int main(void) { int n, i; char s[301][301]; scanf("%d", &n); for (i = 0; i < n; ++i) scanf("%s", s[i]); if (is_cross(s, n)) { puts("YES"); } else { puts("NO"); } return 0; }
OBJECT InsertSym(FULL_CHAR *str, unsigned char xtype, FILE_POS *xfpos, unsigned char xprecedence, BOOLEAN xindefinite, BOOLEAN xrecursive, unsigned xpredefined, OBJECT xenclosing, OBJECT xbody) { register int sum, rlen; register unsigned char *x; OBJECT p, q, s, tmp, link, entry, plink; int len; debug3(DST, DD, "InsertSym( %s, %s, in %s )", Image(xtype), str, SymName(xenclosing)); if( !LexLegalName(str) ) Error(29, 3, "invalid symbol name %s", WARN, xfpos, str); New(s, xtype); FposCopy(fpos(s), *xfpos); has_body(s) = FALSE; filter(s) = nilobj; use_invocation(s) = nilobj; imports(s) = nilobj; imports_encl(s) = FALSE; right_assoc(s) = TRUE; precedence(s) = xprecedence; indefinite(s) = xindefinite; recursive(s) = xrecursive; predefined(s) = xpredefined; enclosing(s) = xenclosing; sym_body(s) = xbody; base_uses(s) = nilobj; uses(s) = nilobj; marker(s) = nilobj; cross_sym(s) = nilobj; is_extern_target(s) = FALSE; uses_extern_target(s)= FALSE; visible(s) = FALSE; uses_galley(s) = FALSE; horiz_galley(s) = ROWM; has_compulsory(s) = 0; is_compulsory(s) = FALSE; uses_count(s) = 0; dirty(s) = FALSE; if( enclosing(s) != nilobj && type(enclosing(s)) == NPAR ) dirty(s) = dirty(enclosing(s)) = TRUE; has_par(s) = FALSE; has_lpar(s) = FALSE; has_rpar(s) = FALSE; if( is_par(type(s)) ) has_par(enclosing(s)) = TRUE; if( type(s) == LPAR ) has_lpar(enclosing(s)) = TRUE; if( type(s) == RPAR ) has_rpar(enclosing(s)) = TRUE; /* assign a code letter between a and z to any NPAR symbol */ if( type(s) == NPAR ) { if( LastDown(enclosing(s)) != enclosing(s) ) { Child(tmp, LastDown(enclosing(s))); if( type(tmp) == NPAR ) { if( npar_code(tmp) == 'z' || npar_code(tmp) == ' ' ) npar_code(s) = ' '; else npar_code(s) = npar_code(tmp)+1; } else npar_code(s) = 'a'; } else npar_code(s) = 'a'; } has_target(s) = FALSE; force_target(s) = FALSE; if( !StringEqual(str, KW_TARGET) ) is_target(s) = FALSE; else { is_target(s) = has_target(enclosing(s)) = TRUE; /* if @Target is found after @Key, take note of external target */ if( has_key(enclosing(s)) && xbody != nilobj && is_cross(type(xbody)) ) { if( LastDown(xbody) != Down(xbody) ) { OBJECT sym; Child(sym, Down(xbody)); if( type(sym) == CLOSURE ) { is_extern_target(actual(sym)) = TRUE; uses_extern_target(actual(sym)) = TRUE; } } } } has_tag(s) = is_tag(s) = FALSE; has_key(s) = is_key(s) = FALSE; has_optimize(s) = is_optimize(s) = FALSE; has_merge(s) = is_merge(s) = FALSE; has_enclose(s) = is_enclose(s) = FALSE; if( enclosing(s) != nilobj && type(enclosing(s)) == LOCAL ) { if( StringEqual(str, KW_TAG) ) is_tag(s) = has_tag(enclosing(s)) = dirty(enclosing(s)) = TRUE; if( StringEqual(str, KW_OPTIMIZE) ) is_optimize(s) = has_optimize(enclosing(s)) = TRUE; if( StringEqual(str, KW_KEY) ) { is_key(s) = has_key(enclosing(s)) = dirty(enclosing(s)) = TRUE; /* if @Key is found after @Target, take note of external target */ for( link=Down(enclosing(s)); link!=enclosing(s); link=NextDown(link) ) { Child(p, link); if( is_target(p) && sym_body(p)!=nilobj && is_cross(type(sym_body(p))) ) { OBJECT sym; Child(sym, Down(sym_body(p))); if( type(sym) == CLOSURE ) { is_extern_target(actual(sym)) = TRUE; uses_extern_target(actual(sym)) = TRUE; } } } } if( StringEqual(str, KW_MERGE) ) is_merge(s) = has_merge(enclosing(s)) = TRUE; if( StringEqual(str, KW_ENCLOSE) ) is_enclose(s) = has_enclose(enclosing(s)) = TRUE; } if( StringEqual(str, KW_FILTER) ) { if( type(s) != LOCAL || enclosing(s) == StartSym ) Error(29, 4, "%s must be a local definition", WARN, &fpos(s), str); else if( !has_rpar(enclosing(s)) ) Error(29, 14, "%s must lie within a symbol with a right parameter", WARN, &fpos(s), KW_FILTER); else { filter(enclosing(s)) = s; precedence(enclosing(s)) = FILTER_PREC; } } if( type(s) == RPAR && has_body(enclosing(s)) && (is_tag(s) || is_key(s) || is_optimize(s)) ) Error(29, 5, "a body parameter may not be named %s", WARN, &fpos(s), str); if( type(s) == RPAR && has_target(enclosing(s)) && (is_tag(s) || is_key(s) || is_optimize(s)) ) Error(29, 6, "the right parameter of a galley may not be called %s", WARN, &fpos(s), str); len = StringLength(str); hash(str, len, sum); ifdebug(DST, D, sym_spread[sum]++; sym_count++); entry = (OBJECT) &symtab[sum]; for( plink = Down(entry); plink != entry; plink = NextDown(plink) ) { Child(p, plink); if( length(p) == len && StringEqual(str, string(p)) ) { for( link = Down(p); link != p; link = NextDown(link) ) { Child(q, link); if( enclosing(s) == enclosing(q) ) { Error(29, 7, "symbol %s previously defined at%s", WARN, &fpos(s), str, EchoFilePos(&fpos(q)) ); if( AltErrorFormat ) { Error(29, 13, "symbol %s previously defined here", WARN, &fpos(q), str); } break; } } goto wrapup; } } /* need a new OBJECT as well as s */ NewWord(p, WORD, len, xfpos); length(p) = len; StringCopy(string(p), str); Link(entry, p); wrapup: Link(p, s); if( enclosing(s) != nilobj ) Link(enclosing(s), s); debug2(DST, DD, "InsertSym Link(%s, %s) and returning.", SymName(enclosing(s)), SymName(s)); return s; } /* end InsertSym */
static inline bool is_cross(const MergeContour &mc1, const MergeContour &mc2) { return is_cross(mc1.center, mc1.radius, mc2.center, mc2.radius); }