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#include <ncurses.h>
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <unistd.h>
#define s(_)waddstr(W,_)
#define c(_)waddch(W,_)
#define f(f,_)wprintw(W,f,_)
#define n c('\n')
#define r(_,n)for(int _=0;_<n;++_)
#define t(_)G+y*((x+S)%(S+1)+_*x)+(S+1-y)*i
WINDOW*W;char*M="\0" ;int S,R,C,N,E,*L,*T ,F[128], *G=F;void _(){c('+');r(i,8*S-1
){c('-');}c('+');n;} void l(){c('|');r(i, S){r(j,8 ){c(32); }c('\b');c('|');}n;}
void g(){_();r(i,S){ l();s("| ");r(j,S){ if(!*G){ s(" " " | ");}else if(*G>=
1024){f(" %2dk | ", *G/1024);}else{f( "%4d | " ,*G);}++ G;}n;l();if(i<S-1){c
('|' ); r(j,S){r (j,8){c( '-');}c( '\b');if (j<S-1){ c('+');}
}c('|'); n;}}_(); G-=S*S;} int m(int x,int y, int d){C =0;r(i,S
){E=0;L= 0;r(j,S) {T=t(j); if(*T){if (L&& *T== *L){if(d ){*L*=2;
*T=0;}L= 0;C=1;} else{L= t(E);if( d){*L=*T ;}++E;}} }for(;E<
S;++E){T=t(E);C|=*T; if(d){*T =0;}}} return!C;}void p(){E=0;r(i,S*S){if(!G[i]){
++E;}}if(E==0){return ;}N=rand ()%E;r(i ,S*S){if(!G[i]&&--E ==N){G[i]=rand()%8?2
:4;}}}int main(int argc,char **argv){ srand(time(0));initscr();cbreak();noecho();
curs_set(0);getmaxyx (stdscr, R,C);S= argc>1?(*argv[1]-'0' ):4;if(S<=1||S>8){M=
"\1Invalid size giv" "en.\n"; goto q;} W=newwin(0,0,(R-4*S) /2,(C-8*S)/2);if(!W)
{M="\1T" "ermina" "l too " "small." "\n";goto q;}p();p
();while (1){wclear (W);g(); s(" h," "j,k,l:" " move "
" " " q: q" "uit"); wrefresh (W);switch (wgetch(
W)){case 'q':goto q;case'h' :m(1,1,1 );goto e; case'j':
m(-1,S,1);goto e;case 'k':m(1,S,1);goto e; case'l': m(-1,1,1);goto e;e:if
(C){p();}if(m(1,1,0) &m(-1,1,0)&m(1,S,0)& m(-1,S,0 )){M="\0Game over.\n"
;goto q;}usleep(2048 *8);break;}}q:if(W){ delwin(W );}endwin();fputs(M+
1,stderr);return*M;} /*2^11*/
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