Submission #902306

#	Time	Username	Problem	Language	Result	Execution time	Memory
902306		Boycl07	Strange Device (APIO19_strange_device)	C++17	100 / 100	625 ms	70436 KiB

strange_device

#include <bits/stdc++.h>

using namespace std;

typedef long long ll;

#define int ll
#define rep(i, n) for(int i = 1; i <= n; ++i)
#define forn(i, l, r) for(int i = l; i <= r; ++i)
#define ford(i, r, l) for(int i = r; i >= l; --i)
#define FOR(i, n) for(int i = 0; i < n; ++i)
#define fi first
#define se second
#define pii pair<int, int>
#define pll pair<ll, ll>
#define pb push_back
#define endl "\n"
#define task ""
#define sz(a) int(a.size())
#define C(x, y) make_pair(x, y)
#define all(a) (a).begin(), (a).end()
#define bit(i, mask) (mask >> i & 1)

template<typename T> bool maximize(T &res, const T &val) { if (res < val){ res = val; return true; }; return false; }
template<typename T> bool minimize(T &res, const T &val) { if (res > val){ res = val; return true; }; return false; }

inline int readInt()       {char c;while(c=getchar(),c!='-'&&(c<'0'||c>'9'));bool sign=(c=='-');if(sign)c=getchar();int n=c-'0';while(c=getchar(),c>='0'&&c<='9')n=10*n+c-'0';return(!sign)?n:-n;}
inline ll readLong()       {char c;while(c=getchar(),c!='-'&&(c<'0'||c>'9'));bool sign=(c=='-');if(sign)c=getchar();ll  n=c-'0';while(c=getchar(),c>='0'&&c<='9')n=10*n+c-'0';return(!sign)?n:-n;}
inline string readString() {char c;while(c=getchar(),c==' '||c=='\n'||c=='\t');string s({c});while(c=getchar(),c!=EOF&&c!=' '&&c!='\n'&&c!='\t')s+=c;return s;}


const int N =  2e5 + 10;
const int M = 1e3 + 3;
const int N1 = 2e3 + 10;
const int K = 1e2 + 1;
const int MOD = 1e9 + 7;
const ll INF = 1e18;
const ll LINF = 1e17 + 2;
const int block_size = 500;
const int LOG = 29;
const int offset = N;
const int LIM = 1e4 ;
const int AL = 26;

int n;
ll a, b;

vector<pii> p;

void add(int l, int r)
{
    p.pb({l, 1});
    p.pb({r + 1, -1});
}

void solve()
{
    cin >> n >> a >> b;
	ll period = a / __gcd(a, b + 1)  > INF / b ? INF : a / __gcd(a, b + 1) * b;
    rep(i, n)
    {
        ll l, r;
        cin >> l >> r;
        if(r - l + 1 >= period) return cout << period, void();
        l %= period;
        r %= period;
        if(l > r)
            add(0, r), add(l, period - 1);
        else
            add(l, r);
    }
    sort(all(p));
    int cnt = 0;
    ll last = 0;
    ll res = 0;
    for(int i = 0; i < sz(p); ++i)
    {
        int j = i;
        if(i > 0 && cnt)
            res += (p[i].fi - p[i - 1].fi);
        while(j < sz(p) && p[i].fi == p[j].fi)
        {
            cnt += p[j].se;
            ++j;
        }
        i = j - 1;
    }
    cout << res;
}

signed main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0); cout.tie(0);

    int TC = 1;


    while(TC--)
    {
        solve();
        cout << endl;
    }

    return 0;
}
//ha

Compilation message (stderr)

strange_device.cpp: In function 'void solve()':
strange_device.cpp:74:8: warning: unused variable 'last' [-Wunused-variable]
   74 |     ll last = 0;
      |        ^~~~

• Subtask 1: 10 / 10
• Subtask 2: 5 / 5
• Subtask 3: 5 / 5
• Subtask 4: 5 / 5
• Subtask 5: 5 / 5
• Subtask 6: 20 / 20
• Subtask 7: 20 / 20
• Subtask 8: 30 / 30