1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68
| #include<bits/stdc++.h> #define int long long #define ull unsigned long long #define maxn 1000005 #define put() putchar('\n') #define Tp template<typename T> #define Ts template<typename T,typename... Ar> using namespace std; Tp void read(T &x){ int f=1;x=0;char c=getchar(); while (c<'0'||c>'9') {if (c=='-') f=-1;c=getchar();} while (c>='0'&&c<='9') {x=x*10+c-'0';c=getchar();} x*=f; } namespace Debug{ Tp void _debug(char* f,T t){cerr<<f<<'='<<t<<endl;} Ts void _debug(char* f,T x,Ar... y){while(*f!=',') cerr<<*f++;cerr<<'='<<x<<",";_debug(f+1,y...);} #define gdb(...) _debug((char*)#__VA_ARGS__,__VA_ARGS__) }using namespace Debug; #define fi first #define se second #define mk make_pair const int mod=1e9+7; int power(int x,int y=mod-2) { int sum=1; while (y) { if (y&1) sum=sum*x%mod; x=x*x%mod;y>>=1; } return sum; } int n,m,a[maxn],b[maxn],ANS,s[maxn]; int F(int x) {return x*(x+1)/2;} bool check(int val) { int i,l,r,sum=0,ans=1e18; for (i=1;i<=n;i++) a[i]=b[i]; for (i=2;i<=n;i++) if (a[i]>a[i-1]+val) sum+=a[i]-(a[i-1]+val),a[i]=a[i-1]+val; for (i=n-1;i>=1;i--) if (a[i]>a[i+1]+val) sum+=a[i]-(a[i+1]+val),a[i]=a[i+1]+val; for (i=1;i<=n;i++) s[i]=s[i-1]+a[i]; l=1;r=1;int id=0; while (r<n&&a[r+1]>(r)*val) r++; ans=min(ans,s[r]-F(r-1)*val); if (ans+sum<=m) id=1; for (i=2;i<=n;i++) { while (r<n&&a[r+1]>(r-i+1)*val) r++; while (l<=n&&a[l]<(i-l)*val) l++; int tmp=s[r]-s[l-1]-(F(r-i)+F(i-l))*val; ans=min(ans,tmp); if (tmp+sum<=m&&!id) id=i; } if (ans+sum<=m) ANS=id; return ans+sum<=m; } signed main(void){ int i; read(n);read(m); for (i=1;i<=n;i++) read(a[i]),b[i]=a[i]; int l=-1,r=1e9,mid; while (l+1<r) { mid=l+r>>1; if (check(mid)) r=mid; else l=mid; } printf("%lld %lld\n",ANS,r); return 0; }
|