Codeforces Round #739 (Div. 3)

A. Dislike of Threes

B. Who's Opposite?

#include<bits/stdc++.h>
using namespace std;

int t, a, b, c;

int main() {
	cin >> t;
	for(int i = 1; i <= t; i++) {
		cin >> a >> b >> c;
		int d = max(a, b) - min(a, b);
		if(a > 2 * d || b > 2 * d || c > 2 * d) cout << "-1" << endl;
		else if(c > d && c <= d * 2) cout << c - d << endl;
		else if (c + d <= d * 2) cout << c + d << endl;
		else cout << "-1" << endl;
	}
	return 0;
}

C. Infinity Table

#include<bits/stdc++.h>
using namespace std;

int t, k;

void deal(int x) {
	int i;
	for(i = 1; i <= 100000; i++)
		if(i * i >= x) break;
	
	int tmp = i * i;
	int temp = i * i - i + 1;
	
	if(x >= temp) cout << i << " " << tmp - x + 1 << endl;
	else cout << i - temp + x << " " << i << endl;
}

int main() {
	cin >> t;
 	for(int i = 1; i <= t; i++) {
 		cin >> k;
 		deal(k);
	 }
 	return 0;
}

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来源： https://www.cnblogs.com/q1nghuan/p/15302765.html