\u0110\u1ecbnh ngh\u0129a v\u1ec1 thu\u1eadt to\u00e1n t\u00e0i x\u1ec9u<\/figcaption><\/figure>\nThu\u1eadt to\u00e1n t\u00e0i x\u1ec9u l\u00e0 m\u1ed9t d\u00e3y s\u1ed1 hay m\u1ed9t c\u00f4ng th\u1ee9c \u0111\u01b0\u1ee3c t\u00ednh to\u00e1n ra nh\u01b0 m\u1ed9t ph\u01b0\u01a1ng ph\u00e1p soi c\u1ea7u. Thu\u1eadt to\u00e1n n\u00e0y \u0111\u01b0\u1ee3c l\u1ea5y th\u00f4ng tin t\u1eeb nh\u1eefng v\u00e1n ch\u01a1i tr\u01b0\u1edbc \u0111\u00f3. M\u1ed9t khi b\u1ea1n \u0111\u00e3 n\u1eafm \u0111\u01b0\u1ee3c nguy\u00ean l\u00fd v\u00e0 c\u00f4ng th\u1ee9c ch\u01a1i t\u00e0i x\u1ec9u r\u1ed3i th\u00ec ch\u00fang ta s\u1ebd d\u1ec5 d\u00e0ng ch\u1ea1m \u0111\u1ebfn th\u00e0nh c\u00f4ng h\u01a1n.\u00a0<\/span><\/p>\nTuy nhi\u00ean, kh\u00f4ng ph\u1ea3i l\u00fac n\u00e0o x\u00fac x\u1eafc c\u0169ng \u0111\u1ed5 theo nguy\u00ean l\u00fd v\u00e0 thu\u1eadt to\u00e1n m\u00e0 b\u1ea1n bi\u1ebft. C\u00f3 r\u1ea5t nhi\u1ec1u tr\u01b0\u1eddng h\u1ee3p x\u1ea3y ra khi tung x\u00fac x\u1eafc. <\/span><\/p>\nCh\u00fang li\u00ean t\u1ee5c c\u00f3 s\u1ef1 thay \u0111\u1ed5i, ng\u01b0\u1eddi ch\u01a1i c\u1ea7n ph\u1ea3i luy\u1ec7n t\u1eadp v\u00e0 k\u1ebft h\u1ee3p v\u1edbi s\u1ef1 nhanh nh\u1ea1y c\u1ee7a m\u00ecnh th\u00ec m\u1edbi c\u00f3 th\u1ec3 n\u1eafm \u0111\u01b0\u1ee3c nh\u1eefng tr\u01b0\u1eddng h\u1ee3p c\u00f3 th\u1ec3 x\u1ea3y ra. <\/span><\/p>\nTham gia t\u00e0i x\u1ec9u, ng\u01b0\u1eddi ch\u01a1i c\u0169ng ph\u1ea3i t\u1eadp trung \u0111\u1ec3 \u0111\u01b0a ra nh\u1eefng quy\u1ebft \u0111\u1ecbnh ph\u00f9 h\u1ee3p nh\u1ea5t v\u00e0 d\u00e0nh chi\u1ebfn th\u1eafng.\u00a0<\/span><\/p>\n2. C\u00e1c thu\u1eadt to\u00e1n t\u00e0i x\u1ec9u online c\u1ee7a cao th\u1ee7\u00a0<\/b><\/h2>\n
C\u00e1c thu\u1eadt to\u00e1n t\u00e0i x\u1ec9u online c\u1ee7a cao th\u1ee7<\/figcaption><\/figure>\n2.1 D\u1ef1a tr\u00ean b\u1ea3ng thu\u1eadt to\u00e1n t\u00e0i x\u1ec9u\u00a0<\/b><\/h3>\n
D\u1ef1a v\u00e0o b\u1ea3ng thu\u1eadt to\u00e1n t\u00e0i x\u1ec9u nh\u01b0 tr\u00ean h\u00ecnh, n\u1ebfu nh\u01b0 l\u00e0 ng\u01b0\u1eddi ch\u01a1i t\u00e0i x\u1ec9u l\u00e2u n\u0103m, ch\u1eafc ch\u1eafn s\u1ebd hi\u1ec3u ngay v\u1ec1 quy lu\u1eadt n\u00e0y. <\/span><\/p>\nNh\u1eefng ng\u01b0\u1eddi m\u1edbi nh\u1eadp m\u00f4n c\u00f3 th\u1ec3 hi\u1ec3u tr\u00ean \u0111\u00e2y ch\u00ednh l\u00e0 nguy\u00ean l\u00fd m\u00e0 x\u00e1c su\u1ea5t x\u00fac s\u1eafc ra kh\u00e1 cao. <\/span><\/p>\nNh\u1eefng con s\u1ed1 n\u00e0y ch\u00ednh l\u00e0 s\u1ed1 sau khi nh\u00e0 c\u00e1i \u0111\u1ed5 x\u00fac x\u1eafc. 3 con s\u1ed1 \u0111\u1ee9ng c\u1ea1nh nhau ch\u00ednh l\u00e0 c\u00e1c m\u1eb7t m\u00e0 x\u00fac x\u1eafc xu\u1ea5t hi\u1ec7n. D\u1ef1a tr\u00ean thu\u1eadt to\u00e1n n\u00e0y, b\u1ea1n c\u0169ng d\u1ec5 d\u00e0ng d\u1ef1 \u0111o\u00e1n \u0111\u01b0\u1ee3c v\u00e1n sau s\u1ebd ra con s\u1ed1 n\u00e0o.\u00a0<\/span><\/p>\nThu\u1eadt to\u00e1n n\u00e0y mang \u0111\u1ebfn cho b\u1ea1n kh\u1ea3 n\u0103ng \u0103n c\u01b0\u1ee3c cao h\u01a1n, nh\u01b0ng \u0111\u00f3 ch\u1ec9 l\u00e0 s\u1ed1 li\u1ec7u \u0111\u01b0\u1ee3c th\u1ed1ng k\u00ea. V\u00e0 k\u1ebft qu\u1ea3 kh\u00f4ng ho\u00e0n to\u00e0n tuy\u1ec7t \u0111\u1ed1i. <\/span><\/p>\nGi\u1ea3 s\u1eed v\u00e1n \u0111\u1ea7u b\u1ea1n th\u1ea5y k\u1ebft qu\u1ea3 x\u00fac x\u1eafc ra v\u1edbi c\u00e1c m\u1eb7t c\u00f3 s\u1ed1 l\u00e0 561 th\u00ec b\u1ea1n c\u00f3 th\u1ec3 l\u1ef1a ch\u1ecdn s\u1ed1 ti\u1ebfp theo l\u00e0 221 nh\u01b0 b\u1ea3ng thu\u1eadt to\u00e1n \u1edf tr\u00ean.<\/span><\/p>\n T\u1eeb \u0111\u00f3, kh\u1ea3 n\u0103ng cao t\u1ed5ng c\u1ee7a c\u00e1c m\u1eb7t l\u00e0 5 v\u00e0 b\u1ea1n s\u1ebd c\u01b0\u1ee3c v\u00e0o c\u1eeda x\u1ec9u. N\u1ebfu nh\u01b0 b\u1ea1n th\u1ea5y k\u1ebft qu\u1ea3 ra \u0111\u00fang v\u1edbi thu\u1eadt to\u00e1n th\u00ec c\u00f3 th\u1ec3 \u00e1p d\u1ee5ng chu\u1ed7i \u0111\u00e1nh cho nh\u1eefng v\u00e1n ti\u1ebfp theo \u0111\u00f3.\u00a0<\/span><\/p>\n2.2 Thu\u1eadt to\u00e1n (A*2 + B + C) : 6<\/b><\/h3>\n
Trong c\u00f4ng th\u1ee9c n\u00e0y, b\u1ea1n s\u1ebd l\u1ea5y A, B, C \u0111\u00e2y l\u00e0 k\u1ebft qu\u1ea3 c\u1ee7a ba m\u1eb7t x\u00fac x\u1eafc s\u1ebd xu\u1ea5t hi\u1ec7n sau khi \u0111\u1ed5 x\u00fac x\u1eafc. C\u00f4ng th\u1ee9c \u0111\u01b0\u1ee3c t\u00ednh s\u1ebd \u00e1p d\u1ee5ng trong v\u00e1n ch\u01a1i n\u00e0y s\u1ebd \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng nh\u1eb1m d\u1ef1 \u0111o\u00e1n cho v\u00e1n ch\u01a1i ti\u1ebfp theo. K\u1ebft qu\u1ea3 c\u1ee7a c\u00f4ng th\u1ee9c n\u00e0y s\u1ebd \u0111\u01b0\u1ee3c chia l\u00e0m 2 nh\u00f3m c\u1ee5 th\u1ec3 nh\u01b0 sau:<\/span><\/p>\n\n- Sau khi t\u00ednh to\u00e1n m\u00e0 d\u01b0 0, 1, 3 th\u00ec b\u1ea1n s\u1ebd l\u1ef1a ch\u1ecdn \u0111\u1eb7t c\u1eeda t\u00e0i.<\/span><\/li>\n
- Sau khi t\u00ednh to\u00e1n m\u00e0 s\u1ed1 d\u01b0 l\u00e0 2, 4, 5 th\u00ec b\u1ea1n s\u1ebd ch\u1ecdn \u0111\u1eb7t c\u1eeda x\u1ec9u.<\/span><\/li>\n<\/ul>\n
Chi ti\u1ebft nh\u01b0 sau, sau khi \u0111\u1ed5 x\u00fac x\u1eafc l\u00e0: A=1, B=2, C=5. \u00c1p d\u1ee5ng c\u00f4ng th\u1ee9c (A*2 + B + C) : 6 ch\u00fang ta s\u1ebd c\u00f3 (1*2 + 2 + 5) : 6 = 9 d\u01b0 3. K\u1ebft qu\u1ea3 s\u1ebd ra c\u1eeda t\u00e0i \u0111\u00fang v\u1edbi d\u1ef1 \u0111o\u00e1n ban \u0111\u1ea7u sau khi t\u00ednh c\u00f4ng th\u1ee9c t\u00e0i x\u1ec9u.<\/span><\/p>\n2.3 Thu\u1eadt to\u00e1n (A+ B + C + 2) \u2013 6<\/b><\/h3>\n
V\u1edbi thu\u1eadt to\u00e1n n\u00e0y th\u00ec ch\u00fang ta s\u1ebd \u0111\u01b0\u1ee3c 2 k\u1ebft qu\u1ea3 nh\u01b0 sau. Tuy nhi\u00ean, m\u1ed9t \u0111i\u1ec1u l\u01b0u \u00fd nh\u1ecf l\u00e0 n\u1ebfu A=3 th\u00ec b\u1ea1n b\u1ecf v\u00e1n \u0111\u00f3 v\u00e0 kh\u00f4ng \u0111\u00e1nh.<\/span><\/p>\n\n- N\u1ebfu nh\u01b0 \u00e1p d\u1ee5ng k\u1ebft qu\u1ea3 v\u00e0o c\u00f4ng th\u1ee9c v\u00e0 cho ra 1, 3, 5 th\u00ec b\u1ea1n s\u1ebd ch\u1ecdn t\u00e0i cho v\u00e1n sau.<\/span><\/li>\n
- N\u1ebfu nh\u01b0 \u00e1p d\u1ee5ng k\u1ebft qu\u1ea3 v\u00e0o c\u00f4ng th\u1ee9c cho ra 0, 2, 4 th\u00ec b\u1ea1n ch\u1ecdn x\u1ec9u cho v\u00e1n sau.<\/span><\/li>\n<\/ul>\n
V\u1edbi v\u00ed d\u1ee5 minh h\u1ecda: (5 + 3 + 1 + 2) \u2013 6 = 5, k\u1ebft qu\u1ea3 n\u00e0y s\u1ebd cho bi\u1ebft v\u00e1n sau b\u1ea1n n\u00ean \u0111\u1eb7t v\u00e0o c\u1eeda t\u00e0i.\u00a0<\/span><\/p>\n