結果
問題 | No.155 生放送とBGM |
ユーザー | LayCurse |
提出日時 | 2015-01-23 19:50:04 |
言語 | C++11 (gcc 11.4.0) |
結果 |
WA
|
実行時間 | - |
コード長 | 3,369 bytes |
コンパイル時間 | 1,462 ms |
コンパイル使用メモリ | 162,440 KB |
実行使用メモリ | 28,216 KB |
最終ジャッジ日時 | 2024-06-23 00:58:03 |
合計ジャッジ時間 | 3,020 ms |
ジャッジサーバーID (参考情報) |
judge2 / judge4 |
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テストケース
テストケース表示入力 | 結果 | 実行時間 実行使用メモリ |
---|---|---|
testcase_00 | AC | 174 ms
27,640 KB |
testcase_01 | AC | 182 ms
27,556 KB |
testcase_02 | WA | - |
testcase_03 | WA | - |
testcase_04 | AC | 13 ms
18,368 KB |
testcase_05 | AC | 2 ms
6,944 KB |
testcase_06 | AC | 174 ms
27,712 KB |
testcase_07 | AC | 3 ms
6,944 KB |
testcase_08 | AC | 2 ms
6,940 KB |
testcase_09 | AC | 3 ms
8,528 KB |
testcase_10 | AC | 2 ms
6,944 KB |
testcase_11 | AC | 4 ms
10,172 KB |
testcase_12 | AC | 5 ms
8,656 KB |
testcase_13 | AC | 2 ms
9,932 KB |
testcase_14 | AC | 136 ms
27,292 KB |
コンパイルメッセージ
main.cpp: In function ‘void reader(double*)’: main.cpp:15:29: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result] 15 | void reader(double *x){scanf("%lf",x);} | ~~~~~^~~~~~~~~
ソースコード
#include<bits/stdc++.h> using namespace std; #define REP(i,a,b) for(i=a;i<b;i++) #define rep(i,n) REP(i,0,n) #define mygc(c) (c)=getchar_unlocked() #define mypc(c) putchar_unlocked(c) #define ll long long #define ull unsigned ll void reader(int *x){int k,m=0;*x=0;for(;;){mygc(k);if(k=='-'){m=1;break;}if('0'<=k&&k<='9'){*x=k-'0';break;}}for(;;){mygc(k);if(k<'0'||k>'9')break;*x=(*x)*10+k-'0';}if(m)(*x)=-(*x);} void reader(ll *x){int k,m=0;*x=0;for(;;){mygc(k);if(k=='-'){m=1;break;}if('0'<=k&&k<='9'){*x=k-'0';break;}}for(;;){mygc(k);if(k<'0'||k>'9')break;*x=(*x)*10+k-'0';}if(m)(*x)=-(*x);} void reader(double *x){scanf("%lf",x);} int reader(char c[]){int i,s=0;for(;;){mygc(i);if(i!=' '&&i!='\n'&&i!='\r'&&i!='\t'&&i!=EOF) break;}c[s++]=i;for(;;){mygc(i);if(i==' '||i=='\n'||i=='\r'||i=='\t'||i==EOF) break;c[s++]=i;}c[s]='\0';return s;} template <class T, class S> void reader(T *x, S *y){reader(x);reader(y);} template <class T, class S, class U> void reader(T *x, S *y, U *z){reader(x);reader(y);reader(z);} template <class T, class S, class U, class V> void reader(T *x, S *y, U *z, V *w){reader(x);reader(y);reader(z);reader(w);} void writer(int x, char c){int s=0,m=0;char f[10];if(x<0)m=1,x=-x;while(x)f[s++]=x%10,x/=10;if(!s)f[s++]=0;if(m)mypc('-');while(s--)mypc(f[s]+'0');mypc(c);} void writer(ll x, char c){int s=0,m=0;char f[20];if(x<0)m=1,x=-x;while(x)f[s++]=x%10,x/=10;if(!s)f[s++]=0;if(m)mypc('-');while(s--)mypc(f[s]+'0');mypc(c);} void writer(double x, char c){printf("%.15f",x);mypc(c);} void writer(const char c[]){int i;for(i=0;c[i]!='\0';i++)mypc(c[i]);} void writer(const char x[], char c){int i;for(i=0;x[i]!='\0';i++)mypc(x[i]);mypc(c);} template<class T> void writerLn(T x){writer(x,'\n');} template<class T, class S> void writerLn(T x, S y){writer(x,' ');writer(y,'\n');} template<class T, class S, class U> void writerLn(T x, S y, U z){writer(x,' ');writer(y,' ');writer(z,'\n');} template<class T> void writerArr(T x[], int n){int i;if(!n){mypc('\n');return;}rep(i,n-1)writer(x[i],' ');writer(x[n-1],'\n');} int N, L; int S[120]; double brute(void){ int i, j, k, ind[120], rem; double res = 0, all = 0; rep(i,N) ind[i] = i; do{ rem = L; rep(i,N){ res++; rem -= S[ind[i]]; if(rem <= 0) break; } all++; }while(next_permutation(ind,ind+N)); return res / all; } double dp[53][30000], ini[53][30000]; double solve(void){ int i, j, k, m, p, mx = 61 * 60; double res = 0, pr, inv; rep(i,N+1) rep(j,L+mx) dp[i][j] = 0; dp[0][0] = 1; p = 0; rep(k,N){ p++; for(i=p-1;i>=0;i--){ pr = (double)(i+1) / (p+1); for(j=L+mx-1;j>=0;j--){ dp[i+1][j+S[k]] += dp[i][j] * pr; dp[i][j] *= 1 - pr; } } } rep(m,N){ rep(i,N+1) rep(j,L+mx) ini[i][j] = dp[i][j]; rep(i,N){ pr = (double)(i+1) / (N+1); inv = 1.0 / (1-pr); rep(j,L){ ini[i][j] *= inv; ini[i+1][j+S[m]] -= ini[i][j] * pr; } } rep(i,N+1) rep(j,L) res += ini[i][j]; } return res; } int main(){ int i, j, k; double res; reader(&N,&L); assert(1 <= N && N <= 50); assert(1 <= L && L <= 300); L *= 60; rep(i,N){ reader(&j,&k); S[i] = j * 60 + k; assert(0 <= j && j <= 59); assert(0 <= k && k <= 59); } // res = brute(); // writerLn(res); res = solve(); writerLn(res); return 0; }