oj.uz

Submission #887185

# Submission time Handle Problem Language Result Execution time Memory
887185 2023-12-14T02:25:23 Z Kutan Strange Device (APIO19_strange_device) C++14
10 / 100
 341 ms 58820 KB 
// Cao Quang Hung
#include <cassert>
#include <cctype>
#include <cerrno>
#include <cfloat>
#include <ciso646>
#include <climits>
#include <clocale>
#include <cmath>
#include <csetjmp>
#include <csignal>
#include <cstdarg>
#include <cstddef>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <ctime>
#include <ccomplex>
#include <cfenv>
#include <cinttypes>
#include <cstdbool>
#include <cstdint>
#include <ctgmath>
#include <cwchar>
#include <cwctype>
#include <algorithm>
#include <bitset>
#include <complex>
#include <deque>
#include <exception>
#include <fstream>
#include <functional>
#include <iomanip>
#include <ios>
#include <iosfwd>
#include <iostream>
#include <istream>
#include <iterator>
#include <limits>
#include <list>
#include <locale>
#include <map>
#include <memory>
#include <new>
#include <numeric>
#include <ostream>
#include <queue>
#include <set>
#include <sstream>
#include <stack>
#include <stdexcept>
#include <streambuf>
#include <string>
#include <typeinfo>
#include <utility>
#include <valarray>
#include <vector>
#include <array>
#include <atomic>
#include <chrono>
#include <condition_variable>
#include <forward_list>
#include <future>
#include <initializer_list>
#include <mutex>
#include <random>
#include <ratio>
#include <regex>
#include <scoped_allocator>
#include <system_error>
#include <thread>
#include <tuple>
#include <typeindex>
#include <type_traits>
#include <unordered_map>
#include <unordered_set>
 
using namespace std;
#define pb push_back
#define eb emplace_back
#define mp make_pair
#define pii pair<int,int>
#define pll pair<long long , long long>
#define vi vector<int>
#define vpii vector<pii>
#define SZ(x) ((int)(x.size()))
#define fi first
#define se second
#define IN(x,y) ((y).find((x))!=(y).end())
#define ALL(t) t.begin(),t.end()
#define FOREACH(i,t) for (typeof(t.begin()) i=t.begin(); i!=t.end(); i++)
#define REP(i,a,b) for(int (i)=(a);(i)<=(b);++i)
#define REPD(i,a,b) for(int (i)=(a); (i)>=(b);--i)
#define FOR(i, n) for (int (i) = 0; (i) < (n); ++(i))
#define dem(x) __builtin_popcount(x)
#define Mask(x) (1LL << (x))
#define BIT(x, i) ((x) >> (i) & 1)
#define ln '\n'
#define io_faster ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0);
///mt19937 rnd(time(0));
 
const int INF = 1e9 , mod = 1e9 + 7;
 
template <class T1, class T2>
inline T1 mul(T1& x, const T2 &k){ return x = (1LL * x * k) % mod; }
 
template <class T1 , class T2>
inline T1 pw(T1 x, T2 k){T1 res = 1; for (; k ; k >>= 1){ if (k & 1) mul(res, x); mul(x, x); } return res;}
 
template <class T>
inline bool minimize(T &x, const T &y){ if (x > y){x = y; return 1;} return 0; }
 
template <class T>
inline bool maximize(T &x, const T &y){ if (x < y){x = y; return 1;} return 0; }
 
template <class T>
inline void add(T &x , const T &y){ if ((x += y) >= mod) x -= mod; }
 
template <class T>
inline T product (const T &x , const T &y) { return 1LL * x * y % mod; }
 
#define PROB "a"
void file(){
    if(fopen(PROB".inp", "r")){
        freopen(PROB".inp","r",stdin);
        freopen(PROB".out","w",stdout);
    }
}
void sinh_(){
//    srand(time(0));
//    freopen(PROB".inp" , "w" , stdout);
//    int n;
}
 
typedef long long ll;
typedef double db;
const int N = 1e6 + 5;
 
int n;
ll A, B, l[N], r[N];
 
void readip(){
    cin >> n >> A >> B;
    REP(i, 1, n) cin >> l[i] >> r[i];
}
 
namespace sub1{
    bool check() {
        ll s = 0;
        REP(i, 1, n) s += r[i] - l[i] + 1;
        return s <= 1e6;
    }
 
    void solve() {
        vector<pair<ll, ll>> distinct;
        REP(i, 1, n) {
            for (ll x = l[i]; x <= r[i]; ++x) 
                distinct.eb((x + x / B) % A , x % B);
        }
        sort(ALL(distinct));
        distinct.erase(unique(ALL(distinct)), distinct.end());
        cout << distinct.size() << ln;
    }
};
 
namespace sub2{
    void solve() {
        if (A & 1) {
            // cycle size A
            vector<pair<ll, ll>> segments[2];
            REP(i, 1, n) {
                ll lef = (2LL * l[i]) % A, rig = (2LL * r[i]) % A;
                if (lef % 2 != rig % 2) {
                    if (lef % 2 == 0) {
                        segments[0].eb(lef, A - 1);
                        segments[1].eb(1, rig);
                    }
                    else {  
                        segments[1].eb(lef, A - 2);
                        segments[0].eb(0, rig);
                    }
                }
                else segments[lef % 2].eb(lef, rig);
            }       
        
            ll res = 0;
            FOR(i, 2) {
                if (segments[i].empty()) continue;
                sort(ALL(segments[i]));
                vector<pair<ll, ll>> hihi;
                hihi.eb(segments[i][0]);
                for (int j = 1; j < segments[i].size(); ++j) {
                    ll r = segments[i][j].second;
                    ll l = segments[i][j].first;
                    if (r <= hihi.back().se) continue;
                    if (l <= hihi.back().se) hihi.back().se = r;
                    else hihi.eb(l, r);
                }
                for (auto it : hihi)
                    res += (it.se - it.fi) / 2 + 1;
            }
            cout << res << ln;
        }
        else {  
            // cycle size A / 2
            vector<pair<ll, ll>> segments;
            REP(i, 1, n) {
                ll lef = (2LL * l[i]) % A;
                ll rig = (2LL * r[i]) % A;
                ll tmp = (A - lef) / 2;
                if (r[i] - l[i] + 1 <= tmp) {
                    segments.eb(lef, rig);
                }
                else {
                    segments.eb(lef, A - 2);
                    segments.eb(0, rig);
                }
            }
            ll res = 0;
            if (segments.empty()) {
                cout << 0 << ln;
                return;
            }
            vector<pair<ll, ll>> hihi;
            hihi.eb(segments[0]);
            REP(i, 1, segments.size() - 1) {
                ll r = segments[i].second;
                    ll l = segments[i].first;
                    if (r <= hihi.back().se) continue;
                    if (l <= hihi.back().se) hihi.back().se = r;
                    else hihi.eb(l, r);
            }
              for (auto it : hihi)
                    res += (it.se - it.fi) / 2 + 1;
            cout << res << ln;
        }
    }
};
void solve(){       
    if (sub1::check()) {
        sub1::solve();
        return;
    }    
 
    if (B == 1) {
        sub2::solve();
        return;
    }
 
    // int m = 50;
    // for (int i = 35; i <= 10000; i += m) {
    //     REP(j, 0, m - 1) cout << ((i + j)  * 2) % m << ' ';
    //     cout << ln;
    // }
}
 
int main(){
    sinh_();
    io_faster
    file();
    int t = 1;
//    cin >> t;
    while (t--){
        readip();
        solve();
    }
}

Compilation message

strange_device.cpp: In function 'void readip()':
strange_device.cpp:92:28: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
   92 | #define REP(i,a,b) for(int (i)=(a);(i)<=(b);++i)
      |                            ^
strange_device.cpp:144:5: note: in expansion of macro 'REP'
  144 |     REP(i, 1, n) cin >> l[i] >> r[i];
      |     ^~~
strange_device.cpp: In function 'bool sub1::check()':
strange_device.cpp:92:28: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
   92 | #define REP(i,a,b) for(int (i)=(a);(i)<=(b);++i)
      |                            ^
strange_device.cpp:150:9: note: in expansion of macro 'REP'
  150 |         REP(i, 1, n) s += r[i] - l[i] + 1;
      |         ^~~
strange_device.cpp: In function 'void sub1::solve()':
strange_device.cpp:92:28: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
   92 | #define REP(i,a,b) for(int (i)=(a);(i)<=(b);++i)
      |                            ^
strange_device.cpp:156:9: note: in expansion of macro 'REP'
  156 |         REP(i, 1, n) {
      |         ^~~
strange_device.cpp: In function 'void sub2::solve()':
strange_device.cpp:92:28: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
   92 | #define REP(i,a,b) for(int (i)=(a);(i)<=(b);++i)
      |                            ^
strange_device.cpp:171:13: note: in expansion of macro 'REP'
  171 |             REP(i, 1, n) {
      |             ^~~
strange_device.cpp:94:28: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
   94 | #define FOR(i, n) for (int (i) = 0; (i) < (n); ++(i))
      |                            ^
strange_device.cpp:187:13: note: in expansion of macro 'FOR'
  187 |             FOR(i, 2) {
      |             ^~~
strange_device.cpp:192:35: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  192 |                 for (int j = 1; j < segments[i].size(); ++j) {
      |                                 ~~^~~~~~~~~~~~~~~~~~~~
strange_device.cpp:92:28: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
   92 | #define REP(i,a,b) for(int (i)=(a);(i)<=(b);++i)
      |                            ^
strange_device.cpp:207:13: note: in expansion of macro 'REP'
  207 |             REP(i, 1, n) {
      |             ^~~
strange_device.cpp:92:28: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
   92 | #define REP(i,a,b) for(int (i)=(a);(i)<=(b);++i)
      |                            ^
strange_device.cpp:226:13: note: in expansion of macro 'REP'
  226 |             REP(i, 1, segments.size() - 1) {
      |             ^~~
strange_device.cpp:92:39: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   92 | #define REP(i,a,b) for(int (i)=(a);(i)<=(b);++i)
      |                                    ~~~^~~~~
strange_device.cpp:226:13: note: in expansion of macro 'REP'
  226 |             REP(i, 1, segments.size() - 1) {
      |             ^~~
strange_device.cpp: In function 'void file()':
strange_device.cpp:125:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  125 |         freopen(PROB".inp","r",stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
strange_device.cpp:126:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  126 |         freopen(PROB".out","w",stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2392 KB Output is correct
2 Correct 22 ms 8148 KB Output is correct
3 Correct 32 ms 10960 KB Output is correct
4 Correct 2 ms 2784 KB Output is correct
5 Correct 1 ms 2396 KB Output is correct
6 Correct 1 ms 2396 KB Output is correct
7 Correct 1 ms 2652 KB Output is correct
8 Correct 1 ms 2396 KB Output is correct
9 Correct 7 ms 3596 KB Output is correct
10 Correct 1 ms 2396 KB Output is correct
11 Correct 0 ms 2396 KB Output is correct
12 Correct 0 ms 2396 KB Output is correct
13 Correct 0 ms 2392 KB Output is correct
14 Correct 1 ms 2396 KB Output is correct
15 Correct 33 ms 12240 KB Output is correct
16 Correct 13 ms 4568 KB Output is correct
17 Correct 38 ms 8920 KB Output is correct
18 Correct 1 ms 2396 KB Output is correct

Subtask #2
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Incorrect 0 ms 2396 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #3
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 62 ms 20428 KB Output is correct
3 Correct 72 ms 20928 KB Output is correct
4 Correct 66 ms 19144 KB Output is correct
5 Incorrect 165 ms 16004 KB Output isn't correct
6 Halted 0 ms 0 KB -

Subtask #4
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2392 KB Output is correct
2 Correct 341 ms 58820 KB Output is correct
3 Incorrect 244 ms 34500 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 2392 KB Output is correct
2 Correct 341 ms 58820 KB Output is correct
3 Incorrect 244 ms 34500 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 2392 KB Output is correct
2 Correct 341 ms 58820 KB Output is correct
3 Incorrect 244 ms 34500 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 2396 KB Output is correct
2 Incorrect 23 ms 6784 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 2392 KB Output is correct
2 Correct 22 ms 8148 KB Output is correct
3 Correct 32 ms 10960 KB Output is correct
4 Correct 2 ms 2784 KB Output is correct
5 Correct 1 ms 2396 KB Output is correct
6 Correct 1 ms 2396 KB Output is correct
7 Correct 1 ms 2652 KB Output is correct
8 Correct 1 ms 2396 KB Output is correct
9 Correct 7 ms 3596 KB Output is correct
10 Correct 1 ms 2396 KB Output is correct
11 Correct 0 ms 2396 KB Output is correct
12 Correct 0 ms 2396 KB Output is correct
13 Correct 0 ms 2392 KB Output is correct
14 Correct 1 ms 2396 KB Output is correct
15 Correct 33 ms 12240 KB Output is correct
16 Correct 13 ms 4568 KB Output is correct
17 Correct 38 ms 8920 KB Output is correct
18 Correct 1 ms 2396 KB Output is correct
19 Correct 1 ms 2396 KB Output is correct
20 Incorrect 0 ms 2396 KB Output isn't correct
21 Halted 0 ms 0 KB -