#include <bits/stdc++.h>
using namespace std;
// Typedef
typedef string str;
typedef long double ld;
typedef long long int int64;
typedef unsigned long long int uint64;
typedef std::pair<int, int> PII;
typedef std::pair<int64, int64> PLL;
typedef std::vector<int> VI;
typedef std::vector<long long> VLL;
// Define For-loop
#define FOR(i, j, k, in) for (int i = (j); i < (k) ; i += (in))
#define FORW(i, j, k, in) for (int i = (j); i <= (k); i += (in))
#define RFOR(i, j, k, in) for (int i = (j); i >= (k); i -= (in))
// Define Data structure func
#define all(cont) cont.begin(), cont.end()
#define rall(cont) cont.rbegin(), cont.rend()
#define sz(cont) int((cont).size())
#define pb push_back
#define mp make_pair
#define fi first
#define se second
// Define number
#define IINF 0x3f3f3f3f
#define LLINF 1000111000111000111LL
#define PI 3.1415926535897932384626433832795
// Other
#define lend '\n'
#define hardio(name) freopen(name".inp","r",stdin), freopen(name".out","w",stdout);
void FastIO() { std::ios_base::sync_with_stdio(false); std::cin.tie(NULL); cin.exceptions(cin.failbit); srand(time(NULL)); }
const int MOD = 1e9 + 7, MOD2 = 1e9 + 9;
// ======================================================================
namespace io { const int SIZE = (1 << 20) + 1;
char ibuf[SIZE], *iS, *iT, obuf[SIZE], *oS = obuf, *oT = oS + SIZE - 1, c, qu[55]; int f, qr;
#define gc() (iS == iT ? (iT = (iS = ibuf) + fread (ibuf, 1, SIZE, stdin), (iS == iT ? EOF : *iS ++)) : *iS ++)
inline void flush() { fwrite (obuf, 1, oS - obuf, stdout); oS = obuf; } // print the remaining part
inline void putc(char x) { *oS++ = x; if (oS == oT) flush (); } // putchar
template<typename A> inline bool read (A &x) {
for (f = 1, c = gc(); c < '0' || c > '9'; c = gc()) if (c == '-') f = -1; else if (c == EOF) return 0;
for (x = 0; c <= '9' && c >= '0'; c = gc()) x = x * 10 + (c & 15); x *= f;
return 1; }
inline bool read(char &x) { while((x = gc()) == ' ' || x == '\n' || x == '\r'); return x != EOF; }
inline bool read(string& x) {
while ((c = gc()) == '\n' || c == ' '|| c == '\r'); if (c == EOF) return 0; x.clear();
while (!(c == '\n' || c == ' ' || c == '\r' || c == EOF)) x.push_back(c), c = gc(); return 1;
}
template<typename A,typename ...B>
inline bool read(A &x, B &...y) { return read(x) + read(y...); }
template<typename A> inline bool write(A x) {
if (!x) putc('0'); if (x < 0) putc ('-'), x = -x;
while (x) qu[++qr] = x % 10 + '0', x /= 10;
while (qr) putc(qu[qr--]);
return 0; }
inline bool write(char x) { putc(x); return 0; }
inline bool write(const char *x){ while (*x){ putc(*x); ++x; } return 0; }
inline bool write(char *x){ while (*x){ putc(*x); ++x; } return 0; }
template<typename A,typename ...B>
inline bool write(A x,B ...y){ return write(x) || write(y...); }
//no need to call flush at the end manually!
struct Flusher_ {~Flusher_(){ flush(); }} io_flusher_;
} using io::read; using io::putc; using io::write;
int l, r;
vector<int> pr;
void sieve(int N = sqrt(1e9)) {
int lp[N + 12] = {};
FORW(i, 2, N, 1) {
if (lp[i] == 0)
lp[i] = i, pr.pb(i);
for(int j = 0; j < pr.size() && pr[j] <= lp[i] && 1ll*i*pr[j] <= N; ++j)
lp[i * pr[j]] = pr[j];
}
}
int sum[10000007] = {};
int main(int argc, char* argv[]) {
FastIO();
read(l, r);
sieve(r);
FORW(i, 1, r, 1) sum[i] = 1;
for(int p : pr) {
int64 sm = 1;
for(int64 x = p; x <= r; x *= p) {
for(int64 y = x; y <= r; y += x) {
sum[y] /= sm;
sum[y] *= (sm + x);
}
sm += x;
}
}
int64 ans = 0;
FORW(i, l, r, 1) ans += abs(2 * i - sum[i]);
write(ans);
return 0; }
Compilation message
savrsen.cpp: In function 'bool io::read(A&)':
savrsen.cpp:43:9: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
43 | for (x = 0; c <= '9' && c >= '0'; c = gc()) x = x * 10 + (c & 15); x *= f;
| ^~~
savrsen.cpp:43:76: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for'
43 | for (x = 0; c <= '9' && c >= '0'; c = gc()) x = x * 10 + (c & 15); x *= f;
| ^
savrsen.cpp: In function 'bool io::read(std::string&)':
savrsen.cpp:47:9: warning: this 'while' clause does not guard... [-Wmisleading-indentation]
47 | while ((c = gc()) == '\n' || c == ' '|| c == '\r'); if (c == EOF) return 0; x.clear();
| ^~~~~
savrsen.cpp:47:61: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'while'
47 | while ((c = gc()) == '\n' || c == ' '|| c == '\r'); if (c == EOF) return 0; x.clear();
| ^~
savrsen.cpp:48:9: warning: this 'while' clause does not guard... [-Wmisleading-indentation]
48 | while (!(c == '\n' || c == ' ' || c == '\r' || c == EOF)) x.push_back(c), c = gc(); return 1;
| ^~~~~
savrsen.cpp:48:93: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'while'
48 | while (!(c == '\n' || c == ' ' || c == '\r' || c == EOF)) x.push_back(c), c = gc(); return 1;
| ^~~~~~
savrsen.cpp: In function 'bool io::write(A)':
savrsen.cpp:53:9: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
53 | if (!x) putc('0'); if (x < 0) putc ('-'), x = -x;
| ^~
savrsen.cpp:53:28: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'if'
53 | if (!x) putc('0'); if (x < 0) putc ('-'), x = -x;
| ^~
savrsen.cpp: In function 'void sieve(int)':
savrsen.cpp:73:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
73 | for(int j = 0; j < pr.size() && pr[j] <= lp[i] && 1ll*i*pr[j] <= N; ++j)
| ~~^~~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
332 KB |
Output is correct |
| 2 |
Correct |
0 ms |
332 KB |
Output is correct |
| 3 |
Correct |
4 ms |
1228 KB |
Output is correct |
| 4 |
Correct |
515 ms |
81268 KB |
Output is correct |
| 5 |
Correct |
523 ms |
81272 KB |
Output is correct |
| 6 |
Correct |
528 ms |
81224 KB |
Output is correct |
| 7 |
Correct |
495 ms |
75096 KB |
Output is correct |
| 8 |
Correct |
120 ms |
21008 KB |
Output is correct |
