#include <stdio.h>
#include <queue>
#include <vector>
#include <functional>
#include <algorithm>
#define next(x) (x==n?1:x+1)
#define before(x) (x==1?n:x-1)
using namespace std;
typedef pair<int, pair<int, int> > pip;
int n, m, in[1000001];
priority_queue<pip, vector<pip>, greater<pip> > Q;
int main() {
int s, num = -1;
int path, x, y, len, tot = 0, tx;
bool check;
scanf("%d %d", &n, &m);
for (int i = 1; i <= n; i++) {
scanf("%d", &in[i]);
if (num < in[i]) num = in[i], s = i;
}
path = s, len = 0, check = false;;
for (int i = next(s); i != s; i = next(i)) {
if (in[path] > in[i]) x = i, len = 1, check = true;
if (in[path] == in[i]) len++;
if (in[path] < in[i] && check) Q.push({ len,{x, path} }), check = false;
path = i;
}
if (in[path] < in[s] && check) Q.push({ len,{x, path} });
while ((!Q.empty()) && Q.top().first <= m) {
len = Q.top().first, x = Q.top().second.first, y = Q.top().second.second;
Q.pop(), m -= len ,tot++;
tx = x;
for (int i = 1; i <= len; i++) in[tx]++, tx = next(tx);
tx = x, num = 0;
while (in[before(tx)] == in[tx]) {
num++, tx = before(tx), len++;
if (num > n) break;
}
if (in[before(tx)] == in[tx]) break;
if (in[before(tx)] < in[tx]) continue;
while (in[y] == in[next(y)]) len++, y = next(y);
if (in[y] < in[next(y)]) Q.push({ len,{tx,y} });
}
printf("%d", tot * 2);
//getchar(), getchar();
}
Compilation message
route.cpp: In function 'int main()':
route.cpp:19:24: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%d %d", &n, &m);
^
route.cpp:21:22: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%d", &in[i]);
^
route.cpp:32:21: warning: 's' may be used uninitialized in this function [-Wmaybe-uninitialized]
if (in[path] < in[s] && check) Q.push({ len,{x, path} });
^
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
0 ms |
5076 KB |
Output is correct |
2 |
Correct |
0 ms |
5076 KB |
Output is correct |
3 |
Correct |
0 ms |
5076 KB |
Output is correct |
4 |
Correct |
0 ms |
5076 KB |
Output is correct |
5 |
Correct |
0 ms |
5076 KB |
Output is correct |
6 |
Correct |
0 ms |
5076 KB |
Output is correct |
7 |
Correct |
36 ms |
5076 KB |
Output is correct |
8 |
Correct |
66 ms |
5076 KB |
Output is correct |
9 |
Correct |
363 ms |
5076 KB |
Output is correct |
10 |
Correct |
223 ms |
5076 KB |
Output is correct |
11 |
Execution timed out |
2000 ms |
6312 KB |
Execution timed out |
12 |
Halted |
0 ms |
0 KB |
- |