제출 #977111

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
977111		notyou	Strange Device (APIO19_strange_device)	C++17	0 / 100	214 ms	600 KiB

strange_device

#include <bits/stdc++.h>

// #include <ext/pb_ds/assoc_container.hpp>
// #include <ext/pb_ds/tree_policy.hpp>

#define ll long long
#define pb push_back
#define vl vector<ll>
#define fi first
#define se second
#define in insert
#define all(v) v.begin(), v.end()
#define bpc(x) __builtin_popcount(x)
#define endl "\n"

using namespace std;
const ll inf = 1e18;
const ll mod = 1e9 + 7;
const int sz = 4e5 + 5;
const int LG = 21;
// using namespace __gnu_pbds;
// tree <ll, null_type, less<ll>, rb_tree_tag, tree_order_statistics_node_update> rbt;
void solve(){
    ll n, A, B, i, l, r, s = 0;
    cin >> n >> A >> B;
    ll mx = (A * B);
    for(i = 1; i <= n; i++){
        cin >> l >> r;
        s += min((r - l + 1), mx);
    }
    if(B + 1 == A){
        s = B;
    }
    cout << s << endl;

}
int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);
    ll t = 1;
    // cin >> t;
    while(t--){
        solve();
    }
}
/*

4 100
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4 100

60 20
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30 70
*/

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