Submission #861485

#	Time	Username	Problem	Language	Result	Execution time	Memory
861485		maks007	Homecoming (BOI18_homecoming)	C++14	0 / 100	32 ms	18380 KiB

homecoming

#include "bits/stdc++.h"
#include "homecoming.h"

using namespace std;

#define intl long long

intl solve(int n, int k, int *A, int *B) {
	vector <intl> a, b, pref(n, 0);
	function <intl(intl)> get=[&](intl idx) {
		if(idx + k - 1 < n) return (pref[idx+k-1]-(idx?pref[idx-1]:0LL))*1LL;
		else {
			intl ans = (pref[n-1]-(idx?pref[idx-1]:0LL)) * 1LL;
			ans += (pref[(idx+k-1)%n])*1LL;
			return ans;
		}
	};
	for(intl i = 0; i < n; i ++) a.push_back(A[i]);
	for(intl i = 0; i < n; i ++) b.push_back(B[i]);
	intl ans = 0;
	/*for(int i = 0; i < n; i ++) {
		if(i) pref[i] = pref[i-1];
		pref[i] += (b[i] * 1LL);
	}*/
	// for(auto i : pref) cout << i << " ";
	// cout << "\n";
	for(intl i = 0; i < n; i ++) {
		intl bank = a[i], kk = k;
		for(intl j = i; kk >= 1; j ++, kk --) {
			j %= n;
			bank -= b[j];
		}	
		if(bank < 0) continue;
		ans += bank;
	}
	assert(ans >= 0);
	return ans;
} 

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