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Submission #663168

# Submission time Handle Problem Language Result Execution time Memory
663168 2022-11-26T16:20:38 Z Ai7081 Strange Device (APIO19_strange_device) C++17
65 / 100
 422 ms 16908 KB 
#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define pii pair<ll, ll>

const ll inf = 5e18 + 7;

ll n, a, b, l, r, p;
vector<pii> v;

ll gcd(ll c1, ll c2) {
    if (!c2) return c1;
    return gcd(c2, c1%c2);
}

ll lcm(ll c1, ll c2) {
    ll ans = c1 / gcd(c1, c2);
    if (inf / ans < c2) return inf;
    return ans * c2;
}

int main() {
    ios_base::sync_with_stdio(false); cin.tie(0);
    cin >> n >> a >> b;
    p = lcm(b+1, a);
    p = (p==inf ? inf : (p/(b+1))*b);
    while (n--) {
        cin >> l >> r, l%=p, r%=p;
        if (l>r) v.push_back({0,r}), v.push_back({l,p-1});
        else v.push_back({l,r});
    }
    sort(v.begin(), v.end());
    ll out=0, ma=-1;
    for (auto [x,y]:v) out += (ma<x ? y-x+1 : max((ll)0,y-ma)), ma=max(ma,y);
    cout << out;
    return 0;
}

/*
3 3 3
4 4
7 9
17 18
ans: 4

3 5 10
1 20
50 68
89 98
ans: 31

1 1000000000000000 1000000000000000000
100000 1000000
*/

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 4 ms 600 KB Output is correct
3 Correct 4 ms 600 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 0 ms 212 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 0 ms 212 KB Output is correct
13 Correct 1 ms 212 KB Output is correct
14 Correct 1 ms 212 KB Output is correct
15 Correct 0 ms 212 KB Output is correct
16 Correct 4 ms 600 KB Output is correct
17 Correct 40 ms 2464 KB Output is correct
18 Correct 0 ms 212 KB Output is correct

Subtask #2
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Incorrect 0 ms 212 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #3
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 274 ms 16780 KB Output is correct

Subtask #4
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 373 ms 16808 KB Output is correct
3 Correct 358 ms 16812 KB Output is correct
4 Correct 358 ms 16804 KB Output is correct

Subtask #5
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 373 ms 16808 KB Output is correct
3 Correct 358 ms 16812 KB Output is correct
4 Correct 358 ms 16804 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 364 ms 16856 KB Output is correct
7 Correct 370 ms 16852 KB Output is correct
8 Correct 355 ms 16824 KB Output is correct
9 Correct 397 ms 16852 KB Output is correct

Subtask #6
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 373 ms 16808 KB Output is correct
3 Correct 358 ms 16812 KB Output is correct
4 Correct 358 ms 16804 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 39 ms 2508 KB Output is correct
7 Correct 39 ms 2424 KB Output is correct
8 Correct 38 ms 2532 KB Output is correct
9 Correct 36 ms 2512 KB Output is correct
10 Correct 36 ms 2512 KB Output is correct
11 Correct 37 ms 2512 KB Output is correct
12 Correct 35 ms 2456 KB Output is correct
13 Correct 37 ms 2408 KB Output is correct
14 Correct 36 ms 2528 KB Output is correct
15 Correct 40 ms 2444 KB Output is correct
16 Correct 38 ms 2472 KB Output is correct
17 Correct 37 ms 2472 KB Output is correct
18 Correct 378 ms 16852 KB Output is correct
19 Correct 366 ms 16908 KB Output is correct
20 Correct 401 ms 16776 KB Output is correct
21 Correct 38 ms 2408 KB Output is correct
22 Correct 35 ms 2512 KB Output is correct
23 Correct 115 ms 8664 KB Output is correct

Subtask #7
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 39 ms 2512 KB Output is correct
3 Correct 39 ms 2492 KB Output is correct
4 Correct 422 ms 16812 KB Output is correct
5 Correct 39 ms 2512 KB Output is correct
6 Correct 51 ms 2492 KB Output is correct
7 Correct 41 ms 2504 KB Output is correct
8 Correct 45 ms 2568 KB Output is correct
9 Correct 39 ms 2472 KB Output is correct
10 Correct 39 ms 2500 KB Output is correct
11 Correct 39 ms 2416 KB Output is correct
12 Correct 40 ms 2428 KB Output is correct
13 Correct 39 ms 2512 KB Output is correct
14 Correct 412 ms 16804 KB Output is correct
15 Correct 40 ms 2512 KB Output is correct
16 Correct 385 ms 16828 KB Output is correct
17 Correct 380 ms 16784 KB Output is correct
18 Correct 0 ms 212 KB Output is correct

Subtask #8
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 4 ms 600 KB Output is correct
3 Correct 4 ms 600 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 0 ms 212 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 0 ms 212 KB Output is correct
13 Correct 1 ms 212 KB Output is correct
14 Correct 1 ms 212 KB Output is correct
15 Correct 0 ms 212 KB Output is correct
16 Correct 4 ms 600 KB Output is correct
17 Correct 40 ms 2464 KB Output is correct
18 Correct 0 ms 212 KB Output is correct
19 Correct 1 ms 212 KB Output is correct
20 Incorrect 0 ms 212 KB Output isn't correct
21 Halted 0 ms 0 KB -