#pragma GCC optimize("Ofast")
#pragma GCC optimize("unroll-loops")
//#pragma GCC target("sse,sse2,sse3,ssse3,abm,mmx,tune=native")
//#pragma clang diagnostic ignored "-Wunused-const-variable"
#include<vector>
#include<iostream>
#include<stack>
#include<cmath>
#include<algorithm>
#include<set>
#include<map>
#include<string>
#include<tuple>
#include<bitset>
#include<queue>
#include<unordered_map>
#include<unordered_set>
#include<random>
#include<assert.h>
#include<ctime>
#include <cassert>
#include <thread>
#include <mutex>
#include <semaphore>
#include <chrono>
//#define int long long
#define all(a) a.begin(), a.end()
typedef long long ll;
typedef long double ld;
typedef unsigned long long ull;
using namespace std;
ll gcd(ll i, ll j) {
if (i < j)swap(i, j);
if (j == 0)return i;
else return gcd(j, i % j);
}
#ifdef _MY
ll __builtin_popcount(ll x) { return x ? (__builtin_popcount(x >> 1) + (x & 1)) : 0; }
#endif
template<typename T> inline T getint() {
T val = 0;
char c;
bool neg = false;
while ((c = getchar()) && !(c >= '0' && c <= '9')) {
neg |= c == '-';
}
do {
val = (val * 10) + c - '0';
} while ((c = getchar()) && (c >= '0' && c <= '9'));
return val * (neg ? -1 : 1);
}
const ll INF = 1e7 + 100;
const int mod = 998244353, mod1 = 1000000007;
const ld eps = 1e-7, pi = acos(-1);
const int maxT = 503, maxN = 5'010, A = 311;
ll bp(ll et, ll b) {
ll res = 1;
for (int i = 30; i >= 0; --i) {
res = (res * res) % mod;
if ((b & (1 << i)) != 0)res = (res * et) % mod;
}
return res;
}
mt19937 mt_rand(time(0));
void panic() {
cout << "No\n";
exit(0);
}
ld get_time() {
ll tmr = clock();
return (ld)tmr / CLOCKS_PER_SEC;
}
int pl(int a, int b) {
a += b;
if (a >= mod)
a -= mod;
return a;
}
int mul(ll a, ll b) {
return a * b % mod;
}
ll dp[maxN * maxN];
void solve() {
ll ans = 0;
ll n;
cin >> n;
for (int a = 1; a <= n; ++a) {
for (int b = a; b <= n; ++b) {
dp[a * a + b * b]++;
}
}
for (int res = 1; res <= n; ++res) {
for (int c = 1; c <= res; ++c) {
ans += dp[res * res - c * c];
}
}
cout << ans << "\n";
}
int32_t main()
{
ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
cout.precision(14);
#ifdef _MY
freopen("input.txt", "r", stdin);
freopen("output.txt", "w", stdout);
/*time_t start, end;
time(&start);*/
#else
//freopen("epic.in", "r", stdin); freopen("epic.out", "w", stdout);
#endif
// init();
int t = 1;
//cin >> t;
while (t--) {
solve();
}
#ifdef _MY
cout << "Time taken is : " << fixed << get_time() << " sec " << "\n";
#endif
return 0;
}
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 | #pragma GCC optimize("Ofast") #pragma GCC optimize("unroll-loops") //#pragma GCC target("sse,sse2,sse3,ssse3,abm,mmx,tune=native") //#pragma clang diagnostic ignored "-Wunused-const-variable" #include<vector> #include<iostream> #include<stack> #include<cmath> #include<algorithm> #include<set> #include<map> #include<string> #include<tuple> #include<bitset> #include<queue> #include<unordered_map> #include<unordered_set> #include<random> #include<assert.h> #include<ctime> #include <cassert> #include <thread> #include <mutex> #include <semaphore> #include <chrono> //#define int long long #define all(a) a.begin(), a.end() typedef long long ll; typedef long double ld; typedef unsigned long long ull; using namespace std; ll gcd(ll i, ll j) { if (i < j)swap(i, j); if (j == 0)return i; else return gcd(j, i % j); } #ifdef _MY ll __builtin_popcount(ll x) { return x ? (__builtin_popcount(x >> 1) + (x & 1)) : 0; } #endif template<typename T> inline T getint() { T val = 0; char c; bool neg = false; while ((c = getchar()) && !(c >= '0' && c <= '9')) { neg |= c == '-'; } do { val = (val * 10) + c - '0'; } while ((c = getchar()) && (c >= '0' && c <= '9')); return val * (neg ? -1 : 1); } const ll INF = 1e7 + 100; const int mod = 998244353, mod1 = 1000000007; const ld eps = 1e-7, pi = acos(-1); const int maxT = 503, maxN = 5'010, A = 311; ll bp(ll et, ll b) { ll res = 1; for (int i = 30; i >= 0; --i) { res = (res * res) % mod; if ((b & (1 << i)) != 0)res = (res * et) % mod; } return res; } mt19937 mt_rand(time(0)); void panic() { cout << "No\n"; exit(0); } ld get_time() { ll tmr = clock(); return (ld)tmr / CLOCKS_PER_SEC; } int pl(int a, int b) { a += b; if (a >= mod) a -= mod; return a; } int mul(ll a, ll b) { return a * b % mod; } ll dp[maxN * maxN]; void solve() { ll ans = 0; ll n; cin >> n; for (int a = 1; a <= n; ++a) { for (int b = a; b <= n; ++b) { dp[a * a + b * b]++; } } for (int res = 1; res <= n; ++res) { for (int c = 1; c <= res; ++c) { ans += dp[res * res - c * c]; } } cout << ans << "\n"; } int32_t main() { ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0); cout.precision(14); #ifdef _MY freopen("input.txt", "r", stdin); freopen("output.txt", "w", stdout); /*time_t start, end; time(&start);*/ #else //freopen("epic.in", "r", stdin); freopen("epic.out", "w", stdout); #endif // init(); int t = 1; //cin >> t; while (t--) { solve(); } #ifdef _MY cout << "Time taken is : " << fixed << get_time() << " sec " << "\n"; #endif return 0; } |
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