# | Time | Username | Problem | Language | Result | Execution time | Memory |
---|---|---|---|---|---|---|---|
649764 | ToroTN | Strange Device (APIO19_strange_device) | C++14 | 472 ms | 16856 KiB |
This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include<bits/stdc++.h>
using namespace std;
#define ll long long
#define X first
#define Y second
#define pb push_back
ll n,a,b,x,y,md,cnt=0,mx=-1,l,r,di;
set<pair<ll,ll> > s;
vector<pair<ll,ll> > v;
int main()
{
scanf("%lld%lld%lld",&n,&a,&b);
/*for(int i=1;i<=100;i++)
{
printf("%d %d %d\n",i,(i+i/b)%a,i%b);
}*/
//printf("%d\n",s.size());
di=a/__gcd(b+1,a);
if(di>1e18/b)
{
md=1e18;
}else
{
md=di*b;
}
for(int i=1;i<=n;i++)
{
scanf("%lld%lld",&x,&y);
x%=md;
y%=md;
if(x<=y)
{
v.pb({x,y});
}else
{
v.pb({x,md-1});
v.pb({0,y});
}
}
sort(v.begin(),v.end());
for(int i=0;i<v.size();i++)
{
l=v[i].X;
r=v[i].Y;
if(l>mx)
{
cnt+=(r-l+1);
mx=r;
}else
{
if(r>mx)
{
cnt+=r-mx;
mx=r;
}
}
}
printf("%lld\n",cnt);
}
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