Submission #857805

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Source Code Expand

#include<bits/stdc++.h>
using namespace std;
#define ll long long
#define f(i,x,n) for (int i = x;i < n;++i)

int main() {
	ll n, s;
	scanf("%lld%lld", &n, &s);
	int w = sqrt(n) + 1;
	f(i, 2, w + 1) {
		ll x = n, sum = 0;
		while (x) {
			sum += x%i;
			x /= i;
		}
		if (sum == s) { printf("%d", i); return 0; }
	}
	ll bg = w;
	for (; w > 0; --w) {
		ll r = n / w, l = n / (w + 1);
		l = max(l, bg);
		if (l > r)continue;
		ll d = n%r;
		ll x = s - w - d;
		if (x >= 0 && x%w == 0) { 
			ll an = r - x / w;
			if (an > l) { printf("%lld", an); return 0; }
		}
	}
	if (n == s)printf("%lld", n + 1);
	else printf("-1");
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:8:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  scanf("%lld%lld", &n, &s);
                           ^

Judge Result