[鐪嬩簡瀹樻柟鐨勯瑙ｅ悗鍙戠幇鍘熸潵鏄彲浠ョ敤鏈灝忕幆瑙ｈ繖棰樼殑,杞寲涓哄浘鐨勬椂鍊?鎶婃湪鏉跨湅鎴愯竟,鐒跺悗鏈ㄦ澘鐨勬瘡涓鐐歸兘鐪嬫垚涓涓嫭绔嬬殑绔偣,榪欐牱鐨勮瘽,濡傛灉涓ゅ潡鏈ㄦ澘鐩歌繛,灝辨妸浠栦滑鐨勭鐐圭浉榪?騫朵笖鏉冧負(fù)0,鏈ㄦ澘浠ｈ〃鐨勮竟鏉冨間負(fù)鏈ㄦ澘鐨勯暱搴?榪欐牱鐨勮瘽,灝卞彲浠ユ瘮杈冨ソ鐨勮漿鍖栨垚鏈灝忕幆闂浜?鍏蜂綋鐨勫彲浠ョ湅榪欓噷鐨勯檮浠?/a>]
浜庢槸鍙兘鍐嶆兂鍔炴硶浜?鎴戞兂鐨勬槸紜悳,涓嶈繃涓嶇煡閬撹兘涓嶈兘榪?浣嗘槸涓鏃舵病浠涔堝叾浠栫殑濂藉姙娉?灝辨兂榪欐牱鍐欏惂,鎬濊礬濡備笅:
dfs(now,use,l)鍏朵腑now浠ｈ〃褰撳墠鐐?use琛ㄧず鍝釜绔偣鍙敤,l琛ㄧず褰撳墠鐨勯暱搴?閭ｄ箞灝辨瘮杈冨ソ瀹炵幇浜?浠ｇ爜濡備笅,褰撶劧絎竴嬈℃垜娌″姞娉ㄩ噴鎺夌殑閭ｄ竴鍙?br>if(l[榪欎釜鏄瓧姣峫] >= min) continue;鐒跺悗姝誨湪絎?緇勬暟鎹笂,姝諱簡涔嬪悗灝辨兂鑳藉湪鍝紭鍖栦笉,紿佺劧鍙戠幇鍙互鍔犱笂榪欏彞,鍥犱負(fù)濡傛灉褰撳墠鐨勫凡緇忓ぇ浜庣瓑浜庢渶浼樺間簡,閭ｄ箞榪欎釜鍛ㄩ暱灝變笉鍙兘姣旀渶浼樺艱繕鐭?鏀逛簡涔嬪悗灝辮繃浜嗐備笉榪囪繖涓紭鍖栧簲璇ョ涓嬈″氨鎯沖埌鐨?- -||鎯劎 鎴戝綋鏃惰繕鏈変竴涓兂娉?灝辨槸璁板綍涓嬮偅浜?鐜?宸茬粡綆楄繃,閭ｄ箞鍦ㄨ繖涓?鐜?涓婄殑浠ュ叾浠栬竟涓鴻搗鐐圭殑灝變笉鐢ㄧ畻浜?姣斿璇?-2-3褰㈡垚涓涓幆,閭ｄ箞涓寮濮嬩互1涓鴻搗鐐圭畻浜嗚繖涓?鐜?鐨勫懆闀夸簡,榪欐牱鐨勮瘽,灝變笉鐢ㄧ畻浠? 3涓鴻搗鐐圭殑榪欎釜"鐜?鐨勯暱搴︿簡,涓嶈繃鎴戞兂涓嶅嚭鏈変粈涔堝ソ鐨勮褰曟柟娉?鎵浠ュ氨娌″姞浜?濡傛灉閭ｄ釜鏈変粈涔堟兂娉曠殑璇?鍙互鍦ㄤ笅闈㈠啓鍑烘潵銆?br>
ID:qcx97811
LANG:C++
PROG:fence6
*/
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <math.h>
int n;
int used[102][3],val[102];
//used[i][j]琛ㄧず絎琲鍧楃殑絎琷涓鐐規(guī)槸鍚﹀凡鐢?val[i]琛ㄧず絎琲鍧楃殑闀垮害
int idx[102];
//idx[i]絎琲涓殑涓嬫爣
short num[102][102];
//num[i][j]琛ㄧず絎琷鍧楄繛鍦ㄧi鍧楃殑鍝釜绔偣涓?/span>
int next[102][3][102];
//next[i][j][k]絎琲鍧楃殑絎琷涓鐐硅繛鐫鐨勭k涓槸鍝潡
int a[102][2];
//a[i][j]琛ㄧず鍜岀i鍧楁湪鏉跨殑絎琷涓鐐硅繛鍦ㄤ竴璧風(fēng)殑涓鍏辨湁澶氬皯鍧楁湪鏉?/span>
int min;//min:鏈鍚庣殑緇撴灉 t_min:涓棿鐨勬渶浼樺?/span>
int start;//start琛ㄧず浠庨偅鍧楁湪鏉垮嚭鍙?/span>
void dfs(int now,int use,int l)
{//now:褰撳墠鐐圭殑涓嬫爣 use:绔偣鍙敤鎯呭喌 l:褰撳墠璺緞鐨勯暱搴?/span>
int i,j;
int t_use;
if(now == start && (0 != l))
{//宸茬粡鎵懼埌涓涓?"鐜?
if(min > l)
{
min = l;
//printf("%d %d\n",start,l);
}
return ;
}
for(i = 1;i < 3;i++)
{
if(i&use)
{//濡傛灉榪欎釜绔偣鍙敤
for(j = 0;j < a[now][i-1];j++)
{//姣忎婦鍜岃繖涓鐐圭浉榪炵殑閭ｄ簺鏈ㄦ澘
if(0 == used[next[now][i][j]][num[next[now][i][j]][now]])
{//濡傛灉鎺ヤ笅鏉ョ殑閭ｅ潡鏈ㄦ澘鍜岃繖鍧楁湪鏉跨浉榪炵殑榪欎釜绔偣鍙敤
t_use = 0;//綆楄繖涓偣鐨勪笅涓闃舵鐨剈se鍊?br> if(used[next[now][i][j]][0] == 0)
t_use += 1;
if(used[next[now][i][j]][1] == 0)
t_use += 2;
/* if(l >= min) ///榪欓噷涓嶈兘娉ㄩ噴鎺?娉ㄩ噴鎺夊氨TLE --------------------------------------
continue; *//榪欓噷 ===================================
t_use = t_use-num[next[now][i][j]][now];
used[next[now][i][j]][num[next[now][i][j]][now]] = 1;//鏀瑰彉鐘舵?br> dfs(next[now][i][j],t_use,l+val[now]);//涓嬩竴闃舵鐨勬悳绱?/span>
used[next[now][i][j]][num[next[now][i][j]][now]] = 0;//鐘舵佹敼鍥炴潵,鍥炴函
}
}
}
}
}
int main(int argv,char **argc)
{
freopen("fence6.in","r",stdin);
freopen("fence6.out","w",stdout);
int i,j,k;
scanf("%d",&n);
for(i = 0;i < n;i++)
{
scanf("%d",&idx[i]);
scanf("%d",&val[idx[i]]);
scanf("%d%d",&a[idx[i]][0],&a[idx[i]][1]);
for(j = 0;j < a[idx[i]][0];j++)
{
scanf("%d",&k);
num[idx[i]][k] = 1;//榪欎簺鐐硅繛鍦╥dx[i]榪欏潡鏈ㄦ澘鐨勭1涓鐐逛笂
next[idx[i]][1][j] = k;
//絎琲dx[i]鍧楁湪鏉跨殑絎?涓鐐硅繛鐫鐨勭j鍧楁湪鏉跨殑涓嬫爣鏄痥
}
for(j = 0;j < a[idx[i]][1];j++)
{
scanf("%d",&k);
num[idx[i]][k] = 2;
next[idx[i]][2][j] = k;
//娉ㄩ噴鍜屼笂闈㈢浉浼?涓嶈繃榪欓噷鏄idx[i]鍧楁湪鏉跨殑絎?涓鐐?/span>
}
}
min = 999999999;//鍒濆鍖杕in
for(i = 1;i <= n;i++)
{
start = i;//start鐢ㄦ潵鍒ゆ柇鏄惁宸茬粡鏄釜"鐜?浜?br> dfs(i,3,0);
}
printf("%d\n",min);
return 0;
}
]]>
榪欓鍙互鐢ㄦ悳绱紝浣嗘槸鑲畾浼?xì)瓒呮椨灱屾瘯绔熸渶澶?span>100鐩忕伅錛?span>10000嬈℃寜鍘嬨傝繖浜涘彲涓嶆槸灝忔暟鐩紝涓嶈繃鎴戜滑鍙互鐭ラ亾錛屽浜庢瘡涓鐩忕伅錛屾寜鍘嬩袱嬈＄殑鏁堟灉鍜屼笉鎸夊帇鐨勬晥鏋滄槸涓鏍風(fēng)殑銆傝繖鏍蜂竴鍏辨墠鍥涚洀鐏紝涔熷氨鏄垜浠彧瑕佹灇涓?span>16縐嶆儏鍐靛氨OK浜嗐傚綋鐒惰揪鍒扮洰鏍囩姸鎬佸悗錛屾垜浠繕寰楃湅鍓╀笅鐨勬鏁拌兘鍚︽槸鐏殑鐘舵佷笉鍙戠敓鏀瑰彉銆傞氳繃瑙傚療鍙戠幇錛屽彲浠ユ病鐩忕伅涓ゆ鎵鏈夌殑鐏殑鐘舵佷笉鍙戠敓鏀瑰彉錛岃繕鏈夊氨鏄彲浠ユ敼鍙?span>1,2,3榪欎笁鐩忕伅錛屾墍鏈夌伅鐨勭姸鎬佷篃涓嶄細(xì)鍙戠敓鏀瑰彉銆傜劧鍚庢垜浠湅鍓╀笅鐨勭伅鏄笉鏄彲浠ョ敱n涓?span>2鍜?span>m涓?span>3(n,m鍙互涓?span>0)鐩稿姞寰楀埌銆傚鏋滃彲浠ョ殑璇濓紝閭ｄ箞榪欎釜鐘舵佸氨鍙互錛岃褰曚笅鏉ャ傛渶鍚庢垜浠鍏堟帓搴忥紝鐢變簬qsort鍑芥暟瀵逛簩緇存暟緇勬帓搴忎笉鐔燂紝鎵鏈夐噰鐢ㄧ殑鏄啋娉℃帓搴忥紝涓嶈繃榪欐渶澶氫篃灝辨槸16涓厓绱狅紝鎵浠ヨ繕鏄緢蹇殑銆?/span>
鐪嬩簡Analysis涔嬪悗鍙戠幇鍙互綆鍖栧埌鍙冭檻鍓?span>6鐩忕伅錛屽洜涓?span>LCM(1,2,2,3)=6.涔熷氨鏄紑鍏?span>1褰卞搷鐨勬槸姣忔鍔?span>1鐨勭伅錛岀浉搴旂殑2 2 3.鎵浠ヨ秴榪?span>6鐨勯兘鍙互鐢卞墠6鐩忕伅寰楀埌銆傝繖鏍風(fēng)殑璇濆簲璇ヨ繕鍙互鎶?span>6浣嶄簩榪涘埗杞寲鎴?span>10榪涘埗鐒跺悗鐢?span>qsort蹇帓涓涓嬨傝緭鍑轟篃濂藉姙錛屼竴鑸驚鐜緭鍑哄墠6縐嶇姸鎬佺洿鍒拌緭鍑?span>n浣嶄負(fù)姝€?br> 鐩稿簲鐨勫彲浠ョ湅nocow涓婄殑棰樿В
]]>
]]>
]]>