in src/cg21/cg21_pi_mod.c [275:280]
static void charToBool(const char* str, bool arr[][2]) {
for(int i=0; i<CG21_PAILLIER_PROOF_ITERS; i++) {
arr[i][0] = (str[i*2] == '1') ? true : false;
arr[i][1] = (str[i*2+1] == '1') ? true : false;
}
}