Submission #719492

#	Time	Username	Problem	Language	Result	Execution time	Memory
719492		pavement	Remittance (JOI19_remittance)	C++17	0 / 100	1 ms	384 KiB

remittance

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace std;
using namespace __gnu_pbds;
#define int long long
#define mp make_pair
#define mt make_tuple
#define pb push_back
#define ppb pop_back
#define eb emplace_back
#define g0(a) get<0>(a)
#define g1(a) get<1>(a)
#define g2(a) get<2>(a)
#define g3(a) get<3>(a)
#define g4(a) get<4>(a)
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
using db = double;
using ll = long long;
using ld = long double;
using ii = pair<int, int>;
using iii = tuple<int, int, int>;
using iiii = tuple<int, int, int, int>;
using iiiii = tuple<int, int, int, int, int>;
template<class key, class value = null_type, class cmp = less<key> >
using ordered_set = tree<key, value, cmp, rb_tree_tag, tree_order_statistics_node_update>;

int N, C[1000005], F[1000005];

main() {
	ios::sync_with_stdio(0);
	cin.tie(0);
	cin >> N;
	for (int i = 1, A, B; i <= N; i++) {
		cin >> A >> B;
		C[i] = A - B;
	}
	for (int i = 1; i <= N; i++) {
		F[i] = (1 << i) * C[i] + F[i - 1];
	}
	// x = F[N] / (1 << N) + x / (1 << N)
	// x * (1 << N) = F[N] + x
	// x = (F[N]) / ((1 << N) - 1)
	if (F[N] % ((1 << N) - 1) || F[N] / ((1 << N) - 1) < 0) {
		cout << "No\n";
		return 0;
	}
	int x = F[N] / ((1 << N) - 1);
	for (int i = 1; i <= N; i++) {
		// x / (1 << i) + F[i] / (1 << i) to be an integer
		if ((x + F[i]) % (1 << i) || (x + F[i]) / (1 << i) < 0) {
			cout << "No\n";
			return 0;
		}
	}
	cout << "Yes\n";
}

Compilation message (stderr)

remittance.cpp:30:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   30 | main() {
      | ^~~~

• Subtask 1: 0 / 15
• Subtask 2: 0 / 40
• Subtask 3: 0 / 45