Submission #856084

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Source Code Expand

#include<cstdio>
#include<cstring>
#include<cmath>
#include<set>
#include<map>
#include<queue>
#include<vector>
#include<algorithm>
#include<iostream>
#include<string>
#include<assert.h>
#include<sstream>
using namespace std;
#define pb push_back
#define mp make_pair
#define sz(x) ((int)(x).size())
#define rep(i,l,r) for(int i=(l);i<(r);++i)
#define setIO(x) freopen(x".in","r",stdin);freopen(x".out","w",stdout);
typedef long long ll;
typedef pair<int, int> pii;
const ll LINF = 1e18 + 7;
const int N = 55;
const int INF = 1e9 + 7;
const int MOD = 1e9 + 7;
const double EPS = 1e-8;
//-------------head-------------
ll n, s;
ll f(ll b, ll n) {
	if (n < b)
		return n;
	return f(b, n / b) + n % b;
}
ll solve() {
	ll ret = -1, sn = floor(sqrt(n));
	if (n >= s) {
		ll d = n - s;
		for (ll b = 1, B = sqrt(d); b <= B; ++b)
			if (d % b == 0) {
				ll _b = b;
				if (_b > sn && d / _b == n / (_b + 1)) {
					if (ret == -1 || ret > _b + 1)
						ret = _b + 1;
				}
				_b = d / b;
				if (_b > sn && d / _b == n / (_b + 1)) {
					if (ret == -1 || ret > _b + 1)
						ret = _b + 1;
				}
			}
	}
	for (ll b = 2, B = sn; b <= B; ++b)
		if (f(b, n) == s) {
			if (ret == -1 || ret > b)
				ret = b;
			break;
		}
	if (n == s && ret == -1)
		ret = n + 1;
	return ret;
}
int main() {
	scanf("%lld%lld", &n, &s);
	printf("%lld", solve());
	return 0;
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:62:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  scanf("%lld%lld", &n, &s);
                           ^

Judge Result