Submission #200201

#	Time	Username	Problem	Language	Result	Execution time	Memory
200201		wilwxk	Safety (NOI18_safety)	C++14	0 / 100	2096 ms	504 KiB

safety

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;

const int MAXN = 20;
int v[MAXN], aux[MAXN], vv[MAXN];
ll ans = 1e18;
int n, x;

void brute(int id) {
	if(id == n) {
		for(int i = 1; i <= n; i++) {
			vv[i] = v[i];
			for(int j = i-1; j >= 1; j--) vv[j] = vv[j+1]+aux[j];
			for(int j = i+1; j <= n; j++) vv[j] = vv[j-1]+aux[j];

			ll val = 0;
			for(int i = 1; i <= n; i++) val += abs(vv[i]-v[i]);
			ans = min(ans, val);
		}
		return;
	}
	for(int k = -x; k <= x; k++) {
		aux[id] = k;
		brute(id+1);
	}
}

int main() {
	scanf("%d %d", &n, &x);
	for(int i = 1; i <= n; i++) scanf("%d", &v[i]);

	brute(1);

	printf("%lld\n", ans);
}

Compilation message (stderr)

safety.cpp: In function 'int main()':
safety.cpp:30:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d %d", &n, &x);
  ~~~~~^~~~~~~~~~~~~~~~~
safety.cpp:31:35: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  for(int i = 1; i <= n; i++) scanf("%d", &v[i]);
                              ~~~~~^~~~~~~~~~~~~

• Subtask 1: 0 / 3
• Subtask 2: 0 / 4
• Subtask 3: 0 / 9
• Subtask 4: 0 / 5
• Subtask 5: 0 / 6
• Subtask 6: 0 / 11
• Subtask 7: 0 / 11
• Subtask 8: 0 / 22
• Subtask 9: 0 / 29