Submission #400025

#	Time	Username	Problem	Language	Result	Execution time	Memory
400025		teehandsome	Strange Device (APIO19_strange_device)	C++17	10 / 100	5050 ms	524292 KiB

strange_device

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#define endl '\n'
#define INF 1e9+7
#define all(x) x.begin(),x.end()
using namespace std;
using namespace __gnu_pbds;
using ll=long long;
using pii=pair<int,int>;
using ppi=pair<int,pii>;
using oset=tree<int,null_type,less<int>,rb_tree_tag,tree_order_statistics_node_update>;

template<typename T>
void _print(vector<T> x) {cerr<<"{"; for(auto e:x) cerr<<e<<","; cerr<<"}";}
void _print(pii x) {cerr<<"{"<<x.first<<","<<x.second<<"}";}
template<typename T>
void _print(T x) {cerr<<x;}

void dbg() {cerr<<endl;}
template<typename Head,typename... Tail>
void dbg(Head H,Tail... T) {
    _print(H);
    if(sizeof...(T)) cerr<<",";
    else cerr<<"\"]";
    dbg(T...);
}
#define debug(...) cerr<<"["<<#__VA_ARGS__<<"]:[\"",dbg(__VA_ARGS__)

//mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());

using pll=pair<ll,ll>;
set<pll> s;

int main () {
    ios::sync_with_stdio(false); cin.tie(0);
    ll n,a,b; cin>>n>>a>>b;
    ll ans=0;
    for(ll i=0;i<n;i++) {
        ll l,r; cin>>l>>r;
        for(ll j=l;j<=r;j++) {
            ll x=(j+(j/b))%a;
            ll y=j%b;
            s.insert({x,y});
        }
    }
    cout<<s.size()<<endl;
}

Compilation message (stderr)

strange_device.cpp: In function 'int main()':
strange_device.cpp:38:8: warning: unused variable 'ans' [-Wunused-variable]
   38 |     ll ans=0;
      |        ^~~

• Subtask 1: 10 / 10
• Subtask 2: 0 / 5
• Subtask 3: 0 / 5
• Subtask 4: 0 / 5
• Subtask 5: 0 / 5
• Subtask 6: 0 / 20
• Subtask 7: 0 / 20
• Subtask 8: 0 / 30