Submission #982485

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
982485	2024-05-14 09:54:15	vjudge1	Strange Device (APIO19_strange_device)	C++17	100 / 100	414 ms	53792 KiB

strange_device

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#include<bits/stdc++.h>
#define f first
#define s second
#define ll long long
#define pb push_back
#define pii pair<int,int>
#define pll pair<ll,ll>
#define sz(x) (int)x.size()
#define all(x) x.begin(),x.end()
#define vi vector<int>
#define vvi vector<vi>
#define vll vector<ll>
using namespace std;
int main(){
    ios_base::sync_with_stdio(0);cin.tie(0);
    ll n,a,b,d;cin>>n>>a>>b;d=a/__gcd(a,b+1);
    vector<pll>rq;
    for(int i=1;i<=n;i++){
        ll l,r;cin>>l>>r;
        ll tl=l/d;tl/=b;
        ll tr=r/d;tr/=b;
        if(tl==tr)rq.pb({l%(d*b),r%(d*b)});
        else if(tl==tr-1)rq.pb({l%(d*b),d*b-1}),rq.pb({0,r%(d*b)});
        else {cout<<d*b;return 0;}
    }sort(rq.begin(),rq.end());ll ans=0,cur=-1;
    for(int i=0;i<rq.size();i++){
        ans+=max(rq[i].s-max(rq[i].f-1,cur),1ll*0);
        cur=max(cur,rq[i].s);
    }cout<<ans;
}
 
 
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Compilation message (stderr)

strange_device.cpp: In function 'int main()':
strange_device.cpp:26:18: 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]
   26 |     for(int i=0;i<rq.size();i++){
      |                 ~^~~~~~~~~~

• 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