Submission #1090211

#TimeUsernameProblemLanguageResultExecution timeMemory
1090211hahahahaLet's Win the Election (JOI22_ho_t3)C++17
10 / 100
101 ms2424 KiB
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#define i64 long long #define ld long double #define bit(n,i) ((n>>i)&1) #define pii pair<int,int> #define sz(x) (int)x.size() #define FOR(i,a,b) for(int i=a; i<=b; i++) #define FOD(i,a,b) for(int i=a; i>=b; i--) #define fi first #define se second #define pb push_back #define all(x) x.begin(),x.end() #define __sumairu__ signed main() #define die_hard_onimai_fan void seggs() #define file(name) if(fopen(name".inp","r")){freopen(name".inp","r",stdin);freopen(name".out","w",stdout);} #define brute(name) if(fopen(name".inp","r")){freopen(name".inp","r",stdin);freopen(name".ans","w",stdout);} #define TIME (1.0*clock()/CLOCKS_PER_SEC) #define FAST ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0); #define ai(n) array<int,n> #define dbg(x) {cerr<<#x<<' '<<x<<endl;} #define dbgArr(arr,n) {cerr<<#arr;FOR(_i,1,n)cerr<<' '<<(arr)[_i];cerr<<endl;} template <typename T,typename U> ostream& operator<<(ostream &os,pair<T,U>p){ return os<<"{"<<p.fi<<", "<<p.se<<"}"; } mt19937_64 rd(chrono::steady_clock::now().time_since_epoch().count()); i64 Rand(i64 l,i64 r) { i64 ans=l+1ll*rd()*rd()%(r-l+1); assert(l<=ans&&ans<=r); return ans; } //const i64 base=1e9+7; //const i64 mod=(1ll<<53)+5; #define i64 long long #define debug 0 const int mod=1e9+7; //const int mod=998244353; const int inf=1e9; ///check the limits, dummy const int N=502; int n,K; pii a[N]; float dp[2][N][N]; die_hard_onimai_fan { cin>>n>>K; FOR(i,1,n) { cin>>a[i].fi>>a[i].se; if(a[i].se==-1)a[i].se=inf; } sort(a+1,a+n+1,[&](auto x,auto y){ if(x.se!=y.se)return x.se<y.se; return x.fi<y.fi; }); FOR(i,0,1)FOR(j,0,n)FOR(k,0,n)dp[i][j][k]=inf; /// pos,taken,mult dp[0][0][1]=0; FOR(i,1,n) { FOR(j,0,i)FOR(k,0,i+1)dp[i&1][j][k]=inf; FOR(j,0,i-1)FOR(k,1,i)if(dp[(i-1)&1][j][k]!=inf) { /// dont take { dp[i&1][j][k]=min(dp[i&1][j][k],dp[(i-1)&1][j][k]); } /// take,not mult { dp[i&1][j+1][k]=min(dp[i&1][j+1][k],dp[(i-1)&1][j][k]+(float)a[i].fi/k); } /// take,mult if(a[i].se!=inf) { dp[i&1][j+1][k+1]=min(dp[i&1][j+1][k+1],dp[(i-1)&1][j][k]+(float)a[i].se/k); } } } float ans=inf; FOR(i,1,n+1)ans=min(ans,dp[n&1][K][i]); cout<<setprecision(2)<<fixed<<ans; } __sumairu__ { FAST file(""); int tt=1;//cin>>tt; while(tt--)seggs(); cerr<<"\nTime elapsed: "<<TIME<<" s.\n"; } /** 3 3 2 3 1 5 4 5 */

Compilation message (stderr)

Main.cpp: In function 'int main()':
Main.cpp:61:53: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   61 | #define file(name) if(fopen(name".inp","r")){freopen(name".inp","r",stdin);freopen(name".out","w",stdout);}
      |                                              ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
Main.cpp:145:5: note: in expansion of macro 'file'
  145 |     file("");
      |     ^~~~
Main.cpp:61:83: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   61 | #define file(name) if(fopen(name".inp","r")){freopen(name".inp","r",stdin);freopen(name".out","w",stdout);}
      |                                                                            ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~
Main.cpp:145:5: note: in expansion of macro 'file'
  145 |     file("");
      |     ^~~~
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