제출 #856106

#제출 시각아이디문제언어결과실행 시간메모리
856106vjudge1Savrsen (COCI17_savrsen)C++17
45 / 120
638 ms78932 KiB
//author: Ahmet Alp Orakci #include <bits/stdc++.h> using namespace std; using i64 = unsigned int; const int MAXN = 1E7 + 5; i64 res[MAXN]; i64 pref[MAXN]; void precalc() { for(int i = 1; i < MAXN; i++) { for(int j = i; j < MAXN; j += i) { res[j] += i; } pref[i] = (2 * i >= res[i] ? 2 * i - res[i] : res[i] - 2 * i); } for(int i = 1; i < MAXN; i++) pref[i] += pref[i -1]; } #define ONLINE_JUDGE void solve() { int a, b; cin >> a >> b; cout << pref[b] - pref[a -1]; return; } signed main() { #ifndef ONLINE_JUDGE freopen(".in", "r", stdin); freopen(".out", "w", stdout); #endif precalc(); ios_base::sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL); int t = 1; //cin >> t; for(int i = 1; i <= t; i++) { solve(); } return 0; }

컴파일 시 표준 에러 (stderr) 메시지

savrsen.cpp: In function 'void precalc()':
savrsen.cpp:17:26: warning: comparison of integer expressions of different signedness: 'int' and 'i64' {aka 'unsigned int'} [-Wsign-compare]
   17 |         pref[i] = (2 * i >= res[i] ? 2 * i - res[i] : res[i] - 2 * i);
      |                    ~~~~~~^~~~~~~~~
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