Submission #1297408

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Source Code Expand

#include <stdio.h>
#include <algorithm>
using namespace std;
typedef long long ll;
ll f(ll a, ll b, ll c) {
	return max(max(a, b), c) - min(min(a, b), c);
}
ll solve(int n, int m) {
	ll ret = 1e18;
	for (int i = 1; i <= m; i++) {
		ll a1 = (ll)(n)*(i), a2, a3;
		{
			int low, m1, m2, high;
			low = 1, high = n;
			while (high - low > 10) {
				m1 = (low + high) / 2;
				m2 = m1 + 1;
				ll v1 = f(a1, (ll)(m - i)*m1, (ll)(m - i)*(n - m1));
				ret = min(ret, v1);
				ll v2 = f(a1, (ll)(m - i)*m2, (ll)(m - i)*(n - m2));
				ret = min(ret, v2);
				if (v1 <= v2) high = m2 - 1;
				else low = m1 + 1;
			}
			for (int j = low; j <= high; j++) {
				ll v1 = f(a1, (ll)(m - i)*j, (ll)(m - i)*(n - j));
				ret = min(ret, v1);
			}
		} {
			int low, m1, m2, high;
			low = i + 1, high = m;
			while (high - low > 10) {
				m1 = (low + high) / 2;
				m2 = m1 + 1;
				ll v1 = f(a1, (ll)(n)*(m1 - i), (ll)(n)*(m - m1));
				ret = min(ret, v1);
				ll v2 = f(a1, (ll)(n)*(m2 - i), (ll)(n)*(m - m2));
				ret = min(ret, v2);
				if (v1 <= v2) high = m2 - 1;
				else low = m1 + 1;
			}
			for (int j = low; j <= high; j++) {
				ll v1 = f(a1, (ll)(n)*(j - i), (ll)(n)*(m - j));
				ret = min(ret, v1);
			}
		}
	}
	return ret;
}
int main() {
	int n, m; scanf("%d%d", &n, &m);
	ll ans1, ans2;
	ans1 = solve(n, m);
	ans2 = solve(m, n);
	printf("%lld", min(ans1, ans2));
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:51:33: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  int n, m; scanf("%d%d", &n, &m);
                                 ^

Judge Result