이 제출은 이전 버전의 oj.uz에서 채점하였습니다. 현재는 제출 당시와는 다른 서버에서 채점을 하기 때문에, 다시 제출하면 결과가 달라질 수도 있습니다.
#include <bits/stdc++.h>
#define fi first
#define se second
#define pb push_back
#define int long long
#define lf (id<<1)
#define rg ((id<<1)|1)
#define md ((l+r)>>1)
using namespace std;
typedef pair<int,int> pii;
typedef pair<pii,int> ipii;
const int INF = 1e9+10;
const int MAXN = 1e6+10;
int n, a, b;
set <pii> s;
signed main() {
cin >> n >> a >> b;
for(int i=1; i<=n; i++){
int x, y; cin >> x >> y;
for(int j=x; j<=y; j++){
int le = ((j+j/b)%a);
int ri = j%b;
s.insert({le, ri});
}
}
cout << s.size() << '\n';
}
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