Ch\u00fang ta \u0111\u1ec1u \u0111\u00e3 nghe v\u1ec1 c\u1ee5m t\u1eeb k\u1ef9 s\u01b0 10x, ph\u1ea3i kh\u00f4ng? B\u1ea1n c\u00f3 bi\u1ebft r\u1eb1ng nghi\u00ean c\u1ee9u trong nh\u1eefng n\u0103m 1960 th\u1ef1c s\u1ef1 t\u1eebng \u0111\u1ec1 c\u1eadp \u0111\u1ebfn 20 s\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa m\u1ed9t k\u1ef9 s\u01b0 gi\u1ecfi v\u00e0 t\u1ed3i t\u1ec7? Cu\u1ed9c th\u00ed nghi\u1ec7m so s\u00e1nh th\u1eddi gian vi\u1ebft code, debug, t\u1ed1c \u0111\u1ed9 ch\u1ea1y ch\u01b0\u01a1ng tr\u00ecnh, k\u00edch th\u01b0\u1edbc code\u2026 K\u1ebft qu\u1ea3 l\u00e0 c\u00f3 t\u1edbi 10 s\u1ef1 kh\u00e1c bi\u1ec7t nh\u01b0ng theo c\u00e1 nh\u00e2n t\u00f4i ngh\u0129 r\u1eb1ng s\u1ef1 kh\u00e1c bi\u1ec7t th\u1eadm ch\u00ed c\u00f3 th\u1ec3 l\u00ean t\u1edbi 20 \u0111\u1ed1i v\u1edbi c\u00e1c k\u1ef9 s\u01b0 th\u1ef1c s\u1ef1 tuy\u1ec7t v\u1eddi v\u00e0 t\u00f4i s\u1ebd gi\u1ea3i th\u00edch l\u00fd do t\u1ea1i sao trong b\u00e0i vi\u1ebft n\u00e0y.<\/p>\n