一個(gè)旅行家想駕駛汽車從城市A到城市B(設(shè)出發(fā)時(shí)油箱是空的)。給定兩個(gè)城市之間的距離dis、汽車油箱的容量c、每升汽油能行駛的距離d、沿途油站數(shù)n、油站i離出發(fā)點(diǎn)的距離d[i]以及該站每升汽油的價(jià)格p[i],i=1,2,…,n。設(shè)d[1]=0<d[2]<…<d[n]。要花最少的油費(fèi)從城市A到城市B,在每個(gè)加油站應(yīng)加多少油,最少花費(fèi)為多少?
上傳時(shí)間: 2013-12-31
上傳用戶:redmoons
已知:Sn= 1+1/2+1/3+…+1/n。顯然對(duì)于任意一個(gè)整數(shù)K,當(dāng)n足夠大的時(shí)候,Sn大于K。 現(xiàn)給出一個(gè)整數(shù)K(1<=k<=15),要求計(jì)算出一個(gè)最小的n;使得Sn>K。 Input 鍵盤輸入 k Output 屏幕輸出 n Sample Input 1 Sample Output 2 Source
上傳時(shí)間: 2014-01-25
上傳用戶:ruixue198909
Floyd-Warshall算法描述 1)適用范圍: a)APSP(All Pairs Shortest Paths) b)稠密圖效果最佳 c)邊權(quán)可正可負(fù) 2)算法描述: a)初始化:dis[u,v]=w[u,v] b)For k:=1 to n For i:=1 to n For j:=1 to n If dis[i,j]>dis[i,k]+dis[k,j] Then Dis[I,j]:=dis[I,k]+dis[k,j] c)算法結(jié)束:dis即為所有點(diǎn)對(duì)的最短路徑矩陣 3)算法小結(jié):此算法簡(jiǎn)單有效,由于三重循環(huán)結(jié)構(gòu)緊湊,對(duì)于稠密圖,效率要高于執(zhí)行|V|次Dijkstra算法。時(shí)間復(fù)雜度O(n^3)。 考慮下列變形:如(I,j)∈E則dis[I,j]初始為1,else初始為0,這樣的Floyd算法最后的最短路徑矩陣即成為一個(gè)判斷I,j是否有通路的矩陣。更簡(jiǎn)單的,我們可以把dis設(shè)成boolean類型,則每次可以用“dis[I,j]:=dis[I,j]or(dis[I,k]and dis[k,j])”來(lái)代替算法描述中的藍(lán)色部分,可以更直觀地得到I,j的連通情況。
標(biāo)簽: Floyd-Warshall Shortest Pairs Paths
上傳時(shí)間: 2013-12-01
上傳用戶:dyctj
K-MEANS算法 輸入:聚類個(gè)數(shù)k,以及包含 n個(gè)數(shù)據(jù)對(duì)象的數(shù)據(jù)庫(kù)。 輸出:滿足方差最小標(biāo)準(zhǔn)的k個(gè)聚類。 處理流程: (1) 從 n個(gè)數(shù)據(jù)對(duì)象任意選擇 k 個(gè)對(duì)象作為初始聚類中心; (2) 循環(huán)(3)到(4)直到每個(gè)聚類不再發(fā)生變化為止 (3) 根據(jù)每個(gè)聚類對(duì)象的均值(中心對(duì)象),計(jì)算每個(gè)對(duì)象與這些中心對(duì)象的距離;并根據(jù)最小距離重新對(duì)相應(yīng)對(duì)象進(jìn)行劃分; (4) 重新計(jì)算每個(gè)(有變化)聚類的均值(中心對(duì)象)
上傳時(shí)間: 2013-12-20
上傳用戶:chenjjer
題目:加密軟件 要求:(1)輸入任意一段明文M,以及密鑰K (2)根據(jù)一下公式將其轉(zhuǎn)換為密文C。 Ci = mi + K ,其中i = 0,1,……n-1 , K 為密鑰; (3)具有輸入輸出界面。
上傳時(shí)間: 2013-11-25
上傳用戶:shawvi
介紹回歸問(wèn)題中高斯過(guò)程的應(yīng)用,C. E. Rasmussen & C. K. I. Williams, Gaussian Processes for Machine Learning,
上傳時(shí)間: 2017-07-25
上傳用戶:skfreeman
k個(gè)位子,n個(gè)元素填充,每個(gè)位置上數(shù)字可重復(fù)。例程為一簡(jiǎn)潔的遞歸算法,顯示所有可能的組合
標(biāo)簽:
上傳時(shí)間: 2017-09-01
上傳用戶:181992417
實(shí)驗(yàn)源代碼 //Warshall.cpp #include<stdio.h> void warshall(int k,int n) { int i , j, t; int temp[20][20]; for(int a=0;a<k;a++) { printf("請(qǐng)輸入矩陣第%d 行元素:",a); for(int b=0;b<n;b++) { scanf ("%d",&temp[a][b]); } } for(i=0;i<k;i++){ for( j=0;j<k;j++){ if(temp[ j][i]==1) { for(t=0;t<n;t++) { temp[ j][t]=temp[i][t]||temp[ j][t]; } } } } printf("可傳遞閉包關(guān)系矩陣是:\n"); for(i=0;i<k;i++) { for( j=0;j<n;j++) { printf("%d", temp[i][ j]); } printf("\n"); } } void main() { printf("利用 Warshall 算法求二元關(guān)系的可傳遞閉包\n"); void warshall(int,int); int k , n; printf("請(qǐng)輸入矩陣的行數(shù) i: "); scanf("%d",&k); 四川大學(xué)實(shí)驗(yàn)報(bào)告 printf("請(qǐng)輸入矩陣的列數(shù) j: "); scanf("%d",&n); warshall(k,n); }
標(biāo)簽: warshall 離散 實(shí)驗(yàn)
上傳時(shí)間: 2016-06-27
上傳用戶:梁雪文以
批處理感知器算法的代碼matlab w1=[1,0.1,1.1;1,6.8,7.1;1,-3.5,-4.1;1,2.0,2.7;1,4.1,2.8;1,3.1,5.0;1,-0.8,-1.3; 1,0.9,1.2;1,5.0,6.4;1,3.9,4.0]; w2=[1,7.1,4.2;1,-1.4,-4.3;1,4.5,0.0;1,6.3,1.6;1,4.2,1.9;1,1.4,-3.2;1,2.4,-4.0; 1,2.5,-6.1;1,8.4,3.7;1,4.1,-2.2]; w3=[1,-3.0,-2.9;1,0.5,8.7;1,2.9,2.1;1,-0.1,5.2;1,-4.0,2.2;1,-1.3,3.7;1,-3.4,6.2; 1,-4.1,3.4;1,-5.1,1.6;1,1.9,5.1]; figure; plot(w3(:,2),w3(:,3),'ro'); hold on; plot(w2(:,2),w2(:,3),'b+'); W=[w2;-w3];%增廣樣本規(guī)范化 a=[0,0,0]; k=0;%記錄步數(shù) n=1; y=zeros(size(W,2),1);%記錄錯(cuò)分的樣本 while any(y<=0) k=k+1; y=a*transpose(W);%記錄錯(cuò)分的樣本 a=a+sum(W(find(y<=0),:));%更新a if k >= 250 break end end if k<250 disp(['a為:',num2str(a)]) disp(['k為:',num2str(k)]) else disp(['在250步以內(nèi)沒有收斂,終止']) end %判決面:x2=-a2*x1/a3-a1/a3 xmin=min(min(w1(:,2)),min(w2(:,2))); xmax=max(max(w1(:,2)),max(w2(:,2))); x=xmin-1:xmax+1;%(xmax-xmin): y=-a(2)*x/a(3)-a(1)/a(3); plot(x,y)
上傳時(shí)間: 2016-11-07
上傳用戶:a1241314660
#include <malloc.h> #include <stdio.h> #include <stdlib.h> #include <string.h> #define NULL 0 #define MaxSize 30 typedef struct athletestruct /*運(yùn)動(dòng)員*/ { char name[20]; int score; /*分?jǐn)?shù)*/ int range; /**/ int item; /*項(xiàng)目*/ }ATH; typedef struct schoolstruct /*學(xué)校*/ { int count; /*編號(hào)*/ int serial; /**/ int menscore; /*男選手分?jǐn)?shù)*/ int womenscore; /*女選手分?jǐn)?shù)*/ int totalscore; /*總分*/ ATH athlete[MaxSize]; /**/ struct schoolstruct *next; }SCH; int nsc,msp,wsp; int ntsp; int i,j; int overgame; int serial,range; int n; SCH *head,*pfirst,*psecond; int *phead=NULL,*pafirst=NULL,*pasecond=NULL; void create(); void input () { char answer; head = (SCH *)malloc(sizeof(SCH)); /**/ head->next = NULL; pfirst = head; answer = 'y'; while ( answer == 'y' ) { Is_Game_DoMain: printf("\nGET Top 5 when odd\nGET Top 3 when even"); printf("\n輸入運(yùn)動(dòng)項(xiàng)目序號(hào) (x<=%d):",ntsp); scanf("%d",pafirst); overgame = *pafirst; if ( pafirst != phead ) { for ( pasecond = phead ; pasecond < pafirst ; pasecond ++ ) { if ( overgame == *pasecond ) { printf("\n這個(gè)項(xiàng)目已經(jīng)存在請(qǐng)選擇其他的數(shù)字\n"); goto Is_Game_DoMain; } } } pafirst = pafirst + 1; if ( overgame > ntsp ) { printf("\n項(xiàng)目不存在"); printf("\n請(qǐng)重新輸入"); goto Is_Game_DoMain; } switch ( overgame%2 ) { case 0: n = 3;break; case 1: n = 5;break; } for ( i = 1 ; i <= n ; i++ ) { Is_Serial_DoMain: printf("\n輸入序號(hào) of the NO.%d (0<x<=%d): ",i,nsc); scanf("%d",&serial); if ( serial > nsc ) { printf("\n超過(guò)學(xué)校數(shù)目,請(qǐng)重新輸入"); goto Is_Serial_DoMain; } if ( head->next == NULL ) { create(); } psecond = head->next ; while ( psecond != NULL ) { if ( psecond->serial == serial ) { pfirst = psecond; pfirst->count = pfirst->count + 1; goto Store_Data; } else { psecond = psecond->next; } } create(); Store_Data: pfirst->athlete[pfirst->count].item = overgame; pfirst->athlete[pfirst->count].range = i; pfirst->serial = serial; printf("Input name:) : "); scanf("%s",pfirst->athlete[pfirst->count].name); } printf("\n繼續(xù)輸入運(yùn)動(dòng)項(xiàng)目(y&n)?"); answer = getchar(); printf("\n"); } } void calculate() /**/ { pfirst = head->next; while ( pfirst->next != NULL ) { for (i=1;i<=pfirst->count;i++) { if ( pfirst->athlete[i].item % 2 == 0 ) { switch (pfirst->athlete[i].range) { case 1:pfirst->athlete[i].score = 5;break; case 2:pfirst->athlete[i].score = 3;break; case 3:pfirst->athlete[i].score = 2;break; } } else { switch (pfirst->athlete[i].range) { case 1:pfirst->athlete[i].score = 7;break; case 2:pfirst->athlete[i].score = 5;break; case 3:pfirst->athlete[i].score = 3;break; case 4:pfirst->athlete[i].score = 2;break; case 5:pfirst->athlete[i].score = 1;break; } } if ( pfirst->athlete[i].item <=msp ) { pfirst->menscore = pfirst->menscore + pfirst->athlete[i].score; } else { pfirst->womenscore = pfirst->womenscore + pfirst->athlete[i].score; } } pfirst->totalscore = pfirst->menscore + pfirst->womenscore; pfirst = pfirst->next; } } void output() { pfirst = head->next; psecond = head->next; while ( pfirst->next != NULL ) { // clrscr(); printf("\n第%d號(hào)學(xué)校的結(jié)果成績(jī):",pfirst->serial); printf("\n\n項(xiàng)目的數(shù)目\t學(xué)校的名字\t分?jǐn)?shù)"); for (i=1;i<=ntsp;i++) { for (j=1;j<=pfirst->count;j++) { if ( pfirst->athlete[j].item == i ) { printf("\n %d\t\t\t\t\t\t%s\n %d",i,pfirst->athlete[j].name,pfirst->athlete[j].score);break; } } } printf("\n\n\n\t\t\t\t\t\t按任意建 進(jìn)入下一頁(yè)"); getchar(); pfirst = pfirst->next; } // clrscr(); printf("\n運(yùn)動(dòng)會(huì)結(jié)果:\n\n學(xué)校編號(hào)\t男運(yùn)動(dòng)員成績(jī)\t女運(yùn)動(dòng)員成績(jī)\t總分"); pfirst = head->next; while ( pfirst->next != NULL ) { printf("\n %d\t\t %d\t\t %d\t\t %d",pfirst->serial,pfirst->menscore,pfirst->womenscore,pfirst->totalscore); pfirst = pfirst->next; } printf("\n\n\n\t\t\t\t\t\t\t按任意建結(jié)束"); getchar(); } void create() { pfirst = (struct schoolstruct *)malloc(sizeof(struct schoolstruct)); pfirst->next = head->next ; head->next = pfirst ; pfirst->count = 1; pfirst->menscore = 0; pfirst->womenscore = 0; pfirst->totalscore = 0; } void Save() {FILE *fp; if((fp = fopen("school.dat","wb"))==NULL) {printf("can't open school.dat\n"); fclose(fp); return; } fwrite(pfirst,sizeof(SCH),10,fp); fclose(fp); printf("文件已經(jīng)成功保存\n"); } void main() { system("cls"); printf("\n\t\t\t 運(yùn)動(dòng)會(huì)分?jǐn)?shù)統(tǒng)計(jì)\n"); printf("輸入學(xué)校數(shù)目 (x>= 5):"); scanf("%d",&nsc); printf("輸入男選手的項(xiàng)目(x<=20):"); scanf("%d",&msp); printf("輸入女選手項(xiàng)目(<=20):"); scanf("%d",&wsp); ntsp = msp + wsp; phead = (int *)calloc(ntsp,sizeof(int)); pafirst = phead; pasecond = phead; input(); calculate(); output(); Save(); }
標(biāo)簽: 源代碼
上傳時(shí)間: 2016-12-28
上傳用戶:150501
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