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| author | crupest <crupest@outlook.com> | 2021-03-09 16:57:08 +0800 |
|---|---|---|
| committer | crupest <crupest@outlook.com> | 2021-03-09 16:57:08 +0800 |
| commit | fdff564b14ea72719852a38e9eca7d61f2cf01af (patch) | |
| tree | 9fbf77db0b21c789f3e7cb6707b193e7b48dc718 | |
| parent | 2768b3fc1d7e6232ff703b6ac3a05b52745a4f97 (diff) | |
| download | crupest-fdff564b14ea72719852a38e9eca7d61f2cf01af.tar.gz crupest-fdff564b14ea72719852a38e9eca7d61f2cf01af.tar.bz2 crupest-fdff564b14ea72719852a38e9eca7d61f2cf01af.zip | |
import(solutions): Add problem 1221.
| -rw-r--r-- | works/solutions/acwing/1221.cpp | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/works/solutions/acwing/1221.cpp b/works/solutions/acwing/1221.cpp new file mode 100644 index 0000000..9ba4229 --- /dev/null +++ b/works/solutions/acwing/1221.cpp @@ -0,0 +1,45 @@ +#include <cmath>
+#include <iostream>
+
+const int M = 5000010;
+const int SM = std::sqrt(M / 2);
+
+int s[M];
+
+int main() {
+ int n;
+ std::cin >> n;
+
+ for (int i = 0; i <= SM; i++) {
+ const int i2 = i * i;
+ const int SMB = M - i2;
+ for (int j = i; j * j < SMB; j++) {
+ const int a = i2 + j * j;
+
+ if (s[a] == 0) {
+ s[a] = i + 1;
+ }
+ }
+ }
+
+ int sm = std::sqrt(n);
+
+ for (int a = 0; a <= sm; a++) {
+ int as = a * a;
+ int bsm = n - 3 * a * a;
+ for (int b = a; b * b <= bsm; b++) {
+ int bs = b * b + as;
+
+ int c = s[n - bs];
+
+ if (c != 0) {
+ c = c - 1;
+ std::cout << a << ' ' << b << ' ' << c << ' '
+ << std::sqrt(n - bs - c * c);
+ return 0;
+ }
+ }
+ }
+
+ return 0;
+}
|