112 ms 5636 KB Output is correct
60 Correct 1053 ms 48172 KB Output is correct
61 Correct 95 ms 5560 KB Output is correct
62 Correct 96 ms 5604 KB Output is correct
63 Correct 97 ms 5596 KB Output is correct
64 Correct 92 ms 5688 KB Output is correct
65 Correct 94 ms 5736 KB Output is correct
66 Correct 94 ms 5532 KB Output is correct
67 Correct 95 ms 5616 KB Output is correct
68 Correct 86 ms 5644 KB Output is correct
69 Correct 95 ms 5640 KB Output is correct
70 Correct 1046 ms 48248 KB Output is correct
71 Correct 94 ms 5644 KB Output is correct
72 Correct 991 ms 48164 KB Output is correct
73 Correct 976 ms 48172 KB Output is correct
74 Correct 0 ms 204 KB Output is correct
75 Correct 1 ms 204 KB Output is correct
76 Correct 0 ms 204 KB Output is correct
77 Correct 1 ms 332 KB Output is correct
78 Correct 1 ms 204 KB Output is correct
79 Correct 9 ms 1360 KB Output is correct
80 Correct 1089 ms 66380 KB Output is correct
81 Correct 1076 ms 66184 KB Output is correct
82 Correct 1062 ms 66716 KB Output is correct
83 Correct 1072 ms 67636 KB Output is correct
84 Correct 1075 ms 67240 KB Output is correct
85 Correct 1035 ms 67940 KB Output is correct
86 Correct 177 ms 23588 KB Output is correct
87 Correct 1 ms 332 KB Output is correct