Submission #405777

#	Time	Username	Problem	Language	Result	Execution time	Memory
405777		gevacrt	Gap (APIO16_gap)	C++17	87.18 / 100	64 ms	1868 KiB

gap

#include<bits/stdc++.h>
#include "gap.h"
using namespace std;

typedef long long ll;
typedef unsigned long long ull;
typedef long double ld;

typedef vector<ll> vi;
typedef pair<int, int> ii;
typedef vector<ii> vii;
typedef vector<vi> vvi;
typedef vector<vii> vvii;

#define INF INT_MAX
#define MOD 1000000007
#define all(x) x.begin(), x.end()

ll solve1(int N){
    vi A(N); ll L = 0, R = 1e18;
    for(int l = 0, r = N-1; l <= r; l++, r--){
        MinMax(L, R, &A[l], &A[r]);
        L = A[l]+1, R = A[r]-1;
        
        assert(A[l] != -1 and A[r] != -1);
    }

    ll ans = 0;
    for(int x = 0; x < N-1; x++)
        ans = max(ans, A[x+1]-A[x]);
    return ans;
}

ll solve2(int N){
    ll L, R; MinMax(0, 1e18, &L, &R);
    ll D = (R-L+N-2)/(N-1);

    for(ll K = L+1; K < R; ){
        ll mn, mx; MinMax(K, K+D-1, &mn, &mx);
        if(mx != -1){
            K = mx+1; continue;
        }

        for(ll i = 2; ; i++){
            MinMax(K, K+i*D-1, &mn, &mx);
            if(mn == -1) continue;
            D = mn-K+1; K = mn+1;
            break;
        }
    }
    return D;
}


ll findGap(int T, int N){
    if(T == 1) return solve1(N);
    return solve2(N);
}

• Subtask 1: 30 / 30
• Subtask 2: 57.1760653723 / 70