魔咒词典
Time Limit: 8000/5000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others)
Total Submission(s): 471 Accepted Submission(s): 121
Problem Description
哈利波特在魔法学校的必修课之一就是学习魔咒。据说魔法世界有100000种不同的魔咒,哈利很难全部记住,但是为了对抗强敌,他必须在危急时刻能够调用任何一个需要的魔咒,所以他需要你的帮助。
给你一部魔咒词典。当哈利听到一个魔咒时,你的程序必须告诉他那个魔咒的功能;当哈利需要某个功能但不知道该用什么魔咒时,你的程序要替他找到相应的魔咒。如果他要的魔咒不在词典中,就输出“what?”
Input
首先列出词典中不超过100000条不同的魔咒词条,每条格式为:
[魔咒] 对应功能
其中“魔咒”和“对应功能”分别为长度不超过20和80的字符串,字符串中保证不包含字符“[”和“]”,且“]”和后面的字符串之间有且仅有一个空格。词典最后一行以“@END@”结束,这一行不属于词典中的词条。
词典之后的一行包含正整数N(<=1000),随后是N个测试用例。每个测试用例占一行,或者给出“[魔咒]”,或者给出“对应功能”。
Output
每个测试用例的输出占一行,输出魔咒对应的功能,或者功能对应的魔咒。如果魔咒不在词典中,就输出“what?”
Sample Input
[expelliarmus] the disarming charm
[rictusempra] send a jet of silver light to hit the enemy
[tarantallegra] control the movement of one's legs
[serpensortia] shoot a snake out of the end of one's wand
[lumos] light the wand
[obliviate] the memory charm
[expecto patronum] send a Patronus to the dementors
[accio] the summoning charm
@END@
4
[lumos]
the summoning charm
[arha]
take me to the sky
Sample Output
light the wand
accio
what?
what?
#include #include using namespace std; const int BUK_SZ = 786433; // prime int hcurse[BUK_SZ]; int hmean[BUK_SZ]; // see [Weiss05] P108 int my_hash( const char* key, int len ) { int h = 0, inc = len > 40 ? 2 : 1; for( int i = 0; i < len; i += inc ) h = 37 * h + key[i]; h %= BUK_SZ; if( h < 0 ) h += BUK_SZ; return h; } struct node { char curse[20], mean[80]; short lc, lm; void parse( char* line, int n ) { ++line; char *pc = curse, *pm = mean; while( *line != ']' ) *pc++ = *line++; lc = pc - curse; line += 2; while( *line ) *pm++ = *line++; lm = pm - mean; hcurse[hash_pos(hcurse,curse,lc)] = n; hmean[hash_pos(hmean,mean,lm)] = n; } int hash_pos( int* ph, const char* s, int len ) { int h= my_hash( s, len ); while( ph[h] != 0 ) ++h; // collide return h; } } dict[100001]; int get_mean( const char* s, int len ) { int h = my_hash( s, len ); while( hcurse[h] != 0 ) { if( dict[hcurse[h]].lc == len && memcmp( dict[hcurse[h]].curse, s, len ) == 0 ) return hcurse[h]; ++h; } return 0; } int get_curse( const char* s, int len ) { int h = my_hash( s, len ); while( hmean[h] != 0 ) { if( dict[hmean[h]].lm == len && memcmp( dict[hmean[h]].mean, s, len ) == 0 ) return hmean[h]; ++h; } return 0; } int main( ) { char line[110]; int n = 1; while( cin.getline(line,110),line[0]!='@' ){ dict[n].parse( line, n ); ++n; } for( (cin>>n).get(); n--; ) { cin.getline( line, 110 ); if( line[0] == '[' ) { int p = get_mean( line+1, strlen(line)-2 ); if( p == 0 ) cout << "what?"; else cout.write( dict[p].mean, dict[p].lm ); } else { int p = get_curse( line, strlen(line) ); if( p == 0 ) cout << "what?"; else cout.write( dict[p].curse, dict[p].lc ); } cout << '/n'; } }