Submission #721992

#	Time	Username	Problem	Language	Result	Execution time	Memory
721992		TimDee	Homecoming (BOI18_homecoming)	C++17	0 / 100	47 ms	37328 KiB

homecoming

//   you're already the best
//             _
//   ^ ^      //
// >(O_O)<___//
//   \ __ __  \
//    \\ \\ \\\\

#include "homecoming.h"
#include <bits/stdc++.h>
using namespace std;
 
#pragma GCC optimize("O3","unroll-loops")
#pragma GCC target("avx2,bmi,bmi2,lzcnt,popcnt")

using ll = long long;
//#define int long long
//#define double long double
#define forn(i,n) for(int i=0; i<(n); ++i)
#define pb push_back
#define pi pair<int,int>
#define f first
#define s second 
#define vii(a,n) vector<int> a(n); forn(i,n) cin>>a[i];
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(), x.rend()

mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
const int inf = 1e18;
const int mod = 998244353;

long long solve(int N, int K, int *A, int *B) {
    #define int long long
    vector<pi> dp(N+1,{-inf,0});
    vector<int> b;
    forn(i,N) b.pb(B[i]);
    forn(i,N) b.pb(B[i]);
    vector<int> pr(2*N+1,0);
    forn(i,2*N) pr[i+1]=pr[i]+b[i];
    forn(i,N) {
        dp[i+1].f = max(dp[i].f+b[i+K-1],dp[i].s+pr[i+K]-pr[i]);
        dp[i+1].s = max(dp[i].f,dp[i].s);
    }
    return max(dp[N].f,dp[N].s);
    #undef int
}

Compilation message (stderr)

homecoming.cpp:5:1: warning: multi-line comment [-Wcomment]
    5 | //   \ __ __  \
      | ^
homecoming.cpp:28:17: warning: overflow in conversion from 'double' to 'int' changes value from '1.0e+18' to '2147483647' [-Woverflow]
   28 | const int inf = 1e18;
      |                 ^~~~

• Subtask 1: 0 / 13
• Subtask 2: 0 / 18
• Subtask 3: 0 / 31
• Subtask 4: 0 / 38