#include <iostream>
#include <vector>
#include <array>
#define ll long long
using namespace std;
ll n, a, b;
bool B;
vector <ll> V;
__int128 z, x, y, l, r, f;
vector<array<__int128, 2>> A;
int main() {
cin >> n >> a >> b;
x = a;
y = b;
z = x*y;
for (int i=0; i<n; ++i) {
cin >> a >> b;
x = a, y = b;
l = y-x;
x %= z;
if (x+l >= z) {
l -= z;
l = min(l, z-1);
A.push_back({x, z-1});
A.push_back({0, l});
}
else A.push_back({x, x+l});
}
sort(A.begin(), A.end());
l = r = -1e9;
++l;
for (auto [u, v] : A) {
if (r+1 < u) {
f += r-l+1;
l = u, r = v;
}
else r = max(r, v);
}
f += (r-l)+1;
while (f) {
V.push_back(f%10);
f /= 10;
}
reverse(V.begin(), V.end());
for (auto u : V) {
cout << u;
}
cout << '\n';
}
Compilation message
strange_device.cpp: In function 'int main()':
strange_device.cpp:31:3: error: 'sort' was not declared in this scope; did you mean 'qsort'?
31 | sort(A.begin(), A.end());
| ^~~~
| qsort
strange_device.cpp:34:13: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
34 | for (auto [u, v] : A) {
| ^
strange_device.cpp:46:3: error: 'reverse' was not declared in this scope
46 | reverse(V.begin(), V.end());
| ^~~~~~~
