# | Submission time | Handle | Problem | Language | Result | Execution time | Memory |
---|---|---|---|---|---|---|---|
112809 | 2019-05-22T05:07:27 Z | Kamisama | Split the sequence (APIO14_sequence) | C++14 | 6 ms | 4864 KB |
#include <iostream> #include <cstdio> #include <iomanip> #include <chrono> #define Kami #define taskname "APIO14_sequence" using namespace std; const int maxn=1e4+3; const int maxk=1e2+3; struct TLines{ long long a, b; int id; inline TLines(long long _a=0, long long _b=0, int _id=0){a=_a;b=_b;id=_id;} inline long long Value(const long long &x){return a*x+b;} friend inline bool isBad(const TLines &d1, const TLines &d2, const TLines &d3){ return (d2.b-d1.b)*(d1.a-d3.a)>=(d3.b-d1.b)*(d1.a-d2.a); } }; int n,k,a[maxn],trace[maxn][maxk]; long long s[maxn],f[maxn],g[maxn]; TLines convex[maxn]; inline void Enter(){ cin>>n>>k; for(int i=1;i<=n;i++) cin>>a[i], s[i]=s[i-1]+a[i]; } inline void Solve(){ // f[i] = max{ s[j]*s[i] + f[j] - s[j]^2 } for(int t=1;t<=k;t++){ int best=1; int nConvex=0; swap(f,g); for(int i=1;i<=n;i++){ long long x=s[i]; TLines newline(s[i],g[i]-s[i]*s[i],i); while(nConvex>1 && isBad(convex[nConvex-1],convex[nConvex],newline)){ best-=(best==nConvex); nConvex--; } convex[++nConvex]=newline; while(best<nConvex && convex[best].Value(x)<=convex[best+1].Value(x)) best++; f[i]=convex[best].Value(x); trace[i][t]=convex[best].id; } } cout<<f[n]<<'\n'; int nG=0; for(int x=n,i=k;i>=1;i--) cout<<(x=trace[x][i])<<' '; } int main(){ ios_base::sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL); if(fopen(taskname".INP","r")) freopen(taskname".INP","r",stdin), freopen(taskname".OUT","w",stdout); #ifdef Kami auto start=chrono::steady_clock::now(); #endif Enter(); Solve(); #ifdef Kami auto end=chrono::steady_clock::now(); cerr<<"\nIn milliseconds : " <<chrono::duration_cast<chrono::milliseconds>(end-start).count(); cerr<<'\n'<<"In seconds : "<<fixed<<setprecision(3) <<(double)chrono::duration_cast<chrono::milliseconds>(end-start).count()/1000<<'\n'; #endif return 0; }
Compilation message
# | Verdict | Execution time | Memory | Grader output |
---|---|---|---|---|
1 | Incorrect | 2 ms | 768 KB | Extra information in the output file |
2 | Halted | 0 ms | 0 KB | - |
# | Verdict | Execution time | Memory | Grader output |
---|---|---|---|---|
1 | Incorrect | 2 ms | 768 KB | Extra information in the output file |
2 | Halted | 0 ms | 0 KB | - |
# | Verdict | Execution time | Memory | Grader output |
---|---|---|---|---|
1 | Incorrect | 2 ms | 896 KB | Extra information in the output file |
2 | Halted | 0 ms | 0 KB | - |
# | Verdict | Execution time | Memory | Grader output |
---|---|---|---|---|
1 | Incorrect | 2 ms | 1152 KB | Extra information in the output file |
2 | Halted | 0 ms | 0 KB | - |
# | Verdict | Execution time | Memory | Grader output |
---|---|---|---|---|
1 | Incorrect | 6 ms | 4864 KB | Extra information in the output file |
2 | Halted | 0 ms | 0 KB | - |
# | Verdict | Execution time | Memory | Grader output |
---|---|---|---|---|
1 | Incorrect | 3 ms | 896 KB | Integer 0 violates the range [1, 99999] |
2 | Halted | 0 ms | 0 KB | - |