Problem 1098. USC Fall 2012 ACM : Code Word Minimum Flipped Bits
This Challenge is to solve Question A of the USC ACM Fall 2012 Contest.
Given an array M of Valid binary codewords(m codewords of width n) and a Received Corrupted(?) codeword of width n, determine the minimum number of flipped bits in the Received codeword to generate a valid codeword.
Input: [ M, v ]
Output: e, minimum number of error(flipped) bits .
From full USC data file
Input: [0 0 0; 1 1 1; 1 1 0], [0 1 0]
Output: 1 as [0 1 0] can convert to [0 0 0] or [1 1 0] with a single flip
Matlab one-liner?
The Winning C solution - not much help:
#include <iostream> #include <stdio.h> #include <string> using namespace std; int main () { freopen("codes.in", "r", stdin); int K,n,b; cin >> K; for (int i = 1; i < K + 1; ++i) { cin >> n >> b; string m[1000], r; for (int j = 0; j < n; ++j) cin >> m[j]; cin >> r; % Process Start int f = b; for (int j = 0; j < n; ++j) { int d = b; for (int k = 0; k < b; ++k) { if (m[j][k] == r[k]) --d; } f = ((f <= d) ? f : d); } % Process End printf("Data Set %d:\n", i); printf("%d\n\n", f); } return 0; }
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