oj.uz

Submission #382522

# Submission time Handle Problem Language Result Execution time Memory
382522 2021-03-27T14:49:00 Z talant117408 Strange Device (APIO19_strange_device) C++17
5 / 100
 482 ms 32604 KB 
/*
    Code written by Talant I.D.
*/
#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>

using namespace __gnu_pbds;
using namespace std;

typedef long long ll;
typedef pair <int, int> pii;
typedef pair <ll, ll> pll;
typedef tree <pii, null_type, less <pii>, rb_tree_tag, tree_order_statistics_node_update> ordered_set;

#define precision(n) fixed << setprecision(n)
#define pb push_back
#define ub upper_bound
#define lb lower_bound
#define mp make_pair
#define eps (double)1e-9
#define PI 2*acos(0.0)
#define endl "\n"
#define sz(v) int((v).size())
#define all(v) v.begin(),v.end()
#define rall(v) v.rbegin(),v.rend()
#define do_not_disturb ios::sync_with_stdio(0);cin.tie(0);cout.tie(0);
#define OK cout << "OK" << endl;

const int mod = 1e9+7;

ll mode(ll a) {
    a %= mod;
    if (a < 0) a += mod;
    return a;
}

ll subt(ll a, ll b) {
    return mode(mode(a)-mode(b));
}

ll add(ll a, ll b) {
    return mode(mode(a)+mode(b));
}

ll mult(ll a, ll b) {
    return mode(mode(a)*mode(b));
}

ll binpow(ll a, ll b) {
    ll res = 1;
    while (b) {
        if (b&1) res = mult(res, a);
        a = mult(a, a);
        b >>= 1;
    }
    return res;
}

void usaco(string s) {
    freopen((s+".in").c_str(), "r", stdin);
    freopen((s+".out").c_str(), "w", stdout);
}

ll n, a, b;

ll A(ll x) {
    return (x+x/b)%a;
}

ll B(ll x) {
    return x%b;
}

int main() {
    do_not_disturb
    //~ usaco("dirtraverse");
    
    ll sum = 0;
    cin >> n >> a >> b;
    vector <pll> v(n), segs;
    for (auto &to : v) cin >> to.first >> to.second;
    for (auto to : v) sum += (to.second-to.first+1);
    
    if (b < 4 || a*b <= 1e6) {
        ll t = a*b;
        vector <pll> segs;
        bool flag = 0;
        for (auto to : v) {
            if (to.first/t == to.second/t) {
                segs.pb(mp(to.first%t, to.second%t));
            }
            else if (to.first/t+1 == to.second/t) {
                segs.pb(mp(to.first%t, t-1));
                segs.pb(mp(0, to.second%t));
            }
            else {
                flag = 1;
            }
        }
        if (flag) cout << t << endl;
        else {
            ll ans = 0;
            sort(all(segs));
            for (int i = 0, j = 0; i < sz(segs); i = j) {
                auto l = segs[i].first, r = segs[i].second;
                for ( ; j < sz(segs) && segs[j].first <= r; j++) {
                    r = max(r, segs[j].second);
                }
                ans += r-l+1;
            }
            cout << ans << endl;
        }
    }
    else if (sum <= 1e6+7) {
        set <pll> st;
        for (auto to : v) {
            for (ll j = to.first; j <= to.second; j++) {
                st.insert(mp((j+j/b)%a, j%b));
            }
        }
        cout << sz(st) << endl;
    }
    
    return 0;
}

Compilation message

strange_device.cpp: In function 'void usaco(std::string)':
strange_device.cpp:60:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   60 |     freopen((s+".in").c_str(), "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
strange_device.cpp:61:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   61 |     freopen((s+".out").c_str(), "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 48 ms 12524 KB Output is correct
3 Correct 70 ms 18156 KB Output is correct
4 Incorrect 1 ms 364 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #2
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Incorrect 1 ms 364 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 1 ms 364 KB Output is correct
2 Correct 2 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 337 ms 32544 KB Output is correct

Subtask #4
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 474 ms 32604 KB Output is correct
3 Incorrect 482 ms 32604 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #5
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 474 ms 32604 KB Output is correct
3 Incorrect 482 ms 32604 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #6
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 474 ms 32604 KB Output is correct
3 Incorrect 482 ms 32604 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #7
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Incorrect 38 ms 1900 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #8
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 48 ms 12524 KB Output is correct
3 Correct 70 ms 18156 KB Output is correct
4 Incorrect 1 ms 364 KB Output isn't correct
5 Halted 0 ms 0 KB -