제출 #748557

#제출 시각아이디문제언어결과실행 시간메모리
748557AnhPhamAliens (IOI16_aliens)C++17
컴파일 에러
0 ms0 KiB
#include <bits/stdc++.h> using namespace std; #ifdef LOCAL #include "algo/debug.h" #else #define debug(...)42 #endif #define int long long #define SZ(_v) (int)(_v).size() #define all(_v) (_v).begin(), (_v).end() #define pb push_back #define FOR(_v, _l, _r) for (int _v = _l; _v <= _r; ++_v) #define FOD(_v, _r, _l) for (int _v = _r; _v >= _l; --_v) #define REP(_v, _r) for (int _v = 0; _v < _r; ++_v) #define RED(_v, _r) for (int _v = _r - 1; _v >= 0; --_v) const int N = (int)1e6 + 1, M = (int)1e3 + 1; const int MOD = (int)1e9 + 7; typedef pair<int, int> ii; typedef pair<int, ii> pii; #define f first #define s second void solve(); int32_t main() { ios_base::sync_with_stdio(false); cin.tie(nullptr); cout.tie(nullptr); solve(); } int n, m, k; ii a[N], dp[N]; pii l[N]; int s, e, cnt; int sq(int x) { return x * x; } bool cp(pii x, pii y, pii z) { return (x.s.f - z.s.f) * (y.s.s - x.s.s) >= (x.s.f - y.s.f) * (z.s.s - x.s.s); } int f(int x, int y) { return l[x].s.f * y + l[x].s.s; } void update(int x, int y, int z) { while (e - s > 1 && cp(l[e - 2], l[e - 1], { z, { x, y } })) --e; l[e++] = { z, { x, y } }; } ii calc(int x) { s = e = 0; update(-2 * (a[0].f - 1), sq(a[0].f - 1), 0); FOR(i, 1, cnt) { while (e - s > 1 && f(s, a[i - 1].s) >= f(s + 1, a[i - 1].s)) ++s; dp[i] = { f(s, a[i - 1].s) + sq(a[i - 1].s) + x, dp[l[s].f].s + 1 }; update(-2 * (a[i].f - 1), dp[i].f + sq(a[i].f - 1) - sq(max(0ll, a[i - 1].s - a[i].f + 1)), i); } return dp[cnt]; } int take_photos(vector<int> x, vector<int> y) { REP(i, n) a[i] = { min(x[i], y[i]), max(x[i], y[i]) }; sort(a, a + n, [&](ii x, ii y) { return x.f == y.f ? x.s > y.s : x.f < y.f; }); cnt = 1; FOR(i, 1, n - 1) if(a[i].s > a[cnt - 1].s) a[cnt++] = a[i]; int l = 0, r = sq(m); while(r - l > 1) { int mid = (l + r) / 2; k <= calc(mid).s ? l = mid : r = mid; } return calc(l).f - k * l; } void solve() { cin >> n >> m >> k; vector<int> x(n), y(n); REP(i, n) cin >> x[i] >> y[i]; cout << take_photos(x, y); }

컴파일 시 표준 에러 (stderr) 메시지

/usr/bin/ld: /tmp/cc6sTwoj.o: in function `main':
grader.cpp:(.text.startup+0x0): multiple definition of `main'; /tmp/ccZJAzPl.o:aliens.cpp:(.text.startup+0x0): first defined here
/usr/bin/ld: /tmp/cc6sTwoj.o: in function `main':
grader.cpp:(.text.startup+0xf0): undefined reference to `take_photos(int, int, int, std::vector<int, std::allocator<int> >, std::vector<int, std::allocator<int> >)'
collect2: error: ld returned 1 exit status