{"id":18405,"date":"2024-04-26T19:08:40","date_gmt":"2024-04-26T19:08:40","guid":{"rendered":"https:\/\/soicau3034.minhngocxoso.com\/?p=18405"},"modified":"2024-04-26T19:08:40","modified_gmt":"2024-04-26T19:08:40","slug":"cach-bat-lo-theo-tong-dac-biet-tram-tran-tram-thang","status":"publish","type":"post","link":"https:\/\/caudepbachthulo.com\/cach-bat-lo-theo-tong-dac-biet-tram-tran-tram-thang\/","title":{"rendered":"c\u00e1ch b\u1eaft l\u00f4 theo t\u1ed5ng \u0111\u1eb7c bi\u1ec7t tr\u0103m tr\u1eadn tr\u0103m th\u1eafng"},"content":{"rendered":"
C\u00e1ch b\u1eaft l\u00f4 theo t\u1ed5ng \u0111\u1eb7c bi\u1ec7t l\u00e0 ph\u01b0\u01a1ng ph\u00e1p soi c\u1ea7u kh\u00e1 ph\u1ed5 bi\u1ebfn. C\u00e1ch ch\u01a1i n\u00e0y s\u1eed d\u1ee5ng gi\u1ea3i \u0111\u1eb7c bi\u1ec7t c\u1ee7a ng\u00e0y h\u00f4m tr\u01b0\u1edbc \u0111\u1ec3 soi c\u1ea7u \u0111\u00e1nh \u0111\u1ec1 h\u00f4m nay. Theo ch\u00e2n nh\u1eefng chuy\u00ean gia soi c\u1ea7u, ch\u00fang ta s\u1ebd c\u00f9ng t\u00ecm hi\u1ec3u chi ti\u1ebft c\u00e1ch b\u1eaft l\u00f4 n\u00e0y.<\/p>\n
<\/p>\n
\u0110\u00e2y l\u00e0 ph\u01b0\u01a1ng ph\u00e1p soi c\u1ea7u v\u00e0 ch\u1ed1t s\u1ed1 \u0111i\u1ec3n h\u00ecnh. C\u00e1ch soi t\u1eadp trung v\u00e0o gi\u1ea3i \u0111\u1eb7c bi\u1ec7t. N\u00f3 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng ri\u00eang l\u1ebb ho\u1eb7c k\u1ebft h\u1ee3p v\u1edbi nhi\u1ec1u ph\u01b0\u01a1ng ph\u00e1p soi c\u1ea7u kh\u00e1c \u0111\u1ec3 cho ra m\u1ed9t con s\u1ed1 \u0111\u1eb9p, gi\u00fap anh em th\u00eam t\u1ef1 tin v\u00e0 \u0111\u1eb7t c\u01b0\u1ee3c con s\u1ed1 m\u00ecnh \u0111\u00e3 ch\u1eafc ch\u1eafn.<\/p>\n
N\u1ebfu l\u00e0 m\u1ed9t tay ch\u01a1i chuy\u00ean nghi\u1ec7p, b\u1ea1n s\u1ebd kh\u00f4ng m\u1ea5y xa l\u1ea1 v\u1edbi c\u00e1ch b\u1eaft l\u00f4 theo t\u1ed5ng \u0111\u1eb7c bi\u1ec7t n\u00e0y. G\u1ea7n nh\u01b0 m\u1ed7i l\u1ea7n ch\u01a1i l\u00e0 m\u1ed7i l\u1ea7n th\u1eafng. Tuy nhi\u00ean, \u0111\u1ec3 \u0111\u1ea1t \u0111\u1ebfn ng\u01b0\u1ee1ng \u0111\u1eb3ng c\u1ea5p th\u01b0\u1ee3ng th\u1eeba n\u00e0y, th\u00ec anh em c\u1ea7n tr\u1ea3i qua m\u1ed9t qu\u00e1 tr\u00ecnh d\u00e0i d\u00e0y c\u00f4ng nghi\u00ean c\u1ee9u v\u1edbi tr\u00ed tu\u1ec7 v\u00e0 tinh th\u1ea7n m\u1eabn ti\u1ec7p nh\u1ea5t. D\u0129 nhi\u00ean, c\u0169ng \u0111\u00e3 thua kh\u00f4ng \u00edt l\u1ea7n.<\/p>\n
C\u00f3 kh\u00e1 nhi\u1ec1u ph\u01b0\u01a1ng ph\u00e1p b\u1eaft l\u00f4 theo t\u1ed5ng \u0111\u1eb7c bi\u1ec7t. Ph\u1ed5 bi\u1ebfn v\u00e0 \u0111\u01a1n gi\u1ea3n nh\u1ea5t ch\u00ednh l\u00e0 s\u1eed d\u1ee5ng 4 c\u00e1ch b\u1eaft l\u00f4 sau \u0111\u00e2y:<\/p>\n
\u0110\u1ec3 b\u1eaft l\u00f4 theo c\u00e1ch n\u00e0y, tr\u01b0\u1edbc ti\u00ean b\u1ea1n c\u1ea7n c\u00f3 k\u1ebft qu\u1ea3 gi\u1ea3i \u0111\u1eb7c bi\u1ec7t c\u1ee7a ng\u00e0y h\u00f4m tr\u01b0\u1edbc. T\u00ednh t\u1ed5ng c\u1ee7a gi\u1ea3i \u0111\u1eb7c bi\u1ec7t \u0111\u00f3 v\u00e0 ti\u1ebfn h\u00e0nh \u0111\u00e1nh d\u00e0n \u0111\u1ec1 theo t\u1ed5ng cho ng\u00e0y h\u00f4m sau. Ho\u1eb7c n\u1ebfu kh\u00f4ng th\u00edch ch\u01a1i d\u00e0n \u0111\u1ec1 th\u00ec c\u00f3 th\u1ec3 ch\u1ecdn ra m\u1ed9t con s\u1ed1 \u01b0ng \u00fd nh\u1ea5t trong d\u00e0n \u0111\u1ec1 \u0111\u00f3 \u0111\u1ec3 \u0111\u00e1nh.<\/p>\n
V\u00ed d\u1ee5: K\u1ebft qu\u1ea3 \u0111\u1eb7c bi\u1ec7t h\u00f4m nay v\u1ec1 con 123456. C\u1ed9ng l\u1ea1i ta c\u00f3: 1 + 2 + 3 + 4 + 5 + 6 = 21. 2 + 1 = 3. nh\u01b0 v\u1eady, b\u1ea1n c\u00f3 th\u1ec3 \u0111\u00e1nh d\u00e0n \u0111\u1ec1 li\u00ean quan: 21, 03, 30.<\/p>\n
\u0110\u00e2y c\u0169ng l\u00e0 m\u1ed9t trong nh\u1eefng c\u00e1ch b\u1eaft l\u00f4 t\u1ed5ng kh\u00e1 \u0111\u01a1n gi\u1ea3n. C\u00e1ch ch\u01a1i n\u00e0y \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n nh\u01b0 sau:<\/p>\n
Ch\u1ecdn k\u1ebft qu\u1ea3 x\u1ed5 s\u1ed1 \u0111\u1eb7c bi\u1ec7t k\u1ef3 tr\u01b0\u1edbc. C\u1ed9ng t\u1ea5t c\u1ea3 c\u00e1c s\u1ed1 l\u1ea1i v\u1edbi nhau. Sau \u0111\u00f3 \u0111\u00e1nh l\u00f4 d\u1ef1a v\u00e0o t\u1ed5ng n\u00e0y.<\/p>\n
V\u00ed d\u1ee5, gi\u1ea3i \u0111\u1eb7c bi\u1ec7t k\u1ef3 tr\u01b0\u1edbc v\u1ec1: 123456. C\u1ed9ng l\u1ea1i ta c\u00f3 t\u1ed5ng c\u00e1c s\u1ed1 l\u00e0 21. Nh\u01b0 v\u1eady, anh em c\u00f3 th\u1ec3 \u0111\u00e1nh 2 con \u0111\u1ec1 21 v\u00e0 12. Tr\u01b0\u1edbc khi \u0111\u00e1nh em em c\u00f3 th\u1ec3 xem x\u00e9t th\u1ed1ng k\u00ea trong v\u00e0i tu\u1ea7n. N\u1ebfu t\u1ea7n su\u1ea5t xu\u1ea5t hi\u1ec7n nhi\u1ec1u, nh\u1ecbp \u0111i t\u1ed1t th\u00ec h\u00e3y \u00e1p d\u1ee5ng.<\/p>\n Soi c\u1ea7u b\u1ea1c nh\u1edb c\u1ea7n ph\u1ea3i v\u1eadn d\u1ee5ng kh\u1ea3 n\u0103ng suy \u0111o\u00e1n c\u1ee7a ng\u01b0\u1eddi ch\u01a1i. C\u00e1ch n\u00e0y kh\u00f4ng d\u00e0nh cho nh\u1eefng ai thi\u1ebfu s\u1ef1 th\u1ed1ng k\u00ea c\u0169ng nh\u01b0 ph\u00e2n t\u00edch th\u1ea5u \u0111\u00e1o. \u0110\u1ec3 b\u1eaft l\u00f4 t\u1ed5ng gi\u1ea3i \u0111\u1eb7c bi\u1ec7t theo c\u00e1ch n\u00e0y, anh em c\u1ea7n th\u1ef1c hi\u1ec7n theo chi\u1ebfn thu\u1eadt sau:<\/p>\n D\u1ef1a theo c\u00e1c quy lu\u1eadt n\u00e0y, anh em s\u1ebd ph\u00e2n t\u00edch gi\u1ea3i \u0111\u1eb7c bi\u1ec7t v\u00e0 \u0111\u00e1nh l\u00f4 \u0111u\u00f4i hi\u1ec7u qu\u1ea3 nh\u1ea5t. Nh\u01b0ng c\u00e1ch n\u00e0y r\u1ea5t kh\u00f3, g\u1ea7n nh\u01b0 ch\u1ec9 d\u00e2n chuy\u00ean nghi\u1ec7p m\u1edbi c\u00f3 th\u1ec3 \u00e1p d\u1ee5ng th\u00e0nh c\u00f4ng.<\/p>\n C\u00e1ch n\u00e0y ch\u1ec9 \u00e1p d\u1ee5ng \u0111\u01b0\u1ee3c v\u1edbi l\u00f4 \u0111\u1ec1 mi\u1ec1n B\u1eafc. V\u00ec gi\u1ea3i \u0111\u1eb7c bi\u1ec7t c\u1ee7a x\u1ed5 s\u1ed1 mi\u1ec1n B\u1eafc g\u1ed3m 5 s\u1ed1. C\u00e1ch b\u1eaft l\u00f4 t\u1ed5ng gi\u1ea3i \u0111\u1eb7c bi\u1ec7t tr\u01b0\u1eddng h\u1ee3p n\u00e0y s\u1ebd s\u1eed d\u1ee5ng c\u1ea3 gi\u1ea3i \u0111\u1eb7c bi\u1ec7t v\u00e0 gi\u1ea3i nh\u1ea5t. Theo \u0111\u00f3, anh em ti\u1ebfn h\u00e0nh gh\u00e9p c\u00e1c s\u1ed1 c\u1ee7a 2 gi\u1ea3i n\u00e0y v\u1edbi nhau. Sau \u0111\u00f3 c\u1ed9ng d\u1ed3n l\u1ea1i 2 s\u1ed1 t\u1eeb tr\u00e1i sang ph\u1ea3i. N\u1ebfu k\u1ebft qu\u1ea3 c\u1ed9ng 2 s\u1ed1 l\u1edbn h\u01a1n 10 th\u00ec l\u1ea5y s\u1ed1 h\u00e0ng \u0111\u01a1n v\u1ecb. C\u1ee9 c\u1ed9ng li\u00ean t\u1ee5c nh\u01b0 v\u1eady cho \u0111\u1ebfn khi k\u1ebft qu\u1ea3 c\u00f2n l\u1ea1i 2 s\u1ed1. \u0110\u00e2y s\u1ebd l\u00e0 c\u1eb7p s\u1ed1 m\u00e0 b\u1ea1n s\u1ebd nu\u00f4i trong 3 ng\u00e0y k\u1ebf ti\u1ebfp.<\/p>\n V\u00ed d\u1ee5: Gi\u1ea3i \u0111\u1eb7c bi\u1ec7t: 12345. Gi\u1ea3i nh\u1ea5t: 54321. Gh\u00e9p l\u1ea1i ta c\u00f3 d\u00e3y s\u1ed1: 1234554321. Ti\u1ebfn h\u00e0nh c\u1ed9ng d\u1ed3n 2 s\u1ed1 t\u1eeb tr\u00e1i qua ph\u1ea3i v\u00e0 ch\u1ec9 l\u1ea5y h\u00e0ng \u0111\u01a1n v\u1ecb n\u1ebfu t\u1ed5ng 2 s\u1ed1 l\u1edbn h\u01a1n 10. Ta c\u00f3 d\u00e3y s\u1ed1 m\u1edbi nh\u01b0 sau:<\/p>\n (1 + 2 )(2 + 3)(3 + 4) (4 + 5)(5 + 4)(4 + 3)(3 + 2)(2 + 1) = 35799753. Ti\u1ebfp t\u1ee5c c\u1ed9ng theo quy lu\u1eadt n\u00e0y, ta c\u00f3 k\u1ebft qu\u1ea3 cu\u1ed1i c\u00f9ng l\u00e0 00. Ch\u00fang ta s\u1ebd ti\u1ebfn h\u00e0nh nu\u00f4i con l\u00f4 n\u00e0y.<\/p>\n Tr\u00ean \u0111\u00e2y l\u00e0 to\u00e0n b\u1ed9 nh\u1eefng c\u00e1ch b\u1eaft l\u00f4 theo t\u1ed5ng \u0111\u1eb7c bi\u1ec7t. Khi m\u1edbi ti\u1ebfn h\u00e0nh b\u1eaft l\u00f4 theo c\u00e1ch n\u00e0y, ch\u1eafc ch\u1eafn anh em s\u1ebd c\u00f3 nhi\u1ec1u l\u00fang t\u00fang. Tuy nhi\u00ean v\u1eadn d\u1ee5ng m\u1ed9t th\u1eddi gian th\u00ec s\u1ebd thu\u1ea7n th\u1ee5c v\u00e0 ch\u1eafc ch\u1eafn anh em s\u1ebd c\u00f3 th\u00eam m\u1ed9t chi\u1ebfn thu\u1eadt hi\u1ec7u qu\u1ea3 \u0111\u1ec3 ch\u01a1i \u0111\u1ec1 tr\u0103m tr\u1eadn tr\u0103m th\u1eafng.<\/p>\n<\/div>\n<\/div>\nD\u00f9ng ph\u01b0\u01a1ng ph\u00e1p c\u1ea7u b\u1ea1c nh\u1edb<\/h3>\n
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T\u00ednh t\u1ed5ng \u0111\u1eb7c bi\u1ec7t v\u1edbi tam gi\u00e1c Pascal<\/h3>\n
K\u1ebft lu\u1eadn<\/h2>\n
ch\u1ed1t s\u1ed1 c\u1ea7u \u0111\u1eb9p cao c\u1ea5p<\/span><\/strong><\/h4>\n