結果
問題 | No.155 生放送とBGM |
ユーザー | LayCurse |
提出日時 | 2015-01-23 19:35:44 |
言語 | C++11 (gcc 11.4.0) |
結果 |
AC
|
実行時間 | 564 ms / 6,000 ms |
コード長 | 3,800 bytes |
コンパイル時間 | 1,514 ms |
コンパイル使用メモリ | 162,820 KB |
実行使用メモリ | 23,064 KB |
最終ジャッジ日時 | 2024-06-23 00:57:59 |
合計ジャッジ時間 | 5,751 ms |
ジャッジサーバーID (参考情報) |
judge5 / judge2 |
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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 | 544 ms
22,772 KB |
testcase_01 | AC | 530 ms
23,064 KB |
testcase_02 | AC | 516 ms
22,736 KB |
testcase_03 | AC | 469 ms
22,892 KB |
testcase_04 | AC | 17 ms
18,008 KB |
testcase_05 | AC | 2 ms
6,940 KB |
testcase_06 | AC | 564 ms
22,848 KB |
testcase_07 | AC | 3 ms
6,944 KB |
testcase_08 | AC | 2 ms
6,944 KB |
testcase_09 | AC | 4 ms
8,148 KB |
testcase_10 | AC | 2 ms
6,948 KB |
testcase_11 | AC | 4 ms
9,996 KB |
testcase_12 | AC | 4 ms
6,944 KB |
testcase_13 | AC | 2 ms
6,940 KB |
testcase_14 | AC | 409 ms
21,968 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][24000], ini[53][24000]; double solve(void){ int i, j, k, m, p, loop, block; int st, ed, sum, ini_p, ini_sum; double res = 0, pr; block = sqrt(N); rep(loop,block){ st = loop * N / block; ed = (loop + 1) * N / block; if(st==ed) continue; p = 0; sum = 0; rep(i,N+1) rep(j,L) ini[i][j] = 0; ini[0][0] = 1; rep(k,N) if(k<st || k>=ed){ p++; for(i=p-1;i>=0;i--){ pr = (double)(i+1) / (p+1); for(j=sum;j>=0;j--){ ini[i+1][j+S[k]] += ini[i][j] * pr; ini[i][j] *= 1 - pr; } } sum = min(sum+S[k], L-1); } ini_p = p; ini_sum = sum; REP(m,st,ed){ rep(i,N+1) rep(j,L) dp[i][j] = ini[i][j]; p = ini_p; sum = ini_sum; REP(k,st,ed) if(k!=m){ p++; for(i=p-1;i>=0;i--){ pr = (double)(i+1) / (p+1); for(j=sum;j>=0;j--){ dp[i+1][j+S[k]] += dp[i][j] * pr; dp[i][j] *= 1 - pr; } } sum = min(sum+S[k], L-1); } rep(i,N+1) rep(j,L) res += dp[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; }