Submission #1001167
Source Code Expand
#include <iostream> #include <iomanip> #include <cstdio> #include <cstdlib> #include <algorithm> #include <numeric> #include <random> #include <vector> #include <array> #include <bitset> #include <queue> #include <set> #include <unordered_set> #include <map> #include <unordered_map> using namespace std; using ll = long long; using ull = unsigned long long; constexpr ll TEN(int n) { return (n==0) ? 1 : 10*TEN(n-1); } int bsr(int x) { return 31 - __builtin_clz(x); } const int MN = 5050; using P = pair<ll, ll>; int X; vector<P> v; ll dp[MN][MN]; bool used[MN][MN]; ll calc(int m, int a) { if (m == 0) return 0; int b = m-a; if (used[m][a]) return dp[m][a]; used[m][a] = true; ll &ans = dp[m][a]; ans = TEN(18); P p = v[m-1]; // left if (a) { ll x = p.first*(a-1); x += p.second*(a); ans = min(ans, x + calc(m-1, a-1)); } // right if (b) { ll x = p.first*(b); x += p.second*(b-1); ans = min(ans, x + calc(m-1, a)); } return ans; } int main() { ios::sync_with_stdio(0); cout << setprecision(20); int n; cin >> n; for (int i = 0; i < n; i++) { ll l, r; cin >> l >> r; v.push_back(P(l, r)); } sort(v.begin(), v.end(), [&](const P l, const P r){ return (l.first+l.second) > (r.first+r.second); }); if (n % 2 == 0) { X = n; cout << calc(n, n/2) << endl; return 0; } ll L = v.back().first+v.back().second; X = 0; for (int i = n-1; i >= 0; i--) { if (v[i].first+v[i].second > L) { X = i+1; break; } } int U = n-X; sort(v.begin()+X, v.end(), [&](const P l, const P r){ return l.second < r.second; }); vector<ll> fsm(U+1), ssm(U+1), osm(U+1); fsm[0] = ssm[0] = 0; osm[0] = 0; for (int i = 0; i < U; i++) { fsm[i+1] = fsm[i]+v[X+i].first; ssm[i+1] = ssm[i]+v[X+i].second; osm[i+1] = osm[i]+i; } ll ans = TEN(18); int m = (n-1)/2; for (int i = 0; i < U; i++) { int j = U-i-1; if (m-i < 0 || m-j < 0) continue; ll base = calc(X, m-i); base += ssm[i]; base += fsm[U]-fsm[U-j]; base += L * m; base += L * min(TEN(18)/L, (ll(i+j)*m - (osm[i+1]+osm[j+1]))); // cout << i << " " << base << endl; ans = min(ans, base); } cout << ans << endl; return 0; }
Submission Info
Submission Time | |
---|---|
Task | F - Intervals |
User | yosupo |
Language | C++14 (GCC 5.4.1) |
Score | 0 |
Code Size | 2574 Byte |
Status | WA |
Exec Time | 438 ms |
Memory | 93568 KB |
Judge Result
Set Name | Sample | All | ||||||
---|---|---|---|---|---|---|---|---|
Score / Max Score | 0 / 0 | 0 / 1000 | ||||||
Status |
|
|
Set Name | Test Cases |
---|---|
Sample | example0.txt, example1.txt |
All | 000.txt, 001.txt, 002.txt, 003.txt, 004.txt, 005.txt, 006.txt, 007.txt, 008.txt, 009.txt, 010.txt, 011.txt, 012.txt, 013.txt, 014.txt, 015.txt, 016.txt, 017.txt, 018.txt, 019.txt, 020.txt, 021.txt, 022.txt, 023.txt, 024.txt, 025.txt, 026.txt, 027.txt, 028.txt, 029.txt, 030.txt, 031.txt, 032.txt, 033.txt, 034.txt, 035.txt, 036.txt, 037.txt, 038.txt, 039.txt, 040.txt, 041.txt, 042.txt, example0.txt, example1.txt |
Case Name | Status | Exec Time | Memory |
---|---|---|---|
000.txt | AC | 430 ms | 93568 KB |
001.txt | AC | 85 ms | 27136 KB |
002.txt | AC | 431 ms | 93568 KB |
003.txt | WA | 327 ms | 75264 KB |
004.txt | AC | 430 ms | 93568 KB |
005.txt | AC | 167 ms | 44800 KB |
006.txt | AC | 427 ms | 93568 KB |
007.txt | AC | 213 ms | 54144 KB |
008.txt | AC | 438 ms | 93568 KB |
009.txt | AC | 47 ms | 17024 KB |
010.txt | AC | 430 ms | 93568 KB |
011.txt | AC | 184 ms | 48512 KB |
012.txt | AC | 437 ms | 93568 KB |
013.txt | AC | 39 ms | 14976 KB |
014.txt | AC | 431 ms | 93568 KB |
015.txt | AC | 87 ms | 27264 KB |
016.txt | AC | 434 ms | 93568 KB |
017.txt | AC | 315 ms | 74240 KB |
018.txt | AC | 427 ms | 93568 KB |
019.txt | AC | 204 ms | 52096 KB |
020.txt | AC | 3 ms | 256 KB |
021.txt | AC | 3 ms | 256 KB |
022.txt | AC | 428 ms | 93568 KB |
023.txt | AC | 427 ms | 93568 KB |
024.txt | AC | 431 ms | 93568 KB |
025.txt | AC | 428 ms | 93568 KB |
026.txt | AC | 436 ms | 93568 KB |
027.txt | AC | 436 ms | 93568 KB |
028.txt | AC | 433 ms | 93568 KB |
029.txt | AC | 426 ms | 93568 KB |
030.txt | AC | 433 ms | 93568 KB |
031.txt | AC | 437 ms | 93568 KB |
032.txt | AC | 431 ms | 93568 KB |
033.txt | AC | 432 ms | 93568 KB |
034.txt | AC | 429 ms | 93568 KB |
035.txt | AC | 429 ms | 93568 KB |
036.txt | AC | 429 ms | 93568 KB |
037.txt | AC | 428 ms | 93568 KB |
038.txt | AC | 430 ms | 93568 KB |
039.txt | AC | 424 ms | 93568 KB |
040.txt | AC | 427 ms | 93568 KB |
041.txt | AC | 434 ms | 93568 KB |
042.txt | AC | 431 ms | 93568 KB |
example0.txt | AC | 3 ms | 256 KB |
example1.txt | AC | 3 ms | 384 KB |